Accessory Dwelling Unit Construction
Create more possibilities for your property with a custom-built Accessory Dwelling Unit designed around your family's needs, investment goals, and future plans.
Expand What's Possible on Your Property
An Accessory Dwelling Unit (ADU) is more than an additional structure. It's an opportunity to create rental income, accommodate family members, add a private guest house, or build a flexible space that grows with your changing lifestyle.
At
CoreFrame Builders, we help homeowners maximize their property's potential through thoughtfully planned ADU construction. From the initial consultation to project completion, we provide expert guidance, organized project management, and quality craftsmanship to make the building process as straightforward and rewarding as possible.
Custom ADUs Built Around Your Goals
No two homeowners have the same vision, which is why every ADU we build is tailored to your property and long-term objectives. Whether you're planning for additional income, multigenerational living, or a dedicated workspace, we create solutions that balance functionality, comfort, and lasting value.
Our team works closely with you throughout the planning and construction process to ensure your ADU complements your existing home while meeting local building requirements and your personal goals.
Our ADU Construction Services
We provide comprehensive ADU construction solutions designed to simplify every stage of your project.
Detached ADUs
Create a private, stand-alone living space that offers flexibility for rental opportunities, family members, or guests while maintaining separation from the primary residence.
Attached ADUs
Expand your existing home with an attached ADU that provides independent living space while remaining seamlessly connected to the main structure.
Garage Conversions
Transform an underutilized garage into a comfortable and functional living space without expanding your home's existing footprint.
Custom ADU Design & Build
Every property is different. We work with homeowners to create custom ADUs that reflect their goals while maximizing available space, functionality, and long-term value.
Why Homeowners Invest in ADUs
An ADU is one of the most versatile improvements you can make to your property. Beyond creating additional living space, it offers practical benefits that continue to provide value long after construction is complete.
Homeowners often choose to build an ADU to:
- Generate long-term rental income.
- Create housing for aging parents or adult children.
- Increase overall property value.
- Add a private guest house.
- Build a dedicated home office or creative workspace.
- Make better use of available property space.
Whether your goals are financial, personal, or both, an ADU provides flexibility that can adapt as your family's needs change.
FROM VISION TO REALITY
Our ADU Construction Process
Building an ADU should feel exciting, not overwhelming. Our organized approach helps homeowners move through each stage with confidence and clarity.
01
Consultation & Project Planning
We begin by learning about your goals, evaluating your property, and discussing the best approach for your ADU project.
02
Design & Permitting
Our team helps guide the planning process while coordinating the necessary steps to prepare your project for construction.
03
Construction
Once construction begins, we carefully manage scheduling, coordination, and quality control while keeping you informed throughout the project.
04
Final Walkthrough
Before completion, we review every detail to ensure your new ADU meets our standards for craftsmanship and your expectations for quality.
Why Choose CoreFrame Builders for Your ADU?
Choosing the right builder can make all the difference in your construction experience. We combine technical expertise with personalized service to help homeowners build with confidence.
When you partner with CoreFrame Builders, you benefit from:
- Civil engineering and architectural expertise.
- Commercial-level project management.
- Honest recommendations and transparent communication.
- Detailed planning and organized construction.
- Quality craftsmanship built to last.
- A team committed to protecting your investment.
Our goal is to make your ADU project as seamless as the finished space itself.
OUR SERVICES
Residential Construction Services
In addition to ADU construction, CoreFrame Builders offers complete residential construction solutions for homeowners throughout Southern California.
Home Additions
Expand your living space with thoughtfully designed additions that blend seamlessly with your existing home.
Whole Home Remodeling
Reimagine your home with renovations that improve comfort, functionality, and long-term value.
Custom Home Construction
Build a one-of-a-kind home tailored to your family's lifestyle and future goals.
Supporting Construction Services
Our experienced team self-performs key phases of construction to maintain exceptional quality and consistency.
OUR RECENT WORK
Featured Projects
Every project reflects our commitment to thoughtful planning, quality craftsmanship, and creating spaces that improve everyday living.
Fifth Street ADU Conversion
A home addition and garage-to-ADU conversion designed to create approximately 750 square feet of additional living space while increasing long-term rental income potential.
Sixth Street ADU Project
A residential expansion featuring a home addition, detached ADU, and attached garage built to maximize living space, functionality, and long-term property value.
LaRue Home Addition Project
A garage conversion and custom home addition completed to support multigenerational living with thoughtfully designed spaces and seamless interior upgrades.
Villa Park Valley Whole Home Remodel
A complete renovation of a luxury estate featuring a full interior remodel, redesigned outdoor living spaces, an expanded pool, and custom home theater.
Villa Park Windsor Whole Home Remodel
A full-scale home reconstruction that expanded an existing residence with luxury living spaces, a detached theater, resort-style outdoor amenities, and premium finishes.
HOA Pool & Spa Renovation
A commercial HOA renovation featuring a 30,000-gallon pool, 5,000-gallon spa, reconstructed concrete decking, new finishes, and restored wrought iron fencing.
Cypress Whole Home Remodel
A complete 2,900-square-foot home renovation featuring six bedrooms, four bathrooms, a modern interior redesign, and a reconstructed front entry for improved flow.
