House raising — jacking up a structure to add crawl space, elevate above flood risk, or accommodate new construction underneath — is a structural project that triggers permit requirements in virtually every jurisdiction. The IRC R105 requires a permit for any work affecting the structural integrity of a building, and raising a house qualifies immediately. The specifics vary sharply by location: if you're in a FEMA flood zone, elevation requirements are tighter and inspections more frequent; if you're lifting 2 feet for a basement addition in a non-flood area, the scope is tighter but still permitted. A few jurisdictions exempt cosmetic or minor raising (under 12 inches without foundation alteration), but these are rare exceptions. Most building departments require a structural engineer's certification, proof of utility disconnection and reconnection plans, and a detailed foundation plan showing the new support method. Before you hire a contractor, call your local building department and describe the height, location, and reason for the raise — this 5-minute conversation will tell you exactly what you're dealing with and whether this is a standard permit or a specialty project that requires extra review.
When house raising requires a permit
House raising always requires a permit in FEMA-designated flood zones. IRC R322 (Flood-Resistant Construction) mandates that structures in flood zones either be elevated to or above the base flood elevation (BFE) or meet floodproofing standards for nonresidential buildings. If you're raising your house to move the lowest finished floor above the BFE, you're triggering a flood-related structural permit. The building department will verify the BFE using FEMA's Flood Insurance Rate Maps (FIRMs) and may require a FEMA-certified elevation certificate before and after the work. This adds a separate inspection layer and extends the timeline by 2–3 weeks compared to non-flood-zone raising.
Outside flood zones, house raising still requires a permit whenever it involves structural changes to the foundation, support system, or load path. Lifting a structure 2 feet to insert a basement or crawl space means removing the existing foundation or altering its load distribution — both structural work. Jacking systems, temporary supports, and permanent piers or pilings all require a structural engineer's sealed design and must be inspected during installation and after load transfer. Most jurisdictions do not exempt small raises (under 12 inches) if the foundation system is altered; a few states allow minor raises for utility connections if no structural components are touched, but this is uncommon and must be confirmed with your building department.
The key distinction is scope: if the raise is purely cosmetic (shimming the structure off temporary jacks without altering the foundation or support system), a small number of jurisdictions may exempt it. If the raise involves any foundation work, new supports, or changes to the structure's elevation relative to grade or flood elevation, a permit is required. Document this in writing from your building department before you proceed — don't assume exemption based on height or scope alone.
Structural engineer involvement is nearly universal for house raising, even in jurisdictions with lenient permit policies. The engineer certifies that the jacking plan is safe, that temporary supports will not overload the soil or adjacent structures, and that the permanent support (piers, pilings, new foundation) will carry loads indefinitely. Most building departments require the engineer's sealed calculations as part of the permit application. If you hire a professional house-raising contractor, they typically engage the engineer and submit the design; if you're acting as your own GC, you must hire the engineer separately and include their stamp in your application.
Flood-zone raising adds a compliance layer: you must obtain an elevation certificate from a FEMA-certified surveyor or engineer before construction, and a final elevation certificate after the structure is lifted. These documents prove that the lowest finished floor (or lowest structural member, depending on the zone) is at or above the BFE. Your flood insurance provider will require these certificates before they'll issue or renew a policy. Plan for $300–$600 for pre- and post-elevation surveys, plus the time to coordinate with the surveyor and the building department's elevation-certificate reviewer.
Utility disconnection and reconnection are prerequisites: gas, electric, water, sewer, and drainage must be safely disconnected before jacking begins and reconnected (often at a new grade) after the structure is set. In many jurisdictions, the building department requires written proof from each utility company confirming disconnection and safe reconnection plans. This is often the longest single delay in house-raising permits — utility companies can take weeks to schedule and complete the work. Start utility notifications as soon as you have a firm lift date.
