ADU Construction in Monte Sereno

Why Monte Sereno is a Strong Market for ADU Construction

Monte Sereno homeowners are increasingly building ADUs for extended family, home offices, and rental income. The area’s strong property values and luxury standards make ADU investment a sound decision. Silicon Valley’s tech-driven economy supports strong demand for modern, energy-efficient residences.

Custom Home builds ADUs in Monte Sereno 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 Monte Sereno

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 Monte Sereno typically range from $375K to $650K.

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 Monte Sereno, starting from $200K. Since the structure already exists, you save on foundation, framing, and roofing costs.

Monte Sereno ADU Permitting

Monte Sereno’s planning and building services handle residential permits with a strong emphasis on design review. New construction requires approval from the city’s Architectural Control process, which evaluates building design, setbacks, and landscape plans. Plan review typically takes 4-8 weeks. The city contracts with Santa Clara County for building inspections.

Custom Home manages the entire ADU permitting process in Monte Sereno, preparing plans that meet local requirements for efficient review and approval.

ADU Rental Income Potential in Monte Sereno

Monte Sereno’s rental market supports strong returns for ADU owners. Estimated monthly rental rates:

• Studio/1-bedroom (400-600 sqft): $2,800-$3,300/month
• 1-bedroom (600-800 sqft): $3,200-$4,200/month
• 2-bedroom (800-1,200 sqft): $4,000-$4,500/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.