A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateADU Company in South Gate, CA
Adding an ADU in South Gate usually costs between $180,000 and $420,000 for a detached unit, and most projects move through the city’s streamlined 2021 ADU ordinance in four to seven months from design to final inspection. The lots here, mostly 5,000 to 7,000 square feet with post-war stucco homes, are well suited to backyard units, and the flat terrain keeps foundation work simpler than in hillside cities nearby. We coordinate every South Gate project through Ben Ortega and our Los Angeles office, and you can reach us at (213) 449-7136 any time.
Why South Gate Homes Are Different
South Gate’s housing stock is largely single-story stucco tract homes built between the 1940s and late 1960s, set on rectangular lots with rear yards that comfortably hold 800 to 1,200 square foot ADUs. Many of these homes still have their original detached garages at the alley, and those garages are often the first place families look when they want more living space without touching the main house.
The climate helps the work move year round. Mild winters mean crews can pour foundations and frame walls in almost any month, though summer days that push past 90°F make insulation and ventilation choices matter more than they do in coastal neighborhoods. South Gate’s flat terrain and low flood risk also simplify foundations, unlike parts of the LA River floodplain nearby. The one thing that catches most South Gate homeowners off guard is the sewer lateral. Older laterals here are known for root intrusion and offset joints, and roughly a full lateral replacement to the main is needed on many ADU projects. That adds $5,000 to $10,000 and several weeks of permitting that many first-time builders never budget for.
Our Main South Gate Services
South Gate homeowners most often call us about two things: converting an existing garage into living space, and building a detached ADU in the rear yard. A home addition is the third path, and each service has its own South Gate page with pricing and timelines.
Home Addition Contractor in South Gate
A home addition in South Gate typically means expanding the footprint of a 1950s or 1960s stucco home, often a new primary suite or a family room that opens to the backyard. The flat lots make ground-floor additions more practical than in hillier cities, but the same sewer lateral issues apply when you add a bathroom, and we plan for that from the first site visit. Every addition starts with a written price before any work begins. Learn more about how we handle Home Addition Contractor in South Gate work.
Garage Conversion Contractor in South Gate
South Gate’s detached alley-facing garages are ideal conversion candidates. The structure is already there, the foundation is usually sound, and the work can stay out of the main house for most of the project, which matters when kids and pets are living through the build. We pay close attention to insulation in these jobs, because a garage built in the 1950s was never meant to be lived in during a South Gate summer. See what a Garage Conversion Contractor in South Gate project involves.
ADU Builders in South Gate
Backyard ADUs are the go-to choice on South Gate’s 5,000 to 7,000 square foot lots, where a detached unit leaves the main house untouched and adds a genuinely separate home on the same parcel. The city’s 2021 ADU ordinance streamlined approvals for detached units, and our team handles the design, permits, foundation, and the connection work that South Gate’s older utilities demand. The full picture is on our ADU Builders in South Gate 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 South Gate
We work directly with the prefab and modular brands South Gate families research before calling anyone, including Cover, Dvele, Mighty Buildings, and Boxabl. Parts and panel kits are ordered to the site, and we coordinate delivery so materials don’t sit unprotected in a South Gate summer. Full details are on our brands page.
Pricing for ADU Company in South Gate, CA
| Service | Typical range in South Gate |
|---|---|
| Detached ADU (800-1,200 sq ft) | $180,000 – $420,000 |
| Garage conversion (400-650 sq ft) | $120,000 – $210,000 |
| Home addition (400-800 sq ft) | $160,000 – $320,000 |
| Two-car garage conversion | $180,000 – $265,000 |
| Steel-frame ADU | $160,000 – $280,000 |
| Wood-frame ADU (turnkey) | $250,000 – $390,000 |
| Two-bedroom ADU | $220,000 – $390,000 |
| One-bedroom ADU | $150,000 – $220,000 |
| Studio ADU | $110,000 – $170,000 |
| Sewer lateral replacement (when required) | $5,000 – $10,000 |
The biggest price variables in South Gate are the sewer lateral condition and whether the existing garage foundation can support a conversion or needs reinforcement. Whatever the number is, you’ll see it in writing before any work starts, with no surprise line items added after crews arrive.
Neighborhoods We Serve in South Gate
We work across all of South Gate, from the streets north of Firestone Boulevard down to the neighborhoods along Tweedy Boulevard and east toward the Los Angeles River. The lots and home styles are consistent, which means our pricing stays predictable.
- Hollydale
- South Gate Park area
- Stanford Avenue corridor
- Tweedy Boulevard neighborhoods
- Firestone Boulevard corridor
Service Area – Cities Near South Gate
While this page focuses on South Gate, our crews also serve surrounding communities. You can find city-specific pricing and local detail for Los Angeles, CA, South Pasadena, CA, El Segundo, CA, and Marina del Rey, CA.
Serving South Gate, CA - Our Local Coverage Area
We’re based in the South Gate 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 South Gate
Most detached ADUs in South Gate take four to seven months from design through final inspection. The city’s 2021 ADU ordinance streamlined approvals, but sewer lateral work and utility connections can add weeks that are better planned for up front.
Many South Gate homes do, because the older laterals are prone to root intrusion and offset joints. If yours needs replacement, it adds $5,000 to $10,000 and a few weeks of permitting. We inspect the lateral during the estimate so the written price reflects reality.
Yes. Every ADU, garage conversion, and home addition we build in South Gate is permitted through the city, and we handle the submittals, corrections, and inspections. You’ll see permit status in writing before construction begins. Call (213) 449-7136 for a free estimate on your project.
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 South Gate Customers Say
"Built a backyard unit for us. For a months long project the crew kept the site remarkably tidy, swept daily, and were respectful of our neighbors and our dog. Beautiful result."
- Charlotte Vey"Quality ADU. Communication was good overall, with one quiet stretch during the inspection wait where I had to check in. Once moving again they were tidy and quick to finish."
- Noelle Friedman"Garage conversion into a studio. They sealed off the work area so dust didn't get into the house, and cleaned up every day before leaving. Calm, careful team to have around."
- Darnell Hobbs
