ADU Design

We thrive on a wide mix of clients – adapting and developing design custom solutions to suit each client’s requirements.

Accessory Dwelling Units

Remodeling is the process of changing the functionality and the design of an area. It may involve tearing out a wall to expand a bathroom and reconfiguring a kitchen layout so the cabinets, fridge, sink, and range are in different locations. Constructing an addition to your home would also be considered a remodel.

Marry and Peter as a new married couple who just bought a 1600 square foot home in Fremont . However the house defined by dated features would drive anyone crazy.That’s why they came to us right away .

Marry looked up online and trusted the reviews and points we got ion thumbtack, she left a message there and emailed our her house pictures and some their ideas about how they wanna remodeling it . As mason got the pictures and all the data about this house , he called marry brief explained how it gonna works, how much it gonna cost, but for more accuracy, it would be better to go a onsite visiting.


After the onsite visiting measurement, mason was able to give a proposal with detailed scope of work and detailed cost for every single part send to marry. It was all clear and done, we started to work on the project as the proposal become official.

They wanted to remodeling the house to a clean, brighter, contemporary style. So mason suggest replace the outdated heavy door to the glass front door . The new doors complement the slider (on the left) that links the kitchen and the front patio.and an open floor plan, all-white walls, clean lines, mirrors, reflective surfaces, few furnishings, and lots of large windows with minimal window treatments. Also because of the budget issue , we suggest They installed sleek engineered-quartz countertops and budget-friendly IKEA cabinetry.


As all designs set up , we initialed it back to marry and peter , and scheduled a meetings to explain and confirm every single part of the drawings with them. It was delightful meetings ,they were satisfied with all the remodeling designs.

Frequently Asked Questions

If you’ve got that space, you’re off to a good start. But there are a number of other property size requirements, as well. United Dwelling focuses on detached ADUs, but it’s worth noting an ADU that’s attached to an existing home can only be 50% of the size of the main unit

For example, if a home is 2000 square feet, the attached ADU can max out at 1000 square feet.

On the other hand, a detached ADU can be up to 1200 square feet, no matter the size of the main building.

Generally speaking, an ADU has to be less than 16 feet tall. And if your ADU is below that 16 foot height and is under 750 square feet, its building permits can’t be blocked.

If you’re building an ADU within a home or existing building, the ADU can max out at the maximum height of the existing structure.

There are also requirements for minimum interior space and how it breaks down — unfortunately, if you were planning on building one giant bathroom in your ADU, you’re going to have to adjust your plans. The living room/bedroom needs to be at least 70 square feet.

The kitchen (along with the hallways and closet) must measure in at 50 square feet.The bathroom must be at least 30 square feet and contain a toilet, sink, and a shower stall or tub.

The size of your ADU is important, but just as crucial are the materials you use to build it. There are critical standards to ensure that granny flats represent high quality housing options. 

There are any number of exterior cladding options, but a few are against regulations. Builders may not use single piece composite, laminates, or interlocked metal sheathing. As for the roof, it can’t be made of wooden shingles. It must also have a minimum of a 2:12 pitch for greater than 50 percent of the roof area. 

Windows, meanwhile, must be at least double-pane glass and labelled for building use, and they can’t have exterior trim.

Thanks to AB 68, homeowners that turn their garages into ADUs (or knock the garage down to build an ADU from scratch) no longer have to replace the lost parking spaces.

Additionally, there is now no parking spot requirement at all for units built within half a mile from public transportation. Around LA, it’s rare that some place isn’t within a half mile of some kind of public transport.

You also don’t need a parking spot if you’re in a historic district.

According to California granny flat law, owners of single-family homes can now build both a regular detached ADU as well as a smaller unit that’s known as a Junior ADU.

A Junior ADU is a smaller ADU that is part of an existing main building; it can extend the building up to 150 square ft. feet beyond the original footprint of the house. In many cases, a junior ADU is a remodeled extra large bedroom or garage that includes its own bathroom and some kitchen appliances.

If you own a multi-family home, you can build two full-size ADUs on the property (provided you have the space for it, of course).

The Cecilia Workflow

At Cecilia Homes we do things differently, and it is our people that make the difference.

Get quote and sign contract

Contact us and get a detailed quote, and we will respond to your questions promptly. Sign a smooth contract and start your design

Site visit and measurement of data

We will arrange professional designers and surveyors to visit your home to determine the preliminary design and measure the data of your home

Begin design and ongoing follow-up

Start architectural design, structural design and mep design with your ideas, and meet with you in stages to discuss

Submit the application

Complete all the design and submit the application to city for you to ensure everything goes smoothly

Revision of comments from city

Don’t worry, we will revise all review comments from CITY and resubmit them.

get a Free model and drawing?

Please contact us for a set of free design models and drawings of Cecilia to give you inspiration and reference for your design

get a Free model and drawing?

Please contact us for a set of free design models and drawings of Cecilia to give you inspiration and reference for your design