Full service
MyADU4Less is Southern California's premier full service design and build general contractor for the construction of your prefab Accessory Dwelling Unit.

MyADU4Less
Full-service design & build firm for prefabricated ADUs (Granny Flats) throughout Southern California.
Move-in-ready prefabricated ADUs with flooring, fixtures and appliances included.
Full-service delivery: design, permits, fabrication, foundation, utilities, and occupancy.
MYADU4Less is a division of USModular Inc. | 400+ completed homes and growing.
WHY MYADU4LESS
MYADU4Less is a division of USModular Inc., a premier prefabricated home general contractor and dealer in Southern California, with over 400 completed homes and growing.
Our full-service team handles design, engineering, permits, fabrication, delivery, foundation construction, utility connections, installation, inspections and the Certificate of Occupancy. We do it all!
Our ADUs are complete, move-in-ready homes with flooring, fixtures and appliances included. Prefabricated ADUs are typically up to 40% less expensive than comparable site-built ADUs and can be up to six months faster in permitting and construction, depending on property conditions, local approvals and project scope.
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FOUR REASONS
MyADU4Less is Southern California's premier full service design and build general contractor for the construction of your prefab Accessory Dwelling Unit.
All-inclusive pricing for standard sites. If your lot has special circumstances — hillside, sewer pumps, septic, crane — we determine any additional charges with you upfront, so you know your full cost to build.
Don't over-complicate your ADU project. Prefabricated ADUs can be up to six months faster to permit and build than a traditional site-built ADU, depending on property conditions, local approvals and project scope.
A free virtual site assessment tells you whether an ADU fits your property before you spend a dollar.
OUR MANUFACTURERS
Every MyADU4Less ADU is built in a factory by Champion Homes or Clayton Homes — two of the largest home manufacturers in the country. Factory building means tighter quality control, a predictable schedule, and far less disruption to your home and your neighborhood than a site-built ADU.
ONE OF THE LARGEST BUILDERS OF MANUFACTURED AND MODULAR HOMES IN THE UNITED STATES
ONE OF AMERICA'S LARGEST HOME BUILDERS, PRODUCING MANUFACTURED AND MODULAR HOMES
We confirm an ADU fits your property, then meet to prepare your budget.
Finalize your floor plan and options, sign the contract, and we complete and submit plans to your local building department.
Your ADU is built in the factory while permits are issued and we begin site construction, foundation and utilities.
Your ADU is delivered and installed, passes final inspection, and you have your house-warming party.
There are several ways to finance an ADU project — personal funds, a cash-out refinance, a home equity line of credit, a construction or remodeling loan, a reverse mortgage, or specialized lenders for Park Model RVs. MyADU4Less works with several lender partners who are familiar with prefabricated construction, but our clients are never required to use them.
See financing options →Tell us your property address and we'll run a free virtual site assessment to confirm an ADU fits, then give you real prices with no surprises and no obligation.
Get a Free Site Assessment →CUSTOMER STORIES
"Working with MyADU4Less for my ADU was easy — they did it all. Love my new ADU!"
"I'm now living next to my daughter and grandkids. Glad the MyADU4Less team worked with the city to get permits and build the ADU. Watching the crane lift my house into the backyard was very exciting."
"Started my ADU just before the Covid shutdown — it was a trying time, but MyADU4Less persevered, got permits and built me a beautiful ADU."
"I have a duplex and was able to permit 2 additional ADUs on my property. No brainer! I will double my rental income."
Based in Calimesa at 579 W. County Line Road, MyADU4Less designs, permits, builds, delivers and installs ADUs throughout Southern California.
site assessment.
Is one of our ADUs right for your property? Tell us your address and we'll assess the site, answer your questions and give you real prices — no surprises, no obligation.
579 W. County Line Road
Calimesa, CA 92320
(951) 679-9907 ext 1
info@usmodularinc.com
Monday – Friday · 9am – 4pm
Saturday & Sunday · Closed