SERVICE SPEC
ADU Construction
When you need professional ADU Construction in Fontana, CA, Robert & Sons Fontana Builders delivers licensed, insured service backed by years of local experience. Our certified technicians use industry-leading equipment and proven methods to ensure your home or business receives thorough, reliable results every time.
Whether you're dealing with routine maintenance, an urgent repair, or a full system upgrade, we provide transparent pricing, detailed explanations, and workmanship you can trust. We proudly serve Fontana, CA and all surrounding neighborhoods with same-day availability when possible.
California's ADU (Accessory Dwelling Unit) laws have made it easier than ever for Fontana homeowners to add a secondary living unit to their property. Whether you envision a detached backyard cottage, a garage conversion, or an attached junior ADU, Robert & Sons Fontana Builders handles the entire process—from site evaluation and design through permit approval and construction completion.
ADU projects in Fontana must comply with the City's ADU ordinance as well as California state law, and navigating those requirements can be complex. Our team stays current on local setback rules, maximum square footage allowances, owner-occupancy requirements, and utility connection standards so your project moves through plan check without costly delays or redesigns. We prepare complete plan sets, coordinate with city staff, and manage all required inspections.
Construction quality matters especially for ADUs, which often serve as long-term rental units or permanent family housing. We frame to current California building code, install proper insulation for energy compliance (Title 24), and finish interiors to the same standard we apply to primary residences. The result is a durable, comfortable, code-compliant unit that generates real returns on your investment.
- Licensed and fully insured technicians
- Free estimates and upfront pricing
- Same-day and emergency service available
- Commercial and residential expertise
- Satisfaction guaranteed on every job
- Locally owned — we know your area