ADU Construction in Montara

Why Montara is a Strong Market for ADU Construction

Montara 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. Coastal construction requires salt-air-resistant materials, wind-rated designs, and compliance with the Local Coastal Program.

Custom Home builds ADUs in Montara 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 Montara

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 Montara 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 Montara, starting from $175K. Since the structure already exists, you save on foundation, framing, and roofing costs.

Montara ADU Permitting

As an unincorporated community, Montara building permits are issued through San Mateo County’s Planning and Building Department. Projects in the coastal zone require a Coastal Development Permit in addition to standard building permits. Plan review timelines vary but typically take 8-12 weeks for custom residential projects. Custom Home manages the county permitting process on behalf of our clients, coordinating all required reviews and inspections.

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

ADU Rental Income Potential in Montara

Montara’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.