Custom Homes Contractor in Union City

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.

Custom home construction in Union City typically costs $350-$600 per square foot depending on finishes, complexity, and lot conditions. With land values at $1,050,000 in Union City, a custom build can be more cost-effective than buying. We provide detailed estimates during your free consultation.

Most custom homes in Union City take 12-18 months from design to completion. The Alameda County permitting process adds 2-4 months. We manage every phase so there are no gaps between design, permits, and construction.

Yes. We handle all custom home permitting in Union City and Alameda County — architectural plans, structural engineering, soils reports, Title 24 energy compliance, and city submissions. We navigate Union City planning departments daily.

Absolutely. Modern farmhouse is one of our most requested styles in Union City. We design and build everything from contemporary modern to craftsman and Mediterranean. Many homeowners in Union Landing are choosing modern designs that complement the neighborhood character.

Yes. Many lots in Union City and Alameda County are on slopes. We have extensive experience with hillside construction, including retaining walls, custom foundations, and grading. Our engineers evaluate every lot for feasibility.

Custom home construction in Union City typically costs $350-$600 per square foot depending on finishes, complexity, and site conditions. A 2,500 sq ft home ranges from $875,000 to $1.5M. Hamilton Exteriors provides transparent cost breakdowns during the design phase.

Custom homes in Union City require building permits, grading permits, and must comply with local zoning for setbacks, height, lot coverage, and FAR. Hamilton Exteriors handles all entitlements and works with the city planning department throughout the approval process.

Key factors include zoning designation, slope, soil conditions, utility access, and easements. Union City lots vary significantly. Hamilton Exteriors offers pre-purchase lot evaluation to help you assess build feasibility, estimated site development costs, and potential challenges before you commit.

Our architect-led process starts with a discovery meeting to understand your lifestyle and goals. We develop schematic designs, refine through design development, then produce construction documents. As a licensed GC (CSLB #1078806), we provide integrated design-build delivery from concept through completion.

Custom home builds typically use construction-to-permanent loans that convert to a standard mortgage upon completion. You can also use lot loans plus separate construction financing. Hamilton Exteriors works with Bay Area lenders experienced in custom home lending.