How house-raising permits vary by state and region
Flood-prone states (Florida, Louisiana, North Carolina, Texas) have highly prescriptive elevation rules tied to federal flood insurance requirements. Florida Building Code Chapter 3 requires structures in coastal high-hazard areas to elevate above the base flood elevation plus freeboard (typically 1–2 additional feet). Louisiana uses a similar approach but also has wind-uplift requirements for elevated structures — the pilings or piers must resist hurricane wind loads. North Carolina requires elevation certificates and applies stricter scrutiny to the jacking plan if the house is within a coastal A-zone. Texas has zone-by-zone variation; Harris County (Houston) requires elevation above the 100-year flood elevation, while inland counties may use the IRC R322 minimum. All four states require a licensed professional engineer's seal on elevation certificates, not just a surveyor's. If you're raising in one of these states, budget 4–6 weeks for plan review and expect multiple inspection cycles.
Midwest and northern states (Wisconsin, Minnesota, Michigan, Illinois) apply the IRC R322 standard but often add local amendments. Wisconsin requires structural engineer certification for any raise over 12 inches and mandates that the new foundation accommodate the state's 48-inch frost depth (deeper than the IRC's 36-inch minimum in many areas). Minnesota similarly enforces its 42-inch frost requirement for pilings and footings. Illinois in the Chicago area uses the 2021 International Building Code with amendments; Cook County requires a structural engineer's sealed design and separate electrical, plumbing, and mechanical permits if utilities are being relocated. The standard timeline is 2–3 weeks for plan review and 1–2 weeks for inspections (footing, framing, final). These states rarely trigger flood-elevation requirements unless the house is in a mapped FEMA zone.
California has state-level amendments requiring seismic design for elevated structures. Any house raising in California must account for lateral (earthquake) forces in addition to vertical loads. The engineer's design must show that the new support system (pilings, cripple walls, lateral bracing) resists the seismic loads specified in the 2022 California Building Code (based on the IBC). This adds complexity and cost; structural engineers in California charge 20–40% more for elevated structures than non-seismic raises. Plan-review times in California counties run 3–4 weeks due to the seismic review requirement. If the house is also in a flood zone (rare, but it happens), both flood-elevation and seismic requirements apply.
Mountain and high-altitude states (Colorado, Utah, Wyoming) often have steep slopes, unstable soils, or high-wind zones that affect the raising design. Colorado requires soil reports for houses being raised in areas with expansive clay or shallow bedrock. Utah's building code includes high-wind requirements for elevated structures (similar to coastal wind-uplift rules). Wyoming has permafrost and shallow groundwater issues in the northern regions that complicate footing depth. These states typically require a geotechnical report in addition to the structural engineer's design if the soil or slope conditions are uncertain. Budget an extra 1–2 weeks for geotechnical review and 1–2 weeks for the soil-bearing-capacity inspection.
Common scenarios
Raising a house 3 feet in a FEMA flood zone to meet base flood elevation
You're in a coastal flood zone with a base flood elevation of 12 feet, and your house's lowest finished floor is currently at 10 feet. You're raising it to 12.5 feet to comply with flood-insurance requirements. This triggers a full structural permit, a flood-elevation permit, and utility disconnection/reconnection work. You'll need a structural engineer's sealed jacking and foundation design, a pre-raise elevation certificate from a FEMA-certified surveyor, proof of utility disconnection, and a final elevation certificate after the structure is set. Expect 4–6 weeks for plan review (flood-zone projects move slowly), 1–2 weeks for footing inspection, 1–2 weeks for structural inspection, and 1 week for final/elevation-certificate review. Permits run $200–$600; surveys and engineer design $1,500–$3,500; utilities $500–$2,000; contractor labor $15,000–$40,000 depending on house size and accessibility. Do not start jacking until you have written approval from the building department and confirmation of utility disconnection from all service providers.
