What's Required in Los Angeles
- Platforms not more than 30 in above grade, and work valued at $2,500 or less, are exempt from a building permit (LAMC 91.106.2)
- Decks higher than 30 in need an LADBS building permit with a valuation-based fee and a plan check fee equal to 90% of the permit fee
- Raised walking surfaces over 30 in require 42-in guards, which count toward fence height in yards
- Open unroofed platforms may project up to 6 ft into a required yard and no more than 6 ft above natural grade (not in hillside front yards)
- Plans: plot plan with property-line distances, framing and footing plan, Type V sheet or engineer's calculations
- Structural repairs to existing decks need a building permit; express framing-repair permits exclude decks
- Owner-builders sign the Owner-Builder Declaration; contractors need a CSLB B license
- Inspections at footings, rough framing and final, requested a day ahead before 2 PM
- Permit expires if work has not started within six months
Do You Need a Permit to Build a Deck in Los Angeles?
It depends on height and value. The 2026 Los Angeles Building Code, LAMC 91.106.2, exempts platforms, walks and driveways not more than 30 inches above grade and not over any basement or story below, and separately exempts work valued at $2,500 or less that does not affect structural stability or public safety. A low ground-hugging deck therefore needs no building permit from the Department of Building and Safety (LADBS). Once the walking surface is higher than 30 inches you need a permit, a guard at least 42 inches high, and plans that show footings, framing and the ledger or posts. An attached deck is filed as an addition; a detached one as a new accessory structure. The zoning code also limits how far a deck may project into a required yard and how high it may sit, and a roof over it turns it into a patio cover with its own standard.
Los Angeles Deck Permit Rules by Scenario
| What you are doing | City filing | Rule |
|---|---|---|
| Platform or deck not more than 30 in above grade | None | LAMC 91.106.2 item 5; zoning yard rules still apply |
| Any deck work valued at $2,500 or less | None unless it affects structural stability | LAMC 91.106.2 item 1 |
| Deck higher than 30 in, attached to the house | Building permit with plan check (addition) | Valuation-based fee; 42-in guards required |
| Detached raised deck | Building permit with plan check (new structure) | Counted as a separate structure only if 10 ft from the house |
| Replacing rotted joists, posts or stairs on an existing deck | Building permit; express permit excludes decks | Express Permits IB item 14 and 15 |
| Recoating an existing deck surface | Express permit, no plan check | Express Permits IB item 24 |
| Adding a roof or cover | Building permit as a patio cover | IB P/BC 2026-006 Attached Patio Cover |
How Much Does a Deck Permit Cost in Los Angeles?
LADBS charges a building permit fee on the valuation of the work and a plan check fee equal to 90 percent of the permit fee, plus surcharges on both. The city's Permit Fee Calculator, run as a residential addition, returns a permit total of $363.15 and plan check of $317.13 for a $15,000 deck, about $680 together; $501.90 plus $442.01, about $944, for $25,000; and $637.90 plus $563.50, about $1,201, for $40,000. Those totals already include the green building, plan maintenance, earthquake instrumentation, planning and system surcharges. Paying by card adds 2.7 percent. A permit for a $10,000 alteration such as reframing part of an existing deck runs $250.40 plus $214.19 plan check.
Zoning: Where a Deck Can Sit
LADBS bulletin P/ZC 2023-004 explains the yard rules. An open, unroofed porch, platform or landing that does not extend above the first floor may project up to 6 feet into a required front, side or rear yard, but may never be more than 6 feet above natural grade there, and the rule does not apply to front yards on hillside lots. Any surface higher than 30 inches needs a 42-inch guard, and the guard counts toward the overall wall or fence height. A detached deck is treated as a separate structure only if it is at least 10 feet from the house.
Who Pulls the Permit and What Gets Inspected
Homeowners may sign for an owner-builder building permit after reading and initialing the Owner-Builder Declaration at issuance. A hired contractor needs a CSLB license, and LADBS matches building permits to the B classification. Bring a plot plan with distances to property lines, a framing plan and footing details; the Type V sheet from any LADBS counter covers most prescriptive wood framing. Simple decks go through Counter Plan Check, which LADBS finishes over the counter the same day in about 45 minutes. Inspections are requested a day ahead, before 2 PM: footings before concrete, rough framing before decking, and final. The permit lapses if work does not start within six months.
How to Get a Deck Permit in Los Angeles
Measure height and value
At or below 30 in above grade, or a job worth $2,500 or less with no structural change: no building permit. Otherwise file.
Check the yard rules
Confirm setbacks in ZIMAS; unroofed platforms may project 6 ft into a required yard and sit no more than 6 ft above grade there.
Draw the plans
Plot plan, framing plan, footing and ledger or post details; use the LADBS Type V sheet for prescriptive framing or an engineer's stamped plans.
Plan check and permit
Counter Plan Check is same-day, about 45 minutes; fees run about $680 total for a $15,000 deck and about $1,201 for $40,000. Owner-builders sign the declaration at issuance.
Build and inspect
Request inspections a day ahead: footings before concrete, framing before decking, then final. Guards must be 42 in where the deck is over 30 in high.