ADU Builder in Sunnyvale, CA —
Designed, Permitted, Built.
Family-owned. In-house designers. Licensed Bay Area contractor — Sunnyvale ADU projects designed, permitted, and built by one team from start to finish.
Years in Bay Area
Projects Completed
Google Rating
Licensed Contractor
Why Sunnyvale Homeowners Choose Mayers CNR for Their ADU
Sunnyvale is one of the strongest ADU markets in the Bay Area. Rental demand is consistently high, lot sizes are workable, and the City of Sunnyvale Community Development Department runs a well-organized ADU permit process compared to neighboring cities. Many Sunnyvale homeowners are adding detached ADUs to their backyards, converting attached garages, or building JADUs within the existing footprint. We have built all three types throughout Sunnyvale — Murphy Avenue, Lakewood, Ponderosa, and beyond.
Mayers CNR is fully licensed (CA #1063024), family-owned, and has completed hundreds of projects across the Bay Area since 2012. Our in-house design and planning team handles your ADU from feasibility assessment through final certificate of occupancy. No managing multiple contractors or designers — one team, one point of contact, start to finish.
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In-house design team — ADU floor plans, layout, and interior design included
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Material sourcing assistance — we help you select every finish
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Full permit handling through the City of Sunnyvale Community Development Department
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Detached ADU, attached ADU, garage conversion, and JADU experience
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Named project manager assigned from day one
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Licensed & insured — CA General Contractor #1063024
ADU Projects. Real Sunnyvale Homes.
Your Sunnyvale ADU, Step by Step
Free Feasibility Visit
We visit your Sunnyvale property, assess your lot, existing structure, and setbacks, and tell you what’s possible — no cost or commitment required.
Design & Permit
Our in-house design team creates your ADU plans and manages all City of Sunnyvale Community Development Department permits and approvals.
Foundation & Build
We build your ADU with daily updates at every construction phase. Our crew handles every trade — no subcontractor coordination for you.
Certificate of Occupancy
Final inspections with the City of Sunnyvale, complete walkthrough, and certificate of occupancy — your ADU is ready to occupy or rent.
Real ADU Reviews
We had a great experience with Mayer’s Construction on our JADU project. The team worked incredibly fast and respected our time, minimizing how much we needed to be involved in small details. They captured our vision and we would use them again without hesitation.
Thank you Mike and Nathan for working with us on getting our home remodeled and completed. We chose Mayer’s Construction and we’re glad we did. Natalee was our designer, Mike was our project manager. Daily updates throughout. Home looks beautiful and modern exactly like we wanted.
The team exceeded my expectations with their quality of work and attention to detail. Every aspect of the project was handled professionally and the result speaks for itself. I have referred them to three neighbors already.
Sunnyvale ADU Projects Across Every Neighborhood
We’ve built ADUs throughout Sunnyvale — detached backyard units in Ponderosa and Lakewood, garage-to-ADU conversions in Murphy and Borregas, and JADUs within existing home footprints across Raynor Park and Braly. We know the City of Sunnyvale Community Development Department ADU permit process, the local setback requirements, and how to maximize what your lot allows.
Verified on Every Platform
Mayer’s Construction & Remodeling • CA License #1063024 • Family-owned since 2012 • Serving Sunnyvale & all of Santa Clara County
Sunnyvale ADU FAQ
An ADU in Sunnyvale typically takes 6 to 12 months from permit approval, depending on type and complexity. Detached ADUs take longer than garage conversions or JADUs. The City of Sunnyvale Community Development Department has a relatively efficient ADU permit process compared to neighboring cities — Mayers CNR factors this into your full project timeline from the start.
Sunnyvale allows detached ADUs in the backyard, attached ADUs added to the existing home, garage conversions, and JADUs (Junior ADUs created within the existing footprint). Which type makes the most sense for your property depends on your lot size, setbacks, existing structure, and goals. We assess this during a free feasibility visit.
ADU costs in Sunnyvale vary by type, size, and finish level. A garage conversion is a different scope than a detached ADU with its own foundation and utilities. Mayers CNR provides a detailed estimate after our free feasibility visit. No commitment required. Call (888) 394-4041 to schedule yours.
Yes. Mayers CNR handles the full ADU permit process with the City of Sunnyvale Community Development Department, from initial application through final certificate of occupancy. You never have to deal with the permit office. Our team knows Sunnyvale’s ADU requirements and manages inspections at every phase.
Yes. Our in-house design team creates your ADU floor plans, handles the interior layout, and helps with material and fixture selection. Design and build under one roof means a consistent vision, no third-party coordination delays, and a smoother permit process with the City of Sunnyvale.
Mayers CNR serves all Sunnyvale neighborhoods including Murphy, Lakewood, Ponderosa, Borregas, Mathilda, Raynor Park, and Braly. We also serve Los Altos, Palo Alto, Cupertino, Mountain View, Santa Clara, and the full Bay Area. CA General Contractor License #1063024.
Ready to Add an ADU to Your Sunnyvale Property?
Get a free feasibility visit from the Bay Area contractor Sunnyvale homeowners trust for ADU projects. We’ll assess your lot, explain your options, and give you a full scope — no commitment required.