A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateADU Company in Chatsworth, CA
Chatsworth is one of the few places in the San Fernando Valley where a big backyard is still the norm, not the exception. That changes everything about how we plan an ADU here. Most homes sit on large mid-century ranch lots, many with horse-keeping zoning, which means detached units usually have room to breathe without fighting setback rules the way they do in tighter Valley neighborhoods. The dry, hot summers and Santa Ana wind season also push us toward fire-resistant cladding and smarter ventilation from the first sketch. If you’re weighing an ADU, a garage conversion, or an addition on a roomy Chatsworth property, call us at (559) 282-2291 and we’ll put a written price in front of you before any work starts.
Why Chatsworth Homes Are Different
Chatsworth’s housing stock is dominated by mid-century ranch homes on generous lots, and a meaningful share of them carry horse-keeping zoning. That’s not a quirk; it’s the defining feature of building here. In equestrian-zoned areas, homeowners often have the option to convert an existing stable or barn into a habitable unit, or to place a detached ADU far enough from the main house that it barely changes how the property feels. A project like that requires digging into accessory-structure rules that most contractors in the Valley never touch. We have.
The climate also shapes materials decisions. Summers regularly push past 100 degrees, and when the Santa Anas blow through the foothills, anything built with cheap siding or poor ventilation becomes a liability. We specify fire-resistant exterior products and design roof and wall assemblies that hold up to both the heat and the wind. Hillside lots add another layer: grading, drainage, and access for crews and panels all have to be worked out before the first inspection. Chatsworth rewards planning ahead, and that’s exactly the kind of project we like to take on.
Our Main Chatsworth Services
Most Chatsworth homeowners call us about one of three projects: building a new ADU, adding square footage to the main house, or converting underused space like a garage into a functional room.
ADU Builders in Chatsworth
A detached ADU on a half-acre Chatsworth lot is one of the cleanest ways to add rental income or a private space for family without touching the main house. We handle site-built and prefab options, including units from ADU Builders in Chatsworth brands like Abodu and Cover, which can compress the construction timeline considerably. On equestrian lots we often work around existing barns and corrals, and we know how to keep the rural character intact while adding a legal second unit.
Home Addition Contractor in Chatsworth
When the ranch house itself needs more room, a home addition usually makes more sense than moving. Chatsworth’s sprawling footprints give us options: a new wing off the back, a larger kitchen that opens to the yard, or a second story on a hillside home. Fire-resistant materials and proper insulation matter more here than in coastal neighborhoods. See how we approach home additions in Chatsworth, including written pricing before demo day.
Room Addition Contractor in Chatsworth
Sometimes the need is smaller: a bedroom, a home office, or a family room that converts dead space into something useful. Room additions in Chatsworth often work well as garage conversions or bump-outs on ranch homes where the original floor plan ran long and narrow. We quote these with the same fixed, written price we use on full ADUs. Learn more about room additions in Chatsworth.
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 Chatsworth
We build with and service units from Tuff Shed, James Hardie, Abodu, and Cover. When a Chatsworth homeowner already owns one of these structures or wants us to spec one, we can. See our brands for the full list and what each one does best.
Pricing for ADU Company in Chatsworth, CA
| Service | Typical range in Chatsworth |
|---|---|
| Detached ADU (site-built, 600 – 800 sq ft) | $180,000 – $290,000 |
| Detached ADU (prefab, e.g. Abodu or Cover) | $140,000 – $240,000 |
| Garage conversion ADU | $90,000 – $160,000 |
| JADU (junior ADU, attached) | $70,000 – $120,000 |
| Barn or stable conversion to living unit | $120,000 – $220,000 |
| Home addition (400 – 800 sq ft) | $150,000 – $320,000 |
| Room addition (single room, 200 – 400 sq ft) | $55,000 – $120,000 |
| Second-story addition | $200,000 – $400,000 |
| Detached home office or studio | $45,000 – $95,000 |
| Site work, grading, and drainage on hillside lots | $15,000 – $45,000 |
Hillside grading, fire-resistant cladding, and horse-property permitting can all push a Chatsworth project toward the higher end of these ranges. Every estimate we give is a written, fixed price before work begins, so the number you approve is the number you pay.
Neighborhoods We Serve in Chatsworth
We work across Chatsworth, including the ranch-heavy pockets around the equestrian zones, the hillside streets near the Santa Susana foothills, and the more suburban grid south of the 118. Our crews come from the Los Angeles office and typically reach most Chatsworth homes within the same scheduling window.
- Equestrian neighborhoods near Chatsworth Park South
- Hillside streets north of the 118
- Ranch-style tracts around Mason Avenue
- Areas near Chatsworth Reservoir
- Neighborhoods south of Devonshire Street
Service Area – Cities Near Chatsworth
If you’re just over the Chatsworth line, we also cover Northridge, CA, Winnetka, CA, Canoga Park, CA, and Reseda, CA. Each area gets the same written-price guarantee and 365-Day Done Right Promise.
Serving Chatsworth, CA - Our Local Coverage Area
We’re based in the Chatsworth 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 Chatsworth
Most Chatsworth ADUs land between $90,000 for a garage conversion and $290,000 for a larger site-built detached unit. Horse-property conversions and hillside work can push higher. Call (559) 282-2291 for a written quote specific to your lot.
Yes. Lots with horse-keeping zoning often have accessory-structure rules that standard residential lots don’t, especially when a barn or stable is being converted. We handle the permit package and know which questions the city will ask before you pay for drawings.
No. Every Benson ADU Builders project comes with a written price before any work begins, and we don’t bill for surprises after the fact. If something changes, you approve it in writing first. Call (559) 282-2291 for a free estimate.
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 Chatsworth Customers Say
"Room addition off the kitchen. Framing, drywall, and paint all done well."
- Wade L."Fixed quote and clear change orders approved by text."
- Trina M."Communication was the best part. I always knew what was happening that week without having to ask."
- Dolly N.
