Do I Need a Permit to Replace a Roof?

A roof replacement is one of the largest exterior projects most homeowners take on, and in most of the US it needs a building permit. The roof keeps water out of the structure, resists wind uplift, and in many areas carries snow loads, so building departments want to confirm that the new covering, underlayment, and flashing are installed to code.

Unlike decks, fences, and sheds, reroofing is not on the model building code’s list of permit-exempt work. What varies locally is where a small repair ends and a permit-requiring reroof begins. To find the rules for your address, find your local building department.

What the model code says

The International Residential Code (IRC) requires a permit to construct, alter, or repair a building unless the work is specifically exempt (R105.1). Section R105.2 lists the exemptions, and roof replacement isn’t one of them. Section R105.2.2 allows ordinary repairs without a permit, but excludes structural work, such as cutting or removing a beam or load-bearing support, from that category.

The technical requirements for reroofing are in Chapter 9 of the IRC. Some of the most practical ones:

• Tear-off vs. roof over. A roof replacement means removing existing coverings down to the roof deck (R908.3). A recover, meaning a new covering over the old one, is not allowed when the existing roof has two or more layers, is water-soaked or deteriorated, or is slate, clay, cement, or asbestos-cement tile (R908.3.1.1). In other words, the model code generally allows at most one roof over.
• Reusing materials. Sound slate, clay, or cement tile may be reinstalled, but rusted or damaged flashings, edgings, and vents that are part of the assembly must be replaced (R908.5).
• Underlayment and ice barriers. Underlayment must meet the standards for the roof covering (R905.1.1). In areas with a history of ice forming along the eaves, an ice barrier is required (R905.1.2).
• Flashing and drip edge. Flashing is required at wall and roof intersections, changes in slope, and penetrations (R903.2), and shingle roofs need a drip edge at eaves and rakes (R905.2.8.5).
• Manufacturer instructions. Roof coverings must be installed according to the code and the manufacturer’s instructions (R904.1, R905.1), including fastening for the local wind loads.
• Energy code. A roof recover doesn’t have to meet new-construction insulation levels, but where a roof has no insulation in the cavity and the sheathing or insulation is exposed during reroofing, the roof must be insulated above or below the sheathing (N1111.1.1).

States and cities amend these rules. Coastal and hurricane-prone areas often have stricter fastening, underlayment, and inspection requirements. Some places require full tear-off for every reroof, and some have energy code requirements, such as reflective roofing or added insulation, that apply when a roof is replaced.

When you usually need a permit

Expect to need a permit when:

• You’re replacing the entire roof covering, with or without a tear-off.
• You’re replacing more than the local repair threshold. Some jurisdictions express this as a percentage of the roof area or a square footage.
• You’re replacing or repairing roof sheathing, rafters, or trusses.
• You’re changing roofing material, especially to a heavier one such as tile or slate, which can require a structural review.
• You’re adding or relocating skylights, roof vents, or other penetrations.
• The house is in a historic district, where the material and color may also need design approval.
• You’re installing solar panels, which require their own permits. See our solar permit guide.

Work that is often exempt

Depending on local rules, these commonly need no permit:

• Replacing a few damaged shingles or tiles in kind.
• Sealing minor leaks or resealing flashing.
• Cleaning gutters and replacing gutters without changing drainage (some places regulate where downspouts discharge).
• Applying approved coatings to some low-slope roofs (some jurisdictions do require a permit).

If storm damage is extensive, call the building department before assuming the work counts as a repair. After major storms, many departments issue guidance on what qualifies as an emergency repair and how quickly a permit must follow.

How the rules differ by city

The line between a repair and a permit-requiring reroof is drawn locally. Some examples from official sources:

