Additions & ADUs in Tiburon.
Room additions, second-story pops, ADU and JADU builds. We handle the survey, design coordination, permits, and construction.
Why GB Contractors for additions & adus in Tiburon.
GB Contractors (legally Golden Bay Contractor LLC, founded by Manuel Escobar in 2004) is a family-owned, CSLB-licensed general contractor based in Novato. We've been doing additions & adus projects across Marin County for two decades. 35-40 minutes from Novato. Site visits scheduled around bridge traffic.
→ Waterfront and view-corridor work is our wheelhouse — multiple Tiburon estates in our portfolio.
→ We understand the BCDC interface and budget for it from day one.
→ Pier, dock, and seawall work coordinated with marine engineers when needed.
What's in scope.
Typical line items on a additions & adus we'd run in Tiburon. Every bid is line-item — no surprises.
- → Ground-floor additions and bump-outs
- → Second-story additions
- → Detached and attached ADUs
- → Junior ADU (JADU) conversions
- → Foundation work and structural integration
- → MEP rough-in and code compliance
- → Title 24 and energy compliance
- → Permits, including state ADU statute
Working in Tiburon.
Tiburon Planning runs aggressive design review for any project visible from the bay or from neighboring parcels. Waterfront work triggers BCDC and Coastal review on top of city permits.
We've worked across Tiburon's neighborhoods — Belvedere Island, Paradise Cay, Old Tiburon waterfront, Lyford Cove, Hawthorne. Local knowledge of the building department, the design-review patterns, and the building stock isn't a marketing claim for us; it's two decades of repeat work.
Common questions about additions & adus in Tiburon.
Does GB Contractors do additions & adus in Tiburon?
Yes. Additions & ADUs is one of our core services and Tiburon is squarely in our active service area. 35-40 minutes from Novato. Site visits scheduled around bridge traffic.
What does a additions & adus cost in Tiburon?
Mid-range projects in our portfolio start around $150K. High-end builds with structural changes, premium materials, or custom cabinetry typically run $800K+. Tiburon permitting and design-review can add to both timeline and cost — we factor that into bids up front.
How long does a additions & adus take in Tiburon?
5 months to 12 months once construction starts, depending on scope and design-review timing. Tiburon Planning runs aggressive design review for any project visible from the bay or from neighboring parcels. Waterfront work triggers BCDC and Coastal review on top of city permits.
Are you licensed to work in Tiburon?
Yes. GB Contractors (Golden Bay Contractor LLC) holds CSLB License #992507 (Class B General Building), valid statewide in California, and we're fully insured. We pull all required permits and handle inspections directly with the Tiburon building department.
Other services in Tiburon
