ADU Contractors You Can Trust!

Transform your property with A & S Construction Inc, the trusted name for ADU construction in Los Angeles and surrounding areas. With over 28 years of experience and more than 3,000 projects completed, we specialize in creating high-quality accessory dwelling units (ADUs) tailored to your needs. From garage conversions to detached ADUs and custom designs, we handle every aspect—from design and permits to construction—ensuring your project is completed on time and within budget.

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Types of ADUs

WHAT IS A Detached ADU?

A Detached ADU (Accessory Dwelling Unit) is a standalone housing structure separate from the main home, providing private living space with its own kitchen, bathroom, and entrance. Ideal for guest houses, rental income, or multi-generational living, Detached ADUs add value to your property while enhancing its functionality.

WHAT IS A Attached ADU?

An Attached ADU is connected to your existing home, offering additional living space without requiring a separate structure. With its own entrance and utilities, it’s perfect for aging parents, renters, or an office. These ADUs seamlessly blend with your home’s architecture while maximizing your property’s potential.

WHAT IS A Garage Conversion ADU?

A Garage Conversion ADU transforms your underutilized garage into a fully functional living space. Whether it’s a studio apartment, guest suite, or office, this option is budget-friendly, eco-conscious, and adds immense value to your property.

WHAT IS A Junior ADU?

A Junior ADU (JADU) is a small, self-contained unit within your existing home or garage, typically under 500 square feet. Featuring a kitchenette and separate entrance, JADUs are cost-effective solutions for homeowners looking to create flexible living arrangements.

WHAT IS A Above-Garage ADU?

An Above-Garage ADU utilizes the unused space above your garage to create a beautiful, efficient living unit. With a private entrance and utilities, it’s perfect for renters or extended family while preserving your property’s footprint.

WHAT IS A Interior Conversion ADU?

An Interior Conversion ADU repurposes existing space within your home, such as a basement or attic, into a self-contained living unit. It’s a cost-effective and efficient way to maximize your home’s potential for rental income or additional family living quarters.

WHAT IS A Two-Story ADU?

A Two-Story ADU is a multi-level structure that maximizes vertical space to create a fully functional dwelling unit. Perfect for smaller lots, it offers ample living space with modern design features, making it ideal for families or rental income.

WHAT IS A Custom ADU?

A Custom ADU is a personalized dwelling unit designed to meet your unique needs and style. Whether it’s modern, rustic, or eco-friendly, custom ADUs allow for complete flexibility in design, layout, and finishes to match your vision.

Our Process For Your ADU Project:

STEP 1

Initial Consultation

Our ADU specialists begin with a comprehensive site evaluation and consultation. We’ll discuss your property’s potential, your vision for the ADU, and explore design possibilities that maximize your space and investment. During this meeting, we’ll review zoning requirements, budget considerations, and timeline expectations to ensure a clear understanding of your project goals.

STEP 2

Design and Planning​

Our expert team develops detailed architectural plans and 3D renderings of your ADU project. We handle all necessary documentation, including permit applications, city submissions, and engineering requirements. Our designers work closely with you to perfect every detail, from layout optimization to material selection, ensuring your ADU meets both aesthetic and functional needs.

STEP 3

Construction​

With approved plans in hand, our skilled construction team brings your ADU to life. Our project managers oversee every phase of construction, maintaining strict quality control and regular communication throughout the build. From foundation to finishing touches, we ensure your ADU is built to the highest standards, on time and within budget, while minimizing disruption to your property.

Working With Us

ADU Construction

From concept to completion, we handle every aspect of your ADU project with expert precision.

Design & Planning

Experience seamless project development with our detailed 3D renderings and professional blueprints.

Permits & Compliance

We handle all city requirements, zoning laws, and building codes to ensure a smooth approval process.

Full-Service Turnkey Build

From foundation to finishing touches, our skilled team delivers quality craftsmanship at every step.

ADU Portfolio

Explore our portfolio of stunning transformations and exceptional craftsmanship!

ADU Projects

What is an ADU (Accessory Dwelling Unit)?

An ADU is a secondary housing unit located on the same lot as a primary residence. It can be detached, attached, or a converted space, like a garage. ADUs are ideal for additional living spaces, rental income, or multi-generational housing.

We specialize in detached ADUs, garage conversions, attached ADUs, above-garage units, and interior conversions, all customized to meet your unique needs.

From design to completion, most ADUs take 6-12 months. This includes permitting, design, and construction.

Yes, we offer comprehensive design services, including 3D renderings, to help you visualize your ADU before construction begins.

