Marin County ADU Developer — Garage, Home, and Backyard Conversions.
About SYMBiHOM in Marin County
Marin County homeowners have access to one of California's most supportive ADU environments — fee waivers through December 2026, a county-wide ADU resource center at ADUMarin.org, and a multi-jurisdictional pre-approved plans gallery covering 10 cities, towns, and unincorporated Marin. SYMBiHOM is a CA HCD approved ADU Design-Build Developer serving Marin County homeowners with garage conversions, home conversions, and backyard ADUs.
Our Credentials in Marin County
SYMBiHOM holds CA HCD approval and is actively pursuing pre-approved vendor status across Marin County jurisdictions. Marin County currently offers ADU building permit fee waivers and reductions through December 31, 2026 — a meaningful cost reduction for homeowners moving now.
Permitting in Marin County
ADUMarin.org is a multijurisdictional partnership covering 10 cities, towns, and the County of Marin. The program offers step-by-step guidance, off-the-shelf pre-approved plans, and free consultations. We identify the right permitting pathway for your specific property and city.
Animation of Symbihom’s Garage Conversion
What We Build
• Attached or detached garage conversion — studio, 1BR, or 2BR, 300–850 sq. ft.
• Junior ADU (JADU) — attached garage, up to 500 sq. ft.
• Home conversion — convert underutilized interior space into a fully permitted ADU
• Backyard ADU — new detached unit on your existing lot
• State-approved factory-built panel system
• Fully customizable finishes — cabinetry, flooring, fixtures
• ADA-accessible design available
• Sub-metered electricity and water available
Timeline:
Typical build: 4–6 weeks after permits are issued. Designs are customizable across garage conversions, home conversions, and backyard ADUs.
Is Your Property Eligible?
The lot must be zoned residential with an existing single-family home or duplex, and must not be located in a geohazard, landslide, flood zone, or Wildland-Urban Interface area. The property must not have an open Code Enforcement violation.
Not sure if your property qualifies? Fill out the form below. We check zoning and flag any issues before you spend anything.