ADU New & Conversion in Marin County
Accessory dwelling units — new builds and garage/basement conversions for rental or family space.
Licensed & Insured
CA General B License CSLB #914115
Serving the Major Bay Area
Marin County, SF County, Alameda County
Permits Handled In-House
Filed, tracked & inspected for you
Free Estimates
No-obligation consultations
About our adu new & conversion work
Accessory dwelling units (ADUs) are one of the best ways to add value, rental income, or space for family to a Bay Area property. We build new detached and attached ADUs and convert garages, basements, and underused space into legal, comfortable living units.
Detached and attached accessory dwelling units (ADUs), plus garage, basement, and underused-space conversions. We handle design, permitting, utilities, and full construction to add a legal, income-producing or multi-generational living space to your property.
What's included
- Detached backyard ADUs
- Attached ADUs and junior ADUs (JADUs)
- Garage conversions
- Basement and underused-space conversions
- Utilities: separate or shared electrical, water, and sewer connections
- Kitchens, bathrooms, and full interior finish
- Permitting from start to certificate of occupancy
How it works
- Property review to see what type and size of ADU fits your lot
- Written estimate and options
- Design and plans
- Permitting with your city or county
- Construction
- Final inspection and sign-off so the unit is legal to occupy
Why homeowners choose Cutler Construction
- Licensed California General B contractor, CSLB #914115, in business since 2008.
- Fully insured, with permits and inspections handled for you.
- Free, no-obligation consultations and written estimates.
Where we offer adu new & conversion
Based in San Anselmo, we provide adu new & conversion throughout Marin County, and for home and property owners in San Francisco and Alameda Counties.
- San Anselmo
- Fairfax
- Ross
- Kentfield
- San Rafael
- Novato
- Mill Valley
- Larkspur
- Corte Madera
- Tiburon
- Sausalito
- Greenbrae
- San Francisco
- Alameda County
Common questions
Can I build an ADU on my property?
California law allows ADUs on most single-family lots, but details like setbacks, utilities, and local rules vary. We'll review your property and let you know what's possible.
Can I rent out my ADU?
In most cases, yes. Many homeowners build ADUs for rental income; others use them for aging parents, adult children, or guests.
Is a garage conversion cheaper than a new ADU?
Often it is, since the structure already exists — but it depends on the garage's condition and what upgrades are needed. We'll compare both options in your estimate.
Planning adu new & conversion?
Reach out for a free, no-obligation estimate.