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ADU Construction in Westwood

Serving 90024 · 90025 and Bel Air, Brentwood, Century City

California's ADU laws have made backyard units one of the highest-leverage property improvements an LA homeowner can make. We design and build all three types — detached new builds, attached additions, and JADUs (Junior ADUs converted from existing space). End to end. Permits, plans, foundations, framing, finishes, and final inspections, all under one roof. You work directly with Onn from feasibility study through certificate of occupancy.

ADU Construction specifically for Westwood

Every neighborhood has its own architectural character, permit jurisdiction, and finish-level expectations. Here's how we approach adu construction in Westwood specifically.

Condo HOA realities

Most Westwood condos require HOA approval before construction starts. This adds 4–8 weeks to the timeline. We coordinate the HOA submission and answer their questions during their review.

Construction hours

Most condos limit construction to weekdays, 9 AM–5 PM. We schedule projects accordingly — slower than a single-family pace but predictable.

Single-family south of Wilshire

Standard mid-century homes here often have aging electrical, original plumbing, and tight footprints. We plan for systems modernization during any kitchen/bath project.

What's different about adu construction in Westwood

ADUs are rare in Westwood — most parcels are multi-unit

The bulk of Westwood housing is in multi-unit buildings where standard ADU rules don't apply; ADU construction in Westwood is limited to the smaller SFR pocket. Where applicable, the same state and LADBS ADU pathways apply as elsewhere in LA. We verify the parcel's zoning category as part of feasibility before assuming an ADU pathway is open at all.

SFR-pocket ADU parcels often have lot-coverage constraints

Westwood SFR pockets near the UCLA campus often have smaller lots and existing two-story main houses, leaving tight rear-yard envelopes for detached ADUs. The practical maximum ADU on many Westwood SFR parcels is smaller than the state-law maximum allows. We site-walk the parcel against the survey before committing to a footprint — the parcel's actual dimensions and existing structures dictate what fits.

UCLA-adjacent location affects ADU client motivations

Westwood SFR-pocket ADU clients commonly build for adult-child housing (UCLA students), faculty rental, or in-law housing rather than open-market strangers. Program reflects that: simpler studio or 1-bed configurations, durable finishes, in-unit laundry, dedicated entrance. The client's use case shapes the design more than a generic ADU template would suggest.

What we handle

Feasibility & site planning

Lot review, setbacks, height limits, utility access, soil assessment. We tell you up front whether your project pencils — square footage, code constraints, expected timeline.

Architectural design

Floor plans, elevations, 3D renderings. We design to maximize functional space within California's ADU size limits (up to 1,200 sq ft detached, 850 sq ft for studios/1-bedroom).

Permits & utilities

Plan check submission, energy compliance (Title 24), structural engineering, separate or shared utility service. We deal with LADBS or your municipal building department.

Foundation, framing, finish

New foundations or attached construction, framing, mechanical/electrical/plumbing (MEP) rough-in, exterior, and full interior finishes — kitchen, bath, flooring, HVAC, electrical.

Final inspection & C of O

Final inspections, Certificate of Occupancy, and walkthrough. We hand you a unit you can live in, rent, or use as a guest house.

Pricing in Westwood

$250k – $450k

Typical detached ADU build cost in Los Angeles, all-in (design, permits, construction, finishes, utility hookups). Attached ADUs typically run lower; JADUs converting existing space lower still.

LADBS handles Westwood permits. Condo projects require HOA approval before permits — 4–8 weeks added timeline. Condos may also require additional fire-suppression review.

What our Westwood clients say

5.0 ★★★★★ · 47+ Google reviews · real names, real homes

Read all 47 reviews on Google →
Sheina Benzecry
Sheina Benzecry
JULY 1, 2026
★★★★★

I was nervous at first, but the team at Design Onn Point was extremely communicative and made me feel comfortable. They arrived on time each day, kept me updated, and answered all my questions. The crew was professional,…

נופר גולן
נופר גולן
JULY 1, 2026
★★★★★

Design Onn Point turned my kitchen into a beautiful space. The professional was knowledgeable, polite and kept everything on schedule. I love the modern kitchen layout and the quality of the custom kitchen cabinets. High…

simona gordon
simona gordon
JUNE 21, 2026
★★★★★

Design Onn Point was a delight from start to finish. The team was incredibly communicative, always answering my questions quickly and keeping me in the loop. They were punctual, showing up on time every day, and their pr…

Talk to Onn about your Westwood adu construction.

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Licensed CSLB #1133368Fully Insured5.0 · 50 Google reviews

Frequently asked

How big can my ADU be in Los Angeles? +

California state law allows detached ADUs up to 1,200 sq ft (or larger if your local jurisdiction permits). Attached ADUs are limited to 50% of the primary home's square footage or 1,200 sq ft, whichever is less. Junior ADUs (JADUs) are capped at 500 sq ft and must be inside the existing primary structure.

How long does an ADU project take? +

Plan to design and build a detached ADU in 9–14 months total: 2–3 months for design and permits, 6–10 months for construction. Attached ADUs and JADU conversions can run shorter.

Do you work in condos? +

Yes — condo remodels are a regular part of our work. We coordinate HOA approvals, freight-elevator scheduling, weekday-only construction, and protect adjacent units.

How long does a Westwood condo kitchen take? +

Add 4–8 weeks to the standard kitchen timeline for HOA approval. Total project typically 5–7 months from first conversation to final walkthrough.

Live in Westwood?

Onn personally reviews every inquiry. Tell us about your project — Onn will be in touch within one business day.

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