ADU Design
California
Berkeley 500SF Garage Conversion ADU
A modern ADU design for a 500 square foot space in Berkeley, California.
Your Local Design & Engineering Experts
California Expert ADU Design And Engineering
Expand your living space with our specialized ADU design and engineering services in California. We manage permits, plans, and construction to bring your ADU vision to life.
Design and Engineering Services Throughout California
0
California Registered Civil Engineer
0+
Projects Completed
0%
Permit Approval Rate
0+
Professional Team Members
At Cecilia Home, we believe in providing clear and transparent architectural services that you can trust. Our experienced engineers and designers are committed to offering personalized solutions, whether you're dealing with complex home additions, seeking assistance with ADU designs, or managing residential remodeling projects. We simplify the architectural process, making it easy to understand and navigate.
Our team ensures that every client receives the most effective architectural strategies, all while building long-term relationships focused on achieving the best possible outcomes. With our California registered civil engineers and a 95% permit approval rate, we have successfully completed over 2,000 projects throughout California with exceptional results and unparalleled customer satisfaction.
Why You Need an ADU
Unlock the potential of your California property with a custom-designed Accessory Dwelling Unit (ADU). Cecilia Home provides expert ADU design and engineering services, making it easier than ever to expand your living space or generate rental income.
MAXIMIZE PROPERTY VALUE
Adding an ADU can significantly increase your property value in California's competitive real estate market. Invest in your future with a smart, value-added home improvement.
GENERATE RENTAL INCOME
Turn your backyard into a revenue source. An ADU provides an excellent opportunity to earn consistent rental income in high-demand California locations.
EXPAND LIVING SPACE
Need more room for family, guests, or a home office? An ADU offers flexible space solutions to adapt to your evolving needs without moving.
STREAMLINED PERMIT PROCESS
Navigating California ADU permits can be complex. We simplify the process, leveraging our expertise to ensure a smooth and efficient approval.
CUSTOMIZED DESIGN
Your ADU should reflect your style and needs. We offer personalized design services to create an ADU that perfectly complements your property and lifestyle.
EXPERT LOCAL GUIDANCE
Benefit from our deep understanding of California ADU regulations and construction practices. We ensure your project is compliant and successful from start to finish.
Types of ADUs For Your Property
Not sure which ADU type is right for your property? Don't worry, we're here to help you find the perfect solution.
Attached ADU
Extend your existing home with an attached unit, providing convenient access while maintaining separate living spaces.
Detached ADU
Build a separate structure on your property, offering maximum privacy and flexibility for tenants or family members.
Junior ADU (JADU)
Convert a portion of your existing home (up to 500 sq ft), perfect for maximizing space with minimal construction.
Basement ADU
Transform your underutilized basement into a comfortable living space, maximizing your property's potential with minimal exterior changes.
Our Process
Our process is designed to be transparent and efficient, delivering a complete one-stop service from design to final permit approval.
1
Free Consultation
Expert advice on your project needs, budget considerations, and permit requirements.
2
On-Site Assessment
Precise measurements and site evaluation for accurate project planning.
3
Design Development
Creating detailed plans and visualizations to bring your vision alive.
4
Permit Acquisition
Navigating complex approval processes to ensure code-compliant construction.
5
Construction Support
Ongoing guidance and contractor coordination throughout the building process.
Featured ADU Projects
Explore our recently completed ADU projects throughout California. Each design showcases our dedication to quality, functionality, and aesthetic excellence.
Frequently Asked Questions
Answers to common questions about ADUs, design, permits, and more.
Loved By Homeowners
Don't just take our word for it. Here's what our satisfied clients have to say about their experience working with us.
★★★★★
Working with Mason on our ADU project was truly transformative. His expertise in California ADU regulations and Cecilia Home's detailed design process resulted in a perfect space that maximizes our property value. Their ability to navigate the complex permit process saved us countless hours and potential headaches.
Michael Rodriguez
Palo Alto, CA
★★★★★★
Cecilia Home designed our backyard ADU with remarkable attention to detail. From the initial consultation to final inspection, Mason and his team were professional and thorough. Our 600 sq ft ADU now serves as a beautiful home office and guest suite that perfectly complements our main residence.
Emily Chen
Fremont, CA
★★★★★★
As a first-time ADU investor, I was nervous about the process. Mason at Cecilia Home walked me through every step, from ADU site placement to maximizing rental potential. Their 3D renderings helped me visualize the final product before breaking ground. The finished ADU now generates substantial rental income.
James Wilson
San Jose, CA
★★★★★
We needed an ADU for my aging parents that was both accessible and beautiful. Cecilia Home delivered beyond our expectations. Their expertise in California ADU regulations allowed for maximum square footage while Mason's design incorporated subtle accessibility features that don't look institutional. The ADU feels like a natural extension of our home.
