A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateADU Company in El Segundo, CA
Fielding ADU Builders builds ADUs, garage conversions, and room additions in El Segundo, CA. We price the work in writing before anything starts, pull permits, and stand behind the finished job for a full year under The Garrison Standard. El Segundo’s tight lots and older housing stock make accessory dwelling units a practical way to add space without moving, but they also mean most projects need a setback variance or a careful foundation review before the first nail goes in. Call (361) 315-4177 to talk through your lot with a live person, any hour.
Why El Segundo Homes Are Different
El Segundo homes run small and old. A large share of the housing stock was built between the 1940s and 1960s, which means shallow footings, aging sewer laterals, and electrical panels that were sized for a different era. Any ADU or room addition here starts with a look at what the existing structure can actually carry. We check it before we quote it, so the price you approve on day one is the price on the final invoice.
The soil is another factor. El Segundo sits on coastal plain terrain with sandy, well-drained soils near the western edge and firmer ground as you move east toward the 405. That variation changes foundation design from block to block. A backyard ADU off East Grand Avenue may need different pier depths than one near El Segundo Boulevard. We see it routinely and plan for it up front.
Permitting follows Los Angeles County and city of El Segundo rules. Many residential lots here are zoned R-1 with very little side yard to spare, so a setback variance, the city’s written permission to build closer to the property line than the standard rule allows, is common on garage conversions and detached ADUs. We handle that paperwork as part of the job.
Our Main El Segundo Services
Most El Segundo homeowners call us about one of three things: adding a room, converting a garage, or building a detached ADU in the yard. Each has its own page specific to this city.
Room Addition Contractor in El Segundo
Room additions in El Segundo usually mean expanding off the back of a 1950s or 1960s single-story home, tying into rooflines and foundations that were never designed for it. Matching the existing framing and roofline is the part that separates a clean addition from one that looks bolted on. We also coordinate with the city on setback and height rules, which are tight in this city. For a full breakdown of how we build room additions here, see our Room Addition Contractor in El Segundo page.
Garage Conversion Contractor in El Segundo
Garage conversions are the most space-efficient move in El Segundo because the footprint already exists. The work is usually a conversion to an ADU: new insulation, drywall, flooring, a kitchenette or bath rough-in, and a new foundation edge if the slab needs it. Many older El Segundo garages were built as car storage with little thought to moisture or ventilation, so we correct both before closing walls. See our Garage Conversion Contractor in El Segundo page for local pricing and specifics.
ADU Builders in El Segundo
Detached ADUs in El Segundo backyards typically mean a 400 to 800 square foot unit, often a studio or one-bedroom, placed behind the main house and connected to new utility lines. We work with leading prefab platforms like Abodu, Cover, and Dvele when the lot and budget favor a factory-built unit, and we build conventional stick-frame ADUs with James Hardie siding when they don’t. The full El Segundo ADU process, including permit sequencing and site prep, is on our ADU Builders in El Segundo page.
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 El Segundo
We install and finish structures from Abodu, Cover, Dvele, and Mighty Buildings, and we do conventional builds with James Hardie siding and Tuff Shed-style foundations. Parts and panels for the major prefab lines are staged from our Los Angeles hub, so El Segundo jobs don’t wait on long-distance freight. See our brands for what we carry and service.
Pricing for ADU Company in El Segundo, CA
| Service | Typical range in El Segundo |
|---|---|
| Detached ADU (prefab, full install) | $180,000 – $320,000 |
| Detached ADU (site-built, basic finish) | $220,000 – $400,000 |
| Garage conversion to ADU | $95,000 – $165,000 |
| Garage conversion (basic living space, no bath) | $60,000 – $95,000 |
| Room addition (150 – 250 sq ft) | $48,000 – $85,000 |
| Room addition (250 – 500 sq ft) | $75,000 – $150,000 |
| Foundation repair before ADU work | $4,500 – $18,000 |
| Electrical panel upgrade (100A to 200A) | $3,200 – $6,800 |
| Site prep and utility trenching | $4,000 – $14,000 |
| Permit and plan set fees | $6,000 – $16,000 |
Setback variances, soft soil, and the age of the existing structure are the three things that push El Segundo prices toward the top of these ranges. What you approve on day one is what you pay. That’s the written-price promise on every Fielding ADU Builders project.
Neighborhoods We Serve in El Segundo
We work across El Segundo, from the older blocks near Main Street up to the industrial edge along the 405. Each pocket has its own rhythm with the city’s setback and height enforcement, and we route crews so your permit inspection doesn’t stall behind a job across town.
- Smoky Hollow
- El Segundo downtown core
- Northeast El Segundo (near Campus El Segundo)
- West of Sepulveda Boulevard
- South of Imperial Avenue
Service Area – Cities Near El Segundo
Fielding ADU Builders serves El Segundo and the surrounding South Bay and Westside communities. If your property sits just outside the city line, we also cover Manhattan Beach, CA, Hawthorne, CA, Inglewood, CA, and Hermosa Beach, CA.
Serving El Segundo, CA - Our Local Coverage Area
We’re based in the El Segundo 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 El Segundo
Plan on two to four months of design and permitting before site work begins. El Segundo plan check turnaround varies by project scope and whether a setback variance is required. Call (361) 315-4177 and we’ll give you a straight read on your lot.
Most El Segundo residential lots are not HOA-governed, but a few newer developments near Campus El Segundo are. If your street has an HOA, we confirm the architectural review step before the city submittal, and we flag it in the written price. Estimates are free so call (361) 315-4177.
No. The written price is the fixed price, unless you change the scope mid-job. The Garrison Standard says price in writing before any work starts, and that’s how we operate on every El Segundo project. Call (361) 315-4177 for an exact quote.
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 El Segundo Customers Say
"Garage conversion with a new bath and kitchenette. Permit was handled by them. Inspection passed first time."
- Sheila B."Honest feedback on what the lot could fit. Told me up front what would fit on the lot and what the setbacks would allow."
- Rita C."Clear price breakdown. Change orders were all in writing."
- Hal P.
