How Much Does a Building Permit Cost?
A permit for a water heater swap can cost less than $100, while a permit for a new house can run into the thousands. The wide range comes from how cities calculate fees: most use your project's valuation, some use flat fees, and nearly all add separate charges for plan review and trade permits. This guide breaks down the typical ranges so you can budget before you apply.
Building permit fees are usually based on the project's valuation and typically run $150 to $2,000 for residential work: small trade permits like water heater swaps cost $50 to $150, remodels run $200 to $800, additions cost $500 to $2,000, and new homes can exceed $1,500. Plan review fees and separate electrical, plumbing, and mechanical permits add to the total.
How cities calculate permit fees
Most cities use one of two systems, and many use a blend of both. A valuation-based fee charges a percentage of the project's declared construction value, often on a sliding scale that drops as the project gets bigger. A flat fee charges the same amount for a given permit type no matter the project size. Either way, there is usually a minimum fee, and the total almost always includes a plan review fee (often 50 to 65 percent of the permit fee) plus separate trade permits for electrical, plumbing, and mechanical work.
That structure explains why two projects with the same permit can cost different amounts. The permit office rechecks your valuation against its own cost tables, and if the office thinks your number is low, it raises it. Contractors fold permit costs into their quotes, so DIYers who pull their own permits typically pay only the city's fees.
Typical fees by project type
These are common ranges from city fee schedules across the US. Your city may be higher or lower, and dense coastal cities skew above these numbers.
Water heater swap or single trade permit: $50 to $150. Many cities issue these over the counter, same day.
Re-roof (single-family): $150 to $400, often a flat fee.
Deck: $150 to $500 depending on size and whether it attaches to the house.
Bathroom remodel: $200 to $800 when plumbing and electrical are involved, plus separate trade permits.
Basement finish: $300 to $1,000 based on square footage and the trades involved.
Room addition: $500 to $2,000, driven by valuation and plan review.
Garage (detached): $300 to $900.
New single-family home: $1,500 to $5,000 or more, before impact fees. School, park, and utility impact fees can add thousands on top of the permit itself in growth areas.
Keep in mind that the permit fee is rarely the whole bill. Plan review, inspections (most permits include a set number; extra re-inspections often cost $50 to $150 each), and separate trade permits stack on top.
What raises the price
Four things push a permit above the base range. First, project valuation: every fee table scales with it, so be honest but do not inflate your declared value. Second, plan review rounds: if your plans come back with corrections, some cities charge for each re-review. Third, scope creep: adding work mid-project means amending the permit, and amendments usually carry their own fee. Fourth, working without a permit: investigation fees routinely double the normal fee, and fines can run far higher. Cincinnati charges an investigation fee equal to the regular permit fee, and Washington DC fines up to $2,000 per infraction.
Real examples from city offices
St. Louis charges a $25 application fee and then bases the permit fee on estimated project cost. Orlando requires a Notice of Commencement, filed with the county, for projects valued over $5,000, which adds a small recording cost. Charlotte's county permit office notes that residential work valued at $40,000 or less may not need a permit at all unless it touches load-bearing structure, plumbing, HVAC, or electrical design, which effectively exempts many small jobs from fees entirely. These are illustrations, not quotes: always check your own city's current fee schedule before budgeting.
How to keep permit costs down
Bundle related work into one permit application instead of pulling separate permits months apart; you pay one plan review fee instead of two. Submit complete, legible plans the first time to avoid re-review charges. If you are a homeowner, check whether your city lets owners pull their own permits (most do for owner-occupied single-family homes), which skips the contractor markup some builders add to permit fees. And apply before you start work: the cheapest permit is the one you get before a violation, not after.
This is general information about common fee structures, not a quote and not legal advice. Fee schedules change, so confirm the current numbers with your local permit office before you budget.
Find your local permit office
Fees vary by city, so the first step is finding the office that sets them. Our free lookup shows the official permit office for 48 US metros and that office's own published rules.
Building permit cost questions
How much is a building permit on average?
Most residential building permits cost $150 to $2,000. Small trade permits like a water heater swap run $50 to $150, a bathroom remodel runs $200 to $800, an addition runs $500 to $2,000, and a new single-family home can exceed $1,500 in permit fees before impact fees. The total includes the permit fee, plan review, and any separate trade permits.
How much does a building permit cost for a shed?
Shed permits, where required, are usually inexpensive: $50 to $200 in most cities. Many cities exempt small sheds entirely, often under 120 to 200 square feet depending on the jurisdiction, so a small storage shed may need no permit and no fee at all. Check your city's exemption threshold first.
How much does a building permit cost for a deck?
Deck permits typically run $150 to $500. A small detached deck under 200 square feet and 30 inches above grade is exempt in many cities, while a larger attached deck with stairs and railings needs full plan review and costs toward the top of the range.
Are permit fees based on square footage?
Some cities use square footage and some use project valuation; both are common. Valuation-based schedules are the most widespread, charging a sliding-scale percentage of the declared construction cost. Flat-fee schedules are typical for simple trade permits like re-roofs and water heater replacements.
Can a homeowner pull their own building permit to save money?
Yes, in most US cities a homeowner can pull permits for their own owner-occupied single-family home, which avoids the markup some contractors add to permit fees. You take on the responsibility for the work meeting code and for scheduling inspections. Some cities require owners to pass a short competency check or sign an affidavit, and commercial work almost always requires a licensed contractor.