A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateADU Company in Compton, CA
Adding an ADU to a Compton property usually costs between $180,000 and $380,000 for a full build, with garage conversions running $110,000 to $190,000. The number moves based on your lot size, the condition of any structure you’re converting, and how the city’s planning rules apply to your block. Fielding ADU Builders handles permits, foundation work, and the build itself, and you get a written price before anything starts. Call (361) 315-4177 to walk through your property with us.
Why Compton Homes Are Different
Compton housing stock trends older, and that shapes ADU work more than most people expect. A large share of the homes were built between the 1940s and the 1970s. That means electrical panels often need upgrading before a detached ADU can pass inspection, and older foundations rarely sit perfectly level after decades of Southern California settling. We plan for those conditions up front instead of discovering them mid-project and handing you a change order.
The lots themselves are a real advantage here. Compton has a high number of single-family parcels with usable backyard depth, which means detached ADUs are often the most practical route – you are not fighting for a few feet of side yard. But the same climate that makes the South Bay pleasant also punishes cheap materials. Sun and heat demand good insulation and heat-reflective roofing, and a poorly flashed build will show leaks within two or three years. We build for those conditions the first time.
Permits move through the City of Compton building department, and like most Los Angeles County cities, the process rewards complete plans and correct paperwork. Local ADU laws are favorable under state rules, but setbacks, lot coverage, and utility connection requirements still vary by parcel. We pull the permits ourselves and schedule the inspections. Check the home page if you want a broader view of how we work.
Our Main Compton Services
Compton homeowners mostly reach out about two things: converting what they already have, or building new in the backyard. Each has its own page below with specifics.
Room Addition Contractor in Compton
A room addition in Compton usually means extending the back or side of the house to add a bedroom, a larger kitchen, or a family room. Older homes here often need foundation ties matched to the existing slab, and the roof line has to be integrated so it doesn’t turn into a leak point at the seam. The value comes from doing the structural work right and matching the existing finish work closely enough that the addition doesn’t look bolted on. Room Addition Contractor in Compton covers the full process, including what we do when the existing structure needs repair before the addition starts.
Garage Conversion Contractor in Compton
Compton garages from the 1950s and 60s are common candidates for conversion, but they come with specific issues. Many were built as detached structures with minimal foundation depth, thin slab pours, and electrical service that was never sized for living space. A conversion means bringing the floor, walls, and wiring up to residential code, adding insulation, and handling drainage so the finished space doesn’t collect water at the edges. Garage Conversion Contractor in Compton walks you through the inspection realities and what a typical conversion costs here.
ADU Builders in Compton
A detached backyard ADU in Compton gives you a separate address, separate utilities, and the most flexibility for tenants or family. Backyard depth on local lots usually supports a 600 to 1,000 square foot unit without eating the whole yard. We build conventional wood-frame ADUs and also work with prefab and modular platforms where the lot and budget make that the smarter call. ADU Builders in Compton details the build methods, timelines, and real price ranges.
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 Compton
We install and service ADUs built around James Hardie siding and enclosure systems, and we’re fluent with prefab platforms including Abodu and Cover. Panels and trim parts stay available through our local supply chain, so warranty work in Compton doesn’t wait on cross-country shipping. See our brands for the full list.
Pricing for ADU Company in Compton, CA
| Service | Typical range in Compton |
|---|---|
| Full ADU build (detached, finished) | $180,000 – $380,000 |
| Garage conversion (attached or detached) | $110,000 – $190,000 |
| Room addition (200-400 sq ft) | $70,000 – $150,000 |
| Room addition (400-700 sq ft) | $140,000 – $250,000 |
| Foundation work (new slab or retrofit) | $8,000 – $35,000 |
| Electrical panel upgrade (100A to 200A) | $3,500 – $7,500 |
| Plumbing rough-in (new bath or kitchen) | $8,000 – $20,000 |
| Insulation and drywall package | $15,000 – $35,000 |
| Permit fees and plan checks | $4,000 – $15,000 |
What pushes the number up in Compton is usually the existing condition: older electric panels, slab work on settling ground, or drainage corrections on flat lots that pool water. The price you approve in writing before work starts is the price on the final invoice. We don’t bring change orders to the door mid-build.
Neighborhoods We Serve in Compton
Fielding ADU Builders covers the full city, from the neighborhoods around the Civic Center up through the residential blocks along the 91 and 710 corridors. Crews work throughout Compton weekdays and schedule inspections around the city’s calendar, so a start date holds.
- Sunny Cove
- Richland Farms
- East Compton
- Civic Center area
- Lueders Park area
Service Area – Cities Near Compton
We also run ADU, addition, and conversion work in the cities around Compton. If you’re one town over, one of these pages covers your area: Gardena, CA, Carson, CA, Lynwood, CA, and Paramount, CA. Each page has the local pricing and permit details for that city.
Serving Compton, CA - Our Local Coverage Area
We’re based in the Compton 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 Compton
Once you approve a written estimate, permitting usually takes one to three months depending on the city’s plan-check queue and whether your project needs any variances. We handle the submittal, the revisions, and the inspection scheduling. Call (361) 315-4177 and we’ll give you a realistic start window for your specific lot.
Yes. We pull all permits from the City of Compton, schedule inspections, and stay on site until the final sign-off. Your written price includes the permit fees and plan-check costs we can identify up front, with any city-specific fee adjustments shown to you before they’re paid.
Flat lots and older grading are common in Compton, and they matter for ADU foundations and garage conversions. We assess drainage during the estimate, correct slope where the city requires it, and build the foundation to handle standing water and seasonal rain. The correction is in the written price before we start.
For a free estimate on an ADU, garage conversion, or room addition in Compton, call (361) 315-4177. You’ll get a written price and an honest read on your lot.
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 Compton 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.
