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Westside Decks & Patios.

LA decks — backyard ground-level, raised, rooftop. Composite (Trex, TimberTech), redwood, and IPE. Engineer + LADBS permit on raised or attached.

Westside permits move quickly when the parcel is clearly inside the city of LA or Santa Monica grid — both jurisdictions run ministerial ADU review under state law. The variables are Coastal Zone status (anything west of Lincoln Blvd in Venice / Marina Peninsula), and whether a soft-story or seismic ordinance applies to the existing structure.

Westside cost band — 2026

$45 – $110 / sqft

Pressure-treated bottom; composite + steel top.

Westside permit clock

8–12 weeks ministerial

2–4 weeks depending on size + height.

Scope — start to keys.

  • Engineering + permit
  • Footings + posts
  • Framing + ledger
  • Decking + railing
  • Final inspection

What changes about the permit here.

  1. City of LA parcels: LADBS ePlanLA portal, ministerial ADU review under LAMC §12.22-A,33.
  2. Santa Monica parcels: SMMC §9.31.300 — locally streamlined, similar 60-day clock as state law.
  3. Coastal Zone (Venice west of Lincoln, Marina Peninsula): Coastal Development Permit may be required.
  4. Mello Act applies to demolition or replacement of existing residential units in the Coastal Zone.

What moves the Westside number.

  • Westside labor and dump fees price 8–12% above LA County median.
  • Coastal Zone parcels often add $15–40k in CDP consultant + biology survey costs.
  • Santa Monica seismic retrofit pairing on a duplex can add $35–80k tied to the ADU permit cycle.
  • Tight street parking (Venice, Mar Vista) drives crane / pump days higher than Valley jobs.

In short.

LA deck cost?
$45–$70/sqft pressure-treated; $80–$110 composite or IPE.
Do I need a permit for a low patio?
No if under 30in above grade and detached.
Do I need a Coastal Development Permit for a Westside ADU?
Only if the parcel is inside the Coastal Zone — generally west of Lincoln Blvd in Venice and the Marina Peninsula. Inland Westside parcels (most of Santa Monica, Brentwood, Mar Vista east of Lincoln) do not.
Can I build an ADU in Santa Monica's R1?
Yes. SMMC §9.31.300 mirrors state ADU law on R1, R2, and multifamily lots, with ministerial 60-day review once the submittal is complete.

More we build in Westside.

Decks & Patios in nearby LA areas.

Got a Westside project in mind?

Send us the address and we’ll pull Westside zoning, setbacks, and decks & patios feasibility before you spend on drawings.

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