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MyADU4Less

Full-service design & build firm for prefabricated ADUs (Granny Flats) throughout Southern California.

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    Beautiful backyard homes.
    Made simple.

    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.

    Explore all ADU models Free site assessment

    Why prefab?

    Up to 40% less than comparable site-built ADUs
    Up to 6 months faster to permit and build*

    *Cost and timing depend on property conditions, project scope and local approvals.

    Explore four beautiful ADU collections

    400 to 600 sq. ft. contemporary compact ADU 400–600 sq. ft. Compact and Cute 600 to 900 sq. ft. Craftsman-style ADU with covered porch 600–900 sq. ft. Small but Large Feel 900 to 1,200 sq. ft. traditional cottage ADU 900–1,200 sq. ft. Family Size 1,106 sq. ft. two-story ADU 1,106 sq. ft. Cool 2 Story · 3 BR, 2 BA
    579 W. County Line Road ✦ Calimesa, CA ✦ (951) 679-9907 ✦ FREE SITE ASSESSMENT ✦ PREFABRICATED ADUs ✦ SOUTHERN CALIFORNIA ✦ MANUFACTURED, MODULAR & TINY HOMES ✦ FULL SERVICE DESIGN & BUILD ✦
    579 W. County Line Road ✦ Calimesa, CA ✦ (951) 679-9907 ✦ FREE SITE ASSESSMENT ✦ PREFABRICATED ADUs ✦ SOUTHERN CALIFORNIA ✦ MANUFACTURED, MODULAR & TINY HOMES ✦ FULL SERVICE DESIGN & BUILD ✦

    WHY MYADU4LESS

    One team. One contractor.
    From concept to completion.

    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.

    Step inside

    Kitchen with island seating inside a MyADU4Less ADU
    Living room inside a MyADU4Less ADU
    Primary bedroom inside a MyADU4Less ADU
    Open great room inside a MyADU4Less ADU
    Bathroom vanity inside a MyADU4Less ADU
    Living room and kitchen inside a MyADU4Less ADU
    Click here to see ALL ADUs →

    FOUR REASONS

    01

    Full service

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

    02

    All-inclusive pricing

    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.

    03

    Fast 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.

    04

    Free site assessment

    A free virtual site assessment tells you whether an ADU fits your property before you spend a dollar.

    FLOOR PLANS

    Find the ADU
    that fits your lot.

    View all floor plans →

    OUR MANUFACTURERS

    Built by two of
    America's largest.

    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.

    01

    Champion Homes

    ONE OF THE LARGEST BUILDERS OF MANUFACTURED AND MODULAR HOMES IN THE UNITED STATES

    02

    Clayton Homes

    ONE OF AMERICA'S LARGEST HOME BUILDERS, PRODUCING MANUFACTURED AND MODULAR HOMES

    Interior of a modern custom home
    HOW IT WORKS

    From free assessment
    to house-warming.

    01

    Free virtual site assessment

    We confirm an ADU fits your property, then meet to prepare your budget.

    02

    Design and contract

    Finalize your floor plan and options, sign the contract, and we complete and submit plans to your local building department.

    03

    Fabrication and permits

    Your ADU is built in the factory while permits are issued and we begin site construction, foundation and utilities.

    04

    Delivery, install, final inspection

    Your ADU is delivered and installed, passes final inspection, and you have your house-warming party.

    See the full 12-step process →
    FINANCING

    ADU financing
    in California.

    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 →
    FREE ASSESSMENT

    Not sure it
    fits?

    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

    See why people love building with us.

    "Working with MyADU4Less for my ADU was easy — they did it all. Love my new ADU!"

    — Leslie, Oceanside CA

    "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."

    — Dora, Santa Ana CA

    "Started my ADU just before the Covid shutdown — it was a trying time, but MyADU4Less persevered, got permits and built me a beautiful ADU."

    — Tamara, Los Angeles CA

    "I have a duplex and was able to permit 2 additional ADUs on my property. No brainer! I will double my rental income."

    — Mary, Vista CA

    SERVICE AREA

    Serving all of
    Southern California.

    Based in Calimesa at 579 W. County Line Road, MyADU4Less designs, permits, builds, delivers and installs ADUs throughout Southern California.

    San Diego County
    Riverside County
    San Bernardino County
    Orange County
    Los Angeles County
    Vista
    Poway
    Escondido
    Calimesa
    Fallbrook
    Altadena
    Temecula
    Palm Springs
    Long Beach
    GET STARTED

    Get a free

    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.

    ADDRESS

    579 W. County Line Road
    Calimesa, CA 92320

    CALL

    (951) 679-9907 ext 1

    EMAIL

    info@usmodularinc.com

    HOURS

    Monday – Friday · 9am – 4pm
    Saturday & Sunday · Closed

    Get a Free Site Assessment →
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