ADU Builder & Home Additions in Westwood, CA
Source: https://www.remodelyourvibe.com/services/adus-additions/westwood
Last modified: 2026-09-24T00:00:00.000Z
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Image: Detached backyard ADU with wood siding and black-framed glass doors at dusk
- Westwood
Design · Permit · Build
ADUs & Additions in Westwood
Detached ADUs, garage conversions and additions, from plans to move-in.
Book a Consultation Call 818-300-2393
Built for Westwood Homes
Westwood is best known for UCLA and the Mediterranean-themed storefronts of Westwood Village, yet the city's Westwood Community Plan counts 70 percent of the community's residential acreage as single-family. The land rises from flat blocks in the south to rolling hillside toward Sunset Boulevard, and the largest lots sit east of Beverly Glen Boulevard, north of Holmby Park.
Closer to the campus and south of Wilshire, home sites are generally smaller and the ground undulates, so a pool, a terrace and an ADU have to share space with real discipline. Building, grading and pool permits all come from LADBS, and the city's Hillside Grading Area reaches across nearly the whole community, flat streets included.
The largest lots sit in the Minimum Residential area east of Beverly Glen Boulevard and north of Holmby Park. Generally smaller home sites on undulating ground lie east and west of the UCLA campus and south of Wilshire Boulevard. High-rise condominium towers line Wilshire between the Los Angeles Country Club and Malcolm Avenue, with single-family streets extending north and south of that corridor.
We are a design-build team, which means the people who draw your project are the people who build it. Design, engineering, permits and construction run through one project manager and our own crews, so nothing gets lost in a handoff between a salesperson and a subcontractor. We are licensed, bonded and insured, CSLB license #1119054 .
Permits in Westwood: Private pools in the City of Los Angeles are permitted through a Combined Building-Mechanical permit, while pools serving more than two dwelling units need separate building, electrical, plumbing and mechanical permits. Using a City of Los Angeles standard plan on file with LADBS reduces plan check time.
Nearly all of Westwood, its flat southern blocks included, lies inside the city's Hillside Grading Area, so excavating for a permitted pool here also requires a separate LADBS grading permit. The community sits outside the city's mapped Hillside Area, the zone where Baseline Hillside Ordinance limits apply.
Specific plans that require Design Review Board approval cover most of Westwood's multifamily and commercial areas, including Westwood Village and North Westwood Village, while its single-family blocks generally fall outside them.
Permit details checked September 2026 against LADBS and LA City Planning . Rules change, so we confirm them again for your parcel.
What We Build
- Grading permits for pools in the Hillside Grading Area
- Soils review for pools and ADUs in the liquefaction zone
- Fault-zone screening for ADUs and additions
- Estate-lot planning north of Holmby Park
- Detached ADUs, ground-up
- Garage conversions to living space
- Junior ADUs within the main house
- Room additions and bump-outs
- Second-story additions
- Full kitchens and bathrooms in the ADU
- Separate utility metering where required
- Private entries, patios and landscaping
- Plans, engineering and city submittals
- Title 24 energy compliance
Local Conditions
What to Know in Westwood
These local conditions change the scope, the schedule and the budget.
01
Terrain runs from flat land in the southern section to rolling hillside in the north, so the grading and drainage approach for a pool near Santa Monica Boulevard can differ markedly from one on a sloping lot closer to Sunset Boulevard
02
Parts of western Westwood, including a band running from Westwood Village south toward Santa Monica Boulevard, are mapped in a seismic hazard liquefaction zone, a condition worth resolving with a soils engineer before a pool shell or ADU foundation is designed
03
The Alquist-Priolo Earthquake Fault Zone for the Santa Monica Fault runs along Westwood's southern edge near Santa Monica Boulevard, so ADU and addition sites there are worth checking against the zone map early
Areas we serve in Westwood:Holmby HillsHolmby WestwoodWestwood HillsComstock HillsWestwood VillageNorth Westwood Village
Investment
What It Costs in Westwood
Real Southern California price ranges, not teaser numbers.
Detached ADU
$150,000 to $400,000+
What moves it: square footage, finish level, utility runs, and site access; garage conversions typically run well below a ground-up detached build
Garage conversion ADU
$80,000 to $180,000
What moves it: whether the existing slab and framing meet current code, how far utilities have to run, and the finish level of the kitchen and bathroom
Plans, drawings and permit management
$4,500 to $25,000+
What moves it: project type and size, whether structural engineering, Title 24 or a soils report is required, and how many jurisdictions or review bodies are involved
Your lot, access and finishes set the price. We walk the site, then show you where every dollar goes.
Get a line-item price for your Westwood property
The Process
How We Work in Westwood
01
Feasibility
We check lot size, setbacks, utilities and access to confirm what your property will actually support.
