What happens if you skip the permit (and you needed one)
- Stop-work order and $500–$1,500 fine from Kennesaw Building Department; contractor's license can be suspended if the roofer knowingly worked unpermitted.
- Your homeowner's insurance may deny a claim if it discovers unpermitted roof work during a water-damage investigation; you'll be stuck with the repair cost.
- Georgia Residential Property Disclosure Statement (RPDS) requires you to disclose unpermitted work to buyers; missing disclosure can trigger rescission or lawsuit within 1 year of closing.
- Mortgage refinance or equity-line approval blocked until permit is pulled retroactively and final inspection signed off — lenders require proof of permitted work for structural changes.
Kennesaw roof replacement permits — the key details
Under IRC R907 (adopted by Georgia State Building Code and enforced by Kennesaw), a permit is required for any reroofing project that involves removal of the existing roof covering — even a single-layer tear-off-and-replace. Kennesaw's ordinance does not carve out a local exemption for like-for-like material swaps. IRC R907.4 is the controlling rule: if the roof has three or more layers of covering, or if you are removing any layers, decking inspection is mandatory. A single-layer tearoff with deck inspection will trigger two inspections minimum: one after removal (to verify deck fastening and check for structural damage or rot) and one final. This is Georgia state-wide practice, not unique to Kennesaw, but Kennesaw's building department is particularly strict about documentation of deck condition and fastener spacing. If your inspector finds that the existing deck was not fastened per code (a common problem on older Kennesaw ranches built in the 1960s-80s), you may be required to sistering joists or reinforcing the deck — a cost surprise that shows up only after the tear-off.
The second critical layer is underlayment and secondary water barrier specification. IRC R905 requires underlayment under asphalt shingles in all climate zones, but Kennesaw is in Climate Zone 3A (warm-humid), which does not trigger the additional ice-and-water-shield requirement that applies in colder zones. However, if your roof pitch is less than 4:12, some inspectors interpret the IRC to require synthetic underlayment (not felt) for durability — check with Kennesaw Building Department before you order. Fastening pattern (nail type, spacing, and location per IRC R905.2) must be specified on the permit application or on the contractor's work plan; generic 'per manufacturer' language will not fly. Kennesaw inspectors are trained to verify fastening with a hammer pull-test on a random sample of nails during the final inspection, so undersized nails or improper spacing will be flagged and require rework.
Material changes — swapping asphalt shingles for metal, tile, or standing-seam — trigger additional scrutiny. If you are changing materials, Kennesaw will require a structural evaluation to confirm the roof deck and framing can support the new load. Tile and slate are significantly heavier than shingles (tile: 10-15 lbs/sq.ft. vs. shingles: 2-3 lbs/sq.ft.), and older Kennesaw homes (especially pre-1990 builds in neighborhoods like Cobb Parkway or Wildwood) often have undersized rafters. The structural engineer's report and signed-off deck repair estimate must be included in the permit application — you cannot pull the permit, start the tear-off, and then call for an engineer. Expect a 2-3 week delay if a structural component needs reinforcement. Metal roofing is lighter but still requires verification of fastening and underlayment compatibility with metal — many metal-roof failures in Georgia are caused by improper underlayment choice (synthetic under metal can trap moisture).
Kennesaw's permit portal is accessible through the city's main website; you can file online or in-person at City Hall (2755 Canton Road, Marietta — note that Kennesaw Building Department shares county facilities). For a standard full-roof replacement with no structural work, turnaround is 5-7 business days for plan review. If the inspector notes deficiencies on the permit (e.g., missing fastening spec or unclear deck repair scope), you will receive a 'Request for Information' email, and the clock restarts. Most contractors in the Kennesaw area are familiar with the city's process and will submit on your behalf; however, if you are owner-building under Georgia § 43-41, bring a photo of the current roof condition and a written scope of work (including square footage, materials, and underlayment type) to speed review. Kennesaw does not charge a separate inspection fee beyond the permit; the $150–$350 permit cost is all-in for plan review plus two inspections.
After permit issuance, the deck inspection must happen before the new covering goes down — schedule this immediately after tear-off is complete so the wood framing is protected during the inspection window. Kennesaw Building Department typically allows 48 hours notice for inspections. Once the deck is signed off, you can proceed with underlayment and fastening. The final inspection is conducted with the roof substantially complete (all fastening done, no overlap or edge gaps remaining). If the inspector finds missed nails or wrong fastening pattern, you will need to pull nails and redo it — this is not a 'close enough' inspection. Plan for the final to take 2-3 hours on-site. After sign-off, you will receive a Certificate of Occupancy or Permit Closed notice, which you should keep for your records in case of insurance claim or future sale.
