ADU Construction in Mountain View, CA

Looking to build an ADU (Accessory Dwelling Unit) in Mountain View? Quartz Construction is the Bay Area’s premier ADU contractor, handling everything from ADU design and permits to construction and final inspection. We build detached backyard ADUs, garage conversions, attached ADUs, and Junior ADUs (JADUs) for Mountain View homeowners.

ADU Construction Services in Mountain View, CA

• Detached Backyard ADU — New standalone unit in your backyard (up to 1,200 sq ft)
• Garage Conversion ADU — Convert your existing garage into a livable unit
• Attached ADU — Addition attached to your existing home
• Junior ADU (JADU) — Convert a room within your home (up to 500 sq ft)
• ADU Design & 3D Rendering — Custom ADU floor plans and photorealistic visuals
• ADU Permitting — We manage all permits with the City of Mountain View
• Utility Connections — Water, sewer, electrical, and gas hookups
• ADU Landscaping — Pathway, fencing, and privacy landscaping

How Much Does an ADU Cost in Mountain View?

ADU construction in Mountain View typically costs $160,000–$380,000. A garage conversion ADU runs $80,000–$150,000. A new detached ADU costs $200,000–$350,000. ADU costs depend on size, design, site conditions, and utility connections. Many Mountain View homeowners finance their ADU through home equity loans or California’s ADU Grant Program (up to $40,000 for qualifying owners).

ADU Rental Income in Mountain View

ADUs in Mountain View and the Bay Area generate $2,000–$3,500+/month in rental income. At $2,500/month, an ADU pays for itself in 6–8 years while adding $250,000–$450,000 in property value. ADUs are one of the highest-ROI investments available to Bay Area homeowners.

ADU FAQ — Mountain View, CA

Can I build an ADU on my Mountain View property?
California state law (AB 68) allows ADUs on virtually all single-family lots in Mountain View and throughout the Bay Area. Quartz Construction provides a free ADU feasibility analysis for your specific property.

How long does ADU permitting take in Mountain View?
ADU permits in Bay Area cities typically take 2–4 months for standard designs. Pre-approved ADU plans can reduce this to 1–2 months. We manage the entire permit process.

What setback rules apply to ADUs in Mountain View?
California law requires 4-foot side and rear setbacks for detached ADUs. Front setbacks vary by city. Quartz Construction’s ADU specialists know Mountain View’s specific requirements and design your ADU to comply.

Can I Airbnb my ADU in Mountain View?
Short-term rental regulations vary by city. Many Bay Area cities allow ADU short-term rentals with a permit. Long-term rentals are unrestricted. Quartz Construction can advise on current regulations for your specific city.

Get a Free ADU Estimate in Mountain View

Ready to build an ADU in Mountain View? Call Quartz Construction at (650) 749-7436 or request a free ADU feasibility analysis. We serve Mountain View and all Bay Area cities with licensed ADU construction services. CSLB #1003436 | BBB A+ | 4.9⭐