Raising a house 18 inches in a non-flood area to add 3 feet of crawl space
You're in a residential area with no flood-zone designation. You want to jack the house, install new piers under the existing footprint, and add 18 inches of clearance. This is a structural permit because you're altering the foundation load path. You'll need a structural engineer's design for the jacking plan, the new pier system, and temporary support during the lift. Utilities (electrical, gas, water) may need minor disconnection if they're in the crawl space — coordinate with the utility companies. Most jurisdictions require a footing inspection (to verify pier installation) and a structural inspection (to verify load transfer). Plan 2–3 weeks for plan review, 1 week for footing inspection, and 1 week for structural framing/final inspection. Permit fee: $100–$300. Engineer design: $1,200–$2,500. Contractor labor: $8,000–$20,000. This is a straightforward project in most jurisdictions outside flood zones.
Shimming a house 6 inches with temporary jacks — no foundation alterations
You've found that one corner of your house is settling, and you want to temporarily jack it level without replacing the foundation. This is a borderline case. Most jurisdictions require a permit because you're applying concentrated jack loads to the existing foundation, which counts as structural work. A few jurisdictions exempt temporary raises under 12 inches if no permanent structural changes are made — but this is uncommon and must be confirmed in writing before you proceed. The safest approach: call your building department, describe the scope (temporary jacking, no foundation work, no permanent new supports), and ask if a permit is required or if a structural engineer's letter is sufficient. In many cases, the department will issue a verbal exemption but request the engineer's signed letter certifying that the jacking plan is safe and temporary. Get this in writing via email. If a permit is required, it's typically a $50–$150 over-the-counter permit with a 1-week turnaround and a single footing or structural inspection.
Raising a house 2 feet in California to add earthquake bracing under cripple walls
You're in a seismically active area of California and want to raise your pre-1960s house 2 feet to install new cripple-wall bracing and foundation bolting. This triggers a structural permit with seismic design requirements. You'll need a structural engineer licensed in California to design the jacking plan, new piers or pilings, and lateral-bracing system that resists the seismic forces specified in the current California Building Code. The engineer must also certify that the new system will not destabilize adjacent structures or utilities. The building department will require a soil report if the soil type is unknown. Plan 3–4 weeks for plan review (seismic review is thorough), 1 week for footing/pier inspection, 1–2 weeks for structural framing/bracing inspection, and 1 week for final. Permit fee: $200–$500. Structural engineer + seismic design: $2,000–$4,000. Soil report (if required): $800–$1,500. Contractor labor: $12,000–$30,000. This is a common retrofit project in California but requires more planning than non-seismic raises.
Raising a house 4 feet to build a new first floor underneath in a high-wind coastal zone
You're in a coastal high-hazard area (like South Florida or coastal Texas) with both flood-elevation and wind-design requirements. You're raising the existing house 4 feet to install a new first floor with parking or living space underneath, then re-supporting the elevated structure on new piers. This is a complex structural project with multiple permit layers: structural-elevation permit, flood-elevation permit, new-construction permit for the ground floor, utility permits (if utilities are being relocated), and possibly a variance if the new footprint exceeds setback or lot-coverage limits. You'll need a structural engineer's sealed design for the jacking, new piers (designed for wind uplift as well as vertical load), lateral bracing, and the new ground-floor framing. A FEMA-certified elevation certificate is mandatory. Expect 6–8 weeks for plan review (multiple departments review), 2–3 weeks for footing/pier inspection, 2–3 weeks for structural inspections, and 1–2 weeks for final/elevation review. Permit fees: $300–$800. Structural engineer: $3,000–$6,000. Elevation certificates: $400–$700. Contractor labor: $30,000–$75,000 depending on ground-floor scope. This is a major project; do not proceed without a pre-submittal meeting with the building department.
