Do I Need a Permit to Build a Deck or Patio Cover in LA?
It depends on size and height. A deck needs an LA permit if it is attached, over 30 inches high, or over 200 sq ft. Attached patio covers always need one; ground-level patios usually do not.
- A deck needs an LADBS permit if it’s attached to the house, over 30” above grade, or over 200 sq ft.
- A low, small, freestanding deck that meets none of those triggers can be exempt — but most real decks hit at least one.
- Ground-level concrete patios (≤30” above grade, not over a basement) are generally exempt — no permit to pour a simple slab.
- Patio covers: attached covers always need a permit; detached covers need one over 120 sq ft.
- Straightforward patio covers often qualify for an Express Permit issued the same day via PermitLA.
- LA is in Seismic Design Category D, so deck and cover foundations and connections must be designed for earthquake forces.
- When a permit is required, skipping it triggers a $356 fee under LAMC §98.0421 plus retroactive permitting at 2× under LAMC §91.107.5.1.
The three triggers that decide it
For a deck, the permit question comes down to three simple tests. If any one is true, you need a permit:
- Is it attached to the house? Attached decks are always permitted, because they tie into the home’s structure.
- Is it more than 30 inches above grade? Above 30”, a fall becomes dangerous — so LA requires a permit and code-compliant guardrails.
- Is it larger than 200 square feet? Past that size, it’s a permit regardless of height.
A small, low, freestanding deck that misses all three can be exempt. But in practice, most decks people actually want — attached to the back of the house, or raised to meet a doorway — trip at least one trigger.
Patios and patio covers follow different rules
Ground-level patio (concrete flatwork): a simple slab at grade — no more than 30” above grade and not over a basement — is generally exempt. You can usually pour a backyard patio without a permit.
Patio cover: this is where people get caught. Any cover attached to the house needs a permit. A detached cover needs one once it’s larger than 120 square feet. The good news: straightforward patio covers are often eligible for the Express Permit, issued the same day with no plan check.
Not sure if your deck or cover needs a permit?
Use the Permit360 scope guide — tell us the height, square footage, and whether it’s attached, and we’ll tell you whether you need a permit, whether it’s Express or Standard, and what it’ll cost.
How much the permit costs (real 2026 numbers)
- Deck or patio-cover permit (valuation-based): typically ~$150–$400
- State surcharges + issuance: ~$50
- Approximate permit total: $200–$500
An elevated or large deck that needs engineered drawings and a structural plan check costs more and takes longer. Use the Permit360 fee calculator for an estimate tied to your project, and see how much an LADBS building permit costs in 2026 for context.
How long the permit takes
Express Permit (simple patio cover): same day through PermitLA, inspection after the build.
Standard permit (attached or elevated deck needing drawings): 1–3 weeks for issuance assuming no corrections, longer if engineering is required.
What happens if you skip the permit
- Code Violation Inspection Fee. Under LAMC §98.0421, unpermitted deck or cover work draws a $356 fee on discovery.
- Retroactive permitting at 2×. LAMC §91.107.5.1 doubles the fee after the fact — and an inspector may require exposing footings and connections to verify they’re safe, which is destructive on a finished deck.
- Safety and resale exposure. An elevated deck that collapses is a catastrophic liability, and unpermitted square footage is a routine flag at resale.
For the full picture, see What happens if you remodel without a permit in Los Angeles.
Where this fits in the broader LA permit picture
Decks and patio covers are part of the same yard-and-outdoor category as a fence or block wall, which follow the same “depends on size and height” logic. For when a job needs a full review versus a quick permit, see our Express vs Standard Permit guide, and for the steps, how to pull a building permit in LA.
Frequently asked questions
Do I need a permit for a ground-level concrete patio?
Usually no. Concrete flatwork like a patio or walkway that sits no more than 30 inches above grade and isn’t built over a basement is generally exempt from a building permit in LA. Pouring a simple ground-level slab typically doesn’t require one.
When exactly does a deck need a permit?
A deck needs a permit if any of three things is true: it’s attached to the house, it’s more than 30 inches above grade, or it’s larger than 200 square feet. A low, small, freestanding deck that meets none of those can be exempt — but most real decks hit at least one trigger.
Do I need a permit for a patio cover?
Any patio cover attached to the house needs a permit. A detached cover needs one once it exceeds 120 square feet. Small freestanding covers under 120 square feet can be exempt. Many straightforward patio covers qualify for an Express Permit issued the same day.
How much does a deck or patio cover permit cost in LA in 2026?
For a typical residential deck or patio cover, the permit usually runs about $200–$500 depending on size and valuation. A larger or elevated deck that needs engineered drawings and a plan check costs more. Use the Permit360 calculator for a figure tied to your project.
Do I need a permit to replace the boards on my existing deck?
A like-for-like repair — swapping worn decking boards on a sound structure — is generally maintenance and may not need a permit. Rebuilding the framing, footings, or structure, or enlarging the deck, does require one.
Why does the 30-inch height matter so much?
Thirty inches is the threshold where a deck becomes a fall hazard, so above it LA requires both a permit and code-compliant guardrails. It’s the single most important number for deciding whether your deck needs a permit.