Permit type guide · ranked #13 nationally
Deck & patio permits — complete guide (2026)
Required when the deck is over 30 inches above grade or attached to the house. One of the most commonly skipped permits — and one of the most commonly flagged during home sales.
National avg: $150–$600
Approval: 1–3 weeks
All 50 states
#13 by volume
~100KIssued annually
$150–$600National avg cost
1–3 weeksTypical approval
~1%Share of all permits
A deck permit is required if your deck is attached to the house OR elevated more than 30 inches above grade. Ground-level, freestanding patios under 200 sq ft generally do not require a permit in most jurisdictions. Skipping this permit is one of the top red flags in home sales.
When you need a deck permit
| Work type | Permit required? | Notes |
|---|---|---|
| Deck attached to house (any height) | Always | Ledger board connection to structure |
| Deck over 30 inches above grade | Always | Fall protection required |
| Deck with electrical (lights, outlets) | Always | Electrical permit also required |
| Deck with hot tub | Always | Structural + electrical load |
| Ground-level freestanding patio | Usually not | Under 200 sf, no attachment |
| Concrete patio (ground level) | Usually not | No structural attachment |
How to get a deck permit — step by step
1
Draw a site plan
Show the deck location relative to property lines, the house, and any easements. Include dimensions and height above grade.
2
Prepare structural plans
Most jurisdictions require footing size, post size, beam size, joist spacing, and ledger attachment details. Use the American Wood Council's free deck span tables.
3
Submit for permit
Online or in-person. Deck permits typically take 1–3 weeks for plan review in most jurisdictions.
4
Footing inspection
Before pouring concrete footings, schedule an inspection. Inspector verifies footing depth (below frost line) and diameter.
5
Framing and final inspection
Some jurisdictions require a framing inspection before decking is installed. Final inspection checks guardrails, stair handrails, and ledger connections.
Cost by project type
| Project | Permit fee range | Typical timeline |
|---|---|---|
| Ground-level deck (200 sf) | $150–$300 | 1–2 weeks |
| Elevated deck (200–400 sf) | $200–$450 | 1–3 weeks |
| Large deck (400+ sf) | $300–$600 | 2–4 weeks |
| Deck with hot tub pad | $250–$500 | 2–3 weeks |
| Second-story deck | $300–$600 | 2–4 weeks |
Frequently asked questions
What is the 30-inch rule for decks?
Most building codes require a permit and guardrails for any deck surface more than 30 inches above the grade below. This is measured at the lowest point.
Will a deck without a permit affect my home sale?
Almost certainly yes. Home inspectors flag unpermitted decks routinely. Buyers will either require the permit to be pulled retroactively (expensive) or negotiate a price reduction.
What is a ledger board?
A ledger board is a horizontal board attached to the house that supports one end of the deck. Ledger attachment to the house structure always requires a permit and specific fastener requirements.
Do I need a permit for a floating deck?
A floating deck (freestanding, not attached to the house, under 30 inches high) often does not require a permit in most jurisdictions. Verify locally — some cities require permits for any deck.
Data sources: Shovels.ai national permit aggregator · US Census Bureau BPS · IRC/IBC 2024