We service Campbell, CA and surrounding areas including zip codes 5008, 95009, 95011, 95032, 95117, 95125, 95128, and 95130.


ADU in Campbell, CA

As  California (as well as the rest of the world) becomes more urbanized , families find it more and more difficult to live close to one another. Families that want to maintain close ties with their loved ones may find this to be a considerable challenge. However, ADUs (accessory dwelling units) might offer a solution. ADUs can be located next to or part of the main house. They could be used by a young adult going out on their own, a guest house, or an aging relative. The best part is that they enable families to live close together without invading their privacy or individuality.

Mother-in-law suitesguest houses, and rental properties are typical applications for ADUs. They can also be quite helpful for families who want to stay in their existing location but need extra, flexible space for long-term living. For instance, a family with young children might use an ADU as a homeschool,  or a professional working from home as a dedicated office. An ADU can be a great solution for empty-nesters who want to downsize but still have room for out-of-town guests. ADUs are the ideal solution for families who require additional space. For instance, an ADU may be transformed into a mom’s hideaway or “she-shed.” Or you might make it a “man cave” where dad can take it easy. For families in Campbell, CA, who wish to stay in touch, ADUs are a popular choice.


The Construction of an ADU

Getting a high quality ADU built is no simple task. The process of planning and building an ADU in Campbell, CA, has its challenges, but also has tremendous rewards. We endeavor to make it as simple for you as possible. . Here is a brief description of how it works:

  • The first step in establishing whether your project meets the requirements for an ADU is to validate it. To ensure your property conforms to all rules, we’ll inspect it. Answer the question of what can actually be built on your property legally.
  • We’ll work with you to personalize your ADU.. There are numerous pre-designed layouts available that can be used right out of the box or tweaked to your needs. There are also many interior packages to choose from, with a variety of design options.
  • Once designed, we’ll acquire your ADU permit and then start building your ADU. Our experienced craftsmen will begin ADU construction to the exact specifications.

The Acton ADU procedure is intended to be straightforward. To ensure that your ADU in Campbell, CA, is exactly what you’ve envisioned, we’ll work directly with you at every stage. To start working on your project right now, get in touch with us!


Your ADU Contractors in Campbell, CA

Acton ADU, operates in Campbell, CA, as well as many other cities in the Bay Area. We have a group of knowledgeable experts who can work with you to design and construct the best ADU for your requirements. We also understand the applicable code requirements and can secure the required permissions for your project.

Adding an ADU can increase your home’s living space, potential income, and value. An ADU may be used for any purpose you can think of, such as a guest house or a home office. You might utilize additional space on your Campbell, CA, property that would otherwise go unused by adding an ADU. Call Acton ADU right away to get started!

Questions about ADUs in Campbell? Inquire Below
  • Attached
  • Detached
  • Interior

Get All the ADU Zoning & Regulation Details

CITY OR COUNTYCampbell, California
DATE UPDATED11/07/2022
ZONINGADUs are permitted in all residential zoning districts, including Planned Development (P-D) zoned areas that are designated by the Campbell General Plan as residential or mixed-use
TYPES OF ADUSAttached, Detached, Interior, JADU
STORIESDetached ADUs may be up to 2- stories if the primary home is also 2-stories. Attached and interior ADUs may also be constructed or created as a second floor. 
LOT SIZENo minimum lot size
MAXIMUM ADU FLOOR AREAa. A detached ADU may be up 1,200 square-feet (SF), not including an attached garage
b. An attached/interior ADU may not exceed 50% of the primary home’s living area
c. Junior: 500 SF
LOT COVERAGEUp to 800 square-feet of gross floor area of an ADU shall be exempt from the above area calculations
BEDROOMAll ADUs may include up to three bedrooms and three bathrooms. No other rooms or closets larger than 120 square feet are permitted unless they are entirely interior within the ADU without exterior walls
STORAGEMax 120 SF closets
KITCHENa. Max 1 kitchen (with permanent provisions for cooking and eating)
b. Junior ADU: Only efficiency kitchen permitted
BATHa. Max. 3 bathrooms
b. Junior ADU: May be shared with primary home or another ADU, but may also have its own bathroom that counts against 500 SF max size
Note: Drainage and sewer connections should be assessed on a project by project basis.
PARKINGa. Only newly-constructed detached ADUs must provide parking (1 space), unless an exception applies. A standard driveway satisfies this requirement.
b. Junior ADU: none required
POTENTIAL SETBACKSa. Front- Same as primary home
b. Interior Side→ 4’
c. Street Side→ 12’
d. Rear→ 4’
HEIGHTa. Attached: must comply with height applicable to the primary home..
b. Detached: single story 16’ max
LOCATIONAttached or interior ADU limited to the ground floor or the basement of the primary dwelling and must maintain appearance of primary dwelling as that of a single-family dwelling. Spacing between structures and lot coverage guidelines of zoning district apply.
REAR YARD COVERAGEMust comply with maximum allowable yard coverage of zoning district.
DESIGNa. Detached ADUs over 800 squarefeet and 16-feet in height must incorporate the same materials, colors, and predominant roof form and pitch as the primary home if not entirely located behind the primary home. Attached and interior ADUs must also maintain the appearance of the primary home. An ADU created from a garage must include replacement of the garage door with appropriate architectural features. 
b. Historically designated properties are only limited to interior or detached ADUs, with 1 story, 16’ in height, located behind the primary home and designed to match the primary home.
ENTRYWAYSMust include separate exterior access from primary dwelling. Front door cannot be oriented towards public street.
RESOURCES>> Campbell, California City Website
>> Campbell, CA City Housing Element Updates
>> Campbell, CA Post Offices
SOURCE CODEhttps://library.municode.com/ca/campbell/codes/code_of_ordinances?nodeId=TIT21ZO_ART3DEOPST_CH21.23ACDWUN 


Important Note: Rules and regulations are updated and changed frequently. It’s one of our jobs to be up to speed and navigate those regulations. Let us know if our website isn’t up to date or if you have any information that could help.


Considering an ADU in Campbell, CA? It’s a great way to enhance living space and boost property value. With Acton ADU, you’re partnering with experts who bring your vision to life. From design to construction, we’re with you every step of the way. Reach out today to explore the possibilities.