New Windows Permit Rules (2026)

Any time you cut a new opening in your wall for a window or door, you need a permit. This is not a gray area. Unlike window replacement, which often follows a simpler path, a new opening is structural work. You're removing framing members, installing a header, and potentially changing how loads transfer through the wall. The building code treats this the same way it treats other structural modifications — with plan review, inspections, and specific code requirements.

The three things that drive permit scope and cost are the opening size, whether the wall is load-bearing, and whether you need a new header or lintel. A small window opening in a non-load-bearing wall is straightforward; a large door opening in a load-bearing exterior wall requires structural calculations. Coastal jurisdictions add a fourth layer: impact-resistance and wind-pressure design.

You can't skip this. Cutting an opening without a permit creates several real problems. First, there's the liability issue — you've altered your home's structural integrity and your insurance likely won't cover problems that result. Second, when you sell, a title company or home inspector will find an unpermitted opening and the sale can stall or collapse. Third, if there's ever a fire or collapse, and investigators find an unpermitted structural change, you're personally liable.

The good news: permit-pull is fast for straightforward projects. Most jurisdictions process new-window permits in 2 to 4 weeks if you get the structural details right the first time. Over-the-counter approval is possible in some places if the opening is small and the wall is non-load-bearing.

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Replacing windows in the existing rough opening?

This guide covers cutting new window or door openings (or enlarging existing ones) — structural work that always needs a permit. For like-for-like swaps in an existing opening, see the window replacement permit guide instead.

When a new window or door opening requires a permit

Every new window or door opening requires a permit. There are no exemptions. The IRC does not allow you to cut a new hole in your wall without review. The only way to avoid permit is to replace an existing opening with the same size window or door — and even that's tightly defined as like-for-like in the same rough opening. If you're enlarging the opening, moving it, or creating one where none existed, you need a permit.

The first decision is whether the wall is load-bearing. Load-bearing walls carry weight from above — typically exterior walls on the first floor, and any wall that runs perpendicular to floor joists. Non-load-bearing walls carry only their own weight and do not support the structure above. A load-bearing wall requires structural calculations and engineering. A non-load-bearing wall is simpler but still requires a header (or blocking) to bridge the opening and maintain the wall's shear strength. If you don't know whether your wall is load-bearing, the building department can tell you during the pre-application call — or assume it is (safer move).

The second decision is whether a header is required. In most cases, yes. IRC R602.10 requires a header above any opening in a frame wall. The header must be sized to handle the load it carries. In a load-bearing wall, a structural engineer calculates the header size based on the span, the tributary load above, and the material (2x6, 2x8, etc., or a steel beam). In a non-load-bearing wall, the code allows smaller headers or even doubled 2x4s, but you still need one and you need to document it. If you're cutting a small window in a non-load-bearing wall, some jurisdictions allow a prescriptive header sizing table from the IRC without engineering — but the plan must show which table was used.

The third decision is whether bracing recalculation is needed. When you remove a section of wall to create an opening, you may reduce the wall's lateral-bracing strength. IRC R602.10 and R602.11 require that bracing (plywood sheathing, diagonal bracing, let-in bracing) be continuous or properly spaced around the opening. If your plan removes a section of sheathing, the building department will ask whether the remaining bracing is adequate or whether you need to reinforce adjacent sections. This is especially critical in high-wind and seismic zones.

IRC R310 requires egress windows in any bedroom. If you're cutting a new window and it's serving as the bedroom's only emergency exit, it must meet the egress standard: 5.7 square feet of opening for a basement, 10 square feet for other rooms, with a sill height no higher than 44 inches. This is a common trip-up. A homeowner cuts a window for light and doesn't realize it's now an egress requirement. The inspector catches it during framing review and the permit stalls until you fix it.

Exterior cladding and flashing add one more layer. IRC R703 requires that all windows be properly flashed and that house wrap, felt, or other water-resistant barrier not be penetrated without protection. Your plan must show flashing detail at the window head and sill. In most jurisdictions, a standard flashing detail copied from an IRC or manufacturer's guide is acceptable, but you must show it. Missing flashing detail is one of the top rejection reasons.