What you need to file and who can pull the permit
| Document | What it is | Where to get it |
|---|---|---|
| Permit application (Building Permit form) | The standard building permit form, filled in with the project description, address, scope (height of raise, reason, new foundation system), estimated cost, and contractor info. Most jurisdictions accept this as a standard over-the-counter or online filing. | Your local building department website or counter. Many jurisdictions now offer online portals (e.g., Madison's DPI+ system, Orange County FL's ePermitting portal). If the department doesn't have an online system, you'll file in person with printed copies. |
| Structural engineer's design package (sealed) | The structural engineer's calculations, drawings, and specifications for the jacking system, temporary supports, permanent foundation (piers, pilings, new footings), load paths, and equipment specs. Must be sealed (wet signature or digital seal) by a PE licensed in your state. Typically 5–20 pages depending on complexity. | The structural engineer you hire prepares this. The engineer's stamp and signature are non-negotiable; building departments will not accept unsigned or unsealed designs. Budget $1,500–$4,000 for the engineer's design work. |
| Site plan showing property lines, setbacks, and current structure location | A scaled drawing (typically 1/8 inch = 1 foot or 1/16 inch = 1 foot) showing the house footprint, lot boundaries, setback lines, easements, utilities, and any adjacent structures. Must include north arrow and scale bar. Some departments require easements to be marked and distances from the structure to property lines labeled. | Your title company can provide a legal description and lot survey. A surveyor can prepare a full boundary survey for $400–$800; a simpler sketch-based site plan from a local survey company runs $200–$400. Architects and engineers often include this with their design package. |
| Elevation certificate (pre-raise, FEMA form 81-31) | A FEMA-certified document completed by a licensed surveyor or engineer that documents the existing lowest finished-floor elevation (or lowest structural member) and the lowest adjacent grade. Required in FEMA flood zones before you raise the house. Includes the property's flood-zone designation, BFE, and the vertical distance between the structure and the BFE. | A FEMA-certified surveyor or engineer completes this. Most surveying firms offer this service for $150–$300. Your building department may have a list of certified providers. Do not use uncertified surveyors; FEMA and insurance companies will reject the certificate. |
| Elevation certificate (post-raise, FEMA form 81-31) | The same document completed after the house is raised, confirming the new lowest finished-floor elevation and verifying that the structure now meets or exceeds the BFE. Required for final approval in flood zones and for flood-insurance policy updates. | The same FEMA-certified surveyor or engineer who completed the pre-raise certificate. Many contractors schedule this as part of the final-inspection process. Cost: $150–$300. |
| Utility disconnection/reconnection letters | Written confirmation from each utility company (gas, electric, water, sewer, drainage) that they have disconnected service before jacking and will reconnect after the structure is set. Some building departments require these letters in advance; others accept them after-the-fact if work is inspected. Addresses utility-safety compliance. | Contact each utility company directly. Provide your address, a description of the raising project, and your intended dates. Allow 2–4 weeks for utilities to schedule and confirm. Many building departments have a standard letter template; use it when notifying utilities. |
| Soil report (if required by the jurisdiction or engineer) | A geotechnical engineer's report describing the soil type, bearing capacity, depth to groundwater, and any hazards (expansive clay, rock, permafrost, slope instability). Required in areas with uncertain soil conditions or where the engineer specifies a soil report is needed. Typically 10–30 pages including boring logs and laboratory test results. | A geotechnical engineer (different from the structural engineer) performs exploratory borings and laboratory testing. Cost: $800–$2,000. Most needed in mountain states, high-clay areas, or jurisdictions that mandate it. Ask your building department if one is required before you hire the engineer. |
| Contractor license verification / proof of insurance | A copy of the contractor's active state license (if your state requires contractor licensing) and proof of general liability and workers' compensation insurance covering the house-raising work. Some jurisdictions require this before permit issuance; others at the time of final inspection. | Your contractor provides this. License numbers can be verified via your state's licensing board (e.g., Florida Department of Business and Professional Regulation). Insurance certificates of insurance come directly from the contractor's insurance broker. |
Who can pull: A licensed structural engineer or the general contractor (if licensed and bonded) typically submits the permit on behalf of the homeowner. Many homeowners work with the contractor, who engages the structural engineer and submits the complete application. You can submit the permit yourself if you act as your own GC, but you'll need to hire a structural engineer separately and ensure all documents are complete and signed. Some jurisdictions require the permit applicant to be the property owner or the licensed contractor; others accept any authorized representative. Ask your building department before you file. If you're working with a professional house-raising company, they usually handle permitting as part of their scope — confirm this in the contract.