Three Kennesaw roof replacement scenarios
Why Kennesaw inspectors check deck fastening so carefully (and what that means for your timeline)
Kennesaw's residential stock includes many 1960s-1980s ranch and colonial-style homes with roofs originally installed when fastening standards were looser than today's IRC. Rafters or trusses in homes built before 1980 often were face-nailed (hammered into the side of the wood) rather than toe-nailed (driven at an angle through the joint), and nail spacing was often 12-16 inches on center rather than the current 16-inch-maximum or 12-inch (for 4:12 pitch or steeper) required by IRC R905.2.5. When Kennesaw inspectors pop open a roof for deck inspection, they are checking: (1) nail count and pattern, (2) nail type (ring-shank or spiral-shank preferred for holding power; old smooth nails pop out), and (3) evidence of rot or water damage to the underlying framing.
If your home's deck was originally fastened at 20-inch spacing or with smooth nails, the inspector will not automatically fail the roof; however, you may be required to 're-nail' the deck (adding new fasteners at code spacing) before the new covering goes down. This is an unexpected cost — typically $500–$1,500 depending on roof area and whether sistering is needed. It is not part of the normal reroofing estimate. To avoid this surprise, ask your roofer to inspect the existing fastening pattern before pulling a permit and provide a 'deck condition and fastening assessment' to the building department with the permit application. Kennesaw staff will then flag any rework needed up front, so you are not surprised after the tear-off.
A second reason Kennesaw is stringent: Piedmont clay soils in the Kennesaw area are prone to foundation settling and differential movement, especially in older homes that lack adequate foundation drainage. Water ingress due to poor roof fastening can exacerbate interior rot and mold — Kennesaw's building department takes this seriously and wants to ensure new roofs are installed to current standards so they last 25+ years without leaks that will compromise the home's structural integrity.
Material choice and Georgia's warm-humid climate: synthetic vs. felt underlayment, and metal-roof moisture
Kennesaw is in Climate Zone 3A (warm-humid per IECC), with average summer temperatures in the 85-92°F range and high humidity year-round. Under current IRC R905 guidelines, asphalt-shingle roofs in warm-humid zones do not require ice-and-water shield (that is reserved for colder climates where ice dams are a risk). However, Kennesaw's Piedmont location can see occasional winter freezing, and the area is susceptible to heavy rain events (tropical storms, hurricanes) that can back-water into roof penetrations. Many Kennesaw inspectors and roofers recommend synthetic underlayment (polypropylene or polyester, ~$0.15–$0.25/sq.ft.) rather than felt (~$0.08–$0.12/sq.ft.) for improved moisture resistance and tear resistance during installation. Synthetic does not absorb water if exposed during a rainstorm mid-install, whereas felt can soak and sag. Kennesaw's building code does not mandate synthetic over felt for asphalt roofs in Zone 3A, but your permit application should specify which you are using.
Metal roofing is increasingly popular in Kennesaw due to durability and 25-year warranties, but metal under warm-humid conditions requires careful underlayment selection. Metal roofing CANNOT use permeable felt or asphalt-impregnated underlayment because metal and warm-humid air can trap condensation on the underside of the metal panels, leading to rust and framing rot. Kennesaw inspectors will reject a metal-roof permit if the underlayment is listed as 'felt' — it must be synthetic or a manufacturer-specified non-permeable product. This is not explicitly stated in Georgia code but is industry best practice and enforced by savvy Kennesaw building staff. Confirm the metal-roof manufacturer's underlayment requirement and include it in your permit documentation.
If your Kennesaw home has an attic (rather than a cathedral ceiling or conditioned attic), ensure the new roof underlayment installation includes adequate ventilation pathways — soffit vents and a ridge vent (or comparable continuous ventilation) are required by IRC R806 to prevent moisture accumulation. Many reroofing jobs in Kennesaw are done without adding soffit vents if they were missing in the original build; Kennesaw inspectors are increasingly calling this out as a deficiency during final inspection. If your home lacks soffit ventilation, plan to add it during the reroofing (roughly $1,000–$2,000 for venting material and labor) to avoid an inspection hold-up.
Kennesaw Building Department, 2755 Canton Road, Marietta, GA 30066 (shared with Cobb County facilities)
Phone: (770) 528-3800 (main); ask for Building Permits | https://www.kennesaw.gov/ — navigate to 'Permits' or contact building department for online portal access
Monday - Friday, 8:00 AM - 5:00 PM (EST)
Common questions
Do I need a permit if I just replace missing or damaged shingles on one side of my roof?
If the repair covers less than 25% of the total roof area and you are NOT removing any existing layers, you do not need a permit in Georgia / Kennesaw. However, if your roof has three or more existing layers (common in pre-1995 Kennesaw homes), any repair that involves removing shingles — even on one side — can trigger the three-layer tear-off rule (IRC R907.4), and you WILL need a permit for a full tear-off. Before you assume exemption, call Kennesaw Building Department and describe your roof's age and layer count. A 2-minute phone call saves the risk of a stop-work order.
Can I pull the roof replacement permit myself as an owner-builder, or do I need a licensed contractor?