How new window and door opening permits vary by state and region

Coastal jurisdictions in Florida, California, Hawaii, and the Atlantic hurricane belt add impact-resistance requirements. Florida Building Code Section 1609.1 and ASTM D3039 define impact-resistant glazing and frames for the High Velocity Hurricane Zone (HVHZ). If your project is in a coastal county in Florida, you must use impact-rated windows and doors, and your permit must document the impact rating and the design wind speed (usually 160+ mph) that the window is rated for. Texas and Louisiana follow similar hurricane-zone standards. These are not optional. An inspector will verify the window specifications before issuing a final approval. The cost difference for impact-rated glazing is typically 30 to 50 percent higher than standard windows, but it's required by code, not a choice.

California has additional energy-code requirements. Title 24 specifies U-factors and solar heat gain coefficients (SHGC) for windows depending on the climate zone and whether the wall faces north or south. A new opening requires documentation that the window meets the Title 24 requirement for that zone. Some jurisdictions will allow you to cite the window's NFRC label; others require a Title 24 compliance form. Arizona and Nevada follow similar energy codes. If you're in a cold climate (Minnesota, Wisconsin, Colorado), check your state's energy code — many require low-U-factor windows (U-0.30 or better) for new openings.

Seismic zones (California, Pacific Northwest, Colorado Front Range) may require additional bracing or analysis if the opening is large or in a critical wall. Some jurisdictions in these zones prohibit large openings in perimeter shear walls or require engineering to show that bracing is maintained around the opening. A 4-foot-wide sliding glass door in a seismic zone is usually fine; a 12-foot-wide opening may require a structural engineer's sign-off.

Historic districts and covenant-controlled neighborhoods add aesthetic review. If your home is in a local historic district or subject to a homeowner-association design review, you may need approval from the historic commission or architectural review board before the building department will issue a permit. This can add 4 to 8 weeks to the timeline. Window style, color, and material may be restricted. This is separate from the building permit but often required before you can pull it.

Common scenarios

Small window in a non-load-bearing interior wall

You're cutting a 3-foot-wide window in an interior wall that doesn't carry any load (you've confirmed this with the building department or a contractor). You need a permit, but it's a quick one. Your plan shows a 2x6 header over the opening, using prescriptive sizing from IRC Table R602.10. The opening is sized for light only, not egress. Estimated timeline: 1 to 2 weeks. Estimated cost: $200 to $300. Inspections: framing (header and bracing), then final. This is often approved over-the-counter if the plan is clear and complete.

Large patio door in a load-bearing exterior wall

You're cutting a 6-foot-wide sliding glass door in the south-facing exterior wall of a single-story home. This wall is load-bearing (it's an exterior wall on the first floor). You need a structural engineer to size the header. The engineer calculates a 4x12 beam or a steel lintel based on the tributary load above and the door span. You provide the engineer's calculations with your plan. The plan shows proper flashing and sheathing detail. Estimated timeline: 2 to 4 weeks (includes engineering time). Estimated cost: $150 to $200 for the permit, plus $400 to $800 for structural engineering. Inspections: framing (engineer may need to observe header installation), exterior cladding, final. If you're in a hurricane zone, the door must be impact-rated.

Bedroom egress window in a basement, non-load-bearing wall

You're cutting a window in the basement wall for emergency egress. The window itself is 3 feet wide and 2 feet tall (6 square feet), which meets the 5.7 square-foot minimum for a basement egress window. The wall is non-load-bearing. The permit is straightforward structurally but the inspector will verify the opening size and sill height (must be under 44 inches). If your opening is 3.2 square feet, it fails egress requirements and you'll need to enlarge it or install a different window. Estimated timeline: 2 to 3 weeks. Estimated cost: $200 to $350. Inspections: framing, window installation (to confirm egress compliance), final. The tightest part is the sill height and opening area — get it wrong and you'll be asked to enlarge the window after framing is done.

Large opening in load-bearing wall in seismic zone

You're cutting a 10-foot-wide opening for a bifold glass door in a load-bearing exterior wall in the Pacific Northwest (seismic zone). This requires a structural engineer. The engineer must evaluate whether the opening compromises the wall's shear-bracing strength and whether reinforcement is needed around the opening. A large opening in a perimeter shear wall may require additional diagonal bracing or steel reinforcement on one or both sides of the opening. The permit review may require a structural engineer's review by the building department. Estimated timeline: 3 to 5 weeks. Estimated cost: $300 to $500 for the permit, plus $600 to $1,200 for structural engineering. Inspections: framing, bracing verification, exterior, final. Plan to have the engineer available during framing inspection if requested.

