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Expert ADU designs and builds in California by home renovation specialists

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Our company provides California approved ADU plans and home revamping services across California, including Los Angeles, Beverly Hills, Newport Beach, Orange County, and the Irvine Area and more. Whether you need an adu designer or construction permits, our expert team delivers quality solutions tailored to your needs, wherever you are in the state.

Happy couple handing keys to a new tenant in front of a modern ADU

Why build an ADU and what exactly is it?

An Accessory Dwelling Unit exists as a fully habitable house that comes either inside or next to the main house. The official names for this structure are ADU and casita and guest cottage. The structure of an ADU may exist separately from the main dwelling or it can form as an expansion or through renovating current living areas. Building ADU provides homeowners with dual purposes either as a source of rental cash flow or to meet their family needs.


How an attached ADU can boost Your property’s value

  • Additional income: Renting out additional space can help cover your mortgage or other expenses. Around 40% of California homeowners rent these units for extra cash flow.
  • Boost property value: Adding extra living space, such as an ADU with loft, can raise your home’s value by up to 30%, making it a smart and profitable investment.
  • Flexible living arrangement: Perfect for accommodating family members or guests, offering privacy while utilizing extra space efficiently, consider our house plans with detached garage and guest house.
  • Affordable housing solution: These units provide an affordable rental option, helping to address the housing crisis. In some areas, construction has increased by 50% in this year.
  • Efficient use of space: Maximize your property without the need for more land, especially in densely populated urban areas, by exploring our ADU plans, promoting sustainable development.

How we approach ADU design and construction, revamping services in California


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Understanding your design needs

We start with a conversation to capture your vision, whether you’re planning to build ADU or remodel your home, gathering key details through a simple questionnaire.

ADU Solutions for Business Expansion in Agoura Hills

Design consultation and site assessment

The site assessment along with initial design discussions is included in a consultation fee. We issue free cost quotes based on the outcomes of our examination.

Lawyer reviewing a legal document.

Proposal approval and contract signing

The project moves into design implementation upon your approval of the proposal before we finish the contract.

A flowchart illustrating the ADU construction process from design to completion.

Design phases and client collaboration

During each process we maintain close collaboration to ensure the final design meets your specific requirements.

Black and white architectural drawing of a modern house.

Completing your design plan

The fulfillment of your vision is our purpose which leads to designing a functional space that fits your every demand.

Why choose us for your ADU design and construction project?

Building a guest cottage is simple and stress-free with our comprehensive services. Here’s how we help homeowners in California maximize their property’s potential:

  • Expert Guidance from Start to Finish: From design to permitting and construction, we ensure a seamless process for your granny flat or guest house.
  • Tailored Solutions for Every Home: Whether you need a detached cottage, garage conversion, or in-law suite, we create designs that fit your property and goals.
  • Trusted Professionals: We work with licensed contractors to build your guest cottage with precision and reliability.
  • Dedicated Support: Our team keeps you informed and answers all your questions throughout the project.

Family relaxing in the backyard of a solar-powered ADU

Discover the cities we serve for expert build ADU and design solutions in California.


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If you’re searching for accessory dwelling unit builders near you, contact us today to confirm availability and learn how we can assist with your ADU design, construction permits, and building needs.

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Aerial view of a residential property with a digital overlay illustrating a potential ADU location and footprint.

Our ADU designs, construction, and additional services for your home


We generate extensive reports about accessory housing feasibility that shows you what your property can achieve.

  • Site Map Drawings: The building design requires specific detailed scaled drawings to plan backyard cottage projects.
  • Zoning Research: Our team analyzes what local regulations allow regarding your ADU building by determining both the distance boundary from your house and utility line positions.
  • Construction Approvals and Permits: Our team oversees the complete permitting steps to guarantee that all construction prerequisites become ready for the start of building work. Building in an unauthorized manner without legal permits results in both mandatory fines starting at $350 and ending at $1,500 along with major delays.
  • Customized ADU Footprint and Design: We provide an evaluation of your property space to discover where your ADU needs to be built. Our subject experts deliver customized advice which will help you select optimal ADU designs and let you obtain ideal solutions for your space.
  • Virtual Design and Construction (VDC): Our company uses Building Information Modeling (BIM) digital technology to generate an electronic project model that helps maintain enhanced planning while ensuring better coordination between teams across design stages and construction phases.

