We service Los Altos Hills, CA and surrounding areas including zip codes 94022, 94024, 94304, and 94306.


Los Altos Hills’ ADU Regulations

Embrace the beauty of Los Altos Hills in your ADU project, with Acton ADU as your guide. Our expertise in local ADU regulations ensures your project not only meets but harmonizes with the area’s unique environmental and aesthetic standards. We decode zoning laws, permit intricacies, and more, paving a seamless path for your ADU project in the serene setting of Los Altos Hills.

Building Your Dream ADU in Los Altos Hills

Your ADU in Los Altos Hills should be a sanctuary that blends with the natural elegance of the area. Acton ADU specializes in creating spaces that respect the serene character of Los Altos Hills while fulfilling all regulatory requirements. We focus on sustainable building materials, energy efficiency, and designs that complement the picturesque landscape, crafting ADUs that are both environmentally conscious and aesthetically pleasing.

Custom ADU Designs for Los Altos Hills Lifestyles

In Los Altos Hills, your ADU should reflect the tranquility and sophistication of the locale. Acton ADU offers bespoke design solutions, ensuring your ADU is a perfect extension of your home and lifestyle. We delve into a range of options, from rustic charm to modern minimalism, all tailored to integrate seamlessly with your Los Altos Hills property. Let us help you find a design that’s not just compliant but a true reflection of your personal taste.

Excellence in ADU Construction for Los Altos Hills

In Los Altos Hills, constructing an ADU requires a builder who values precision, quality, and harmony with the natural surroundings. Acton ADU brings these qualities to every project. Our commitment to excellence in construction is matched by our respect for the unique environmental standards of Los Altos Hills. In this section, we’ll showcase our approach to building ADUs that are not only structurally sound but also blend beautifully with the local environment.

Transforming Your Los Altos Hills Property with an ADU

Imagine the possibilities that an ADU can bring to your Los Altos Hills property. Acton ADU is here to turn that imagination into reality. Contact us to explore how we can enhance your property with a custom ADU, designed and built to enrich your lifestyle and blend with the stunning backdrop of Los Altos Hills.

Imagine Your ADU in Los Altos Hills

Los Altos Hills is a welcoming community on the edge of Silicon Valley, and it’s a fantastic place to raise a family with the help of a high-quality backyard ADU. In addition, the city has excellent zoning regulations for the development of accessory dwelling units, such as a “granny flat” or “in-law suite,” and plenty of great locations to choose from.

You’ll be able to relax in the shade of your ADU during the day and enjoy the cool evening air at night. In addition to its proximity to some of the best hiking, biking, and swimming in the state, Los Altos Hills is home to some of the finest schools, parks, and cultural landmarks. However, there is a need for inexpensive housing due to the high cost of living; therefore, it may be to your advantage to construct an ADU.

If you’re looking for an ADU in Los Altos Hills, California, our team at Acton ADU can build the ideal unit for your family — one that satisfies all of your requirements and complies with all local ordinances. We have the credentials and knowledge to finish your project without a problem, and we back it up with a robust warranty in case problems arise. We can help you from the very beginning, with the design, through the obtaining of permits, and finally, the building itself.

If you’re in Los Altos Hills and want to build an accessory dwelling unit, give us a call right away. We hope to have the opportunity to collaborate with you!


The Construction of an ADU

Getting a high quality ADU built is no simple task. The process of planning and building an ADU in Los Altos Hills, 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 Los Altos Hills, 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 Los Altos Hills, CA

Acton ADU, operates in Los Altos Hills, 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 Los Altos Hills, CA, property that would otherwise go unused by adding an ADU. Call Acton ADU right away to get started!

Questions about ADUs in Los Altos Hills? Inquire Below
  • Attached
  • Detached
  • Junior

Get All the ADU Zoning & Regulation Details

CITY OR COUNTYLos Altos Hills, California
DATE UPDATED11/14/2022
ZONINGR-A (only existing single-family homes)
TYPES OF ADUSAttached, Detached, Junior
Note: New ADUs that provide on-site parking with rear and side setbacks of 30’ qualify for incentives in floor area and height.
STORIESDetached: One story max
MAXIMUM ADU FLOOR AREAa. The maximum size of a detached accessory dwelling unit that is a studio or with one (1) bedroom is eight hundred and fifty (850) square feet and the maximum size of an accessory dwelling unit with more than one (1) bedroom is one thousand (1,000) square feet
b. The maximum size of an attached accessory dwelling unit is one thousand (1,000) square feet or fifty (50) percent of the primary dwelling’s living area, whichever is less, provided that at least 800 square feet is allowed
c. The maximum size of a junior accessory dwelling unit is five hundred (500) square feet 
LOT COVERAGEFloor area up to 800 sq.ft. is exempt from a lot’s maximum development area (MDA) and maximum floor area (MFA). All floor area over 800 sq.ft. is counted
BEDROOMMin. 1 bedroom
STORAGENo min/max
KITCHENRequire separate kitchen facilities (permanent range, counters, refrigerator, and sink).
BATHRequires at least one full bathroom.
Note: Drainage and sewer connections should be assessed on a project by project basis.
SETBACKSFront of 40’, Side/Rear of 4’
PARKINGa. Vehicular access to an accessory dwelling unit from the nearest public or private street shall be provided by a common driveway with the primary dwelling
b. One (1) on-site parking space is required for accessory dwelling unit as follows:
1. The parking space may be covered or uncovered and shall be at least ten (10) feet wide by twenty (20) feet deep
2. The space may be provided as tandem parking on a driveway or located in a setback area, unless specific findings are made by the planning director that parking in a setback area or as tandem is not feasible based upon specific site or regional topographical or fire and life safety conditions
3. The parking space shall not encroach into a required fire truck turnaround or obstruct the driveway access to the primary dwelling

c. No additional on-site parking shall be required for an accessory dwelling unit or the primary dwelling unit for any of the following:
1. The unit is a junior accessory dwelling unit
2. When a garage, carport, or covered parking structure is demolished in conjunction with the construction of, or conversion to, an accessory dwelling unit
3. The unit is located within one-half mile walking distance of public transit
4. The unit is located within an architecturally and historically significant historic district
5. The unit is converted from existing floor area the primary dwelling or an existing accessory structure
6. When on-street parking permits are required but not offered to the occupant of the unit
7. When the unit is within one block of a car share vehicle
HEIGHTa. Attached: subject to primary residence
b. Detached: 16’
c. Detached – Incentives met for expansion: 19’.
DESIGNa. For a detached unit, it shall relate to the design of the primary dwelling by use of similar exterior wall materials, identified color tones, window types, door and window trims, roofing materials and roof pitch
b. For attached units, it shall be constructed so that the entire structure appears to be one dwelling including building form, colors, window styles, and window and door trims
c. Exterior wall colors and materials shall have a light reflectivity value (LRV) of fifty (50) or less and roof materials shall have a light reflectivity value (LRV) of forty (40) or less
ENTRYWAYSFor Detached units within 30’ of side or rear property lines, exterior entrance shall not face a side or rear property line.
SOURCE CODEImportant 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. Cheers!


Considering an ADU in Los Altos Hills, 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.