A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateADU Company in San Fernando, CA
An ADU in San Fernando usually costs between $165,000 and $385,000 for a full build, with prefab units from brands like Cover, Boxabl, and Dvele often landing in the $185,000 to $320,000 range including site work. Most San Fernando properties sit on flat, rectangular lots with rear yards that have clear alley or side access, which keeps crane and foundation costs more predictable than hillside or canyon builds. We’re a San Fernando ADU company that puts the full price, the timeline, and the brand options in writing before you commit – call (903) 568-7222 for a free estimate and you’ll know the ballpark on the first call.
Why San Fernando Homes Are Different
San Fernando’s housing stock leans heavily toward mid-century single-story homes built between the 1940s and 1970s, most on standard 5,000 to 7,500 square foot lots. That age matters for ADU work in a few ways you won’t see on newer builds. Older panels often sit at 100 amps, so a detached ADU with its own mini-split and electric appliances can require a panel upgrade before drywall ever goes up. We scope that cost into the written estimate up front instead of discovering it mid-project. Galvanized supply lines and cast iron waste lines are common in the city’s older neighborhoods, and tying a new ADU into aging plumbing usually means budgeting for a repipe section at the property line.
Climate works in your favor here. San Fernando’s dry, hot summers and mild rainy seasons mean we can pour foundations and hang siding nearly year-round, with only occasional rain delays in January and February. That’s a real scheduling advantage compared to coastal or mountain communities. Some San Fernando neighborhoods also have older deed restrictions or lot line quirks that don’t show up on a standard parcel map, so we always pull the title’s full conditions and covenants before we quote. It costs you nothing and prevents a setback surprise months into the project. The ADU rules themselves follow California state law, which overrides most local zoning limits on things like minimum lot size and owner occupancy.
Our Main San Fernando Services
Most San Fernando homeowners call us first about one of three things: building a detached ADU for rent or family, expanding the main house’s footprint, or converting an unused room into real living space. Each of those is its own project with its own page below.
ADU Builders in San Fernando
A detached ADU in San Fernando typically works best as a one- or two-bedroom unit across the back of the lot, where it stays clear of the house’s existing setbacks. We start by verifying your lot’s specific setback rules and utility access, then build out either a site-framed unit or a prefab from Cover, Dvele, Boxabl, or Mighty Buildings. Prefab usually trims four to eight weeks off a site-built schedule in San Fernando because the modules arrive pre-inspected and get craned into place over two or three days. Full details, including how long your specific lot will take, are on the dedicated page.
Home Addition Contractor in San Fernando
Home additions in San Fernando usually mean pushing a flat backyard or side yard into livable square footage. Single-story bump-outs are the most common job we quote here, often for a larger kitchen, a primary suite, or a family room that doesn’t feel like a hallway anymore. Tying the new roofline into an existing mid-century home takes a framing crew that’s done it before – bad transitions leak, and San Fernando’s occasional hard winter rain finds those seams fast. We pull all structural permits and handle the plan checks through the city, so the only thing you do is pick the finishes.
Home Addition Contractor in San Fernando
Room Addition Contractor in San Fernando
A room addition in San Fernando is the lighter version of a full home addition: a single bedroom, office, den, or guest suite added onto the existing footprint. These projects stay smaller in scope, which means they often clear the city’s plan check process faster than a full second-story or large footprint expansion. Because so many San Fernando homes are single-story, a room addition rarely needs structural reinforcement of the floor below, but foundation trenches still need compaction testing. We show you copies of every inspection report through our live tracking portal, so you see exactly what the city inspector sees.
Room Addition Contractor in San Fernando
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 San Fernando
San Fernando homeowners can choose from a curated set of prefab and materials brands we’re authorized to build with, including Cover, Dvele, and Boxabl. Each brand has different lead times and factory backlogs that change monthly, so when we quote your San Fernando ADU we tell you exactly which brands are available now and what that does to your schedule. See the full list on our brands page.
Pricing for ADU Company in San Fernando, CA
| Service | Typical range in San Fernando |
|---|---|
| Detached ADU (1-bed, prefab modular) | $185,000 – $265,000 |
| Detached ADU (2-bed, prefab modular) | $235,000 – $320,000 |
| Detached ADU (site-built, 1-bed) | $195,000 – $285,000 |
| Detached ADU (site-built, 2-bed) | $265,000 – $385,000 |
| Garage conversion ADU (400 – 600 sq ft) | $95,000 – $165,000 |
| JADU (attached, under 500 sq ft) | $85,000 – $140,000 |
| Home addition (single-story, 300 – 600 sq ft) | $165,000 – $310,000 |
| Room addition (bedroom or office, 150 – 250 sq ft) | $75,000 – $145,000 |
| Panel upgrade (100A to 200A) | $4,500 – $8,500 |
| Foundation repair (if existing slab is compromised) | $6,000 – $24,000 |
The biggest price drivers in San Fernando are panel capacity, sewer line condition, and whether the city requires fire sprinklers on your specific lot. Prefab units from Boxabl or Dvele can cut labor cost but add factory freight, so the net savings vary by site. Every estimate we give is a written, line-item price before any work begins – no verbal “around this much” and no change order after the fact.
Neighborhoods We Serve in San Fernando
We work across the entire city of San Fernando, from the dense blocks near the San Fernando Mission to the residential streets east of the 118. Our crews know the older lot layouts well enough that initial site walks usually take under an hour. We’re normally able to schedule a San Fernando estimate within a few business days.
- City Center / Mission area
- Pacoima Wash corridor
- East San Fernando residential district
- North of San Fernando Road
- South of the 118
Service Area – Cities Near San Fernando
If you’re just outside the San Fernando city limits, we also quote projects in the surrounding San Fernando Valley communities. You’ll find the same upfront written pricing and brand options whether you’re in Granada Hills, CA, Northridge, CA, Van Nuys, CA, or Newhall, CA. Scheduling is coordinated through our Los Angeles office, with crews dispatched to San Fernando and the Valley daily.
Serving San Fernando, CA - Our Local Coverage Area
We’re based in the San Fernando 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 San Fernando
Most San Fernando homeowners get an estimate within two to four business days of calling. The site walk itself usually takes under an hour on San Fernando’s flat residential lots, and you’ll receive the written, line-item price by email or our tracking portal afterward. Call (903) 568-7222 to set up a date that works for your schedule.
San Fernando follows California’s state ADU law, which supersedes most local zoning restrictions, but the city still reviews plans for building-code compliance and any heritage or lot-line conditions. Older deed restrictions on a minority of San Fernando parcels can add extra review time. We check the title’s conditions and covenants before quoting so nothing shows up late and surprises you.
We serve the entire city of San Fernando, every neighborhood and zoning district. That includes all residential blocks from the Mission area to the neighborhoods bordering the 118. The page above lists representative neighborhoods, but if you’re anywhere inside San Fernando city limits, we’ll come out for a free estimate.
If you’re ready to get a real number for your ADU or addition in San Fernando, call (903) 568-7222 and speak with a live person. We’ll schedule your free estimate, walk the property, and put the written price in your hands before any work starts.
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 San Fernando Customers Say
"Booked a consult online and met the project manager two days later. Weekly progress updates arrived by text with photos. ADU finished on schedule."
- Hannah W."Clean, quiet crew. They respected the neighbors, kept noise to working hours, and swept the driveway every evening."
- Hope C."Communication was the best part. I always knew what was happening that week without having to ask."
- Dolly N.
