50-State Building Permit Costs, Exemptions & Requirements (2026)
Determine whether your home remodeling project requires a building permit, calculate estimated city plan check and inspection fees, check state-specific shed and fence exemption size caps, and find direct links to municipal permitting portals.
Residential Remodeling Permit Rule: Under IRC § R105.2 and state residential building codes, permits are strictly required for structural modifications, additions, and trade alterations (electrical, plumbing, mechanical). Cosmetic renovations—including painting, finish flooring, and one-story detached storage sheds under 200 sq ft (120 sq ft in CA/FL)—are legally exempt. Permit fees typically average 1.0%–1.8% of total project valuation.
Building Permit Cost & Requirement Estimator
Estimate municipal building permit fees, plan check review costs, and inspection requirements by project valuation.
Estimated Municipal Permit Fees (Los Angeles, CA)
Building Permit Laws: IRC § R105.2 Exemptions vs. Mandatory Permits
In the United States, residential building safety is regulated at the municipal and county level, primarily adopting models established by the International Code Council (ICC) through the International Residential Code (IRC). Understanding what is legally exempt versus what requires a permit protects your investment, insurance coverage, and resale value.
What Remodeling Projects Are Typically Permit-Exempt?
Under Section R105.2 of the International Residential Code, the following residential improvements do not require building permits in most U.S. jurisdictions (unless located in a historic preservation district or environmentally sensitive flood zone):
- Cosmetic Interior Finishes: Painting, wallpapering, tiling, carpeting, custom built-in cabinetry, and countertop replacement where no plumbing or electrical fixtures are relocated.
- Detached Storage Sheds: One-story detached accessory structures used as tool and storage sheds, playhouses, and similar uses, provided the floor area does not exceed 200 square feet (or 120 sq ft in California and Florida) and no electrical or plumbing utilities are installed.
- Fences: Privacy fences not over 6 feet (or 7 feet in certain states) in height.
- Retaining Walls: Retaining walls that are not over 4 feet in height measured from the bottom of the footing to the top of the wall, unless supporting a surcharge.
- Water Features & Prefab Pools: Prefabricated swimming pools that are less than 24 inches deep and installed entirely above ground.
- Window Swaps in Same Opening: Direct replacement of windows with the same dimensions, rough opening, and header structural framing.
50-State Building Code Standards & Exemption Matrix
| State | Governing Building Code | Shed Limit | Fence Limit | Major Metro Portal | Guide |
|---|---|---|---|---|---|
| Alabama | Alabama Energy and Residential Codes | 200 sq ft | 7 feet | Birmingham (City) | Details → |
| Alaska | Alaska Building Code & Northern Climate IRC Amendments | 200 sq ft | 6 feet | Anchorage (Municipality) | Details → |
| Arizona | Arizona Residential Code | 200 sq ft | 6 feet | Phoenix (City) | Details → |
| Arkansas | Arkansas Fire Prevention Code & Residential Code | 200 sq ft | 7 feet | Little Rock (City) | Details → |
| California | 2024 California Building Standards Code | 120 sq ft | 6 feet | Los Angeles (Los) | Details → |
| Colorado | Colorado Model Energy Code & Local Home Rule Building Standards | 200 sq ft | 6 feet | Denver (Denver) | Details → |
| Connecticut | 2022/2026 Connecticut State Building Code | 200 sq ft | 7 feet | Hartford (City) | Details → |
| Delaware | Delaware Energy and Residential Code Standards | 200 sq ft | 7 feet | Wilmington (City) | Details → |
| District of Columbia | DC Construction Codes | 100 sq ft | 7 feet | Washington (Department) | Details → |
| Florida | 8th Edition | 120 sq ft | 6 feet | Miami (Miami-Dade) | Details → |
| Georgia | Georgia State Minimum Standard Codes | 200 sq ft | 6 feet | Atlanta (City) | Details → |
| Hawaii | Hawaii State Building Codes & County Specific Building Ordinances | 120 sq ft | 6 feet | Honolulu (City) | Details → |
| Idaho | Idaho Residential Code | 200 sq ft | 6 feet | Boise (City) | Details → |
| Illinois | Illinois Residential Code Standards & Chicago Building Code | 150 sq ft | 6 feet | Chicago (City) | Details → |
| Indiana | Indiana Residential Code | 200 sq ft | 6 feet | Indianapolis (Department) | Details → |
| Iowa | Iowa State Building Code | 200 sq ft | 6 feet | Des Moines (City) | Details → |
| Kansas | Kansas Local Residential Standards | 200 sq ft | 6 feet | Wichita (Metropolitan) | Details → |
| Kentucky | Kentucky Residential Code | 200 sq ft | 7 feet | Louisville (Louisville) | Details → |
| Louisiana | Louisiana State Uniform Construction Code | 150 sq ft | 6 feet | New Orleans (City) | Details → |
| Maine | Maine Uniform Building and Energy Code | 200 sq ft | 6 feet | Portland (City) | Details → |
| Maryland | Maryland Building Performance Standards | 200 sq ft | 6 feet | Baltimore (Baltimore) | Details → |
| Massachusetts | 9th/10th Edition Massachusetts State Building Code | 200 sq ft | 7 feet | Boston (City) | Details → |
| Michigan | Michigan Residential Code | 200 sq ft | 6 feet | Detroit (City) | Details → |
| Minnesota | Minnesota State Building Code & Energy Code | 200 sq ft | 7 feet | Minneapolis (City) | Details → |
| Mississippi | Mississippi Building Codes Council Standards | 200 sq ft | 7 feet | Jackson (City) | Details → |
| Missouri | Missouri Local Residential Codes | 200 sq ft | 6 feet | Kansas City (City) | Details → |
| Montana | Montana State Building Code | 200 sq ft | 6 feet | Billings (City) | Details → |
