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ADU Construction Experts in LA County.
Over 20 years of experience. From design to permits to build — we handle it all.
ADU Construction Experts in LA County.
Over 20 years of experience. From design to permits to build — we handle it all.
ADU Construction Experts in LA County.
Over 20 years of experience. From design to permits to build — we handle it all.
Fill Out The Form Below And Start Your Dream ADU
Fill Out The Form Below And Start Your Dream ADU


Attached Or Detached Custom ADU
We design and build fully customized ADUs, either attached to your home or standalone. Includes kitchen, bathroom, living space, and bedrooms— tailored to your property and needs.


Junior ADU
Smaller units within your existing home (up to 500 sq, ft.) with an efficiency kitchen. Quick, cost-effective, and perfect for rental income or extra living space.


Garage Conversion
Convert your unused garage into a functional ADU. We handle design, construction, and permitting for a seamless transformation


Attached Or Detached Custom ADU
We design and build fully customized ADUs, either attached to your home or standalone. Includes kitchen, bathroom, living space, and bedrooms— tailored to your property and needs.


Junior ADU
Smaller units within your existing home (up to 500 sq, ft.) with an efficiency kitchen. Quick, cost-effective, and perfect for rental income or extra living space.


Garage Conversion
Convert your unused garage into a functional ADU. We handle design, construction, and permitting for a seamless transformation


Attached Or Detached Custom ADU
We design and build fully customized ADUs, either attached to your home or standalone. Includes kitchen, bathroom, living space, and bedrooms— tailored to your property and needs.


Junior ADU
Smaller units within your existing home (up to 500 sq, ft.) with an efficiency kitchen. Quick, cost-effective, and perfect for rental income or extra living space.