Frequently asked questions about building and designing ADUs in California

The project team addresses the most frequent inquiries pertaining to ADU build and design in California.


How much to build an ADU in california​?

The construction of an Accessory Dwelling Unit (ADU) in California requires an investment whose amount depends on structure size, design approach, and site location. To build ADU, you can expect an average investment between $200,000 and $500,000. Adding this unit to your property not only increases market value but also provides rental income, which can help recover your initial construction costs.

How long does it take to get the permits?

The permitting procedure for ADUs in California depends on various conditions. Local agencies must evaluate ADU permit applications according to state law but applications frequently require more than 60 days for approval or rejection. The duration of permit approvals extends beyond 60 days because of factors such as complexity levels of projects and city planning demands and local regulatory requirements. A standard ADU permitting process in Los Angeles required 260 days to approve within areas falling under the Coastal Zone regulations yet it only needed 147 days for locations beyond this zoning area. Our team operates with efficiency to prepare proper documentation which reduces problems with processing times.

How big can an ADU be in california​?

The maximum size of an ADU in California depends on the local zoning laws and your property size. Generally, an ADU can range from 400 to 1,200 square feet, with restrictions varying by city. In some areas, you may be allowed to build larger ADUs if the property allows for it.

Can I customize my ADU design?

Absolutely! Our company provides personalized ADU designs which match your current house architecture and fulfill your unique requirements. Your personal touches to an ADU improve both functionality and appearance which could result in a twenty percent increase of your property value. Our design team collaborates with you for individual design preferences that lead to a final product which fulfills your vision.

Will the construction of an ADU influence my ability to sell my home?

Legitimate build ADU design approaches can lead to substantial increases in your housing market prices when selling. ADU constructions that consider location and design characteristics may boost property value between 20% and 30%. The rental earning potential of ADUs acts as a market enhancer that attracts potential buyers since it provides supplementary income sources.

What would be the best method to integrate an ADU with my current house?

Planning and design efforts are necessary to properly merge an ADU with your existing house. Your property’s design layout will be evaluated to create solutions which will integrate the ADU with your existing structure. The design plan enhances look and operation of the ADU while preserving the original structure of the primary house.

How do I apply for an ADU grant in California?

To apply for an ADU grant in California, you need to check with local programs offering funding or assistance for construction. Many cities and counties provide incentives or grants to encourage the development of ADUs. You can visit your local government’s website for eligibility details and how to apply.

What qualifies as an ADU in california​?

In California, an ADU (Accessory Dwelling Unit) is a secondary residential unit located on a property with a primary residence. It can be a separate unit or a converted space, such as a garage or basement. ADUs must include cooking, bathing, and sleeping facilities to qualify.

Can I sell my ADU in california​?

Yes, you can sell an ADU in California, but it is typically sold with the primary residence. If the ADU is attached to the primary home, it will likely be considered part of the property when sold. If the ADU is a separate structure, it may be sold independently depending on local regulations.

Can you sell ADU separately in california​?

Selling an ADU separately from the main house in California can be complex. In most cases, an ADU is considered part of the overall property, and selling it separately may require special permits and subdivision of the property. Local regulations vary, so it’s important to consult with a real estate professional or legal expert.


Have More Questions? Find Answers in Our FAQ Section!

Your ADU construction journey begins right now at our expert design service

You should weigh between building a garage apartment and a detached family home with an in-law suite or converting a room into living space. Our company specializes in ADU designs throughout California that combine superior construction quality with virtual design services. The team takes responsibility for obtaining all construction permits while checking all work against established guidelines.
Obtain your personalized free quote during our no-cost consultation by contacting us right now. We will assist you to develop your perfect ADU offering exactly what you require.


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