02
Design & 3D
Layout, elevations and finishes, modeled in 3D so you approve the unit before submittal.
03
Plans & Permits
We prepare the full drawing set, handle engineering and Title 24, and manage the city submittal and corrections. In Westwood that submittal goes to Los Angeles Department of Building and Safety (LADBS).
04
Foundation & Framing
Site prep, foundation, framing and dry-in by our own crews.
05
Systems & Finishes
Electrical, plumbing, HVAC, insulation, then kitchen, bath and interior finishes.
06
Final Inspection
We pass final inspection, walk the unit with you and hand over the keys.
Questions
What Westwood Homeowners Ask
Who issues the permits for this work in Westwood?
Los Angeles Department of Building and Safety (LADBS). Private pools in the City of Los Angeles are permitted through a Combined Building-Mechanical permit, while pools serving more than two dwelling units need separate building, electrical, plumbing and mechanical permits.
Using a City of Los Angeles standard plan on file with LADBS reduces plan check time. Nearly all of Westwood, its flat southern blocks included, lies inside the city's Hillside Grading Area, so excavating for a permitted pool here also requires a separate LADBS grading permit.
The community sits outside the city's mapped Hillside Area, the zone where Baseline Hillside Ordinance limits apply. Specific plans that require Design Review Board approval cover most of Westwood's multifamily and commercial areas, including Westwood Village and North Westwood Village, while its single-family blocks generally fall outside them.
We prepare the drawings, make the submittal and handle plan-check corrections ourselves, so you are not the one chasing plan check.
What makes building in Westwood different?
The largest lots sit in the Minimum Residential area east of Beverly Glen Boulevard and north of Holmby Park. Generally smaller home sites on undulating ground lie east and west of the UCLA campus and south of Wilshire Boulevard. High-rise condominium towers line Wilshire between the Los Angeles Country Club and Malcolm Avenue, with single-family streets extending north and south of that corridor.
One local condition that shapes the work: Terrain runs from flat land in the southern section to rolling hillside in the north, so the grading and drainage approach for a pool near Santa Monica Boulevard can differ markedly from one on a sloping lot closer to Sunset Boulevard.
Which parts of Westwood do you work in?
All of it, including Holmby Hills, Holmby Westwood, Westwood Hills and Comstock Hills. Our crews run every job out of our Cahuenga Pass base in Los Angeles, with our own people on site.
What does an ADU or addition cost in Westwood?
Detached ADU: generally $150,000 to $400,000+ across Southern California. What moves it is square footage, finish level, utility runs, and site access; garage conversions typically run well below a ground-up detached build. We give line-item pricing after seeing the site rather than quoting a number over the phone.
How long does an ADU take start to finish?
Plan a realistic year. Design and engineering typically take one to three months, city plan check and corrections add several more, and construction usually runs four to eight months depending on size and site access.
Is a garage conversion cheaper than a detached ADU?
Usually yes, and often substantially, because the foundation, walls and roof already exist. The trade-offs are that you lose the garage, and older slabs and framing sometimes need upgrading to meet current code.
Can I rent the ADU out?
California ADU law is designed to allow long-term rental, and an ADU is one of the few ways to add rentable square footage to a single-family lot. Short-term rental rules vary by city, so confirm your local ordinance before counting on that income.
Do you handle the permits?
Yes. Plans, engineering, Title 24 and the city submittal are all handled in-house, including responding to plan-check corrections. That is a service we sell on its own, so it is not something we hand off.
More Services in Westwood
Pool & Spa Remodeling in Westwood Backyard & Outdoor Living in Westwood Everything we build in Westwood
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Planning Guides
Before You Build in Westwood
Costs, materials and process notes from our own projects.
ADU Cost Breakdown by Size in Los Angeles A detached ADU in Los Angeles runs $150,000 to $400,000-plus. Here is the real cost broken down by unit size, with the soft costs, utility work and finish decisions that move the number. Read guide Garage Conversion to ADU: The Step-by-Step Build A garage conversion runs $80,000 to $180,000 in Southern California. Here is the real sequence, from slab testing and plan check to the raised floor, the mini-split and final sign-off. Read guide ADU Rental Income Math in the San Fernando Valley A one-bedroom ADU in the San Fernando Valley rents for roughly $2,100 to $2,900 a month. Here is the honest arithmetic on payback, carrying costs and what the unit adds to the property. Read guide Second Story Addition vs Building Out: Which Costs Less Building out runs $350 to $500 per square foot. Going up runs $450 to $700. Here is when the cheaper option is actually the wrong one, and what drives each number. Read guide
Planning an ADU in Westwood?
Sit down with your project manager and get an accurate estimate. We call you back within one business day.
Book a Consultation 818-300-2393
Licensed, bonded & insured · CSLB license #1119054
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