ADU Construction in Dublin
Dublin 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 Dublin with full 3D visualization and itemized pricing through our two-phase process.
How much does an ADU cost in Dublin?
Dublin 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 Dublin is a Strong Market for ADU Construction
Dublin 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. Excellent schools and family-oriented communities drive demand for well-designed homes.
Custom Home builds ADUs in Dublin 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 Dublin
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 Dublin 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 Dublin, starting from $150K. Since the structure already exists, you save on foundation, framing, and roofing costs.
Dublin ADU Permitting
Dublin’s Building and Safety Division processes residential permits through their online portal. Standard plan review takes 3-6 weeks for most residential projects. The city’s Building and Safety Division is experienced with new construction, given Dublin’s significant growth over the past two decades.
Custom Home manages the entire ADU permitting process in Dublin, preparing plans that meet local requirements for efficient review and approval.
ADU Rental Income Potential in Dublin
Dublin’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 Dublin
Dublin 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 $375-$550/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.
Dublin Permit Requirements
Dublin's Building and Safety Division processes residential permits through their online portal. Standard plan review takes 3-6 weeks for most residential projects. The city's Building and Safety Division is experienced with new construction, given Dublin's significant growth over the past two decades. Custom Home handles the entire ADU permitting process, preparing plans that meet local requirements for efficient approval.
ADU Construction in Dublin: FAQ
What does ADU construction cost in Dublin?
ADU costs in Dublin 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 Dublin?
ADU construction in Dublin 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 Dublin offer pre-approved ADU plans?
Many Bay Area cities, including some in Alameda County, offer pre-approved ADU plans that can reduce permitting time. Custom Home can advise on whether pre-approved plans are available for your Dublin property or whether a custom design is the better option.