ADU Construction in Mountain View
Mountain View is a strong market for ADU construction, with options ranging from $175K for a garage conversion to $550K+ for a large detached unit. Custom Home builds detached, attached, and garage conversion ADUs in Mountain View with full 3D visualization and itemized pricing through our two-phase process.
How much does an ADU cost in Mountain View?
Mountain View ADU costs range from $175K-$275K for a garage conversion to $300K-$550K for a detached unit in 2026. Custom Home's two-phase process provides 3D visualization and exact pricing before construction begins.
Why Mountain View is a Strong Market for ADU Construction
Mountain View is a strong market for ADU construction, with property values and rental demand that support the investment. Homeowners use ADUs for rental income, multigenerational living, and home offices. Silicon Valley’s tech-driven economy supports strong demand for modern, energy-efficient residences.
Custom Home builds ADUs in Mountain View with the same two-phase design-build process we use for custom homes. You see the complete design in 3D and receive itemized pricing before any construction begins.
Types of ADUs We Build in Mountain View
Detached ADUs
A standalone structure in your backyard, typically 400-1,200 sqft. Detached ADUs offer the most privacy and design flexibility. They work well for rental units, home offices, or multigenerational living. Construction costs in Mountain View typically range from $300K to $550K.
Attached ADUs
Built as an addition to your existing home, sharing at least one wall. Attached ADUs are typically more cost-effective than detached units since they share structural elements with the main house. They are a good fit for family members who want proximity while maintaining separate living spaces.
Garage Conversions
Converting an existing garage into a living space is the most affordable ADU option in Mountain View, starting from $175K. Since the structure already exists, you save on foundation, framing, and roofing costs.
Mountain View ADU Permitting
Mountain View’s Community Development Department processes residential building permits with typical plan review times of 4-6 weeks. New construction and major additions are subject to the city’s Residential Design Guidelines. The city offers electronic plan submission and online permit tracking through its development portal.
Custom Home manages the entire ADU permitting process in Mountain View, preparing plans that meet local requirements for efficient review and approval.
ADU Rental Income Potential in Mountain View
Mountain View’s rental market supports strong returns for ADU owners. Estimated monthly rental rates:
- Studio/1-bedroom (400-600 sqft): $2,400-$2,900/month
- 1-bedroom (600-800 sqft): $2,800-$3,500/month
- 2-bedroom (800-1,200 sqft): $3,300-$3,800/month
At these rates, many ADU investments pay for themselves within 7-12 years through rental income alone, not counting the property value increase that a permitted ADU provides.
Pricing for ADU Construction in Mountain View
Mountain View ADU construction costs range from $175K for a basic garage conversion to $550K+ for a large detached unit with premium finishes. Per-square-foot costs typically run $450-$650/sqft. Garage conversions are the most cost-effective option since the structure already exists. Custom Home provides itemized pricing during Phase 1 so you know every cost before committing.
Mountain View Permit Requirements
Mountain View's Community Development Department processes residential building permits with typical plan review times of 4-6 weeks. New construction and major additions are subject to the city's Residential Design Guidelines. The city offers electronic plan submission and online permit tracking through its development portal. Custom Home handles the entire ADU permitting process, preparing plans that meet local requirements for efficient approval.
ADU Construction in Mountain View: FAQ
What does ADU construction cost in Mountain View?
ADU costs in Mountain View range from $175K for a garage conversion to $550K+ for a large detached unit. The biggest cost factors are ADU type, size, finishes, and utility connections. Custom Home provides itemized pricing during Phase 1 so you know every cost upfront.
How long does it take to build an ADU in Mountain View?
ADU construction in Mountain View typically takes 6-12 months from design to move-in. Garage conversions are fastest at 4-6 months, while detached units take 8-12 months including permits. Custom Home's design phase front-loads decisions to keep construction on schedule.
Can I rent out my ADU in Mountain View?
Yes. California law allows ADU rentals, and Mountain View does not require owner-occupancy. Many homeowners earn $2,400-$3,800/month in rental income from their ADU, making it a strong investment.