Garage Conversion
Convert your unused garage into a functional ADU. We handle design, construction, and permitting for a seamless transformation
What is an ADU?
An Accessory Dwelling Unit (ADU) is a small, secondary housing unit built on the same lot as your main home.
ADUs are also known as granny flats, in-law units, casitas, or secondary suites.
They are a smart investment for homeowners looking to increase property value, create rental income, or provide housing for family members.
An Accessory Dwelling Unit (ADU) is a small, secondary housing unit built on the same lot as your main home.
ADUs are also known as granny flats, in-law units, casitas, or secondary suites.
They are a smart investment for homeowners looking to increase property value, create rental income, or provide housing for family members.
ADUs are increasingly popular in LA County due to their affordability, flexibility, and ability to meet growing housing needs.
ADUs are increasingly popular in LA County due to their affordability, flexibility, and ability to meet growing housing needs.
What is an ADU?
An Accessory Dwelling Unit (ADU) is a small, secondary housing unit built on the same lot as your main home.
ADUs are also known as granny flats, in-law units, casitas, or secondary suites.
They are a smart investment for homeowners looking to increase property value, create rental income, or provide housing for family members.
An Accessory Dwelling Unit (ADU) is a small, secondary housing unit built on the same lot as your main home.
ADUs are also known as granny flats, in-law units, casitas, or secondary suites.
They are a smart investment for homeowners looking to increase property value, create rental income, or provide housing for family members.
ADUs are increasingly popular in LA County due to their affordability, flexibility, and ability to meet growing housing needs.
ADUs are increasingly popular in LA County due to their affordability, flexibility, and ability to meet growing housing needs.
What is an ADU?
An Accessory Dwelling Unit (ADU) is a small, secondary housing unit built on the same lot as your main home.
ADUs are also known as granny flats, in-law units, casitas, or secondary suites.
They are a smart investment for homeowners looking to increase property value, create rental income, or provide housing for family members.
An Accessory Dwelling Unit (ADU) is a small, secondary housing unit built on the same lot as your main home.
ADUs are also known as granny flats, in-law units, casitas, or secondary suites.
They are a smart investment for homeowners looking to increase property value, create rental income, or provide housing for family members.
ADUs are increasingly popular in LA County due to their affordability, flexibility, and ability to meet growing housing needs.
ADUs are increasingly popular in LA County due to their affordability, flexibility, and ability to meet growing housing needs.
Product Showcase
Product Showcase
What our clients say.
Real reviews from happy homeowners.
Vinci Builders made the entire ADU process easy. Permitting, design, and construction were all handled smoothly. Whenever we had questions, their communication was prompt and clear. The finished unit blends seamlessly with our house, and the finish work is outstanding.
Sarah
Los Angeles
We shopped around quite a bit, and Vinci Builders offered the best combination of professionalism, quality, and cost. They turned our ADU idea into reality without headaches. Great communication, reliable timelines, and a finished product that we’re proud of!
Mark
Pasadena
Exceptional service and great value. Vinci Builders helped us with design ideas we hadn’t considered, kept the project on schedule, and didn’t surprise us with extra charges. The ADU is beautifully finished inside and out. Very happy with the outcome!
Linda
Santa Monica
What our clients say.
Real reviews from happy homeowners.
Vinci Builders made the entire ADU process easy. Permitting, design, and construction were all handled smoothly. Whenever we had questions, their communication was prompt and clear. The finished unit blends seamlessly with our house, and the finish work is outstanding.
Sarah
Los Angeles
We shopped around quite a bit, and Vinci Builders offered the best combination of professionalism, quality, and cost. They turned our ADU idea into reality without headaches. Great communication, reliable timelines, and a finished product that we’re proud of!
Mark
Pasadena
Exceptional service and great value. Vinci Builders helped us with design ideas we hadn’t considered, kept the project on schedule, and didn’t surprise us with extra charges. The ADU is beautifully finished inside and out. Very happy with the outcome!
Linda
Santa Monica
What our clients say.
Real reviews from happy homeowners.
Vinci Builders made the entire ADU process easy. Permitting, design, and construction were all handled smoothly. Whenever we had questions, their communication was prompt and clear. The finished unit blends seamlessly with our house, and the finish work is outstanding.
Sarah
Los Angeles
We shopped around quite a bit, and Vinci Builders offered the best combination of professionalism, quality, and cost. They turned our ADU idea into reality without headaches. Great communication, reliable timelines, and a finished product that we’re proud of!
Mark
Pasadena
Exceptional service and great value. Vinci Builders helped us with design ideas we hadn’t considered, kept the project on schedule, and didn’t surprise us with extra charges. The ADU is beautifully finished inside and out. Very happy with the outcome!
Linda
Santa Monica
Ask About Our Referral Program
Bring us leads that converts into an ADU project and receive a finders fee as a thank you.
It's our way of rewarding you for helping others access high-quality ADU construction
Ask About Our Referral Program
Bring us leads that converts into an ADU project and receive a finders fee as a thank you.
It's our way of rewarding you for helping others access high-quality ADU construction
Ask About Our Referral Program
Bring us leads that converts into an ADU project and receive a finders fee as a thank you.
It's our way of rewarding you for helping others access high-quality ADU construction
Frequently Asked Questions
Frequently Asked Questions
What is an ADU, and why should I build one?
An ADU (Accessory Dwelling Unit) is a small, independent living space on your property, such as a backyard cottage, garage conversion, or in-law suite. Building an ADU can increase your property value, create rental income, provide housing for family members, or serve as a home office or guest house.
What types of ADUs do you build?
We build a variety of ADUs, including detached units, attached units, garage conversions, basement conversions, and even custom-designed ADUs. We work with you to choose the right type based on your property, budget, and needs.
Do you handle permits and approvals?
Yes! We take care of all the necessary permits, plans, and city approvals from start to finish so you can enjoy a smooth, stress-free process.
Do you provide free quotes?
Yes, we offer free, no-obligation quotes. Our team will assess your property and provide a detailed estimate tailored to your project.
Where do you build ADUs?
We build ADUs throughout Southern California If you’re not sure if we cover your area, just reach out and we’ll let you know.
How long does it take to build an ADU?
The timeline varies depending on design, permits, and site conditions, but most ADUs take 4-8 months from start to finish. This includes design, permitting, and construction.
Can I customize the design?
Absolutely! We offer a range of pre-designed plans, or we can create a completely custom ADU to match your style, budget, and property layout.
Do you offer a referral program?
Yes, we reward our clients for referrals. If someone you refer builds an ADU with us, you’ll receive a finders fee. Contact us for details.
What is an ADU, and why should I build one?
An ADU (Accessory Dwelling Unit) is a small, independent living space on your property, such as a backyard cottage, garage conversion, or in-law suite. Building an ADU can increase your property value, create rental income, provide housing for family members, or serve as a home office or guest house.
What types of ADUs do you build?
We build a variety of ADUs, including detached units, attached units, garage conversions, basement conversions, and even custom-designed ADUs. We work with you to choose the right type based on your property, budget, and needs.
Do you handle permits and approvals?
Yes! We take care of all the necessary permits, plans, and city approvals from start to finish so you can enjoy a smooth, stress-free process.
Do you provide free quotes?
Yes, we offer free, no-obligation quotes. Our team will assess your property and provide a detailed estimate tailored to your project.
Where do you build ADUs?
We build ADUs throughout Southern California If you’re not sure if we cover your area, just reach out and we’ll let you know.
How long does it take to build an ADU?
The timeline varies depending on design, permits, and site conditions, but most ADUs take 4-8 months from start to finish. This includes design, permitting, and construction.
Can I customize the design?
Absolutely! We offer a range of pre-designed plans, or we can create a completely custom ADU to match your style, budget, and property layout.
Do you offer a referral program?
Yes, we reward our clients for referrals. If someone you refer builds an ADU with us, you’ll receive a finders fee. Contact us for details.