Sophia Martinez
Berkeley, CA
★★★★★★
Converting our garage into an ADU seemed impossible until we consulted with Mason at Cecilia Home. Their creative approach to California ADU conversions maximized our limited space while maintaining parking. The permitting process was handled entirely by their team, making what could have been stressful completely seamless.
Daniel Park
Oakland, CA
★★★★★★
Our hillside property presented unique challenges for ADU construction. Cecilia Home's structural expertise made our dream ADU possible. Mason's innovative design integrated the ADU beautifully with the natural landscape while ensuring structural integrity. The finished ADU has become the highlight of our property - guests can't believe the views!
Rebecca Johnson
Mill Valley, CA
★★★★★
Working with Mason on our ADU project was truly transformative. His expertise in California ADU regulations and Cecilia Home's detailed design process resulted in a perfect space that maximizes our property value. Their ability to navigate the complex permit process saved us countless hours and potential headaches.
Michael Rodriguez
Palo Alto, CA
★★★★★★
Cecilia Home designed our backyard ADU with remarkable attention to detail. From the initial consultation to final inspection, Mason and his team were professional and thorough. Our 600 sq ft ADU now serves as a beautiful home office and guest suite that perfectly complements our main residence.
Emily Chen
Fremont, CA
★★★★★★
As a first-time ADU investor, I was nervous about the process. Mason at Cecilia Home walked me through every step, from ADU site placement to maximizing rental potential. Their 3D renderings helped me visualize the final product before breaking ground. The finished ADU now generates substantial rental income.
James Wilson
San Jose, CA
★★★★★
We needed an ADU for my aging parents that was both accessible and beautiful. Cecilia Home delivered beyond our expectations. Their expertise in California ADU regulations allowed for maximum square footage while Mason's design incorporated subtle accessibility features that don't look institutional. The ADU feels like a natural extension of our home.
Sophia Martinez
Berkeley, CA
★★★★★★
Converting our garage into an ADU seemed impossible until we consulted with Mason at Cecilia Home. Their creative approach to California ADU conversions maximized our limited space while maintaining parking. The permitting process was handled entirely by their team, making what could have been stressful completely seamless.
Daniel Park
Oakland, CA
★★★★★★
Our hillside property presented unique challenges for ADU construction. Cecilia Home's structural expertise made our dream ADU possible. Mason's innovative design integrated the ADU beautifully with the natural landscape while ensuring structural integrity. The finished ADU has become the highlight of our property - guests can't believe the views!
Rebecca Johnson
Mill Valley, CA
★★★★★
Working with Mason on our ADU project was truly transformative. His expertise in California ADU regulations and Cecilia Home's detailed design process resulted in a perfect space that maximizes our property value. Their ability to navigate the complex permit process saved us countless hours and potential headaches.
Michael Rodriguez
Palo Alto, CA
★★★★★★
Cecilia Home designed our backyard ADU with remarkable attention to detail. From the initial consultation to final inspection, Mason and his team were professional and thorough. Our 600 sq ft ADU now serves as a beautiful home office and guest suite that perfectly complements our main residence.
Emily Chen
Fremont, CA
★★★★★★
As a first-time ADU investor, I was nervous about the process. Mason at Cecilia Home walked me through every step, from ADU site placement to maximizing rental potential. Their 3D renderings helped me visualize the final product before breaking ground. The finished ADU now generates substantial rental income.
James Wilson
San Jose, CA
★★★★★
We needed an ADU for my aging parents that was both accessible and beautiful. Cecilia Home delivered beyond our expectations. Their expertise in California ADU regulations allowed for maximum square footage while Mason's design incorporated subtle accessibility features that don't look institutional. The ADU feels like a natural extension of our home.
Sophia Martinez
Berkeley, CA
★★★★★★
Converting our garage into an ADU seemed impossible until we consulted with Mason at Cecilia Home. Their creative approach to California ADU conversions maximized our limited space while maintaining parking. The permitting process was handled entirely by their team, making what could have been stressful completely seamless.
Daniel Park
Oakland, CA
★★★★★★
Our hillside property presented unique challenges for ADU construction. Cecilia Home's structural expertise made our dream ADU possible. Mason's innovative design integrated the ADU beautifully with the natural landscape while ensuring structural integrity. The finished ADU has become the highlight of our property - guests can't believe the views!
Rebecca Johnson
Mill Valley, CA
We are your trusted design and engineering experts.
Since 2019, Cecilia Home has delivered premium architectural design and construction solution across California. Our collaborative approach combines technical expertise with personalized attention, ensuring each project reflects your unique vision and exceeds your expectations.
