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
Benson ADU Builders plans and builds accessory dwelling units, home additions, and room additions across San Fernando, CA. Most San Fernando jobs start with a home built between the 1950s and 1980s: wood-frame construction, good-sized backyards, and some catch-up work on electrical panels and seismic basics. The city’s independent building department pushes backyard homes, but the rules here are specific, and older lots don’t always cooperate quietly. If you’re weighing an ADU for rental income or family, call (661) 219-7906 and we’ll walk you through what’s actually possible on your lot.
Why San Fernando Homes Are Different
San Fernando’s housing stock runs modest and single-family, most of it poured and framed between the 1950s and 1980s. That means big backyards, good for a detached ADU, but also wood-frame bones that may need seismic strapping or a panel upgrade before the city signs off. The local climate is hot and dry; summers regularly cross 90°F, so any ADU we permit here has to meet Title 24 energy standards with real insulation, cool roofing, and HVAC sized correctly. Homes in wildfire-adjacent zones also carry defensible space requirements, which can move a structure a few feet one way or another.
The San Fernando hook is the city’s own building department, which actively encourages ADUs but keeps a ceiling at 1,200 square feet. On many lots, especially older pre-1980s parcels, a JADU is a practical option, though owner-occupancy is often required for those. In the neighborhoods east of Truman Street, original 100-amp panels are common, so a garage conversion frequently starts with a main panel upgrade. That’s an expense we flag in the first written estimate, not after demo starts.
Our Main San Fernando Services
San Fernando homeowners usually reach out about one of three things: building a new ADU, extending the home, or adding a single room. Each service has its own page with pricing and San Fernando-specific details.
ADU Builders in San Fernando
ADUs in San Fernando are shaped by the city’s 1,200-square-foot cap and its push for backyard homes on pre-1980s lots. We plan around setbacks, lot coverage, and the owner-occupancy rules that often attach to JADUs. For homeowners east of Truman Street with original 100-amp panels, we price the panel upgrade into the job from day one so it’s not a discovery later. We build with leading prefab brands, which keeps site time shorter on tight properties. See what’s possible on your lot: ADU Builders in San Fernando
Home Addition Contractor in San Fernando
A home addition in San Fernando means tying new square footage into a house built decades ago. Wood-frame construction from the 1950s to 1980s is forgiving, but seismic retrofitting and insulation upgrades are usually part of the scope, especially with the Valley’s summer heat. We handle the full set: plans, permits, foundation, framing, roofing, and the Title 24 energy details the city checks closely. Details and local pricing: Home Addition Contractor in San Fernando
Room Addition Contractor in San Fernando
A single room addition, a bedroom, a home office, or a dining room, costs less than a full addition but still has to meet San Fernando’s energy and seismic standards. On older homes, we often find original 100-amp electrical service, so a panel upgrade may ride along. We write the full job, including any utility work, into the price before work starts. See what a room addition runs here: 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
We build with prefab and materials brands homeowners can research on their own: Mighty Buildings, Boxabl, and Plant Prefab come up often for San Fernando lots because panelized builds shorten on-site time in summer heat. Tuff Shed structures are another option for certain backyard builds. See the full lineup on our brands page.
Pricing for ADU Company in San Fernando, CA
San Fernando ADU and addition jobs run on the higher end of the Southern California range because of panel upgrades, seismic detailing, and Title 24 requirements. Here are the ballpark ranges we write into San Fernando estimates.
| Service | Typical range in San Fernando |
|---|---|
| Detached ADU (site-built, 500 – 800 sq ft) | $195,000 – $310,000 |
| Detached ADU (prefab, 400 – 600 sq ft) | $145,000 – $210,000 |
| Garage conversion ADU (300 – 500 sq ft) | $105,000 – $165,000 |
| JADU (interior conversion, up to 500 sq ft) | $55,000 – $95,000 |
| Attached ADU addition (500 – 700 sq ft) | $135,000 – $205,000 |
| Home addition (400 – 800 sq ft) | $165,000 – $290,000 |
| Home addition (800 – 1,200 sq ft) | $265,000 – $410,000 |
| Room addition (single room, 200 – 400 sq ft) | $55,000 – $115,000 |
| Second-story addition (500 – 900 sq ft) | $210,000 – $365,000 |
What pushes a San Fernando price up is usually a main panel upgrade, seismic strapping on an older frame, or defensible space adjustments on a wildfire-adjacent lot. What doesn’t change is our pricing structure: a written price before any work starts, with no scope creep billed after the fact. Call (661) 219-7906 and we’ll give you a real number, not a shrug.
Neighborhoods We Serve in San Fernando
Crews serve San Fernando from the brand’s Los Angeles office, and response times for local estimates run short because the service area is compact. If you’re in one of the neighborhoods below, you’ll see us regularly.
- Pacoima Hills
- Truman Street area
- Mission Corridor
- North San Fernando
- Casa Torres area
Service Area – Cities Near San Fernando
Along with San Fernando itself, our crews regularly work in Sylmar, CA, Mission Hills, CA, Granada Hills, CA, and Panorama City, CA. If you’re just over the border, the same written-price guarantee applies.
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
Planning and permitting in San Fernando moves at the city’s pace, but we begin with a site visit and a written price within days of your call. Prefab builds shorten the on-site phase because panels arrive pre-cut. Call (661) 219-7906 to set a free estimate.
If your home is east of Truman Street and still runs a 100-amp panel, very likely yes. We include that in the initial written estimate so it’s not a surprise line item later. Permits go through San Fernando’s building department, and we pull them.
Yes. We serve the full San Fernando city area, from the foothill edges to the Mission Corridor. Every job follows the same rule: a written price before work starts, and a live person on the phone when you call. Reach us at (661) 219-7906 for a free estimate.
For a written price on an ADU, home addition, or room addition in San Fernando, call (661) 219-7906 today. Estimates are free, and the number on the quote is the number you’ll pay.
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
"Home addition blends in with the original house."
- Vic S."Fixed quote and clear change orders approved by text."
- Trina M."Photos of each milestone, which I loved. Slab, framing, roof dry-in, each one came with a few pictures by text."
- Gwen D.
