Second story additions in Berkeley

We serve six Bay Area counties — Alameda, Contra Costa, Marin, Napa, San Mateo, and Santa Clara — covering 47 cities from Oakland to San Jose. Our crews are based in Castro Valley, putting us within 45 minutes of every city we serve. We handle permits and know the building codes for each jurisdiction, which matters because requirements and fees vary significantly between cities.

We offer $0-down financing with approved credit, 12-month same-as-cash plans, and extended terms up to 15 years for larger projects. You only pay for completed, inspected work — we never ask for full payment before the job is done. Your project manager will walk you through every option during your estimate appointment. We also accept checks, ACH, and all major credit cards.

Yes. CSLB License #1078806 — verify it anytime at cslb.ca.gov. We carry $2M general liability, full workers’ comp, and are bonded per California law. We hold GAF Master Elite, Owens Corning Preferred, CertainTeed ShingleMaster, and James Hardie Elite Preferred certifications — each requires annual training and quality audits to maintain. We’re happy to provide proof of insurance before any work begins.

Most exterior projects in the Bay Area require a building permit. Fees vary by city — Oakland runs $200–$600, Peninsula cities often more. We handle the entire permit process: application, plan submission, and scheduling inspections. Permit fees appear as a separate line item in your estimate so you’ll see every cost upfront. For homes in WUI fire zones (Berkeley Hills, Oakland Hills, parts of Marin), we ensure full compliance with local fire-rated material requirements.

Second story additions in Berkeley typically run $400 to $575 per square foot. An 800 to 1,200 sq ft addition costs $320,000 to $690,000 fully built. Costs in Berkeley are higher than the broader Bay Area because of AUP application requirements, mandatory seismic upgrades on pre-1978 homes near the Hayward Fault, and WUI material requirements for hillside projects.

Yes. Most second story additions in Berkeley require an Administrative Use Permit (AUP) that goes before the Zoning Adjustments Board. AUPs are reviewable for neighbor appeal, which is why our designs prioritize neighborhood compatibility, height stepping, and respectful massing from the first sketch. Our team prepares the full AUP application package and presents at ZAB hearings as needed.

Plan on 4 to 7 months from application to issued building permit in Berkeley. The Administrative Use Permit takes 60 to 90 days at the Zoning Adjustments Board, Permit Service Center plan check runs 8 to 14 weeks in parallel, and Berkeley Fire Department review adds 2 to 3 weeks for any WUI hillside project. Active construction is typically 18 to 24 weeks once permits issue.

Yes. Any second story addition in the Berkeley Hills WUI zone (most areas above the Hayward Fault) must use Class A roofing, ignition-resistant siding, and ember-resistant attic venting. Berkeley Fire Department reviews every WUI permit for compliance with defensible space and access requirements. Our designs incorporate these standards from day one.

We build second story additions across all of Berkeley, including North Berkeley, Elmwood, Claremont, Berkeley Hills, Westbrae, the Gourmet Ghetto area, Le Conte, and Halcyon. We pay particular attention to historic Maybeck and Morgan homes in the hills and to AUP design review in every district.