Home Addition Contractor in Mountain View

We serve Northern California across three regions: the San Francisco Bay Area, Greater Sacramento, and the Central Valley. Our published guides cover 14 counties and 88 cities. Our Castro Valley and Sacramento offices support local estimating, permit coordination, and project planning across these regions.

Financing may be available for eligible projects with approved credit. Available terms depend on lender approval, project scope, and current programs. Your project manager can review the options that apply before work begins. We also accept checks, ACH, and major credit cards.

Yes. Hamilton Exteriors holds CSLB License #1078806, active general liability coverage, and the required contractor bond. We also hold GAF Master Elite and James Hardie Elite Preferred credentials. We can provide current proof of coverage before work begins.

Permit requirements depend on the project scope and local jurisdiction. Hamilton Exteriors coordinates required applications, plan documents, corrections, and inspections. Permit fees and allowances appear in the proposal before construction begins.

Architect-led process. I oversee every project from initial inspection through final walkthrough. My architecture background means we think about how materials, design, and craftsmanship come together — not just whether the framing is square. Transparent pricing. Every estimate is itemized line by line: materials, labor, permits, cleanup. You see exactly where your money goes before we start. Factory-certified installers. Every crew member is manufacturer-certified and vetted — licensed, bonded,

A Mountain View addition needs pricing for the actual design, not just a floor-area average. Foundation and framing work, roof changes, kitchen or bathroom fixtures, and finish selections affect the scope. Ask the estimate to identify design, engineering, permits, construction, allowances, and exclusions so you can compare equivalent proposals.

Yes. All home additions in Mountain View require building permits from the Mountain View Community Development Department. This includes structural, electrical, plumbing, and mechanical permits. Most additions also require Title 24 energy compliance documentation. Hamilton Exteriors handles the entire permitting process — we prepare drawings, submit plans, schedule inspections, and coordinate with the city. Permit timelines run 4 to 8 weeks for most residential additions.

Most Mountain View home additions complete in 12 to 20 weeks from permit approval. Second-story additions take 16 to 24 weeks due to the structural complexity of roof removal, floor framing, and re-roofing. Room extensions on an existing foundation complete faster at 10 to 14 weeks. Your project manager provides a detailed schedule at contract signing and weekly progress updates with photos throughout construction.

Have a structural engineer assess your Mountain View home's foundation and framing for the proposed second story. Review height and layout requirements with the city before finalizing plans. Any strengthening, stair changes, and roof work belong in the project estimate. Feasibility and cost cannot be confirmed from the existing home's size alone.