Junior ADUs (JADUs) in Los Gatos, CA

GS Design and Build constructs Junior ADUs in San Jose and Menlo Park, converting existing home space into a fully code-compliant living unit.

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  • Adds a rentable living unit without expanding your home's existing footprint
  • Works within your current structure, reducing site disruption and exterior alteration
  • Qualifies for no additional parking requirement under California state law
  • Increases your property's income potential in one of California's highest-demand rental markets
  • Allows a family member to live independently while remaining on the same property
  • Can be paired with a standard ADU on the same single-family lot to maximize unit count
Interior view of a finished Junior ADU conversion inside a single-family home in San Jose, showing an efficiency kitchen, private entrance door, and compact living area. The space reflects a clean residential remodel built to California JADU standards by GS Design and Build.

Expert Junior ADUs (JADUs) in Los Gatos, CA

A Junior ADU, or JADU, turns unused space inside your existing San Jose or Menlo Park home into a separate, livable unit up to 500 square feet. GS Design and Build handles the full scope: site assessment, permit-ready design, city submittal, and construction. JADUs must sit entirely within your home's existing footprint, including an attached garage, and require their own exterior entrance and an efficiency kitchen. In the Bay Area's high-density housing market, a JADU is one of the most practical ways to add rental income or house a family member without expanding your home's footprint. San Jose and Menlo Park both allow one JADU per single-family lot alongside a standard ADU, so qualifying homeowners can maximize the use of a single parcel. Our team knows the local plan-check process and builds to California's current JADU standards. Call GS Design and Build to find out if your San Jose or Menlo Park home qualifies.

What's included

  • Adds a rentable living unit without expanding your home's existing footprint
  • Works within your current structure, reducing site disruption and exterior alteration
  • Qualifies for no additional parking requirement under California state law
  • Increases your property's income potential in one of California's highest-demand rental markets
  • Allows a family member to live independently while remaining on the same property
  • Can be paired with a standard ADU on the same single-family lot to maximize unit count
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Junior ADUs (JADUs) FAQ

Common questions about junior adus (jadus) in Los Gatos, CA.

Yes, San Jose allows one JADU and one standard ADU on the same single-family lot. Both units can be active at the same time on a qualifying property.

Any space within your home's existing footprint qualifies, including an attached garage or interior rooms. The finished unit must be 500 square feet or smaller and have its own exterior entrance.

No, a JADU may share a bathroom with the main house. If it does share a bathroom, California law requires the owner to live on the property.

No additional parking is required for a JADU in Menlo Park. California state law exempts JADUs from added parking requirements.

A JADU must have its own exterior entrance and an efficiency kitchen at minimum. It must be contained entirely within the existing structure and stay at or under 500 square feet.

Yes, JADUs in Menlo Park can be rented to non-family tenants. Short-term rentals are not permitted, so the unit must be leased for longer-term occupancy.

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What Santa Clara County homeowners say.

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From our very first appointment with Gershon, we felt confident we were in excellent hands. He listened carefully to what we wanted, offered thoughtful design suggestions, and walked us through the process and timeline in a clear, transparent way. Every step—from initial design and planning to the finishing touches—was handled smoothly, with consistent updates so we always knew what was happening next. The crew that worked on our home was hard working, professional, and very knowledgeable. They arrived on time, respected our home, and kept the work area as tidy as possible, which we really appreciated. The finished kitchen looks fantastic and functions even better than we hoped and the quality of the workmanship really stands out. Friends and family have already commented on how beautiful and well thought-out the space is. We would not hesitate to hire GS Design & Build again for future projects. If you’re looking for a top-tier contractor for your home remodeling, GS Design & Build are an outstanding choice.

Charles Decker, DC, ACN Google review · June 2026

GS Design and build did an amazing job uplifting my garage. Gheri was the most responsive of the contractors I got quotes from and he was very quick to respond with a reasonable estimate. He was always reachable and ensured the team was very punctual. His crew did a great job completing the job and handling surprises. I didn’t have to contact Gheri for anything during the job. The final work quality was great and my garage looks great! I will highly recommend GS Design and Build for your home improvements Update: i did a bathroom remodel with them 6 months after the garage upgrade and it was amazing! The team has remained consistent with their quality and workmanship!

viswanathan vaidyanathan Google review · June 2026

We used GS Design and Build for a room addition in Redwood City and couldn’t be happier. Geri helped us figure out the best layout for our new sunroom and made sure the style blended with the rest of our house. Her crew worked clean and fast, and everything passed inspection the first time. The project wrapped up on schedule and within our budget. The space gets amazing light and has quickly become our favorite part of the house. If you’re in the market for a room addition contractor who truly listens and executes, don’t look any further.

Ronda Richardson Google review · September 2025

Just got my home addition done! GS design helped us build a new bathroom and a new master bed in new construction. Everything was fully licensed and Geri managed everything at his end. I found Geri on Nextdoor and was nervous before signing him up but to my surprise, I couldn’t have asked for more! He has a lovely team of people who specialize in what they do. Geri cared for me and made sure I am satisfied at each step. He gave me a good run down of what he plans to do in the coming week which was very satisfying. Geri’s rates were also very competitive and he was reasonable when the work order changed. What I liked about Geri a lot is also that his interior designing skills are also very strong so he guided us when the size of the window was off or in making lovely choices of the flooring. You can trust Geri blindly and go with him. You will not regret it. Thanks Geri, for all the great work.

Vedant Dhandhania Google review · April 2022

We live in Redwood City and reached out to GS Design and Build for a second-story room addition. Geri coordinated with our structural engineer and managed the project with confidence. We were impressed with how smoothly everything went. Her communication throughout the process was excellent. The new space has completely transformed our home and given us the extra flexibility we needed. Top-notch room addition contractor and a pleasure to work with.

Deanna Callison Google review · September 2025

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ADU Specialists
Full Remodel Services
Multi-City Service Coverage
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