Maison Remodeling Group designs and builds accessory dwelling units across San Jose, Santa Clara, and the Bay Area. From permits to completion — 40+ years of experience.
Custom floor plans optimized for your lot, maximizing space and functionality while meeting all code requirements.
We handle all permit applications, city requirements, and inspections so you don't have to navigate the bureaucracy.
Solid structural work that meets seismic requirements and provides a durable foundation for your ADU.
Complete MEP systems including connections to existing utilities or independent systems as needed.
Premium finishes including flooring, cabinetry, fixtures, and appliances for a move-in ready space.
Expert construction of both standalone units and additions attached to your existing home.
Decades of expertise in residential construction and ADU projects.
Deep knowledge of state and local ADU regulations and requirements.
One team handles design, permits, and construction - no coordination headaches.
Detailed quotes with no hidden costs or surprise fees.
Premium materials and expert construction that lasts.
A streamlined approach to bring your ADU from concept to completion.
Assess your property and discuss goals
Create custom plans and 3D renderings
Handle all city approvals and permits
Expert building with regular updates
Final inspection and key handover
See some of our beautiful ADU projects in the Bay Area.
Everything you need to know about ADU in San Jose
In San Jose, ADU projects typically range from about $200,000 to $500,000 depending on size, site conditions, and utility upgrades. Detached units with full kitchens and premium finishes are usually at the higher end. Grading, sewer connection work, and PG and E service coordination can materially affect final cost in Bay Area neighborhoods.
Most ADU projects in San Jose take around 9 to 14 months from planning through final inspection. Design and permit review can take several months before construction starts, especially for custom layouts. Maison Remodeling Group maps timelines around city review stages and long-lead materials to reduce avoidable delays.
Yes, ADUs in San Jose require permits, including building and trade permits for electrical, plumbing, and mechanical systems. Projects also need to satisfy local zoning, setback, and utility requirements before approval. Proper permitting is essential for legal occupancy and future financing or resale.
Many Bay Area homeowners prefer one-bedroom detached ADUs between 500 and 800 square feet with open living areas and strong natural light. In San Jose, two-bedroom plans are also popular for multigenerational living and long-term rental demand. Space-efficient kitchens, in-unit laundry, and private outdoor access are frequent priorities.
Start with licensed builders who can show completed local ADU projects and explain permit strategy in clear detail. Compare bids for scope clarity, utility assumptions, and project management process, not just base price. Maison Remodeling Group recommends confirming who handles city responses, inspections, and final punch-list closeout before you commit.
A well-designed ADU can substantially increase property value in San Jose by adding legal livable square footage and income potential. Value impact depends on unit size, quality, and neighborhood rental demand, but ADUs are often viewed as high-utility assets in the Bay Area. They can also create flexibility for family housing or future downsizing plans.
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Get started with a free consultation and estimate for your ADU project.
Everything you need to know about building an Accessory Dwelling Unit (ADU), from permits and costs to design considerations and financing options.
Read More →ADU construction in California costs $150,000-$400,000+ in 2026. Learn about costs by type, new state laws, financing, and San Jose-specific requirements.
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