ADU Company in Westmont, CA
Lodgewick ADU Builders is the ADU company of the Kingswell family, and we work throughout Westmont on accessory dwelling units, garage conversions, and home additions. Westmont is an unincorporated Los Angeles County community, which means every permit runs through LA County Building and Safety rather than a city hall counter. That changes plan-check timelines, fee schedules, and the kind of paperwork you’ll need. We know the county’s process well, and we put a written price in front of you before any work begins. Call (254) 602-5618 to talk through your lot.
Why Westmont Homes Are Different
Westmont’s housing stock is mostly post-WWII bungalows and small ranch homes built between the 1940s and 1960s. These are wood-frame houses on compact lots, and many still have their original detached single-car garages. A one-car garage from that era is typically 200 to 250 square feet, which is tight for a comfortable ADU but very workable as a garage conversion under California’s streamlined conversion laws. Older foundations sometimes need seismic retrofit attention before anything goes up, and we factor that into the written price instead of springing it on you mid-project.
The flat LA Basin interior here means no hillside engineering, but Westmont sits inside LA County’s seismic and high-fire overlay zones. Some parcels are flagged in a Very High Fire Hazard Severity Zone, which brings additional exterior material requirements. We check parcel-by-parcel with LACBS before we quote, so you’re not surprised later. Because LACBS manages a large unincorporated territory, plan-check turnaround in Westmont can run longer than what a homeowner in neighboring Gardena would see at their own city counter. Front-loading a complete, county-formatted submittal package is how we keep Westmont projects moving weeks faster than they otherwise would.
Our Main Westmont Services
Most Westmont homeowners reach out to us about three things: adding square footage to the main house, turning an underused garage into living space, or building a standalone unit in the backyard. Here’s how each works in Westmont.
Home Addition Contractor in Westmont
A home addition in Westmont usually means extending off the back or side of a 1940s – 1960s ranch home. Those older wood-frame structures often need foundation assessment and seismic anchoring before new walls tie in, and LA County’s plan-check process means drawings need to be complete and code-compliant on the first submittal. We handle the full scope, from architectural coordination through county inspections. For a deeper look at what’s involved, see our Home Addition Contractor in Westmont page.
Garage Conversion Contractor in Westmont
Westmont’s detached single-car garages are ideal candidates for conversion because California’s streamlined ADU conversion laws reduce parking replacement requirements when the structure already exists. We convert the garage shell into a permitted dwelling unit with insulation, electrical, plumbing, and a small kitchen and bath. The original garage footprint usually stays the same, which keeps costs predictable. Details on timelines and finishes are on our Garage Conversion Contractor in Westmont page.
ADU Builders in Westmont
A backyard ADU is a small house on a larger property – which is exactly what the word “lodge” points to. In Westmont, a lot with a 1940s bungalow and an underused rear yard can often fit a 400 to 800 square foot detached unit, depending on setbacks and lot coverage rules from the Department of Regional Planning. We walk each parcel’s constraints before we recommend a build path. See our ADU Builders in Westmont page for the full breakdown.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Brands We Service in Westmont
We work regularly with prefab ADU lines from Cover, Dvele, and Mighty Buildings. Panelized systems from these manufacturers can reduce on-site framing time by weeks, which matters in Westmont when county plan-check already adds time to the front end. Learn more on our brands page.
Pricing for ADU Company in Westmont, CA
| Service | Typical range in Westmont |
|---|---|
| Garage conversion to ADU (attached, existing garage) | $80,000 – $120,000 |
| Detached ADU (400 – 600 sq ft, panelized/prefab) | $150,000 – $220,000 |
| Detached ADU (600 – 800 sq ft, custom stick-built) | $220,000 – $310,000 |
| JADU (junior ADU, within existing home footprint) | $50,000 – $80,000 |
| Home addition (300 – 500 sq ft, bedroom/bath extension) | $90,000 – $160,000 |
| Home addition (500 – 800 sq ft, kitchen/family room extension) | $160,000 – $250,000 |
| Seismic retrofit (crawlspace foundation, typical Westmont bungalow) | $8,000 – $18,000 |
| High-fire-zone exterior material upgrade | $3,000 – $9,000 |
What pushes a Westmont ADU or addition toward the top of these ranges is usually an older foundation needing seismic work, a parcel flagged in a high-fire overlay, or county plan-check corrections that delay mobilization. That’s why our written price comes after a site walk and a parcel-specific LACBS review – not before. The Kingswell Guarantee means the number we put in writing is the number you pay, and the guarantee itself is in writing on every project.
Neighborhoods We Serve in Westmont
We cover the full Westmont footprint, from the blocks around South Vermont Avenue east to the residential streets near the 110, and from Century Boulevard south toward Imperial Highway. Our crews are local to the LA Basin, so most Westmont job sites see us within a few days of the estimate, with a defined arrival window on the schedule we put in writing.
- Unincorporated Westmont core (Vermont to Western)
- West Athens-adjacent blocks
- Vermont Knolls edge
- South Vermont corridor
- Imperial Highway residential side streets
Service Area – Cities Near Westmont
While this page covers Westmont, our crews also work across the LA Basin. If your property sits near the Westmont boundary, you may be closer to one of these service areas: Los Angeles, CA, Long Beach, CA, Anaheim, CA, or Riverside, CA. Each city page covers the local permit and pricing picture for that area.
Serving Westmont, CA - Our Local Coverage Area
We’re based in the Westmont area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About ADU Company in Westmont
Westmont plan-check runs through LA County Building and Safety, and turnaround is often longer than neighboring incorporated cities like Gardena or Inglewood. A complete, county-formatted submittal package typically clears in 4 to 8 weeks, while incomplete submittals stall for months. Call (254) 602-5618 to get a written quote and realistic timeline for your parcel.
Yes. Westmont is unincorporated, so both building permits and planning approvals come from LA County, not any city hall. Garage conversions under California’s streamlined ADU laws still require LACBS plan-check, inspections, and a certificate of occupancy. Our team front-loads the full package to keep the process moving. Estimates are free.
We handle the full scope: architectural coordination, county submittal, construction, and inspection sign-off. The written price covers the work we agree on before the first nail is driven, and the 365-Day Done Right Promise means we come back if anything isn’t right. Call (254) 602-5618 to schedule your free estimate.
What happens when you call
- 1A real person answersNo phone trees - talk to a local adu pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Westmont Customers Say
"Garage conversion into an office and guest room. Fair written price, finished close to on schedule, and they fixed a small drywall crack under warranty months later without any hassle."
- Diana Cho"The ADU came out beautiful and the permitting, which terrified me, was handled start to finish. They kept me updated every week so I was never wondering what was happening."
- Shauna Mills"A whole backyard ADU from scratch. Terrified me going in, but they kept me updated weekly and there were no nasty surprises. Quality work and a fair price."
- Noreen Fletcher