Start with the why.
Rental income, family housing, a guest house or a home office. The goal shapes the design.
Preferred Builders & Remodeling · Bay Area
Accessory Dwelling Units in the Bay Area
Accessory Dwelling Units in the Bay Area
Free Consultation
Detached backyard units, garage conversions and basement conversions. Preferred Builders designs, permits and builds accessory dwelling units, from design to construction.
LICENSE #1123883 · OVER 30 YEARS IN CONSTRUCTION & REMODELING
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Before the first plan
An ADU planned around
THE PURPOSE
THE TYPE
THE PAPERWORK
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.
Choose the right ADU.
Compare detached, attached, garage conversion and basement options for your lot.
Permits handled.
We prepare the plans, work through the City's ADU requirements and secure the permits.
What we take care of
ADU options
ADU options
for your property.
The right ADU depends on your lot, your existing home and how you plan to use the space.
Detached ADUs
New construction units built in the back or side yard of a single-family home, also called backyard cottages or granny flats.
Garage conversion ADUs
Convert an existing garage into a stylish and practical living unit.
Basement conversion ADUs
Turn a basement into an in-law unit or secondary suite with its own living space.
Attached ADUs and in-law suites
An in-law suite attached to the existing home, with its own entrance.
Junior ADUs (JADU)
A smaller unit created within the existing home for family members or guests.
Design and permits
Plans, 3D models and permit submittals prepared by our team.
Why choose us
Expertise, customized
Expertise, customized
solutions, satisfaction.
With over 30 years of experience in construction and remodeling, we bring expertise to every project. Every home is unique, so our approach is tailored to your needs and preferences, and your satisfaction is our priority from the first meeting to the final inspection.
Meet Preferred Builders
How we work
From the first visit
From the first visit
to the final inspection.
Four clear stages, so you always know what happens next.
We listen.
Call us or send the form to schedule a free, no-obligation consultation. We review your budget and brainstorm ideas.
We plan.
Our in-house designers create plans and 3D models for your approval.
We prepare.
Once you approve the design, we secure the necessary permits and confirm the schedule with you.
We create.
Construction begins once the permit is issued. We pass the final inspection, and your project is complete.
Our work
Recent projects
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.
View the project
Walnut Creek, CA
New custom home
A 3,000-square-foot house built from the ground up.
View the project
San Carlos, CA
Whole-house remodel
Kitchen, bathrooms, new flooring and a basement converted into living space.
View the project
Questions
ADU Construction questions,
ADU Construction questions,
answered.
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.
By city
ADU Construction
ADU Construction
near you.
Choose your city for local permit information, neighborhoods and directions from our Milpitas office.
Santa Clara County
San Mateo County
Alameda County
Contra Costa County
Bay Area service
Accessory Dwelling Units in the Bay Area,
Accessory Dwelling Units in the Bay Area,
from our Milpitas office.
We provide accessory dwelling units in the Bay Area from our office in Milpitas. We are a licensed contractor (License #1123883) with over 30 years of experience in construction and remodeling, working from our office at 1828 S Milpitas Blvd in Milpitas.
Every ADU we take on follows the same path, starting with a free consultation. Our in-house designers create plans and 3D models for your approval, we secure the necessary permits, and construction begins once the permit is issued, through the final inspection. Choose your city below for local permit information and directions from our office.
Before you hire a contractor
- Verify License #1123883 with the Contractors State License Board
- Read our reviews on Google
- See accessory dwelling units projects by our team
- Call (669) 588-3929 for a free, no-obligation consultation
Your home. Your next chapter.
Let’s talk about
Let’s talk about
your project.
Tell us what you want to change. Share your address, your timing and any photos you have.
(669) 588-3929
Start the conversation
A place for your ideas.
Whether you have a detailed vision or simply know something needs to change, start with a free, no-obligation consultation.
Tell us about your project Prefer email? Contact our team.