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ADU Builders Bay Area

Featured in San Jose Today 5.00 (134 reviews)(669) 201-8445

ADU Builders Bay Area is a San Jose builder focused on accessory dwelling units. Its team handles ADU design, plans, permit applications and construction. Projects include detached and attached units, garage conversions and backyard cottages; a customer also describes an engineered split-level studio on a steep site.

Business Highlights
  • The company says it is licensed and insured.

Service Area

San Jose and Bay Area communities including Santa Clara, Sunnyvale, Milpitas, Cupertino and Palo Alto.

Featured on ProsGrade. ADU Builders Bay Area is one of 7 home builders ProsGrade lists in San Jose, California.

Listing details

6 services listed, including Detached ADUs, Attached ADUs and Garage conversions. Open 7 days a week. Rated 5.0 from 134 reviews.

  • Verified listing details
  • Service information
  • Customer review signals
  • Photo gallery
  • Public contact information
  • Published local profile

How This Business Compares

How ADU Builders Bay Area compares with the other 6 home builders on ProsGrade in San Jose, using public Google ratings and review counts.

  • Ranks in the top quarter of the 7 San Jose home builders on ProsGrade by Google rating and review volume.
  • Rated 5.0 on Google, at or above the 4.9 average of other San Jose home builders on ProsGrade.
  • Has the most Google reviews (134) of the 7 San Jose home builders on ProsGrade.
  • One of 5 San Jose home builders on ProsGrade rated 4.7 or higher from at least 10 reviews.

Services Covered

6 services
  • Detached ADUsSeparate backyard living units
  • Attached ADUsNew living space connected to the main home
  • Garage conversionsExisting garages converted into living units
  • Backyard cottages and in-law suitesSmall residential units for guests or family
  • ADU design and permittingArchitectural plans, engineering calculations and permit application assistance
  • ADU constructionFoundation, utilities, roofing, interiors and finishes as specified in the project agreement

Reviews

What customers say

Customers value regular progress updates and guidance with design and permits. One homeowner credits the team with devising a split-level plan for a challenging hillside site.

Customer Reviews

Diana I

Building an ADU certainly came with its challenges. For one, our backyard was not just a simple slope. Everyone had to hear our backyard was an un-buildable mini cliff. Everyone had to hear that a construction company would tell us that building an ADU would require a retaining wall that would cost us over six figures. With an attitude that defied the odds, ADU Builders Bay Area took it as a challenge. They came up with the first innovative plan of a split level. This would need a specialized deep steel and concrete reinforced pier system. They partnered with us to figure out the complicated engineering involved. With project manager David and Andrew, it became clear. They had to build a custom seamless 3D model that showcased their vision as a hillside integrated structure. They had to completely simulate the entire construction process. They didn't bulldoze when confronted with an unexpected seam of loose rock. They brought in a geotech and made an important adjustments to the pier depth. This was a premium project. But it certainly wasn't just an ADU. It was a one of a kind, solid, treehouse-like, cantilevered studio. Rather than just build on our land, they built with it. They changed a not possible from the vast majority of contractors to a wow with their final result.
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Aaron Baker

While I am building my backyard cottage, I genuinely feel good about ADU Builders Bay Area. I got to hear all the stories of contractors and the lack of consistency and issues with delivery, so I went into the project with some level of hesitation. Consistency is what I appreciated the most with their team. I am a frequent traveler, and so I was away during a chunk of construction. Even during those times, I was kept up to date through the status updates and pictures. This level of transparency surely helped build a lot of trust. In the end, the timeline was shorter than actually predicted, being about 4 months. The quality of the final work was amazing. I was given quotes, and the same quotes were given again, and again halfway through the project. I decided to add a couple of upgrades, and those extra costs went into the upgrades, and I was not surprised in any way. On the fly, I gained a lot of confidence in their building problems solving skills, as they managed some drainage and electrical issues.
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Anne

We built a one-bedroom ADU in our backyard in San Jose. This was so my mom could live closer while still maintaining her independence. ADU Builders Bay Area guided us through everything, from layout ideas to dealing with the city. The design team helped us fit a lot into a small space, and the construction crew treated our neighbors with respect. It took a bit longer than we hoped due to scheduling inspections, but the result is worth it. Mom has moved in and has already made it feel like home.
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Frequently Asked Questions

What happens before ADU construction begins?

The process starts with a consultation and detailed estimate, followed by a contract, finalized design and permit plans.

Can the company help with permit applications?

Its design-build package includes architectural plans, engineering calculations and permit application assistance.

Are in-person meetings available?

The company offers in-house or online consultations.

Can an existing garage become an ADU?

Garage conversion is one of its offered project types.