Why house-raising permits get rejected and how to fix them
- Structural engineer's design is unsigned or missing seal.
The engineer must sign and stamp every page of calculations and the cover sheet. Digital (e-signature) seals are acceptable in most jurisdictions but must comply with your state's PE licensing rules. Wet-ink signatures are always safe. Resubmit with the signed/sealed package. If the engineer is in another state, confirm with your building department that an out-of-state PE seal is acceptable; some jurisdictions require a local PE to review and co-sign. - Site plan missing property lines, easements, or distances to property lines.
The building department needs to verify setbacks and lot coverage. Add a legal description, north arrow, scale, and dimensions from the house corners to each property line. If easements cross the property (utility, drainage), mark them clearly. A surveyor's plat is the safest option, but an engineer's scaled sketch with dimensions works if signed by the PE. Resubmit the revised plan. - Elevation certificate incomplete or completed by an uncertified surveyor.
FEMA form 81-31 must be completed by a surveyor or engineer certified by the American Society of Civil Engineers (ASCE) or the state licensing board. Building departments will not accept certificates from non-certified providers. Hire a certified surveyor, provide them with the FEMA form, and resubmit. Certification credentials are usually listed on the surveyor's website or license. - Application identifies the project as a 'foundation repair' or 'repair permit' instead of a new structural work permit.
House raising is not a repair — it's structural work. Resubmit the application using the correct permit category: 'Structural Alteration' or 'House Raising' (whatever your jurisdiction calls it). The wrong permit type will often result in an immediate rejection because the department's online system may route it to the wrong reviewer or assess the wrong fee. - Jacking plan lacks temporary support details (location of jacks, sequence of lifting, load-calculation verification).
The structural engineer's design must show where each jack will be located, the load each jack will carry, the lifting sequence, how long temporary supports will remain in place, and calculations verifying that the structure, temporary supports, and bearing surfaces can handle the loads. This is often missing in simplified designs. Ask the engineer for a detailed jacking schedule and temporary-support plan. Resubmit. - New pier or footing design lacks frost-depth compliance or doesn't meet the jurisdiction's local building code amendments.
The engineer must verify the frost depth required by the local code (often deeper than the IRC minimum — Wisconsin requires 48 inches, Minnesota 42 inches, etc.). Calculate the footing depth from the finished grade after raising. If the design references the wrong frost depth or the wrong code edition, ask the engineer to revise and recalculate. Resubmit with the corrected design. - Flood-zone project: no elevation certificate provided or certificate shows existing elevation above the BFE.
If the structure is in a flood zone, an elevation certificate is mandatory for final approval. If the existing elevation is already above the BFE, you may not need to raise the structure at all — confirm the BFE with FEMA's FIRM and the building department. If raising is necessary, provide the pre-raise certificate so the department knows how far you're lifting. If you haven't obtained a certificate, hire a FEMA-certified surveyor immediately. - Permit application lists a cost estimate that's unrealistically low or high, triggering a valuation review.
Some jurisdictions calculate permit fees based on project valuation. If you underestimate (to save on fees), the department may reject it and recalculate. Use a realistic estimate: for a simple crawl-space raise, $8,000–$20,000; for a complex 4-foot raise with new ground-floor construction, $30,000–$75,000. If the building department questions your valuation, provide a contractor's quote or cost-estimate breakdown. Resubmit with corrected valuation if requested.