New window opening in a house in Florida's High Velocity Hurricane Zone

You're cutting a 3-foot window in an exterior wall in Miami-Dade County. The wall is non-load-bearing. The building code requires impact-rated glazing and frames (ASTM D3039). Your window must be rated for the design wind speed (160+ mph in HVHZ). Your permit must show the window's impact rating and the design wind speed it's rated for. The plan includes flashing and house-wrap detail. You cannot use standard windows — the window must be certified impact-resistant. Estimated timeline: 2 to 3 weeks (longer if the window is special order). Estimated cost: $150 to $250 for the permit. The window itself costs 30 to 50 percent more than a standard window. Inspections: framing, window installation, exterior, final. The inspector will verify the impact rating before final approval.

What documents to file and who can pull the permit

Document	What it is	Where to get it
Permit application	Standard building permit application form for your jurisdiction. Includes project address, owner name, contractor name (if applicable), project description, and estimated cost.	Building department website or in-person at the permit office.
Site plan or floor plan showing the window/door location	A rough sketch showing which wall the opening is in, the distance from adjacent windows or doors, and (if applicable) distance to property lines or easements. Does not need to be to scale or professionally drawn for small residential projects.	You can draw it yourself on a computer or by hand. Some jurisdictions provide a template. If your home is in a covenant or historic district, you may need a more formal plan.
Framing detail showing header sizing	A detail drawing showing the opening dimensions, header size (e.g., 2x6, 2x8, 4x12, or steel lintel), and how the header is supported (on the wall studs on each side). Must show enough surrounding framing to prove the header is properly supported. For load-bearing walls, structural calculations or engineer's calculations must accompany this.	If you have a contractor or architect, they provide this. If you're doing it yourself and the opening is small and non-load-bearing, you can sketch this on graph paper referencing IRC Table R602.10. If a structural engineer is involved, they provide the detail and stamp it.
Structural calculations (load-bearing walls only)	Calculations showing header size based on tributary load, span, and material properties. Prepared by a structural engineer or architect. Stamped and signed by the engineer. For non-load-bearing walls and small openings, prescriptive sizing tables from the IRC may be acceptable without calculations — ask your building department.	Structural engineer or architect. Cost ranges from $400 to $1,200 depending on complexity.
Exterior flashing and house-wrap detail	A detail drawing (or reference to a standard detail) showing how water is shed from the window opening. Must show flashing at the head, sill, and sides, and how house wrap or felt is integrated. A copy of the window manufacturer's installation flashing detail is often acceptable.	You can provide the window manufacturer's installation guide. If you're doing custom flashing, have the contractor or a detail sketch show it.
Window/door specifications and impact rating (if required)	The manufacturer's specifications or NFRC label showing the window's U-factor, SHGC, and (in hurricane zones) impact rating and design wind speed. In Florida HVHZ, the impact rating is mandatory.	From the window supplier or the manufacturer's website. Print the label or spec sheet and include it with the application.
Egress certification (if cutting a bedroom window)	Calculation or plan note showing that the window meets egress requirements: minimum 5.7 sq ft opening for basement, 10 sq ft for first floor, sill height under 44 inches. A simple note on the plan is usually sufficient: 'Egress window — opening 3.2 x 2.5 = 8 sq ft, sill height 40 inches — meets IRC R310.1.'	You calculate this from your opening dimensions. Include it on your plan or as a note.

Who can pull: The property owner can pull the permit. A licensed contractor (general, framing, or as required by your state) can pull it on your behalf. An architect or engineer can also pull it as part of their service. The person pulling the permit does not need to be the person doing the work — you just need to designate who the responsible party is on the application. Some jurisdictions require the contractor to sign and pull the permit; others allow the homeowner to pull it and hire a contractor after. Check your local rules.

