Accessory Dwelling Units (ADUS)

January 13, 2021

In a world where housing prices keep lower-income wage earners from home ownership, Perpetual Homes ADU of Danville off ers an exciting new way to help people into their own homes. Th e solution, Accessory Dwelling Units (ADU’s). ADU’s are sustainable, turn-key, backyard, energy-effi cient homes that are also known as granny fl ats, in-law units, secondary dwelling units, and tiny houses. ADU’s are custom-designed cottages loaded with fullsize kitchen appliances, shaker cabinets, quartz or granite counter-tops, high vaulted ceilings, and lots of natural light. With all of that included, the “all-in” low price begins at $165,000. While there are many suppliers for ADU’s, you have to be cautious of their starting price which lacks many of the high-end amenities that Perpetual Homes includes in one low price.


Many homeowners add an ADU to bring in extra rental income, others love having a private retreat where aging parents or loved-ones can live. Renting out your main house and living in an ADU in your backyard is becoming popular as well. In many cases, the main house rent covers both mortgages.

White cottage ADU with covered porch, windows, and dark roof, set on a green lawn with trees.

“Thousands of new ADUs are being built in communities across the U.S because they are a manageable and minimally disruptive option for adding desperately needed housing to existing neighborhoods,” says Kathy Anderson, founder and managing partner of Perpetual Homes.


Perpetual Homes ADU’s cost approximately 50% less than on-site “stick built” contractor built units, plus installation leaves a much cleaner job site. New California laws have made it easier than ever to add an ADU:

  • No minimum lot size is required
  • Side yard & rear yard setbacks of only 4 feet are allowed
  • No owner-occupant condition
  • No city or municipality impact fees under 750 sq ft . for an ADU
Interior of ADU with cozy living space with gray cabinets, sofa, and kitchen appliances; hardwood floors.

Perpetual Homes which started in 2019 off ers a wide variety of fl oor plans ranging from 1-3 bedrooms (430-1,200 sq. ft .) We have over 35 years of Bay Area home building experience. We manage the entire process from start to finish: from initial site inspection, permitting, site preparation, foundation, utility connections, construction, site clean-up, fi nal inspections and if wanted, property management. It’s hassle and worry free! To fi nd out more about adding an ADU, please contact Kathy Anderson (owner DL1557865) at 925-980-235, via email at perpetualhomesadu@gmail.com or visit www.perpetualhomesadu.com.

Modern kitchen and open living space. New  corporate Healdsburg ADU model from Perpetual Homes.
June 26, 2026
Discover why California homeowners are investing in prefab ADUs and homes for rental income, property value, flexibility, and multigenerational living.
Why California homeowners choose Perpetual Homes.
June 18, 2026
Perpetual Homes designs and builds high-quality prefab single-family detached homes, ADUs, and backyard homes that help California homeowners create additional living space, generate rental income, and support multigenerational living.
The Healdsburg model from Perpetual Homes ADU.
June 5, 2026
Looking for the best prefab home builder in California? Learn how to compare experience, timelines, customization, and value.
Carlsbad Single Family Open Concept Kitchen by Perpetual Homes
May 27, 2026
Design a custom prefab ADU, duplex, or single-family home with upgraded interiors, premium surfaces, roof styles, and flexible layouts.
White ADU from Perpetual Homes with front steps, large windows, and a small porch.
May 22, 2026
Prefab ADUs are reshaping California living with faster, efficient off-site construction and less disruption for homeowners and families.
Perpetual Homes’ eco-friendly, high-quality designs are made from premium, long-lasting materials.
May 17, 2026
Perpetual Homes provides solution to housing crisis with off-site construction of ADUs, duplexes, and single-family homes that are changing the ways families live.
Video Tour: Explore California Prefab ADUs and Modern Homes by Perpetual Homes
May 12, 2026
Turn your vision into a modern prefab ADU or home with Perpetual Homes, one of California’s leading ADU and single-family prefab builders.
The Newport Model from Perpetual Homes ADU is a Modern prefab single-family home.
May 5, 2026
Is building an ADU worth it in California? Learn how rising costs, policy changes, and flexible design make ADUs a smart long-term investment.
A backyard patio with a pool featuring the Claremont ADU from Perpetual Homes.
April 14, 2026
Pool or ADU? Learn why California homeowners are choosing ADUs for income, multigenerational living, and long-term property value.
Agate Bay 2 Bedroom, 2 Bathroom Model from Perpetual Homes ADU.
April 7, 2026
New 2026 California ADU bills build on January law changes. Learn how updated rules impact permitting, costs, and building timelines for homeowners.