ADU Construction in Pacifica
Pacifica is a strong market for ADU construction, with options ranging from $150K for a garage conversion to $475K+ for a large detached unit. Custom Home builds detached, attached, and garage conversion ADUs in Pacifica with full 3D visualization and itemized pricing through our two-phase process.
How much does an ADU cost in Pacifica?
Pacifica ADU costs range from $150K-$250K for a garage conversion to $250K-$475K for a detached unit in 2026. Custom Home's two-phase process provides 3D visualization and exact pricing before construction begins.
Why Pacifica is a Strong Market for ADU Construction
Pacifica offers practical conditions for ADU construction, with competitive build costs and solid rental demand. Many homeowners recoup their ADU investment through rental income within several years. Coastal construction requires salt-air-resistant materials, wind-rated designs, and compliance with the Local Coastal Program.
Custom Home builds ADUs in Pacifica 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 Pacifica
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 Pacifica typically range from $250K to $475K.
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 Pacifica, starting from $150K. Since the structure already exists, you save on foundation, framing, and roofing costs.
Pacifica ADU Permitting
Pacifica’s Planning and Building Division processes residential building permits with typical plan review taking 6-10 weeks for custom homes. Hillside projects may require a geotechnical report and grading plan review. Properties in certain zones are subject to the city’s Local Coastal Program requirements. Custom Home prepares complete permit-ready plans that address all of Pacifica’s building and planning requirements.
Custom Home manages the entire ADU permitting process in Pacifica, preparing plans that meet local requirements for efficient review and approval.
ADU Rental Income Potential in Pacifica
Pacifica’s rental market supports strong returns for ADU owners. Estimated monthly rental rates:
- Studio/1-bedroom (400-600 sqft): $2,000-$2,500/month
- 1-bedroom (600-800 sqft): $2,400-$2,900/month
- 2-bedroom (800-1,200 sqft): $2,700-$3,200/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 Pacifica
Pacifica ADU construction costs range from $150K for a basic garage conversion to $475K+ for a large detached unit with premium finishes. Per-square-foot costs typically run $400-$575/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.
Pacifica Permit Requirements
Pacifica's Planning and Building Division processes residential building permits with typical plan review taking 6-10 weeks for custom homes. Hillside projects may require a geotechnical report and grading plan review. Properties in certain zones are subject to the city's Local Coastal Program requirements. Custom Home prepares complete permit-ready plans that address all of Pacifica's building and planning requirements. Custom Home handles the entire ADU permitting process, preparing plans that meet local requirements for efficient approval.
ADU Construction in Pacifica: FAQ
What does ADU construction cost in Pacifica?
ADU costs in Pacifica range from $150K for a garage conversion to $475K+ 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 Pacifica?
ADU construction in Pacifica 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.
Does Pacifica offer pre-approved ADU plans?
Many Bay Area cities, including some in San Mateo County, offer pre-approved ADU plans that can reduce permitting time. Custom Home can advise on whether pre-approved plans are available for your Pacifica property or whether a custom design is the better option.