Why permit applications for new window and door openings get bounced back

Header sizing not documented or undersized
For load-bearing walls, provide structural calculations from an engineer or architect. For non-load-bearing walls, reference the IRC Table R602.10 on your plan and label the header size (e.g., '2x6 header, prescriptive from IRC R602.10'). The inspector needs to see that the header is adequate for the opening size. Do not guess. If the wall is load-bearing and you show a 2x4 header for a 6-foot opening, it will be rejected.
No flashing or house-wrap detail shown
Add a detail drawing to your plan showing how water is shed from the opening. At minimum, show flashing at the head and sill, and how house wrap is lapped around the opening. You can use the window manufacturer's standard flashing detail or sketch your own. Most rejections for this reason are resolved by adding a simple detail or reference to the manufacturer's installation guide.
Bracing or sheathing recalculation missing (especially in high-wind or seismic zones)
If you're removing a section of wall sheathing or diagonal bracing, you must show on the plan how the wall's lateral-bracing strength is maintained. Either the remaining sheathing is continuous around the opening, or you've reinforced adjacent sections. If you don't know, have a structural engineer evaluate it. In seismic zones, this is especially critical — the building department may require an engineer's sign-off.
Egress requirements not met (opening too small or sill too high)
If this is a bedroom window, measure the opening carefully. Basement egress windows must be at least 5.7 square feet; other rooms need 10 square feet. Sill height must be under 44 inches. If your opening is marginal, enlarge it. Calculate the square footage: opening width x opening height = gross area. Subtract any mullions or frames if they block the opening. A rejected egress window often means returning to the framing stage to enlarge the opening, which is expensive and time-consuming.
Missing impact rating in hurricane zone (Florida, Hawaii, coastal California, Texas, Louisiana)
Specify an impact-rated window. Obtain the manufacturer's documentation showing the window's impact rating (ASTM D3039) and the design wind speed it's rated for. Provide this with your permit application. Standard windows will not be accepted in HVHZ counties. This is non-negotiable.
Plan is not clear or missing dimensions
Provide a plan that shows the opening dimensions (width x height), the location in the wall, and the header size. The plan doesn't need to be professionally drawn, but it must be legible and complete. Include a note showing the opening is measured in the opening itself, not the rough opening — this prevents confusion with drywall and framing.
Structural engineer's calculations lack required information (load-bearing walls)
The calculations must show the tributary load, the span of the opening, the material and size of the header, and the allowable-stress or limit-state check. The engineer must stamp and sign the calculations. If the calculations are incomplete, the building department will return them with a request for clarification. Budget time for this back-and-forth.

Typical costs for a new window or door opening permit

Building permit fees for new window and door openings typically range from $150 to $800, with most projects clustering in the $200 to $400 range. The fee is usually based on a percentage of the project valuation (often 1.5 to 2 percent) or a flat fee depending on the opening size and structural complexity. A small window in a non-load-bearing wall is usually on the low end; a large door in a load-bearing wall is higher.

Don't assume the permit is your only structural cost. If the wall is load-bearing or if the opening is large, you'll likely need a structural engineer. Engineering fees run $400 to $1,200 for a straightforward opening. If the wall is complex or in a seismic or high-wind zone, costs can exceed $1,500.

The window or door itself is a separate cost and can be substantial. Standard windows run $150 to $400 per window; impact-rated windows in hurricane zones cost 30 to 50 percent more. Labor for installation is typically a few hundred dollars per opening. If flashing or cladding repair is needed, add another $200 to $500.

Line item	Amount	Notes
Building permit (small, non-load-bearing opening)	$150–$300	Flat fee or percentage of project valuation. Fast plan review.
Building permit (large or load-bearing opening)	$300–$500	Higher fee due to structural review and inspections. More time required for plan review.
Structural engineer (if required)	$400–$1,200	Load-bearing walls require engineering for header sizing. Complex or seismic zones may exceed $1,500.
Window or door (standard, per opening)	$150–$400	Vinyl and aluminum typically least expensive. Wood and composite higher. Impact-rated windows add 30–50%.
Impact-rated window or door (hurricane zone)	$250–$700	Required in Florida HVHZ and other coastal high-wind areas. Mandatory, not optional.
Installation labor (per opening)	$200–$500	Includes framing, flashing, and finishing. More if cladding or drywall repair is needed.
Inspections (included in permit fee)	$0	Three inspections typical: framing, exterior cladding, final. No additional cost.

Common questions

If I'm just replacing an old window with a new one the same size, do I still need a permit?

No. Like-for-like window replacement — same opening size, same location — is typically exempt from permitting in most jurisdictions. The window-replacement rule follows a simpler path and is often permitted under a general exemption or a fast-track license-exemption category. However, if you're enlarging the opening, moving it, or changing from a window to a door, you need a full new-opening permit. If you're unsure whether your replacement qualifies as like-for-like, call the building department. They can answer in 60 seconds.

Do I need a permit if I'm just adding a window to a wall where there was never one?

Yes, always. Any new opening in any wall requires a permit, regardless of whether there was a previous opening there. The code treats it as structural work that requires plan review and inspections.

What's the difference between a header and a lintel?

In residential framing, the terms are used almost interchangeably. Technically, a lintel is a horizontal beam over an opening, and a header is the framing assembly that the lintel sits on. In practice, 'header' is the term you'll see in residential code and on permit plans. A header is typically made of wood (2x6, 2x8, 2x10, 2x12, or doubled), while a lintel can be steel or a laminated wood beam. Either way, it must be sized to handle the load above the opening.