Georgia Code § 43-41 allows you to pull a residential permit on your own home without a contractor license, so you CAN self-permit a roof replacement in Kennesaw. However, you must be the owner of record, and you will be responsible for all code compliance and inspections. Kennesaw's building department will still require the same plan documentation (materials, fastening pattern, underlayment type) as a contractor. Most homeowners choose to hire a licensed roofer (who pulls the permit as part of their bid) because the roofer is responsible for code compliance and warranty coverage. If you are owner-building, be prepared to spend 1-2 days preparing a detailed scope document and attending both inspections (deck and final).
What is Kennesaw's typical turnaround time for a roof replacement permit?
For a standard full-roof replacement with no structural changes (tear-off existing shingles, replace with like-for-like material), Kennesaw's plan review is typically 5-7 business days. If structural work is needed (e.g., sistering rafters for a metal roof) or if the city's initial review identifies deficiencies in the permit application, review can extend to 10-14 days. After the permit is issued, deck inspection typically happens within 1-2 days of tear-off (you call the building department and request inspection), and final inspection follows after shingles are fastened. Total elapsed time from permit pull to final inspection is usually 2-3 weeks.
If my roof has three layers, do I HAVE to tear off all of them, or can I overlay the new shingles on top?
IRC R907.4 (adopted by Georgia and enforced by Kensesaw) requires that if a roof has three or more existing layers of covering, you must remove ALL layers before installing new shingles. You cannot overlay (add another layer on top). This is a hard rule — inspectors are trained to verify via visual inspection of the roof edges or by popping a small section after tear-off. If you try to overlay on a three-layer roof without permit, the city can issue a stop-work order (fine $500–$1,500) and require removal of the unauthorized work. Plan on a full tear-off if your roof is three layers.
What if the roofer discovers rot in the roof deck after tear-off — does that change the permit cost?
Yes. If decay or structural damage is found during deck inspection, you will need to repair or replace the damaged framing before the new roof covering goes on. This is not covered under the original roofing permit and requires separate scope and inspection. Typical cost is $1,000–$5,000 depending on the area affected. The building department will flag it as a deficiency, and you must get a structural repair estimate and re-inspect before proceeding. This is why getting a pre-permit deck assessment from your roofer is valuable — you can anticipate and budget for repairs instead of discovering them mid-project.
Does Kennesaw require ice-and-water shield on a roof replacement even though we are in a warm climate?
No. Kennesaw is in Climate Zone 3A, and Georgia code does not mandate ice-and-water shield for this zone (it is required in colder zones like 5 and above). However, if your roof has a very low pitch (under 3:12) or if valleys are present, synthetic underlayment is often recommended as a prudent upgrade to enhance water resistance during rain events. Discuss this with your roofer and include the underlayment type in your permit application — you are not required to use ice-and-water shield, but if you choose to, specify it.
Can I start the tear-off before the permit is issued, or do I have to wait for approval?
You must wait. Work cannot legally begin until the permit is issued by Kennesaw Building Department. If you start tear-off before permit issuance, you risk a stop-work order and fines. Plan your contractor schedule so tear-off begins the day after permit issuance or later. Most contractors understand this and will coordinate with the city's permit timeline before giving you a start date.
If I change from asphalt shingles to metal roofing, does Kennesaw require an engineering report?
Yes, if there is any concern about the roof's structural capacity to support the new load. Metal roofing (even though lightweight) combined with fastening and structural changes means Kennesaw will typically require a structural engineer's report confirming that rafters/trusses are adequate. If your home is newer (post-1990) with engineered trusses, the structural engineer's review may confirm that no changes are needed. If your home is older with 2x6 or 2x8 rafters on 24-inch centers, reinforcement (sistering or collar ties) is often required, adding $2,000–$4,000 to the project. Include the structural engineer's report with your permit application to avoid delays.
What happens during the deck inspection, and how long does it take?
After tear-off, the building inspector visually examines the roof deck (the wood framing and sheathing) for rot, water damage, missing or inadequate fastening, and structural integrity. The inspector will measure fastening spacing, note nail type, and may pull a few nails to test holding strength. The inspection typically takes 1-2 hours for a single-story home, longer for a two-story. You (or your contractor) must be present. The inspection report will either approve the deck for new roof installation, note minor issues requiring re-nailing, or flag significant rot requiring structural repair. If rework is needed, the inspector will re-inspect after repairs are complete. Plan to schedule deck inspection within 24-48 hours of completing tear-off so the framing is not left exposed during rain.
Why does Kennesaw require a permit for a simple shingle-to-shingle replacement — isn't that just routine maintenance?
IRC R907 (adopted by Georgia) classifies any tear-off-and-replace as 'reroofing,' not routine maintenance or repair. The permit ensures the new roof is installed per current code standards, fastening patterns are correct, and structural deck is sound. Kennesaw uses the permit process to verify workmanship quality and to create a record of the work for future inspections, insurance claims, or home sales. While it feels like routine work, the code treats it as a structural alteration because the roofing attachment and deck condition are critical to the home's water-tightness and structural integrity. A permit protects you and the next owner.