Garage Conversion in Cupertino
A garage conversion is the fastest and most affordable way to add living space to your Cupertino home, with projects typically ranging from $175K to $300K. Custom Home handles design, permits, and construction with the same 3D visualization process we use for our custom homes.
How much does a garage conversion cost in Cupertino?
Garage conversions in Cupertino typically range from $175K to $300K depending on size, finishes, and plumbing requirements in 2026. Custom Home provides itemized pricing during Phase 1 so you know every cost before construction starts.
Garage Conversion Options in Cupertino
A garage conversion transforms your existing garage into a fully permitted living space. In Cupertino, conversions typically cost $175K-$300K, making them the most affordable way to add a bedroom, home office, rental unit, or guest suite to your property. Since the basic structure already exists, you save significantly compared to building new.
Custom Home handles everything from design through construction, using the same 3D visualization process that powers our custom homes. You see the finished space before any work begins.
What a Cupertino Garage Conversion Includes
Every Custom Home garage conversion includes:
- Insulation and climate control for year-round comfort
- Electrical upgrades including lighting, outlets, and panel capacity
- Drywall, flooring, and interior finishes to your specifications
- Windows and natural light to meet building code requirements
- Plumbing for kitchen and/or bathroom (if included in scope)
- Separate entrance for independent access
Cupertino Permits and Parking Requirements
Cupertino’s Community Development Department handles residential building permits. Plan review for new construction typically takes 4-6 weeks. The city offers counter permits for minor projects and requires design review for homes in the Monta Vista hillside area. Online permit tracking is available through the city’s portal.
Under California state law, most cities cannot require replacement parking when you convert a garage to an ADU. This means you can move forward without building a new parking structure. Custom Home handles all permitting with Cupertino’s building department.
Garage Conversion vs. Detached ADU in Cupertino
Both options add living space to your Cupertino property, but they differ in cost, timeline, and flexibility:
- Cost: Garage conversions ($175K-$300K) cost significantly less than detached ADUs because the structure already exists.
- Timeline: Conversions complete in 4-6 months vs. 8-12 months for detached units.
- Size: Conversions are limited by your existing garage footprint. Detached ADUs can be built up to 1,200 sqft.
- Rental value: Both can generate strong rental income, though larger detached ADUs typically command higher rents.
Custom Home can help you evaluate which option makes the most sense for your property and goals during our Phase 1 design process.
Pricing for Garage Conversion in Cupertino
Garage conversion costs in Cupertino typically range from $175K to $300K depending on garage size, finish level, and plumbing requirements. This is significantly less than building a new structure since the foundation, framing, and roof already exist. Custom Home itemizes every cost during the design phase.
Cupertino Permit Requirements
Cupertino's Community Development Department handles residential building permits. Plan review for new construction typically takes 4-6 weeks. The city offers counter permits for minor projects and requires design review for homes in the Monta Vista hillside area. Online permit tracking is available through the city's portal. Custom Home manages the garage conversion permit process, ensuring plans meet all local building codes.
Garage Conversion in Cupertino: FAQ
What is the cost of a garage conversion in Cupertino?
Garage conversions in Cupertino typically cost $175K-$300K depending on garage condition, finish level, and plumbing scope. This is the most affordable way to add a permitted living space to your property.
How long does a garage conversion take in Cupertino?
Garage conversions in Cupertino typically take 4-6 months from design to completion, making them the fastest path to additional living space. The design phase runs 2-4 weeks, and construction takes 3-5 months.
Can I convert a detached garage in Cupertino?
Yes. Both attached and detached garages can be converted to living space in Cupertino. Detached garage conversions may qualify as ADUs under California state law. Custom Home evaluates your specific garage during Phase 1 to determine the best approach.