Los Angeles permit
Deck permit in Los Angeles
Decks over 30 in. above grade need a permit. We map the path and generate the site plan + framing.
Permit threshold
30 in. above grade
Decks more than 30 inches above grade need a permit + guardrail per CRC R312.
Typical cost
$30-100/sqft built
Pressure-treated wood $30-50. Composite (Trex, TimberTech) $50-80. Hardwood $70-100+.
License needed
B (general) or C-5 (framing)
Permit can be pulled by owner-builder for residential. Most homeowners hire a licensed contractor.
Permit speed
Same day to 4 weeks
Simple ground-level deck: same-day. Elevated 6 ft+ structural deck: 2-4 weeks plan check.
4 LA deck permit gotchas
30-inch rule + guardrail (CRC R312)
A "deck" 30 inches above grade triggers the building permit AND requires a 36-inch minimum guardrail with balusters spaced no more than 4 inches apart. Below 30 inches: no permit needed (in most cases) and no guardrail. Above: full permit + structural inspection. People misjudge their grade height all the time — measure from the lowest point under the deck, not the door threshold.
6 ft and structural review kicks in (CRC R507)
Decks 6 ft or higher above grade trigger structural plan review — typically requires engineering for the post sizing, footing depth, and ledger attachment. Add $500-2,000 for engineering + 2-3 weeks. Houses on hillside lots almost always have a section that crosses 6 ft when measured from downslope.
Ledger attachment is the #1 deck failure mode
Decks attached to the house with a ledger board MUST be flashed properly + bolted into the rim joist or a structural member, not just into siding/sheathing. LADBS inspectors check this carefully. Decks fall off houses every few years in LA storms because someone screwed the ledger to T1-11 siding. Lag bolts, washers, Z-flashing — non-negotiable.
Setbacks apply to elevated decks
Decks under 30 inches don't count toward setbacks. Decks above 30 inches DO — they're considered habitable space and have to honor your zone's side/rear setbacks (5 ft typical R1). A second-story deck cantilevered into the side yard violates setbacks and gets rejected.
Questions about deck permit permits?
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Often paired with
These permits commonly come up alongside a deck permit project in LA.
Pool / spa permit
New LA pools need plan check + multi-stage inspections + a CA Pool Safety Act barrier. We map the path and generate the site plan.
Fence permit
LA fences over 3.5 ft (front yard) or 6 ft (side/rear) need a permit. HPOZ neighborhoods have tighter rules. We map yours.
Retaining wall (hillside)
Retaining walls under 4 ft are straightforward; 4 ft+ need engineer stamping. Hillside adds drainage review.
Check your address first
Get the verdict + zoning + overlays + LADBS forms specific to your lot. Free, no signup.
Run feasibility check →Drawings we generate for you
Auto-drawn from your address using LARIAC orthoimagery, parcel polygons, and Microsoft Building Footprints.
- Site plan
- Cross-section
- Elevations
What the code requires
Typical baseline for an R1 lot with no overlays. The wizard adjusts these for your specific zone + overlays (Hillside, HPOZ, VHFHSZ, Coastal, etc.). Every value cites its source code section.
| Rule | Value | Source |
|---|---|---|
| Permit-required height | 2.5 ft | CA Residential Code R301.5, LAMC 91.0105 |
| Guardrail required at | 2.5 ft | CA Residential Code R312 |
| Structural review required at | 6 ft | CA Residential Code R507 |
| Side setback | 5 ft | LAMC 12.21C5 |
LADBS application + forms
Who you'll need
Pros that pull this deck permit
Pro categories whose specialty involves this permit type. Each links to a category page with license-class info, a request-quotes form, and (where populated) a hand-curated directory.