“Hands down, this was the easiest home renovations I've ever experienced. We had SGV ADUs create additional space on the ground floor leading into a new ADU. There was not a single delay or extra expense.”
Lucy M.
ADUs Conversion & Construction in the San Gabriel Valley
At San Gabriel Valley ADU Construction Contractors, we bring over 20 years of experience as an expert ADU contractor serving across the San Gabriel Valley of the Los Angeles region. This includes the cities of Rosemead, Temple City, San Gabriel, Pasadena, Arcadia, Montebello, Monrovia, and other surrounding areas. Whether you’re looking for a customized designed-for-you ADU, a seamless garage conversion (which accounts for 30% - 50% of new ADUs in Los Angeles area, according to the California Department of Housing), or a stylish stand alone backyard cottage, our team specializes in turning your vision into reality. We specialize in interpreting and applying your city’s and Los Angeles County's specific ADU regulations and building codes. These codes vary between cities like Pasadena, Rosemead, San Gabriel, and Pomona, etc.
San Gabriel Valley ADUs offers services ranging from initial design and planning to permitting and construction, with a focus on creating custom ADUs that meet your specific and individual needs and preferences.
ADU Construction and Conversion in the San Gabriel Valley of Los Angeles County, CA
San Gabriel Valley ADU Construction Contractors maintain current knowledge of setback requirements, height restrictions, and parking regulations unique to each jurisdiction. This expertise prevents costly mistakes and redesigns.
We can identify potential zoning issues before construction begins. We help determine the maximum allowable square footage and optimal placement on your property.In addition to ADU construction,
San Gabriel Valley ADU Construction Contractors handles all types of renovations; everything, from loft bathrooms to complete home renovations. Our process is transparent, so you get the design you want, within budget, and on time.
As a trusted ADU contractor and ADU builder, we manage every detail of the process—from ADU floor plans and zoning regulations to permits, financing guidance, and final construction. We’ve helped homeowners create ADU additions for extended family, build granny flats for multi-generational living, design ADU home offices, and develop rental units that generate reliable income.
When you choose San Gabriel Valley ADU Construction Contractors, you get more than construction—you get a partner dedicated to quality craftsmanship, top customer service, clear communication, and long-term results for you.

ADUs we can design, convert or build from scratch:
- ADU (Accessory Dwelling Unit): This is the official term for a any secondary self-contained living space on the same property as your primary residence.
- JADU (Junior Accessory Dwelling Unit): Some properties require a smaller unit (up to 500 sq. ft.) that may or may not share a bathroom or a kitchen with the main house.
- Garage Conversion: Almost half of all ADUs in the area. Here we transform an existing attached or detached garage into a livable dwelling unit. Garage conversion can be attached or detached depending on whether it shares a wall with the main residence or is stand alone.
- Granny Flat / In-law Suite / Guest House: These are common but informal terms for an ADU uses.
Types of ADUs We Build
In all, we build 13 different types of ADUs in the San Gabriel Valley of Los Angeles County, including garage conversions, detached backyard units, modular homes, and second-story additions—all tailored for comfort, local code compliance, and long-term value.
List of Services
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Strand Alone Backyard ADUsItem Link
A separate free-standing living unit built in your backyard—typically up to 1,200 square feet. It’s ideal for rental income, multigenerational living, or guest accommodations.
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Attached Room AdditionsItem Link List Item 2
This type of ADU is constructed as an extension to your existing home. The additions range from 400 to 1,200 square feet, it offers extra living space with direct access to the main living space.
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Garage ConversionsItem Link List Item 3
Converted garages generally range from 200 to 400 square feet in size. It's a legal living space in Los Angeles County, which is perfect for creating an independent rental or in-law suite.
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Junior ADUs (“JADU”s) Write a description for this list item and include information that will interest site visitors. For example, you may want to describe a team member's experience, what makes a product special, or a unique service that you offer.Item Link List Item 4
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Basement ADU ConversionsItem Link
Although less common in Southern California, we can convert your basement into a legal living unit (400–800 sq. ft.). Ideal for rentals or creating private living quarters.
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Multi-Unit Property ADUItem Link
Add 1–2 ADUs to a duplex or triplex. Maximizes rental income while staying compliant with San Diego County law.
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Above-Garage ADUItem Link
We can add 400–1,000 sq. ft. above your existing garage space. This can offer private, elevated living space with a separate entry
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Shipping Container ADUsItem Link
We can convert shipping containers (approx. 160–320 sq. ft.) into new compact rental units or studios. This option is eco-friendly and ideal for stand alone / backyard use.
How we start:
- Feasibility Study: An initial assessment to determine if a garage is suitable for conversion.
- Floor Plan / Layout: The design of the internal space, crucial for maximizing efficiency in typically small areas.
- Streamlined Process: For homeowners in the San Gabriel Valley, Pasadena, Temple City and Rosemead among other cities, we work with local, county and state agencies to take advantage of their streamlined processes, pre-approved plans, and supportive local regulations to optimize your ADU project.
In addition to ADU construction, we are one of the top kitchen and bath renovation firms in the San Gabriel Valley of Los Angeles County, CA. Related Companies:
How it works
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1. Send a request
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2. Take measurements
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3. Approve budget
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4. Start project
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5. Finish on schedule
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Testimonials
These are a few of our most recent testimonials we have received from clients:
"SGV ADU Construction Contractors did on outstanding job on our garage conversion. It was small, but we needed the space for an additional room in the house. Worked pefectly with minimal interruption to our daily lives. We have already recomended SGV ADU to friends."
Robert W.
"My wife was referred to this company from friends of hers and we are so glad we got the recommendation. We needed a granny flat for my mother-in-law. SGV ADUs worked with us on the design and how to fit it in our back yard within the zoning and other restrictions of the city of Pasadena. It came out beautifully and the MIL loves how it looks. "
Jose L.