| Nebraska | Nebraska Building Assessment Standards | 200 sq ft | 6 feet | Omaha (City) | Details → |
| Nevada | Southern/Northern Nevada Building Codes | 200 sq ft | 6 feet | Las Vegas (Clark) | Details → |
| New Hampshire | New Hampshire State Building Code | 200 sq ft | 6 feet | Manchester (City) | Details → |
| New Jersey | New Jersey Uniform Construction Code | 200 sq ft | 6 feet | Newark (City) | Details → |
| New Mexico | New Mexico Residential Building Code | 200 sq ft | 6 feet | Albuquerque (City) | Details → |
| New York | New York State Uniform Fire Prevention and Building Code & NYC Construction Codes | 144 sq ft | 6 feet | New York (New) | Details → |
| North Carolina | North Carolina Residential Code | 200 sq ft | 6 feet | Charlotte (Mecklenburg) | Details → |
| North Dakota | North Dakota State Building Code | 200 sq ft | 6 feet | Fargo (City) | Details → |
| Ohio | Residential Code of Ohio | 200 sq ft | 6 feet | Columbus (City) | Details → |
| Oklahoma | Oklahoma Uniform Building Code Commission | 200 sq ft | 6 feet | Oklahoma City (City) | Details → |
| Oregon | Oregon Residential Specialty Code | 200 sq ft | 7 feet | Portland (City) | Details → |
| Pennsylvania | Pennsylvania Uniform Construction Code | 200 sq ft | 6 feet | Philadelphia (Department) | Details → |
| Rhode Island | Rhode Island State Building Code | 200 sq ft | 6 feet | Providence (City) | Details → |
| South Carolina | South Carolina Residential Building Code | 200 sq ft | 7 feet | Charleston (City) | Details → |
| South Dakota | South Dakota Local Residential Standards | 200 sq ft | 6 feet | Sioux Falls (City) | Details → |
| Tennessee | Tennessee State Building Code Standards | 200 sq ft | 6 feet | Nashville (Metro) | Details → |
| Texas | Texas Local Government Code § 214.212 & Municipal IRC Standards | 200 sq ft | 7 feet | Houston (Houston) | Details → |
| Utah | Utah Uniform Building Standards Act | 200 sq ft | 6 feet | Salt Lake City (Salt) | Details → |
| Vermont | Vermont Residential Building Energy Standards | 200 sq ft | 6 feet | Burlington (City) | Details → |
| Virginia | Virginia Uniform Statewide Building Code | 256 sq ft | 6 feet | Richmond (City) | Details → |
| Washington | Washington State Residential Code | 200 sq ft | 6 feet | Seattle (Seattle) | Details → |
| West Virginia | West Virginia State Building Code | 200 sq ft | 6 feet | Charleston (City) | Details → |
| Wisconsin | Wisconsin Uniform Dwelling Code | 200 sq ft | 6 feet | Milwaukee (City) | Details → |
| Wyoming | Wyoming State Building Standards | 200 sq ft | 6 feet | Cheyenne (City) | Details → |
The 4 Critical Risks of Performing Unpermitted Remodeling Work
Homeowners often attempt to skip permits to save time and fees. However, building officials and real estate attorneys warn that unpermitted construction exposes property owners to massive financial liabilities:
- Insurance Claim Denial: If an unpermitted electrical wiring job causes a house fire, or unpermitted plumbing causes a major flood, your homeowners insurance policy typically has an exclusion clause allowing the carrier to deny 100% of the damage claim.
- Mandatory Teardown or Destructive Inspection: If code enforcement receives a complaint, the city will issue a Stop Work Order. Inspectors can legally mandate cutting open finished drywall, digging up concrete slabs, or tearing down unpermitted additions at the homeowner’s expense.
- Double or Quadruple Penalty Fees: Municipalities assess investigation penalty fees that double or quadruple the standard permit fee when work is discovered without a permit.
- Failed Real Estate Sales & Appraisals: During buyer home inspections and appraisals, unpermitted square footage (such as basement bedrooms or garage conversions) cannot be counted in the official living area. Buyers routinely demand price concessions or walk away from the purchase.
State-by-State Building Permit & Code Guides
Select your state for local fee schedules, shed size exemptions, mandatory inspection milestones, and city portal direct access:
Frequently Asked Questions: Remodeling Permits & Inspections
Do I need a building permit for interior remodeling?
If you are performing purely cosmetic work (painting, tiling, replacing flooring, or swapping cabinets in the exact same footprint without altering plumbing or electrical wiring), you generally do not need a permit under IRC § R105.2. However, moving walls, modifying load-bearing structures, adding new circuits/subpanels, or altering plumbing supply and drain lines strictly requires permits.
How much does a residential building permit cost on average?
Permit fees are typically based on total project valuation (labor + materials). Minor trade permits (water heater, 200A panel upgrade) range from $75 to $250. Major renovations (kitchen remodel, room addition) range from $400 to $2,500+ depending on the municipality and whether plan review check fees are added.
What size shed can I build without a permit?
Under the standard International Residential Code (IRC § R105.2), one-story detached accessory structures (tool and storage sheds, playhouses) up to 200 square feet are permit-exempt. However, some states and cities impose stricter limits: California and Florida cap exempt sheds at 120 square feet, while Virginia allows up to 256 square feet.
What happens if I remodel my home without a permit?
Consequences include immediate Stop Work Orders, penalty fees equal to double or triple standard permit costs, mandatory destructive inspection (cutting open finished walls to inspect rough wiring/pipes), denial of homeowners insurance claims for fire or water damage, and mandatory disclosures that can kill a future home sale or require price reductions.