ADU & Remodeling Contractors in Cupertino, CA
San Jose ADU & Remodeling has been serving Cupertino homeowners for over 15 years, delivering expert ADU construction, room additions, kitchen remodels, bathroom renovations, and more. As a licensed and fully insured California contractor, we handle every aspect of your project — from architectural plans and city permits to final walkthrough — so you don't have to coordinate multiple vendors.
Cupertino's neighborhoods, from Monta Vista to Garden Gate, present a wide variety of property types and lot configurations. Our local team understands Cupertino's building codes, Cupertino Planning Division requirements, and typical HOA constraints, meaning fewer delays and smoother permitting for your project.
Our Services in Cupertino
We offer the full range of residential construction and remodeling services to Cupertino residents:
ADU Building
Detached & attached units
Room Additions
Expand your living space
Kitchen Remodeling
Full renovations & upgrades
Bathroom Remodeling
Luxury & functional upgrades
Home Remodeling
Full interior transformations
Deck & Patio
Outdoor living spaces
Why Cupertino Homeowners Choose Us
Local Permit Knowledge
We know Cupertino's planning and building departments inside out — faster approvals, fewer revision cycles.
Single Point of Contact
One project manager coordinates every trade from demo to final inspection, keeping your project on schedule.
Transparent Pricing
Detailed line-item quotes before we break ground. No hidden fees, no surprise change orders.
Workmanship Warranty
Every project comes backed by our written warranty. We stand behind our work long after completion.
Building an ADU in Cupertino, CA
Cupertino is one of the most ADU-friendly cities in Santa Clara County, driven in large part by California's statewide ADU laws (AB 68, SB 9) that override local restrictions. Whether you're looking to add a detached backyard ADU, convert an existing garage, or build a junior ADU (JADU) within your home, we can guide you through the entire process.
Cupertino ADU Highlights
- Detached ADUs up to 1,200 sq ft permitted on most single-family lots
- Garage conversions qualify as ADUs with streamlined approvals
- Junior ADUs (up to 500 sq ft) inside existing home footprint
- ADU permit fees in Cupertino are capped under state law — saving you money
- Owner does not need to occupy the property (as of 2020 state law)
- Rental income potential: Cupertino ADUs typically rent for $2,500–$4,500/month
Learn more: ADU Building Guide & Costs | ADU Building Permits | How Long Does ADU Construction Take?
📍 Serving All Cupertino Neighborhoods
We work throughout all of Cupertino, including Monta Vista, Garden Gate, Rancho Rinconada, Fairgrove, Seven Springs, Portal, Homestead, and the areas adjacent to De Anza College and Apple Park. Our crews are familiar with the neighborhood streets, utility infrastructure, and typical construction challenges in each area.
Cupertino is bordered by Sunnyvale, Santa Clara, San Jose, Saratoga, and Los Altos — all of which we also serve. If your project is near the city boundary, just ask — we serve the full South Bay.
Room Additions in Cupertino
Adding square footage to your Cupertino home is one of the highest-return investments you can make in a market where homes routinely sell above $2 million. Our room addition and home addition construction services include:
- Master suite additions and second-story expansions
- Sunrooms, family rooms, and flex space additions
- Garage conversions to living space
- Bump-out additions for kitchens and bathrooms
See our cost guide: Room Addition Cost Per Square Foot in San Jose
Free In-Home Estimate for Cupertino Residents
Call us at (650) 900-8598 or submit a contact form and one of our project consultants will visit your Cupertino property, assess the scope, and deliver a detailed written estimate — completely free and with no obligation to proceed.