Our ADU Services in Los Altos Hills
From garage conversions to ground-up backyard homes, we handle every kind of accessory dwelling unit in Los Altos Hills — design, permits, and construction under one roof.
New ADU Construction
Ground-up detached ADUs on your Saratoga lot, quoted as a single fixed-price contract before we break ground.
Garage Conversion
A fully permitted garage conversion at one locked-in price — no change orders once the contract is signed.
Detached Backyard ADU
A private backyard cottage priced as one fixed number up front, so the quote you sign is the number you pay.
Prefab & Modular ADU
A factory-built modular ADU at a fixed installed price, agreed before the unit ever leaves the plant.
ADU Design & Permitting
Design and permit management billed as one flat fee, quoted before the first drawing starts.
Junior ADU (JADU)
A compact 500 sq ft junior ADU inside your existing home, priced as a single fixed number, not an hourly estimate.
Home Additions
Room additions and second-story expansions quoted as one fixed-price contract, itemized before you sign.
Neighborhoods We Serve in Los Altos Hills
Why Saratoga Homeowners Trust Our Pricing
Every contract is fixed-price and backed by a written workmanship warranty.
Licensed & Insured
Full liability coverage
Fixed-Price Contracts
The quote is the invoice
Satisfaction Guaranteed
1-year workmanship warranty
Free Estimates
Firm numbers, not ranges
Design-Build
One contract, one contractor
Experienced Team
West Valley ADU specialists
How We Lock In Your Price
Three steps between your first call and a signed, fixed-price contract.
Free Feasibility Review
Text or call us to walk through your lot, goals, and budget. We tell you what your property can support and what it will realistically cost — no hidden ranges.
One Fixed-Price Contract
Once the design is set, we hand you a single fixed price covering design, permitting, and construction — then submit to the City of Saratoga or the County and handle every plan-check correction ourselves.
We Build to the Contract
Our licensed crews build to the price and scope you signed, keep the site clean, and hand you a permitted, move-in-ready unit — with no invoice surprises along the way.
One Fixed Price, In Writing
The number in your contract is the number you pay — no allowance games, no line items added mid-build. Every estimate below is free.
Conversion & JADU
One fixed number, agreed before we start
From $45,000
- Junior ADU (up to 500 sq ft)
- Garage-to-ADU conversion
- Uses existing structure
- Kitchenette or full kitchen
- Private entrance
- 2 - 5 month timeline
Detached Backyard ADU
Our most-quoted fixed-price contract
From $230,000
- Ground-up detached unit
- Up to 1,200 sq ft
- Independent kitchen & bath
- Separate utility metering
- Full design & permitting
- 6 - 10 month turnkey build
- 1-year workmanship warranty
Starting prices vary by ADU type, size, site conditions, and finishes — but whatever we quote you becomes the fixed number in your contract. Text or call for a free, no-obligation estimate.
Trusted Brand Partners
We Work With the Best
What Shapes Your Fixed Price
California's ADU laws set the ground rules — here's how they factor into the fixed-price contract we hand every Saratoga homeowner.
Why Approval Is Predictable
Because compliant ADUs get a ministerial 60-day decision under state law — no hearing, no neighbor veto — the timeline is predictable enough that we can commit to a fixed price before permits are even filed in Saratoga.
What Your Lot Allows
Detached ADUs are allowed up to 1,200 sq ft, junior ADUs up to 500 sq ft, and cities must permit at least 800 sq ft with only 4-foot side and rear setbacks. We confirm your lot's numbers during the free feasibility visit, before quoting a price.
Parking & Utilities, Priced In
If your property is near transit or you're converting a garage, added parking is waived. New detached ADUs can have their own utility meters, address, and lease — connection and metering costs are built into your fixed quote, not billed later.
A Known Cost, A Known Return
ADUs add significant property value and strong rental income across Santa Clara County. Knowing your build cost up front, as one fixed number, makes it far easier to run the numbers on rental income before you commit.
Frequently Asked Questions
Got questions about building an ADU in Saratoga? We've got answers.
It's a fixed-price contract, not a ballpark figure. Once we've reviewed your lot and scope, the number we put in writing is the number you pay — change orders only come up if you decide to change the scope yourself.
Why Choose Us in Los Altos Hills
Local Santa Clara County Team
We build ADUs across Los Altos Hills and know the local lot sizes, setbacks, and permitting process. Every project is designed for your specific property and jurisdiction.
Design-Permit-Build
From feasibility and design through permits and construction, we handle your Los Altos Hills ADU end to end — one licensed contractor, start to finish.
Satisfaction Guaranteed
If you are not happy with our work, we will come back and make it right at no additional charge. Your satisfaction is our priority.
Serving Los Altos Hills & the West Valley
We build ADUs, garage conversions, and additions for homeowners throughout Santa Clara County's West Valley. Find your city below for local ADU construction.
Saratoga
Our home base — full-service ADU design, permitting, and construction throughout the City of Saratoga.
Free on-site estimatesSan Jose
Detached ADUs, garage conversions, and additions for West San Jose and Cambrian homeowners near Saratoga.
Free on-site estimatesCupertino
ADU construction and garage conversions for Cupertino's tech-corridor neighborhoods and foothill lots.
Free on-site estimatesLos Gatos
Hillside-savvy ADU and addition builds for Los Gatos' sloped lots and wooded neighborhoods.
Free on-site estimatesCampbell
Backyard ADUs and home additions for Campbell's classic single-family neighborhoods.
Free on-site estimatesMonte Sereno
Custom detached ADUs and estate additions built to Monte Sereno's large-lot, hillside standards.
Free on-site estimatesSunnyvale
ADU construction and garage conversions across Sunnyvale's dense residential grid near the West Valley.
Free on-site estimatesSanta Clara
Detached ADUs, JADUs, and additions for Santa Clara homeowners west of the tech corridor.
Free on-site estimatesLos Altos
Custom ADUs and additions for Los Altos' large-lot, tree-lined neighborhoods.
Free on-site estimates