ADU Construction Sunnyvale Free Consultation, 30+ Years
Detached backyard units, garage conversions and basement conversions. Preferred Builders designs, permits and builds accessory dwelling units, from design to construction for homes in Sunnyvale. We handle ADU construction in Sunnyvale from design to final inspection.
LICENSE #1123883 · OVER 30 YEARS IN CONSTRUCTION & REMODELING
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Before the first plan
An ADU planned around your property and your goals.
ADUs are versatile secondary housing units that can serve as guest houses, rental units or additional living space. Our team provides ADU services from design to construction, with customized solutions that meet your needs and complement your home. That is how we approach ADU construction in Sunnyvale.
THE PURPOSE
Start with the why.
Rental income, family housing, a guest house or a home office. The goal shapes the design.
THE TYPE
Choose the right ADU.
Compare detached, attached, garage conversion and basement options for your lot.
THE PAPERWORK
Permits handled.
We prepare the plans, work through the City's ADU requirements and secure the permits.
What we take care of
ADU options for your property.
The right ADU depends on your lot, your existing home and how you plan to use the space, planned for ADU construction in Sunnyvale.
Detached
Detached ADUs
New construction units built in the back or side yard of a single-family home, also called backyard cottages or granny flats.
Conversion
Garage conversion ADUs
Convert an existing garage into a stylish and practical living unit.
Conversion
Basement conversion ADUs
Turn a basement into an in-law unit or secondary suite with its own living space.
Attached
Attached ADUs and in-law suites
An in-law suite attached to the existing home, with its own entrance.
Compact
Junior ADUs (JADU)
A smaller unit created within the existing home for family members or guests.
Planning
Design and permits
Plans, 3D models and permit submittals prepared by our team.
ADU Construction in Sunnyvale
ADU Construction in Sunnyvale, planned for your home.
Sunnyvale offers a streamlined path for many ADUs. Conversion ADUs, JADUs and some new ADUs need only a Building Permit. A new ADU over 800 square feet on a single-family lot first needs a Miscellaneous Plan Permit from the Planning Division. The city's Plans Gallery also lists pre-approved ADU plans. We help you choose the right path and secure the necessary permits.
ADU Construction in Sunnyvale: our Milpitas office and Sunnyvale, about 8 miles apart in a straight line.
Residential building permits in Sunnyvale are handled by Community Development Department, Building Safety (One-Stop Permit Center), 456 W. Olive Ave., Sunnyvale, CA 94086. Phone: 408-730-7444.
The permitting agency makes the final call on what your scope needs. We confirm the requirements for your project, secure the permits before construction starts and coordinate each inspection through to the final sign-off.
What we coordinate for you
Lot review and ADU type selection
Design plans and permit drawings
Permit submittal with the City
Inspections scheduled during construction
Final inspection before move-in
How we work
From the first visit to the final inspection.
Four clear stages for ADU construction in Sunnyvale, so you always know what happens next.
01 / WE MEET YOU
We listen.
Call us or send the form to schedule a free, no-obligation consultation. We review your budget and brainstorm ideas.
02 / WE DESIGN IT
We plan.
Our in-house designers create plans and 3D models for your approval.
03 / WE PERMIT IT
We prepare.
Once you approve the design, we secure the necessary permits and confirm the schedule with you.
04 / WE BUILD IT
We create.
Construction begins once the permit is issued. We pass the final inspection, and your project is complete.
Our work
Recent projects by our team.
Real homes built and remodeled by Preferred Builders in San Jose, Walnut Creek and San Carlos.
San Jose, CA
Addition and full-house remodel
A home addition plus a full remodel, including the kitchen, bathrooms, painting and flooring.
Don’t see your question? Call (669) 588-3929 and talk to our team.
ADU basics
What is an ADU?
An ADU, or accessory dwelling unit, is a secondary housing unit on a single-family residential lot. It can provide rental income or serve as a guest house or home office.
Which type of ADU fits my property?
It depends on your lot size, your existing structures and your goals. We review your property and compare detached, attached, garage and basement options.
Planning your ADU
Do ADUs need permits?
Yes. ADUs need building permits and must meet the City's ADU standards. We prepare the plans and handle the submittals.
Do you offer design services?
Yes. Our in-house designers create the plan, and we use 3D modeling so you can see the ADU before construction begins.
ADU Construction Sunnyvale FAQ
Who issues the permit for ADU construction in Sunnyvale?
Community Development Department, Building Safety (One-Stop Permit Center), 456 W. Olive Ave., Sunnyvale, CA 94086. We confirm the requirements for your scope and secure the permit for your ADU construction in Sunnyvale.
Do you serve all of Sunnyvale?
Yes. We handle ADU construction in Sunnyvale and across Santa Clara County from our office in Milpitas. Call (669) 588-3929 to arrange a free, no-obligation consultation.
