A1 Building Contractors LLC

Detached Homes

From modern studios to multi-room guest houses, our team works with you to maximize space and functionality...

Custom Homes

When it comes to building your dream home, every detail matters. Our process starts with your vision...

Attached Homes

Looking to add a guest house? Rental unit? Or another type of space? A1 Building Contractors has you covered...

ADU Builder & Custom Homes in Sacramento

Serving all of Placer, Sacramento, & El Dorado Counties in California

A1 Building Contractors is passionate about turning your dream home into a reality. With over 20 years of experience in the industry and a proven track record, weโ€™ve built a reputation for delivering homes that combine innovative design, exceptional craftsmanship, and unmatched client care. Whether youโ€™re looking for a one-of-a-kind custom home or the convenience of a predesigned option, we do it all.

Custom Homes Designed Around Your Vision

When it comes to building your dream home, every detail matters. We specialize in making custom homes that are as unique as the people who live in them. Our process starts with your vision. We take the time to understand your lifestyle, needs, and preferences, then work closely with you to design a home that reflects your personality and enhances your way of life.

With our in-depth knowledge of Sacramentoโ€™s local building regulations and efficient permitting processes, we make sure that your custom home is not only beautiful but also built to last. Using sustainable materials and energy-efficient systems, we prioritize quality, functionality, and environmental responsibility.

Streamlined Predesigned Home Options

If youโ€™re seeking a faster, more streamlined path to homeownership, our predesigned homes are the perfect solution. These plans are ready to go, which means we can expedite the permitting process and begin construction sooner, saving you time and hassle.

Our predesigned homes are ideal for those who want high-quality construction with a simplified design process. And while these homes are preplanned, we still offer opportunities for customization to ensure your home feels personal and unique. From choosing finishes to modifying layouts, weโ€™ll work with you to make your predesigned home truly yours.

Why Choose
A1 Building Contractors?

Our Expertise

Our team has extensive experience in ADU design and construction, ensuring a smooth and efficient process.

Personalized Service

We tailor our services to meet your unique needs and preferences.

Quality & Transparency

We use the highest-quality materials and maintain open communication throughout the project.

If you have any questions or need further information about the ADU construction process, please donโ€™t hesitate to reach out. Weโ€™re here to make your ADU journey as seamless and enjoyable as possible.

Letโ€™s Build Your Dream Home

Whether youโ€™re envisioning a fully customized home or love the idea of a predesigned plan, A1 Building Contractors is here to make it happen. With our end-to-end project solutions, local expertise, and commitment to sustainable practices, we deliver homes that exceed expectations.

Get a Quick Quote Estimate

Contact us today to learn more about our custom homes or explore our predesigned plans.

Frequently Asked Questions

We hope these FAQs clarify some of your questions about building an ADU. If you have any additional questions or need further information, please donโ€™t hesitate to contact us. Weโ€™re here to assist you every step of the way.

What is an ADU?

An Accessory Dwelling Unit (ADU) is a secondary housing unit on a single-family residential lot. It can be attached or detached from the main home and is fully equipped with its kitchen, bathroom, and living space.

What are the benefits of building an ADU?

ADUs offer numerous benefits, including:

  • Additional rental income
  • Increased property value
  • Extra living space for family or guests
  • Greater flexibility and use of your property
How long does it take to build an ADU?

The timeline for building an ADU can vary based on factors such as design complexity, permitting, and construction. On average, the process can take 6-12 months from initial consultation to completion.

Do I need a permit to build an ADU?

Yes, you will need to obtain permits from your local building department. A1 Building Contractors handles all aspects of the permitting process to ensure your ADU meets all local zoning and building regulations.

How much does it cost to build an ADU?

The cost of building an ADU can vary depending on size, design, and finishes. We provide a detailed estimate, outlining all potential costs to give you a clear understanding of the investment required.

Can you help with financing options?

Absolutely! We offer information about various financing options, including no-money-down plans, to help make your ADU project more affordable. Our team can guide you through the available options and assist with finding the best solution for your needs.

What types of ADUs can you build?

We specialize in designing and building custom ADUs that suit your specific needs. This includes detached units, attached units, garage conversions, and basement conversions, all tailored to your preferences and property layout.

How do I get started?

Getting started is easy! Simply contact us to schedule your Free Property Analysis & Estimate. One of our ADU experts will visit your property, discuss your vision, and provide a detailed estimate.

What Our Customers Have to Say

Step-by-Step Guide to Building Your ADU

1 Initial Consultation & Property Analysis

Construction worker in a safety vest and helmet holds blueprints, facing an unfinished two-story house.
  • We begin with a thorough assessment of your property to determine its suitability for an ADU.
  • Our team will discuss your specific needs, preferences, and budget to create a personalized plan.

2 Design & Planning

  • Our experienced designers will collaborate with you to develop a custom ADU design that aligns with your vision and meets local regulations.
  • We provide detailed architectural plans and 3D renderings to help you visualize the final product.
Group of people reviewing architectural plans on a wooden table with a model house, coffee cup, tablet, and hard hat.

3 Permitting & Approvals

Two people at a table with a house model, discussing a contract. A calculator, pen, and coffee cup are present.
  • We handle all the paperwork and submissions required for permits, ensuring compliance with zoning laws and building codes.

4 Construction

  • Once permits are approved, our skilled construction team will build your ADU using high-quality materials and proven techniques.
  • We keep you informed with regular updates and walkthroughs to ensure the project stays on schedule.
A construction worker in a hard hat reviews blueprints at a site, with a partially built wooden structure in the background.

5 Final Inspection and Handover

A construction worker wearing a hard hat and safety glasses writes on a clipboard inside a building with wooden walls.
  • After construction, we conduct a final inspection to ensure everything meets our high standards and local regulations.
  • Weโ€™ll walk you through your new ADU, address any questions, and ensure your complete satisfaction.

6 Move-In and Enjoy

  • Your ADU is ready for use! Whether for family, guests, or rental income, enjoy the added space and value to your property.
Two people painting a wall with rollers in a well-lit room, broom visible in the foreground.

Our ADU Models Catalog!

Top models & designs for 2025.

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A1 Building Contractors LLC