ADU Company in Stevenson Ranch, CA
We handle accessory dwelling units (ADUs, which are just secondary homes built on a lot you already own), garage conversions, and home additions throughout Stevenson Ranch. This is unincorporated Los Angeles County, which means your permits go through county offices rather than Santa Clarita’s. That catches a lot of people off guard. It also means the HOA is usually your first obstacle, not the county. If you’ve been circling the idea of adding space and want a written price before anything starts, call (254) 602-5618.
Why Stevenson Ranch Homes Are Different
Stevenson Ranch is nearly all 1990s and early 2000s master-planned tract construction. Mediterranean and Spanish-style stucco homes, attached two-car garages, uniform setbacks, and rear yards that are tighter than most of LA County. That last part matters more than people expect. A detached ADU needs lot-coverage room, and many Stevenson Ranch parcels simply do not have it. Garage conversions, by contrast, work almost everywhere here because the footprint already exists.
The other wildcard is fire. Stevenson Ranch borders brushy hillside terrain, and the 2003 fire destroyed dozens of homes in this community. Many parcels now sit inside Very High Fire Hazard Severity Zones. Any new ADU structure must meet ignition-resistant exterior standards and ember-resistant venting, and those requirements add real line items to a bid that a contractor who hasn’t built here might not include until a change order shows up mid-project. That’s a big reason we put the price in writing before work starts.
Our Main Stevenson Ranch Services
Stevenson Ranch homeowners call us most often about two things: converting the attached garage into living space, and building a detached ADU where the lot allows it.
Home Addition Contractor in Stevenson Ranch
A home addition in Stevenson Ranch means matching the existing stucco, roofline, and architectural style of a 1990s Mediterranean tract home closely enough that the addition doesn’t look like an afterthought. Most additions here are bump-outs for a larger kitchen or primary suite. The HOA will ask questions, and the county’s plan check will too. We’ve worked through enough Stevenson Ranch additions to know where the process stalls and how to keep it moving. Home Addition Contractor in Stevenson Ranch
Garage Conversion Contractor in Stevenson Ranch
Because Stevenson Ranch was built around the attached two-car garage, a garage conversion is the fastest and most cost-efficient way to add a studio, home office, or in-law suite. You’re working inside an existing foundation and roofline, which keeps structural work modest. The fire-zone requirements still apply to any new wall, window, or vent opening we touch. Garage Conversion Contractor in Stevenson Ranch
ADU Builders in Stevenson Ranch
Where the rear yard has room, a detached ADU gives Stevenson Ranch homeowners a fully separate rental unit or guest house. Prefab options from Abodu and Cover often make sense here because off-site framing trims construction time and keeps the job site cleaner on a constrained lot. The county’s fire-zone review is the gatekeeper, and we prepare plans with those ember-resistance and ignition-resistance specs from the first drawing. ADU Builders in Stevenson Ranch
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 Stevenson Ranch
We install and finish units from Abodu, Cover, James Hardie, and Dvele across Stevenson Ranch. Siding, trim, venting, and fire-rated assemblies we typically order locally. Most brand-specific parts arrive within the standard vendor lead time. See our brands for the full list.
Pricing for ADU Company in Stevenson Ranch, CA
| Service | Typical range in Stevenson Ranch |
|---|---|
| Site prep and foundation for a detached ADU | $8,000 – $25,000 |
| Permit and plan fees, LA County processing | $2,500 – $6,500 |
| Demolition and rough carpentry | $4,000 – $12,000 |
| Insulation and drywall | $2,500 – $7,500 |
| Basic electrical rough and finish | $2,500 – $6,500 |
| Basic plumbing rough and finish | $2,500 – $6,500 |
| Fire-rated cladding and ember-resistant venting | $3,500 – $9,000 |
| Window and door replacements | $3,000 – $10,000 |
| Roofing patch or tie-in | $1,800 – $5,500 |
| Interior trim and paint | $2,500 – $7,000 |
| Flooring installation | $2,000 – $6,000 |
| Bathroom fixture installation | $2,000 – $6,000 |
Two things push Stevenson Ranch prices higher than the countywide average: fire-zone exterior materials and the HOA pre-approval process, which adds time even when it doesn’t add hard costs. Our price gets written down before work starts, and it doesn’t change at the door.
Neighborhoods We Serve in Stevenson Ranch
We cover the whole Stevenson Ranch planning area. Most of our ADU and garage conversion work clusters in a handful of master-plan tracts with slightly different lot shapes and HOA boards, but the county process is the same across all of them. Typical response for an estimate visit in Stevenson Ranch is one to three business days depending on our schedule that week.
- Stevenson Ranch (central tracts)
- Westridge
- Pico Canyon area
- Southern Oaks
Service Area – Cities Near Stevenson Ranch
We regularly take calls from Stevenson Ranch homeowners and from neighboring communities that share the same Santa Clarita Valley corridor. That includes Newhall, CA, Valencia, CA, Santa Clarita, CA, and Castaic, CA. Same county rules for most of these, but each city has its own plan-check quirks.
Serving Stevenson Ranch, CA - Our Local Coverage Area
We’re based in the Stevenson Ranch 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 Stevenson Ranch
Yes. Most Stevenson Ranch parcels fall inside a Very High Fire Hazard Severity Zone, so we design every ADU and conversion with ignition-resistant exteriors and ember-resistant venting from the first plan set. Those requirements are routine for us here.
They might try. Many Stevenson Ranch HOAs operate under pre-2020 CC&Rs, but California law under AB 68 and SB 13 strips HOA authority to reject a compliant ADU. We show up to the HOA conversation with the printed statutory language so the approval letter doesn’t stall your project.
Once you’ve approved your written scope and the permit paperwork goes in, the county’s review timeline sets the pace. Plan check for an ADU in LA County typically runs several weeks to a few months depending on workload. Call (254) 602-5618 if you want us to walk through your specific timeline.
If you’re thinking about an ADU, garage conversion, or addition in Stevenson Ranch, call (254) 602-5618 for a free estimate and a written price before any work begins.
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 Stevenson Ranch Customers Say
"Junior ADU conversion inside the house. They protected the rest of our place with plastic and daily cleanup. Done nearly on schedule and on the number they quoted."
- Sabrina Veld"Garage conversion into an office and guest room. Fair written price, finished close to on schedule, and they fixed a small drywall crack under warranty months later without any hassle."
- Diana Cho"The ADU came out beautiful and the permitting, which terrified me, was handled start to finish. They kept me updated every week so I was never wondering what was happening."
- Shauna Mills