We provide complete ADU design and construction services across California, helping homeowners turn their properties into functional, high-value living spaces.
As an experienced ADU construction company, we manage every stage of the project — from initial planning and design to permits and full construction.
Our ADU construction services include:
Whether you’re looking for a reliable ADU contractor or a full-service builder, our team delivers efficient, code-compliant, and high-quality construction solutions across California.
Building an ADU in California is a strategic way to increase property value while adding functional living space without the need to purchase additional land. It allows homeowners to maximize their existing property and adapt it to changing needs.
Recent changes in California regulations have made ADU construction more accessible and streamlined, enabling faster approvals and more flexible design options. Homeowners can now efficiently add rental units, guest houses, or private living areas tailored to their lifestyle.
ADU construction offers both financial and practical advantages for homeowners looking to get the most out of their property.
With the right planning and construction approach, an ADU becomes a long-term investment that delivers both immediate usability and future financial return.
We offer a range of ADU construction options in California, each designed to fit different property layouts, budgets, and goals — from maximizing rental income to creating flexible living space.
An attached ADU extends your existing home, creating additional living space while maintaining a connected structure. This option is ideal for homeowners looking to expand their home efficiently without major changes to their property layout.
A detached ADU is a fully separate unit built on your property, offering maximum privacy and flexibility. It’s ideal for rental income, guest housing, or a dedicated home office space.
A junior ADU is a compact living unit created within your existing home. It’s a cost-effective solution for adding functional space, perfect for guests or long-term tenants.
A garage ADU conversion transforms your existing garage into a fully functional living space. It’s one of the most affordable ways to build an ADU while maximizing underutilized space.
A basement ADU conversion transforms underutilized space into a fully functional living unit. This option is ideal for creating private guest accommodations or rental units while maximizing your home’s existing footprint.
A second-story addition expands your home vertically, adding valuable living space without reducing your outdoor area. It’s an ideal solution for growing families or homeowners looking to significantly increase property value.
Our ADU construction process is designed to take you from concept to completion with clarity, efficiency, and full compliance with California regulations.
We begin with an in-depth consultation to understand your goals, property layout, and budget. Our team evaluates zoning regulations, site conditions, and ADU feasibility to identify the best approach for your project.
This step provides a clear understanding of costs, timeline, and permitting requirements before moving forward.
We develop the ADU layout, architectural plans, and key design details around your property, goals, and applicable requirements. Design decisions also consider buildability, budget, and construction from the beginning.
We prepare permit-ready documentation and coordinate submissions with the appropriate local jurisdiction, addressing plan-check requirements and revisions as the project moves toward approval.
We manage the full construction process, delivering a high-quality ADU that is fully compliant, functional, and ready for use.
With a structured and transparent approach, we make ADU construction in California simple, predictable, and stress-free.
Choosing the right ADU partner is essential to the success of your project. Ataman Studio combines architectural expertise, knowledge of California ADU requirements, and construction coordination to support projects from early planning through completion.
We help homeowners across California simplify the entire ADU process and create functional, high-quality living spaces with confidence.
The cost of building an ADU in California typically ranges from $150,000 to $350,000 depending on size, type, location, and site conditions.
Garage conversions are usually more affordable, while detached ADUs require a higher investment but offer greater flexibility and long-term value.
The ADU construction timeline usually ranges from 6 to 12 months, including design, permitting, and construction.
The exact timeline depends on project complexity, permit approval speed, and site conditions.
Yes, in most cases you can rent out your ADU in California. Many homeowners use ADUs to generate rental income or as long-term housing solutions.
Local regulations may vary, so it’s important to check city-specific rules.
ADU permit requirements in California depend on local zoning rules, property size, and utility access.
Most ADUs require approval for building plans, setbacks, and utility connections, but recent state laws have simplified and accelerated the permitting process.
Garage conversions are typically the most affordable type of ADU since they use an existing structure and require fewer construction resources.
