Build a Custom Prefab ADU or Home in California

Design a high-end prefab ADU or home for family, rental income, or multigenerational living. Proudly serving homeowners throughout California.

Catalog: ADU Floorplans

—Open the Door to Endless Possibilities

Who are we?

One of the largest privately-owned, family-run ADU builders in California.

At Perpetual Homes, we design and build sustainable, backyard homes and ADUs (Accessory Dwelling Units) for homeowners across Northern California. Our prefab ADUs make it easier to expand your living space, care for loved ones, support multi-generational living, or create 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.

What We Build

Our prefab ADUs and homes are designed for homeowners and developers seeking high-quality, customizable prefab housing solutions throughout California.

Prefab ADU from Perpetual Homes in Danville, CA
Multi-Family duplex from Perpetual Homes ADU
The Calistoga by Perpetual Homes ADU 3-bed, 2-bath Single-Family Home
Residential Prefab ADU and home communities from Perpetual Homes ADU.

Get Started

Move into a thoughtfully designed prefab ADU or home at an affordable price.

Whether you are early in the planning process or evaluating your next steps, our Perpetual Homes ADU team can help you understand potential options for your property. A free virtual site assessment offers a high-level look at your property and an overview of how a prefab ADU may fit your space, goals, and local requirements.

View the Catalog

Find a Design That Fits Your Property

From backyard and multifamily ADUs to single-family homes and residential developments, Perpetual Homes ADU designs and builds customizable prefab housing solutions throughout California. Compare models and explore layouts based on your property, lifestyle, and goals. Select models are available to tour by appointment at our Northern California locations.

One-Bedroom ADUs

The Belmont from Perpetual Homes ADU - a modern white tiny home with black trim.
Perpetual Homes ADU: Bright white kitchen with stainless steel appliances, butcher block island, and light wood flooring.
Perpetual Homes ADU: Small white house with bay window, stone entry, and red door. Set in a green yard with bushes and trees.
Perpetual Homes ADU: Modern kitchen with light gray cabinets, stainless steel appliances, and gray countertop.
One Bedroom Designs

Two-Bedroom ADUs 

The Del Mar model by
Perpetual Homes ADU Energy Efficient Open Floor Plan Design
Perpetual Homes ADU: White modular home with a paved walkway, trees, and blue sky.
Perpetual Homes ADU: Modern white bathroom with shower, double sink vanity, and black accents.
Two Bedroom Designs

Three-Bedroom ADUs

Perpetual Homes ADU: White modern house with covered porch, landscaping, and blue sky.
Perpetual Homes ADU: Modern kitchen with white cabinets, dark island, stainless steel appliances, and wood flooring.
Perpetual Homes ADU: White modular home with gray roof and covered porch, set on a grassy lawn with trees in the background.
Perpetual Homes ADU: Living room with gray sofa, armchairs, coffee table, art, windows, and TV.
Three Bedroom Designs

Three-and Four-Bedroom Single Family Homes and Duplexes

The Carlsbad model by Perpetual Homes ADU
Carlsbad Single Family Open Concept Kitchen by Perpetual Homes ADU
The Glacier Duplex Floorplan by Perpetual Homes ADU
Perpetual Homes ADU: Modern white kitchen with a gray island, stainless steel appliances, and pendant lights.
Browse Full Catalog
  • Perpetual Homes ADU: Kitchen with white cabinets, dark blue island, white countertops, and wooden stools.

    Slide title

    Write your caption here
    Button

10-step process

The Journey of Creating Your New ADU Home, Made Simple

Our proven 10-step process takes you from your vision to reality, guided by the Perpetual Homes ADU team supporting you every step of the way. 


Highlighted Steps: 

Laptop displaying a checklist.

Step 1: Complimentary Virtual Assessment

Start Smart With Lot & Model Evaluation

Person with check mark and X above their arms, indicating choice or decision.

Step 2: Feasibility Analysis

Confirm What’s Possible On Your Site

Black and white illustration of a house with a leaf, smoke coming out of the chimney.

Step 3: Site Visit

Walk the Site, Answer Every Question

See All 10 Steps

What Sets Us Apart

Perpetual Homes

Why Thousands of California Homeowners Trust Us to Build Their Future

  • One of California’s largest, most experienced, privately owned ADU companies
  • Awarded 2026 Prefab ADU Development Company of the Year for innovation and excellence in prefab ADU development
  • Our prefab partner, named America’s Most Trusted Manufactured Home Builder six years running (2021–2026)
  • 40+ years in real estate development with deep ties to local Northern California agents and permitting offices
  • Woman- and family-owned ADU company, rooted in integrity and connection
  • Accredited with the Better Business Bureau (A+ Rating)

What You Get

  • No markup on site work → save 20–30%
  • Energy Star insulation → reduce PG&E bills by up to 30%
  • High finish level included (approx. $20k-$30k included features in base price)
  • Transparent ADU pricing with financing resources available
  • 7-year warranty for peace of mind
  • Dedicated ADU project coordination from start to move-in
  • Full permitting services and due diligence analysis
  • Customize your ADU to fit your lifestyle and property
  • Katherine Noe Anderson, founder of Perpetual Homes ADU in Danville, CA

    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. From an early age, she believed a house should be more than shelter—it should be a sanctuary.


After more than 40 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 Our Team

PERPETUAL HOMES IN THE NEWS

As Featured In

5-STAR REVIEWS

What our clients are saying.

Quote Icon

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

- Joyce and Mike B.

Quote Icon

The team at Perpetual Homes is amazing to work with. They definitely go above and beyond. Highly recommend for your ADU needs.

- Jesse C.

Quote Icon

Our model from Perpetual Homes is stunning! Kathy and her team took care of everything. The whole process was so easy, and we are extremely happy with our ADU.

- Caroline W.