• Denver requires a roof permit for new roofs, any repair covering more than 10 percent of the roof or two roof squares (whichever is smaller), and new roof penetrations such as skylights or solar. Roof permits are issued as “quick permits” without plan review, but structural changes go through full review, and roofs on landmarks or in historic districts need Landmark Preservation approval first. The building permit fee table on Denver’s Development Fees page (as posted in October 2026) charges $35 for work valued $501 to $2,000, and $35 plus $8 for each $1,000 above $2,000 for work valued up to $25,000, with plan review at 50 percent of the permit fee above $2,000.
• Seattle doesn’t require a permit for re-roofing one- and two-family homes and townhouses as long as the building envelope doesn’t change other than adding or replacing insulation of equal or better value. Re-roof permits are aimed at commercial and multifamily buildings, where SDCI charges a flat fee of half its base fee plus the state surcharge.
• Austin exempts asphalt shingles replacing asphalt shingles, other roof covering replacements that don’t affect the roof structure, and roof decking repairs up to 128 square feet. The exemption doesn’t apply in the Wildland-Urban Interface area when 50 percent or more of the roofing is being replaced.
• Fairfax County, Virginia lists replacement of roof shingles, and replacement of less than 256 square feet (9 boards) of roof plywood, as work that doesn’t need a permit, unless the plywood must be fire rated, as on townhouses. Its list of work that does need a permit includes “roof repairs” as miscellaneous work, so ask where the county draws the line for your project.
• Florida handles reroofing through state law as well as local permits. Section 553.844 of the Florida Statutes directs the Florida Building Code to include wind-mitigation techniques for older site-built homes, such as secondary water barriers and roof-to-wall connections when they can be done for about 15 percent of the reroof cost. It also says that if an existing roof was built to the 2007 Florida Building Code or later and 25 percent or more is being repaired, replaced, or recovered, only that portion has to meet the current code. In Pinellas County, a licensed contractor, engineer, architect, or inspector signs an inspection affidavit for roof-deck nailing and secondary water barrier work.

What the inspection covers

Roofing inspections vary more than most residential inspections. Common checkpoints include:

1. Sheathing or deck inspection. After tear-off, the inspector may check the condition of the roof deck, sheathing nailing, and any replaced boards before underlayment goes on.
2. In-progress or underlayment inspection. Some departments inspect the underlayment, ice barrier, and flashing before the roof covering conceals them, particularly in high-wind areas.
3. Final inspection. The inspector checks the finished roof, flashing at walls and penetrations, ventilation, drip edge where required, and that the product matches the approved permit.

Some departments do only a final inspection for routine shingle reroofs and rely on photos or manufacturer documentation for concealed work. Ask your department what to expect so your roofer doesn’t cover work that needed to be seen.

What to have ready when you apply

Many departments handle residential reroofing with a simple application or an over-the-counter permit. You may be asked for:

• The property address and a description of the work, including roof area (often in “squares” of 100 square feet).
• Existing and new roofing material, and whether you are tearing off or roofing over.
• Product information such as the shingle manufacturer, product listing or approval number, and installation instructions.
• Underlayment and fastening details, especially in high-wind areas.
• Structural information if you’re switching to a heavier roof or replacing framing.
• Contractor license number and insurance information if a contractor is doing the work.
• Notice of commencement or similar lien-law documents, required in some states before work starts.

Before work starts, a short checklist:

• Ask the department where the repair threshold is (a percentage, a number of squares, or square feet of decking).
• Count the existing layers to decide between a tear-off and a recover.
• Get the product’s installation instructions and any state product approval number.
• Plan for sheathing replacement, and find out whether replaced sheathing or exposed insulation triggers an inspection or energy code upgrade.
• Confirm the contractor’s license and insurance, and that the permit is in the contractor’s name.
• Check historic district and HOA rules before choosing a material or color.

Hiring a contractor vs doing it yourself

Most roof replacements are done by contractors, and the contractor normally pulls the permit. Licensing rules vary widely. Some states license roofing contractors specifically, some require a general residential contractor license, and some leave licensing to cities. Before hiring:

• Confirm the contractor’s license with your state or city.
• Ask for proof of liability and workers’ compensation insurance.
• Make sure the permit is in the contractor’s name, not yours, unless you are acting as owner-builder.
• Don’t make the final payment until the final inspection has passed.

Homeowners can usually pull their own permit for a reroof on their own home. See our guide to owner-builder permits for typical conditions. Roof work is dangerous, so plan for fall protection if you do it yourself.

Other things to check

• Asbestos and lead. Older homes may have roofing or flashing materials that contain asbestos. If you suspect it, have materials tested before disturbing them and follow your state’s rules for removal.
• Ventilation. Enclosed attics and rafter spaces need cross ventilation (R806.1). A new roof is a good time to confirm attic ventilation meets the code and the shingle manufacturer’s warranty requirements.
• HOA rules. Covenants often limit roofing materials and colors.
• Insurance. Some insurers offer discounts for roofs built to higher wind standards, such as the IBHS FORTIFIED program. Keep your permit, inspection records, and product documentation.

Questions to ask your building department

• At what point does a roof repair become a reroof that needs a permit?
• Is a roof over allowed, or is tear-off required?
• Which inspections are required, and at what stage?
• Are there local wind, ice barrier, or energy code requirements?
• Does a historic district or design review apply to my house?

If a past roof replacement was done without a permit, our guide to unpermitted work explains your options. For more about inspection timing, see building inspection stages.