TESTIMONIALS
What Homeowners Are Saying
★ ★ ★ ★ ★
Andrea C. – Covina, CA
"We had Brilliant and his crew remodel our house. It was a huge undertaking, and they did an amazing job. No complaints here! We would highly recommend them. Thank you so much, Brilliant!"
★ ★ ★ ★ ★
Joseph G. – Glendora, CA
"We recently hired CoreFrame Builders for a major remodel that included our kitchen, bathrooms, and the removal of a load-bearing wall. From start to finish, they were professional, organized, and communicative. The quality of their work exceeded our expectations, they completed the project on schedule, and stayed within the agreed budget—something that's hard to find with remodeling projects. We couldn't be happier with the results and would highly recommend CoreFrame Builders to anyone looking for a reliable and skilled contractor."
★ ★ ★ ★ ★
Robert L. – San Francisco, CA
"Great job from start to finish. The team was transparent, informative, and paid close attention to every detail. I was pleasantly surprised by how quickly the project was completed, and I'm grateful to CoreFrame Builders for turning our vision into reality."
★ ★ ★ ★ ★
Catherine P. – Ontario, CA
"I've had the pleasure of working with Brilliant Tran and CoreFrame Builders as one of my trusted general contractors, and it's always a great experience. Their professionalism, courtesy, and commitment to exceptional service and quality workmanship have made every project enjoyable. I highly recommend CoreFrame Builders to anyone looking for a contractor they can trust."
★ ★ ★ ★ ★
Gerald S. – Pasadena, CA
"I worked with Brilliant Tran after my roof began leaking, and the entire experience was outstanding. The project was handled professionally from beginning to end, and I wouldn't hesitate to work with CoreFrame Builders again. Highly recommended!"
★ ★ ★ ★ ★
Jesus L. – San Dimas, CA
"CoreFrame Builders is a professional, licensed contractor specializing in residential construction. From home additions and ADUs to new home construction and repairs, their team pays close attention to detail and consistently delivers quality craftsmanship throughout every stage of the project."
★ ★ ★ ★ ★
Andrea C. – Covina, CA
"We had Brilliant and his crew remodel our house. It was a huge undertaking, and they did an amazing job. No complaints here! We would highly recommend them. Thank you so much, Brilliant!"
★ ★ ★ ★ ★
Joseph G. – Glendora, CA
"We recently hired CoreFrame Builders for a major remodel that included our kitchen, bathrooms, and the removal of a load-bearing wall. From start to finish, they were professional, organized, and communicative. The quality of their work exceeded our expectations, they completed the project on schedule, and stayed within the agreed budget—something that's hard to find with remodeling projects. We couldn't be happier with the results and would highly recommend CoreFrame Builders to anyone looking for a reliable and skilled contractor."
Frequently Asked Questions
What is an Accessory Dwelling Unit (ADU)?
An ADU is a secondary residential living space located on the same property as a primary home. It can be used for rental income, multigenerational living, guest accommodations, or a private workspace. ADUs provide homeowners with flexible living options while increasing property value.
Is an ADU a good investment?
For many homeowners, an ADU offers long-term financial and lifestyle benefits. It can generate rental income, provide housing for family members, and increase the overall value of your property. We'll help you determine whether an ADU aligns with your goals.
Can you help with permits and approvals?
Yes. We help homeowners understand the planning and permitting process before construction begins. Our team guides you through the necessary steps to help keep your project moving forward.
How long does an ADU project take?
Every ADU project is different depending on design, permitting, and construction requirements. During your consultation, we'll discuss a realistic timeline based on your project's scope. Throughout construction, we'll keep you updated on progress.
What types of ADUs do you build?
We build detached ADUs, attached ADUs, garage conversions, and fully customized accessory dwelling units. Every project is designed around the homeowner's property, goals, and long-term needs.
Can an ADU be used as a rental property?
Yes. Many homeowners build ADUs to create an additional source of rental income. Local regulations may vary, so we'll help you understand the opportunities available for your property.
Will my ADU match the style of my home?
Absolutely. We design and build ADUs that complement your existing home's architecture, finishes, and overall appearance. Our goal is to create a seamless addition to your property.
Can I customize the layout of my ADU?
Yes. Every ADU is customized to fit your property's layout, lifestyle needs, and long-term goals. We'll work with you to create a design that maximizes both functionality and comfort.
Why should I choose CoreFrame Builders for my ADU project?
Our background in engineering, architecture, and commercial construction allows us to deliver organized project management and exceptional craftsmanship. We focus on transparent communication, quality workmanship, and creating a positive building experience from beginning to end.
How do I get started?
The first step is scheduling a consultation with our team. We'll discuss your project, answer your questions, and help you determine the best approach for your new ADU.
GET IN TOUCH WITH US
Ready to Build Your ADU?
Whether you're creating rental income, expanding your living space, or planning for your family's future, CoreFrame Builders is here to help you build with confidence.
Let's create an Accessory Dwelling Unit that's thoughtfully designed, expertly built, and made to serve your needs for years to come.
