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Westside Windows & Doors.

LA window + door — full-frame or retrofit, Milgard, Andersen, Marvin. Title 24 U-factor and SHGC compliance every job.

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

$650 – $2,200 per opening installed

Vinyl retrofit bottom; aluminum-clad new-construction top.

Westside permit clock

8–12 weeks ministerial

1 week for 15-opening whole-home swap.

Scope — start to keys.

  • Measure + order
  • Remove existing
  • Install + flash
  • Trim + caulk
  • 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.

Cost to replace LA home windows?
$650–$1,200 vinyl; $1,400–$2,200 fiberglass or aluminum-clad. Per opening installed.
Retrofit vs full-frame?
Retrofit saves $200–$400/opening but requires good existing frames.
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.

Windows & Doors in nearby LA areas.

Got a Westside project in mind?

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

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