Absolutely. We take care of all permits, zoning checks, and compliance with local building codes to ensure a hassle-free process for you.

We use high-quality, durable materials tailored to your budget and design preferences, ensuring a long-lasting and visually stunning ADU.

Happy Customers, Happy World

A

Angela M

2025-01-18

Beautiful work. Completed early. Dean (Design Consultant) and Alina (Project Manager) made sure we were happy with each phase and item of work. Even if I was fussy about minor things, there were no complaints from any of the PHB crew.

E

Elva Madrigal

2025-01-07

Updated review: My hubby and I have been enjoying our finished project and we couldn’t be happier with Preffered Home Builders. They did such an incredible job, it’s amazing to be living in a space that did not exist a few months ago. Tamir helped walk us through the design and we’re glad we followed it because we’re so happy with the greater privacy and use of the space. The experience of PHB really comes through, and as someone who has never done any house work or owned a house, I was reassured of their professionalism and recommendations. Their customer customer service was fantastic. We had tons of questions and our concerns were always addressed throughout the whole process. Talia was our project manager and she was always accessible as well as the rest of the crew. When bumps came up, PHB was always so professional and it was reassuring since the home-building world was so foreign to us. My husband and I learned a ton, we are so happy with our finished project, and we’re excited to put in more TLC to our home with Preffered Home Builders.

———

In the process of vetting contractors for an extension project in my home, Preffered Home Builders stands out! Paul in the office has been helpful and open. Tamir who has helped us work out more details is a stand up guy, so professional and knowledgeable! I appreciated the attention to details and his vast experience. He took us to a work site and it was reassuring to see a similar project we had in mind. Tamir also washed out our AC unit (which was totally gross!) when it went bust and he didn’t have too! Super nice, and the pride and confidence in his work is reassuring. As my family is finalizing what we can afford and who we will be working with, I’ve appreciated Preffered Home Builders.

C

Christina Moore

2024-12-29

I'm so happy with our kitchen remodel and the work performed by Preferred Home Builders. We only wanted to add a dishwasher to our small kitchen and all other companies said it wasn't possible. The designer, Rene, brought in multiple foremen to try and give us what we wanted. After pricing it all out and bringing in the owner (Tamir), it made more sense to do a full remodel. Sure, the other companies said that from the get-go, but in working with Preferred, I felt confident that they were on my side and truly wanted me to have the kitchen I wanted.

Tamir was phenomenal in walking me through what we could do within our budget. He has a passion for his work and we knew we were in good hands. They quoted us 3 weeks for our project while other companies quoted 2 months! Not only that... but they got the job done in TWO WEEKS. With a curious one-year-old at home, we were over the moon to have a beautiful working kitchen so quickly.

The workers were skilled and kind. Our foreman, Sam, kept the train moving and we are so happy with the results. There were some hiccups with the inspection processes, but our project manager, Jadi was excellent from start to finish. She communicated each situation clearly and honestly. She was always available by text and we felt like we had a friend throughout the entire process. I'll definitely be calling Preferred again for our next project.

E

Elva Madrigal

2025-01-07

Updated review: My hubby and I have been enjoying our finished project and we couldn’t be happier with Preffered Home Builders. They did such an incredible job, it’s amazing to be living in a space that did not exist a few months ago. Tamir helped walk us through the design and we’re glad we followed it because we’re so happy with the greater privacy and use of the space. The experience of PHB really comes through, and as someone who has never done any house work or owned a house, I was reassured of their professionalism and recommendations. Their customer customer service was fantastic. We had tons of questions and our concerns were always addressed throughout the whole process. Talia was our project manager and she was always accessible as well as the rest of the crew. When bumps came up, PHB was always so professional and it was reassuring since the home-building world was so foreign to us. My husband and I learned a ton, we are so happy with our finished project, and we’re excited to put in more TLC to our home with Preffered Home Builders.

———

In the process of vetting contractors for an extension project in my home, Preffered Home Builders stands out! Paul in the office has been helpful and open. Tamir who has helped us work out more details is a stand up guy, so professional and knowledgeable! I appreciated the attention to details and his vast experience. He took us to a work site and it was reassuring to see a similar project we had in mind. Tamir also washed out our AC unit (which was totally gross!) when it went bust and he didn’t have too! Super nice, and the pride and confidence in his work is reassuring. As my family is finalizing what we can afford and who we will be working with, I’ve appreciated Preffered Home Builders.

Get a Free Quote Today

Fill out the form to get a Free In-Home Design Session

Get a Free Home Build Estimate Today

Fill out the form to get a free in-home Design Session