A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateADU Company in Mountain View, CA
Adding an ADU in Mountain View usually means working around a 1950s or 60s ranch on a generous flat lot, with mild winters that keep foundations simpler but wet-season drainage that needs real attention. Most homeowners here are weighing rental income against family housing, and the city’s permit path for detached units is smoother than in many neighboring towns. Before you commit to a builder, you want hard numbers and a clear sense of who shows up at your door. Call (669) 444-4530 for a written estimate on any ADU or addition project in Mountain View.
Why Mountain View Homes Are Different
Mountain View’s housing stock is mostly single-story ranch homes from the 1950s and 60s, with some newer Craftsman and Mediterranean builds mixed in. Those older ranches sit on lots that are genuinely generous by Bay Area standards, which is why so many homeowners here can fit a detached ADU without eating the whole backyard. But age matters. Many of these homes need seismic retrofitting before you can safely add a second story or convert a basement, and we flag that early in the estimate so the number you see is the number you pay.
The climate shapes the work too. Mountain View gets cool, wet winters and dry summers, so roof design and drainage have to handle a real rainy season, while HVAC can stay lean because summer cooling demand is modest. In neighborhoods like Monta Loma and Rex Manor, we see a lot of detached ADUs with separate entrances aimed at young tech workers, often with higher-end finishes and smart home features that pull premium rent. That changes the finish package, the electrical scope, and the realistic budget.
Our Main Mountain View Services
Most Mountain View homeowners call us about one of three things: a full home addition, a detached or garage-conversion ADU, or a single room addition. Each has its own dedicated Mountain View page below.
Home Addition Contractor in Mountain View
Home additions in Mountain View often mean extending a 1950s ranch sideways or upward while keeping the original roofline from looking grafted on. We handle the structural tie-in, foundation match, and the seismic retrofit that older homes here frequently require before any second-story framing starts. The written price covers all of it before we lift a tool. Home Addition Contractor in Mountain View.
ADU Builders in Mountain View
Mountain View’s flat lots and streamlined detached-ADU permits make this one of the easier cities in the South Bay for a backyard unit. We work with prefab lines like Abodu and Cover as well as site-built construction, and we walk you through which approach fits your lot setbacks and your budget before you sign anything. ADU Builders in Mountain View.
Room Addition Contractor in Mountain View
A room addition in Mountain View is usually a single-bedroom or office bump-out on an existing ranch, and the main variables are foundation type, drainage, and how much of the existing wall we can reuse. We quote these as a fixed written price with the 365-Day Done Right Promise behind the work. Room Addition Contractor in Mountain View.
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 Mountain View
We install and finish ADUs from Abodu, Cover, and Tuff Shed, and we use James Hardie cladding systems on many Mountain View additions. Our brands page covers which product lines fit a given lot and budget, and our crews are familiar with each manufacturer’s install specs.
Pricing for ADU Company in Mountain View, CA
| Service | Typical range in Mountain View |
|---|---|
| Detached ADU, 400 – 800 sq ft | $180,000 – $320,000 before site work |
| Garage conversion to ADU | $120,000 – $220,000 depending on foundation and utilities |
| Home addition, 300 – 600 sq ft | $150,000 – $290,000 before site work |
| Room addition, single bedroom | $95,000 – $180,000 depending on foundation type |
| Second-story addition, 400 – 700 sq ft | $220,000 – $380,000 including seismic retrofit where required |
| Basement conversion | $130,000 – $250,000 including waterproofing and egress |
| Prefab ADU install (Abodu, Cover) | $200,000 – $340,000 all-in depending on model and site prep |
| Tuff Shed conversion to living space | $90,000 – $170,000 with insulation, electrical, and finishes |
In Mountain View, the biggest price movers are seismic retrofit requirements on older homes, lot drainage corrections, and the finish level you’re aiming for if you plan to rent to tech tenants. Every estimate is a written, locked price before work begins – no change orders slipped through later.
Neighborhoods We Serve in Mountain View
We work across Mountain View, from the mid-century ranches of Monta Loma and Rex Manor to the newer builds near downtown and the quieter streets south of El Camino. Response time for estimates in Mountain View is typically within a few business days, and we schedule site visits around your availability.
- Monta Loma
- Rex Manor
- Waverly Park
- Cuesta Park
- Old Mountain View
Service Area – Cities Near Mountain View
We serve Mountain View and the surrounding South Bay and Peninsula communities, including Cupertino, CA, Santa Clara, CA, Atherton, CA, and San Jose, CA. If you’re just outside Mountain View, call us and we’ll confirm coverage for your address.
Serving Mountain View, CA - Our Local Coverage Area
We’re based in the Mountain View 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 Mountain View
We typically schedule Mountain View estimates within a few business days of your call, and we’ll send the name and photo of the person coming before they arrive. Call (669) 444-4530 to set a time that works for you.
Yes, Mountain View requires building permits for ADUs, and the city has streamlined the path for detached units in single-family zones, particularly near the tech campuses. We pull the permits, schedule the inspections, and include that in the written price. Call (669) 444-4530 to talk through your specific lot.
Some Mountain View HOAs have design-review requirements, and older ranch neighborhoods occasionally carry setback rules that affect placement. We check the specific restrictions for your property during the free estimate so the written price reflects what’s actually buildable. Call (669) 444-4530 and we’ll walk the lot with you.
If you’re ready to put a real number on your Mountain View ADU or addition, call (669) 444-4530 for a free, written estimate. Miles Hartwell and the team will send you the name and photo of who’s coming before anyone sets foot on your property.
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 Mountain View Customers Say
"Garage conversion into a studio. They framed the insulation, added a mini split, and matched the siding. Inspectors passed everything on the first visit."
- Andrew K."They handled the drawings and the permit paperwork for us. All I had to do was pick the finishes."
- Rosa M."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.
