When a deck needs a permit
Most cities permit a deck once it clears a size threshold, usually measured in square feet, or a height threshold, measured in inches above grade. A low deck built right at ground level often skips the permit process in many jurisdictions, while anything attached to the house, built over a certain height, or large enough to need footings typically does not.
The exact numbers differ by city: some set the bar at 30 inches above grade, others at 200 square feet, and a few cities use both measures together. Structural attachment to the house is the detail inspectors ask about first, because an attached deck pulls load into the house framing and triggers a structural review that a freestanding deck of the same size might not need.
What a deck permit costs
Fees for a residential deck permit typically run from a flat minimum charge for small projects up to several hundred dollars for larger decks with multiple inspections. Plan review, if your city requires it for decks over a certain size, usually adds a separate line item on top of the base permit fee.
Expect the total to scale with square footage and with how many trades are involved, since adding a staircase, built-in seating, or an electrical run for exterior lighting can each carry its own line item.
How long review takes
A simple over-the-counter deck permit can clear in a single visit in cities with same-day review for small residential projects. Decks that need engineered plans, because of height, span, or attachment to an upper floor, typically sit in a plan review queue for one to several weeks before a permit is issued.
After the permit is issued, you still need an inspection, sometimes two for footing and final, before the project is considered closed out.
What varies from city to city
The deck size and height thresholds that trigger a permit are set locally, so a deck that needs no paperwork in one city can require a full permit two states over. Setback rules governing how close a deck can sit to a property line, railing height requirements, and whether a ledger board attachment needs an engineer's letter all vary by jurisdiction too.
Code edition matters as well: a city on a newer edition of the residential building code may require guardrails or footing depths that an older-code city does not.
What happens if you skip it
Building a deck without a required permit puts the burden on you later: a home sale, insurance claim, or neighbor complaint can trigger a records check, and an unpermitted deck can hold up closing until it is either permitted after the fact or removed.
Retroactive permitting, sometimes called an as-built permit, usually costs more than doing it up front, since the city may require you to expose framing for an inspection that would otherwise have happened during construction. Some cities also charge a penalty fee on top of the standard permit cost for work done without one.
Find your city
Deck permit guides by city
AL
AZ
CA
- Los Angeles, CA: Deck permit guide
- Sacramento, CA: Deck permit guide
- San Diego, CA: Deck permit guide
- San Francisco, CA: Deck permit guide
- San Jose, CA: Deck permit guide
CO
DC
FL
- Jacksonville, FL: Deck permit guide
- Miami, FL: Deck permit guide
- Orlando, FL: Deck permit guide
- Tampa, FL: Deck permit guide
GA
IL
IN
KY
LA
MA
MD
MI
MN
MO
NC
NM
NV
OH
OK
OR
PA
TN
TX
- Austin, TX: Deck permit guide
- Dallas, TX: Deck permit guide
- Fort Worth, TX: Deck permit guide
- Houston, TX: Deck permit guide
- San Antonio, TX: Deck permit guide
UT
VA
WA
WI
Compare across cities
FAQ
Common deck permit questions
Do I need a permit to build a deck?
In most cities, yes, once the deck clears a size or height threshold set by local code. A small, low deck built right at grade is the main exception, and the threshold itself is set city by city.
How much does a deck permit cost?
Expect a base fee tied to project size, plus a plan review charge in cities that require engineered plans for decks over a certain size. See the city guides below for the specific range in your area.
Does an attached deck need a different permit than a freestanding one?
Often, yes. An attached deck pulls structural load into the house framing, so many cities require an engineer's letter or additional plan review that a freestanding deck of the same size does not.
How long does deck permit review take?
A small deck with no engineered plans can often be approved same day at the counter. A larger or attached deck that needs plan review commonly takes one to several weeks before the permit is issued.
What happens if I build a deck without a permit?
You can face a stop-work order, a retroactive permit requirement with exposed-framing inspections, and in some cities a penalty fee. An unpermitted deck can also complicate selling the house later.
Disclaimer: Informational only, not legal advice. Rules change. Verify with your city's permitting staff before you build.