Can I cut a new door opening without hiring a structural engineer?

It depends on whether the wall is load-bearing. If the wall doesn't carry load (it's an interior non-load-bearing wall), a contractor can often size the header using prescriptive sizing tables from the IRC and the permit will be approved without engineering. If the wall is load-bearing (exterior walls, or any wall that runs perpendicular to floor joists above), you need a structural engineer to calculate the header size. Don't guess. Call the building department and ask whether engineering is required for your wall and opening size. In most cases, if you're enlarging an opening or creating a new one in a load-bearing wall, engineering is required.

How long does it take to get a new window opening permit?

Plan on 2 to 4 weeks. If the opening is small and non-load-bearing, some jurisdictions will approve it over-the-counter (same day or next business day) if your plan is clear and complete. If the wall is load-bearing or if you need a structural engineer, add engineering time (typically 1 to 2 weeks). Plan review is usually 1 to 2 weeks once submitted. If the building department has questions or rejects your plan, you'll need to resubmit, which adds time. Submit a complete, clear plan the first time and you'll avoid delays.

What happens if I cut a new opening without a permit?

Several things. First, you've created a liability problem — your homeowner's insurance may not cover damage related to unpermitted structural work. Second, when you sell the home, a title company or inspector will likely discover the unpermitted opening and the sale can stall. Third, if there's ever a fire, injury, or structural failure, you're personally liable. Finally, the building department can issue a violation notice and order you to remove the opening, repair the wall, or obtain a retroactive permit (which is often more expensive and complicated than doing it right the first time). Don't skip the permit.

If I'm in a hurricane zone, are impact-rated windows mandatory?

In Florida's High Velocity Hurricane Zone (HVHZ) and other coastal high-wind areas, yes. The building code requires impact-resistant glazing and frames. You cannot use standard windows in these zones — the building department will not approve them. Impact-rated windows are rated to ASTM D3039 and are tested for impact resistance and pressure. They cost 30 to 50 percent more than standard windows but they are mandatory by code, not a choice. If you have any doubt whether you're in a required zone, check with your building department or the county assessor.

Do I need a permit to replace an exterior door if I'm keeping the same opening size?

No, not typically. Like-for-like door replacement (same opening size) follows the window-replacement exemption in most jurisdictions. However, if you're enlarging the opening, moving the door, or converting from a window to a door (or vice versa), you need a full new-opening permit. If the opening is the same size and you're just replacing the door unit, it's usually exempt — but call the building department to confirm.

What's an egress window and why does it matter for permits?

An egress window is a window large enough to allow a person to exit in an emergency. The IRC requires every bedroom to have at least one emergency exit — either a door or an egress window. The window must be at least 5.7 square feet (measured in the opening) in a basement and at least 10 square feet in other rooms. The sill height (the bottom edge of the window) must be no higher than 44 inches. If you're cutting a new window in a bedroom, the building department will check whether it meets egress requirements. If it's too small or the sill is too high, you'll need to enlarge it. This is common rejection reason, so measure carefully before you start.

Can a contractor pull the permit or do I have to do it myself?

A licensed contractor can pull the permit on your behalf. You don't need to pull it yourself. The contractor (or the GC, framing contractor, etc.) can submit the application, pay the fee, and handle the plan review and inspections. The building department will typically require a signed agreement between you and the contractor designating responsibility. If you're hiring a contractor, ask them whether they pull permits or if you need to pull it separately. Many contractors include permit-pulling as part of their service; others expect you to pull it and they just do the work.

Cities we cover for new windows permits

City-specific new windows permit guides with local fees, code editions, and building department contact info. Click your city for the local rules.

Florida

Ready to move forward?

Start with a 10-minute phone call to your local building department. Have your property address and a rough description of the opening ready. Ask three questions: (1) Is the wall load-bearing? (2) Will I need a structural engineer? (3) What's your permit fee for a new window or door opening? You'll get a straight answer and a sense of timeline. If you need a structural engineer, get a referral from the building department or a local contractor — most engineers can turn around a simple header calculation in 3 to 5 business days. Submit a complete plan the first time and you'll avoid resubmission delays. Plan on 2 to 4 weeks from submission to final inspection.

Related permit guides

Other guides in the Windows & doors category:

Do I need a permit for a new window or door opening?