A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateADU Company in Mission Hills, CA
Adding an ADU in Mission Hills means working with early-1900s homes, small lots, and the city’s Historic Preservation Overlay Zone. Most projects here are garage conversions or second-story additions rather than freestanding backyard units, because the original lots rarely leave room for anything else. We handle the foundation issues, the design work, and the permit path so your added square footage fits both the street and the rules. If you’re weighing options, call (661) 430-0429 and we’ll give you a straight read on what your lot can support.
Why Mission Hills Homes Are Different
Mission Hills is built from Craftsman and Spanish Colonial Revival homes that date to the 1910s and 1920s. That means three things on nearly every ADU job. First, the foundations are old, and adding a second story or converting a garage usually means we’re reinforcing, not just framing. Second, the lots were laid out long before modern parking rules, so many garages sit at the rear property line with only alley access and a tight turning radius. Third, the Historic Preservation Overlay Zone limits what you can change on the street-facing side of the house, which pushes most ADU work to the back of the lot or into existing structures.
Climate is less of a fight here. The Mediterranean pattern – warm, dry summers and cool, wet winters – means you don’t need heavy insulation or air conditioning. What you do need is cross-ventilation, a heating source for winter mornings, and honest weatherproofing for the intense rainstorms that hit a few times each winter. We’ve seen more weather damage from two bad storm weeks than from a whole Mission Hills summer.
Our Main Mission Hills Services
Homeowners in Mission Hills typically call us about two things: converting garage or interior space into an ADU, and expanding the main house with an addition. Each service has its own Mission Hills page with pricing and specifics, linked below.
Home Addition Contractor in Mission Hills
Home additions in Mission Hills usually mean going up rather than out, because the side yards on these lots are often five feet or less. A master suite addition over an existing Craftsman wing requires engineering for the old framing and foundation below, plus design work that keeps the roofline from shouting over the original architecture. We coordinate the structural work, the Historic Preservation Overlay review when it applies, and the finish details. See pricing and scope on the Home Addition Contractor in Mission Hills page.
ADU Builders in Mission Hills
Most Mission Hills ADUs are attached conversions or garage conversions, because the rear-yard space isn’t there for a freestanding unit. The original 1920s detached garages are too narrow for modern cars, and many sit on the property line with alley-only access, which creates zero-lot-line conditions we have to design around from day one. Knob-and-tube wiring and non-conforming lot coverage come up regularly. Read the full breakdown on the ADU Builders in Mission Hills page.
Room Addition Contractor in Mission Hills
A room addition on these small lots usually means a bump-out off the kitchen or a rear-facing addition that doesn’t touch the street-side elevation. The challenge is matching the existing plaster walls, wood windows, and baseboard profiles so the new room doesn’t look glued on. We also handle the foundation tie-in, because a Mission Hills house from the 1920s settles differently than a new slab will. Details and pricing live on the Room Addition Contractor in Mission Hills 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 Mission Hills
We work with several prefab and modular ADU lines, including our brands page partners like Dvele, Cover, and Mighty Buildings. For Mission Hills specifically, where lots are tight and design review is strict, we typically recommend one of these factory-built systems rather than a full custom build, since they shorten the on-site timeline and keep the Historic Preservation Overlay process simpler.
Pricing for ADU Company in Mission Hills, CA
| Service | Typical range in Mission Hills |
|---|---|
| Freestanding ADU (400 – 600 sq ft, prefab) | $180,000 – $270,000 |
| Freestanding ADU (600 – 800 sq ft, prefab) | $270,000 – $340,000 |
| Freestanding ADU (800 – 1,000 sq ft, prefab) | $340,000 – $420,000 |
| Garage conversion ADU (existing structure) | $120,000 – $220,000 |
| Attached ADU addition (new build) | $200,000 – $360,000 |
| Second-story ADU over existing footprint | $250,000 – $400,000 |
| Room addition (400 – 600 sq ft, site-built) | $150,000 – $240,000 |
| Room addition (600 – 800 sq ft, site-built) | $240,000 – $340,000 |
| Foundation reinforcement (existing garage or home) | $15,000 – $45,000 |
| Alley-access site work and utility trenching | $8,000 – $30,000 |
What pushes a Mission Hills ADU toward the top of these ranges is usually the foundation: a 1920s garage sitting at the rear lot line with no modern footing will need real structural work before walls go up. Alley access adds cost too, since materials and equipment have to come in from the back. Every project starts with a written price before any work begins, so you’re not guessing when the estimate arrives.
Neighborhoods We Serve in Mission Hills
We work throughout Mission Hills and the surrounding San Fernando Valley communities. Most of our Mission Hills projects are in the historic core near Sepulveda Boulevard and the blocks east of the 405, but we also serve the quieter residential streets further north and the areas that border Panorama City and Granada Hills.
- Mission Hills Historic Core
- East Mission Hills (near the 405)
- North Mission Hills
- South Mission Hills (near Devonshire Street)
- Mission Hills foothill streets
Response times for estimates in Mission Hills are typically within 2 to 3 business days, depending on how many site visits we have scheduled that week.
Service Area – Cities Near Mission Hills
Beyond Mission Hills, we serve the surrounding San Fernando Valley cities with the same written-price standard. That includes San Fernando, CA just north, Granada Hills, CA to the west, Panorama City, CA to the south, and Sylmar, CA further north along the 210.
Serving Mission Hills, CA - Our Local Coverage Area
We’re based in the Mission Hills 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 Mission Hills
Once we have your written go-ahead, design and permit work for a Mission Hills ADU typically runs six to ten weeks before construction starts. Historic Preservation Overlay review can add time if your project touches a street-facing elevation. Call (661) 430-0429 for a timeline specific to your lot.
Yes, if your home sits inside the Historic Preservation Overlay Zone. Projects that change the front elevation or add visible square footage from the street go through additional design review. Conversions at the rear of the lot with no street visibility usually clear faster. We handle the full permit path for you.
For most Mission Hills projects, yes – we walk the lot, check the foundation and alley access, and then give you a written price. That’s the Threshold Standard: a number on paper before a single tool is lifted, with no surprise invoices later. Call (661) 430-0429 to schedule the walkthrough.
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 Mission Hills Customers Say
"They handled the drawings and the permit paperwork for us. All I had to do was pick the finishes."
- Rosa M."Itemized estimate with allowances laid out. Final cost was within a hair of the quote."
- Naomi R."Every crew member was vetted and carried a badge, which matters when they are around your family for months. Tidy site every day."
- Daniel F.