House-raising permit and project costs
Permit costs for house raising vary by jurisdiction and scope but typically run $100–$500 as a base fee, with some departments charging a percentage of project valuation (1.5–2%) if the valuation is higher. Most jurisdictions charge a flat rate for the structural permit, then add separate fees for any subpermits (plumbing, electrical, mechanical) if utilities are being relocated. Flood-zone projects may have an additional $50–$150 review fee for the elevation certificate. Plan-review duration and inspection frequency both affect the total cost and timeline: a simple 18-inch crawl-space raise with no utility work might be a single $150 permit with one footing and one framing inspection over 3 weeks. A complex 4-foot raise in a flood zone with new ground-floor construction and utility relocation could involve multiple permits, 3–4 weeks of plan review, and 5–7 inspections spread over 6–8 weeks.
| Line item | Amount | Notes |
|---|---|---|
| Permit fee (structural raising permit) | $100–$500 | Most jurisdictions charge a flat rate or 1.5–2% of project valuation, whichever is higher. Flood-zone projects may add $50–$150 for elevation-certificate review. |
| Structural engineer design | $1,200–$4,000 | Covers jacking plan, permanent foundation design, and sealed calculations. Simple raises (18 inches, small footprint) are on the lower end; complex raises (4+ feet, large houses, seismic design) are on the higher end. |
| FEMA elevation certificates (pre- and post-raise) | $300–$600 | Required in flood zones only. $150–$300 per certificate from a FEMA-certified surveyor or engineer. |
| Soil geotechnical report | $800–$2,000 | Required if soil conditions are uncertain or the jurisdiction mandates it. Includes exploratory borings and lab testing. Not needed in most residential areas with stable soil. |
| Utility disconnection and reconnection | $500–$2,000 | Utility companies charge for service drops and reconnections. Timeline often determines the cost — emergency reconnection costs more. Budget 2–4 weeks for utility coordination. |
| Contractor labor and equipment (house raising) | $8,000–$75,000 | Depends on house size, height of raise, soil conditions, and accessibility. Small raises (18 inches, simple foundation) are $8,000–$20,000. Large raises (4+ feet, complex foundation, new ground floor) are $30,000–$75,000 or more. |
| Plan review and inspection schedule | 2–4 weeks (non-flood) / 4–8 weeks (flood zone) | Plan review: 2–3 weeks for standard projects; 4–6 weeks for flood-zone projects with multiple reviews. Inspections: footing (1 week after footings are set), structural (1 week after load transfer), final (1 week). Flood zones add elevation-certificate review (1 week). |
Common questions
Do I need a permit if I'm just lifting the house a few inches to level it?
Most jurisdictions require a permit for any structural lifting, even small amounts. The exception is rare: a few jurisdictions exempt temporary shimming under 12 inches if no foundation work is involved. Call your building department and describe the scope — if it involves jacking systems, concentrated loads on the foundation, or any permanent structural changes, a permit is required. Get the exemption in writing before you proceed.
What's the difference between a house raise and a house move?
A house raise lifts the structure vertically and re-supports it in place on new piers or foundation. A house move relocates the structure horizontally to a different lot. Both require structural permits, but a house move also requires street permits, utility relocation permits, and crane/transport permits from the city or county. House moves are much more complex and expensive ($30,000–$100,000+) because they involve road closures, temporary utility relocations, and special equipment. A house raise is a vertical operation that typically takes 2–4 weeks; a move can take 2–3 months.
Can I raise my house myself without hiring a contractor?
You can act as your own general contractor, but you must hire a licensed structural engineer to design the jacking plan and new foundation system. The engineer's sealed design is non-negotiable — building departments will not approve a permit without it. You can do some of the demolition work (removing interior finishes, rerouting utilities with licensed plumbers and electricians), but the actual jacking, pier installation, and load transfer should be done by a professional house-raising crew with experience and insurance. Many jurisdictions require the GC (you, in this case) to carry general liability insurance and maintain a valid business license. Check your local regulations before you proceed as your own GC.
What happens if my house is already slightly above the base flood elevation but I want to raise it further for extra safety?
If your house is in a flood zone and the existing lowest finished floor is already at or above the BFE, the raise is optional — you don't face a mandate. However, many homeowners choose to raise an additional 1–2 feet for freeboard (extra safety above the BFE). This still requires a permit and an elevation certificate, but the plan review may be faster because you're not addressing a compliance violation. After the raise, the new elevation certificate will show the increased freeboard, which may lower your flood-insurance premiums. Confirm with your building department and flood-insurance provider whether the additional raise qualifies for rate reductions.
