Build a Modern Backyard Cottage.

Open the Door to Endless Possibilities.

Turn your property into a sanctuary, an income stream, or a multigenerational home for the ones you love ~ in Northern California and beyond.

Catalog: ADU Floorplans

Who are we?

Move into a beautiful backyard home at an affordable price.

Perpetual Homes designs and builds sustainable, backyard homes and ADUs (Accessory Dwelling Units) across Northern California—making it easy to expand your living space, care for loved ones, or generate passive rental income.


With more than 40 years of experience, we manage every step of the process—from design and permitting to construction and completion.


Founded by veteran developer Katherine Noe Anderson, Perpetual Homes is rooted in connection, community, and integrity. Our homes are designed to reflect how people really live, providing comfort, flexibility, and a true sense of belonging.

View the Catalog

Explore Your Designs—

Start Here

Choose from a wide selection of layouts—from compact studios to spacious four bedrooms. Our designs maximize space, style, and livability for modern life.

One-bedroom ADUs

Modern white tiny home with black trim, outdoor patio with wicker furniture.
One Bedroom Designs

Two-bedroom ADUs 

Two Bedroom Designs

Three-bedroom ADUS

Three Bedroom Designs

Three and Four Bedrooms

Browse Full Catalog

  • Slide title

    Write your caption here
    Button

10-step process

The Journey of Creating Your New Home, Made Simple

Our proven 10-step process takes you from your vision to reality—guided by experts every step of the way. 


Highlighted Steps: 

Step 1: Complimentary Virtual Assessment

Start Smart With Lot & Model Evaluation

Step 2: Feasibility Analysis

Confirm What’s Possible On Your Site

Step 3: Site Visit

Walk the Site, Answer Every Question

See All 10 Steps

What Sets Us Apart

Perpetual Homes

Why Thousands Trust Us to Build Their Future

  • One of California’s largest, most experienced, privately owned ADU companies
  • Our prefab partner named America’s Most Trusted Manufactured Home Builder five years running (2019–2024)
  • 40+ years in real estate development with deep ties to local agents and permitting offices
  • Woman- and family-owned,
  • rooted in integrity and connection

Why Thousands Trust Us to Build Their Future

  • No markup on site work → save 20–30%
  • Energy Star insulation → cut PG&E bills by up to 30%
  • High finish level included (approx. $15K in upgrades built into the base price)
  • Transparent pricing with financing resources available
  • 7-year warranty for peace of mind
  • Dedicated project coordination from start to move-in
  • Full permitting services and due diligence analysis
  • Customize your ADU to fit your lifestyle
  • Accredited
  • with the Better Business Bureau

  • Slide title

    Write your caption here
    Button

Our Story 

The Legacy Behind Perpetual Homes

At Perpetual Homes, we don’t just build ADUs—we build lasting legacies.


Founder Katherine Noe Anderson grew up in a family of builders, inspired by her great-grandfather’s churches and her father’s homes, she believed a house should be more than shelter—it should be a sanctuary.


After 35 years in real estate and development, Katherine launched Perpetual Homes to serve California’s “missing middle”: families seeking beautiful, affordable spaces that keep generations close.


Today, the tradition continues with her sons, Justin (civil engineer) and William (project manager)—a family building homes where people truly belong. 

Meet the Full Team

Perpetual Homes has been featured in:

  • Business Insider
  • Diablo Magazine
  • Dwell
  • East Bay Times
  • The New York Times
  • San Francisco Chronicle

"Perpetual Homes didn’t just build an ADU—they helped build our future. The process was smooth, transparent, and personal.”

—Joyce and Mike B., San Jose, CA