Interior of a finished Apex Homes ADU

Space for Family. Income. Freedom.

ADU Builder in the Bay Area:
Design, Permits & Construction

Detached, ground-up ADUs built in your backyard by one team, from first sketch to move-in.

Can you build on your lot? Check your address for free.

  • Rated 5.0 from 61 Google reviews
  • 70 ADUs completed
  • 4 pre-approved plans
  • Backed by AlphaX RE Capital
Transparent Pricing
Complete Turnkey Experience
Solar & Appliance Included
Complimentary Site Visit

ADU Floor Plans

Explore All Floor Plans

How We Build Your Detached ADU, Start to Finish

  1. Free

    Site Visit

    A free on-site review of zoning, setbacks, and utilities, with realistic recommendations for your lot.

  2. 1-2 weeks

    Design

    Work one-on-one with our design team to turn your vision into build-ready plans.

  3. 4-8 weeks

    Permit

    We manage every submission and follow-up with your city. Pre-approved plans can move faster.

  4. 4-6 months

    Build

    The same materials and build quality we use in our luxury custom homes.

  5. 1-2 weeks

    Move-In

    A detailed final walkthrough before you move in, with post-move-in warranty coverage.

See How It Works

Apex Homes vs. Other ADU Builders

  • We manage everything
  • Easily add space & value
  • Customizable by you
  • No-hassle installation
What you get
Apex Homes
Other Design-Builder
Other Contractor
Other Pre-fab Vendor

We know California ADU law closely: with the City of San José, we completed the state's first ADU condominium conversion. Read the story

ADU Open Houses & Webinars

See the ADUs we've opened to the public, or catch up on our latest webinar.

All events

Recent open house · Fremont 94538

Custom ADU Open House – Fremont, CA

Sunday, November 8, 2026

See the Recap

Latest webinar · Online

Pre-Approved ADU in San Jose

Recorded October 15, 2026

Watch the Recording

1-Bedroom ADU Floor Plans: Sizes, Layouts & Pre-Approved Options

A 1-bedroom ADU is the most affordable way to add a full, separate home to your property. It has its own kitchen, bathroom, and entrance, and it fits on lots where a larger unit won't. The right floor plan depends less on the square footage and more on the shape of your backyard. This guide covers typical 1-bedroom ADU sizes, the most common layouts, Apex Homes' two 1-bedroom plans, what they c...

Read More : 1-Bedroom ADU Floor Plans: Sizes, Layouts & Pre-Approved Options

Trusted ADU Builders Across California

Read more reviews

“The most Professional people you will meet. They know what they are doing”

Bao Tran

“Aimee is so personal and knowledgeable! Explains all the questions I could ever think of.”

Eva Panina

“Subject matter experts on all things ADU including SB10 and AB1033 processes.”

J

Get a Free ADU Estimate for Your Property

Tell us where you'd like to build. We'll review your property and walk you through what fits, what it costs, and how long it takes.

Prefer to talk? Call (408) 877-8080

Your free estimate

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