Do I need separate permits for the utilities if I'm raising the house?
If you're disconnecting and reconnecting gas, electric, water, or sewer lines, the utility companies typically handle those as separate service requests (not building permits). However, if you're installing new electrical circuits, moving a water heater, or replacing plumbing in the new space, you'll need subpermits (electrical, plumbing, mechanical) filed under the main structural permit. Coordinate with the utilities first to understand what they'll do for free and what requires a contractor. Licensed plumbers and electricians often file subpermits on your behalf; the building department will not issue final approval on the structural permit until all subpermits are closed.
How long does it take from permit approval to final inspection in a flood zone?
Plan 4–8 weeks total. Breakdown: 1–2 weeks for the building department to issue the permit after plan approval; 1–2 weeks for footing inspection (after piers are set); 1–2 weeks for structural inspection (after load transfer); 1–2 weeks for final inspection and elevation-certificate review. Delays often come from utility work (which is outside the building department's control) or from the surveyor's availability for the final elevation certificate. Schedule the surveyor in advance; don't wait until the structure is fully raised to book them.
What if I discover a problem during the raise — say, the soil isn't bearing well or a foundation member is damaged?
Stop work and notify the building department and the structural engineer immediately. The engineer will assess the problem, determine whether temporary supports need adjustment or additional piers, and issue a revised design. The building department will inspect the revised work before you continue. This adds 1–2 weeks to the timeline but is better than continuing with a compromised structure. Your contractor's insurance should cover the cost of design changes if they result from unforeseen conditions (not negligence). Have this conversation with the contractor before work starts.
Can my homeowner's insurance cover house raising, or do I need a separate project policy?
Your homeowner's insurance will not cover the cost of the raise itself. You'll need a builder's risk or installation floater policy that covers the structure during the raising process (while it's temporarily supported and potentially exposed to weather). Your contractor or the structural engineer can help you understand the insurance requirements. Most professional house-raising contractors carry this coverage as part of their pricing. Do not proceed without confirming that the work is insured.
If I'm raising a house in a flood zone, do I have to use pilings or can I use a new concrete foundation slab?
In most flood zones (V-zones and A-zones with specific velocity or wave-action hazards), pilings or piers are required because they allow floodwater to flow underneath the structure. A solid concrete slab or foundation wall can trap water and cause hydrostatic pressure, which can damage or collapse the structure. The structural engineer will determine the appropriate system based on the flood zone and the new elevation. V-zones and high-hazard coastal areas require pilings; standard A-zones may allow piers on pilings or helical screw piles. Ask your structural engineer and building department which systems are approved for your flood zone.
What's the most common reason house-raising permits get delayed?
Utility disconnection and reconnection. Utility companies can take 2–4 weeks to schedule and complete the work, and building departments often will not issue permits until utilities confirm they're disconnected. Start coordinating with utilities as soon as you have a permit application and a target lift date — do not wait until the permit is approved. The second-most-common delay is incomplete structural design; missing details about the jacking plan, temporary supports, or footing depth often trigger a request for resubmission. Have a detailed conversation with the structural engineer before you submit the permit to avoid these holdups.
Ready to move forward with your house raise?
Start with a call to your local building department. Describe your project — the height of the raise, whether you're in a flood zone, and your reason for raising (crawl space, flood elevation, new ground floor). The building inspector can tell you in 5 minutes whether you need a permit, what documents to prepare, and roughly how long plan review will take. If you're in a flood zone, ask for a copy of the base flood elevation and the elevation-certificate process. Get the frost-depth requirement in writing. Then hire a structural engineer who has experience with house raises in your area — ask the building department for referrals or check professional organizations like ASCE. The engineer will guide the rest of the permitting process and ensure your design meets code. Do not start work without written permit approval and confirmation of utility disconnection from all service providers.
Related permit guides
Other guides in the Basement, demo & structure category: