An ADU Built Around Your Whittier Property
An ADU starts with understanding the space you have and how you want to use it. You may be considering a detached backyard home, an attached unit, or converting an existing garage. XactBuilt helps Whittier homeowners explore those options and develop a project scope around their property, budget, and intended use.
For family living, the priorities may include privacy, convenient access, and a comfortable layout. For an ADU intended for rental use, you may want to discuss a separate entrance, storage, and how the unit will function alongside your main home. Those decisions help shape the design before construction begins.
Garage conversions require a closer look at the existing structure and the improvements needed to create living space. Layout, plumbing, electrical service, insulation, and access all deserve attention during planning. We coordinate the design, plans, permit process, and construction so those details are considered together.
Whittier also offers preapproved plans for certain single-story detached ADUs. These may be worth comparing with a custom design, depending on your property and preferences. Preapproved plans still require site-specific documents, review, and permits; they do not mean every property is automatically approved.
Led by Sergio Murillo, XactBuilt Construction Inc. is based in Whittier and also provides home additions, kitchen and bathroom remodeling, whole-home renovations, and custom home construction. If you’re weighing an ADU against expanding your existing home, tell us what you want the additional space to accomplish.
You don’t need completed plans to contact us. Share your property location and project idea, and we’ll help you identify the next steps.








XactBuilt provides ADU construction, garage conversions, room additions, kitchen and bathroom remodeling, whole-home renovations, custom home construction, and metal building construction. We manage projects from initial design and plans through permitting and construction.
Yes. Our design-build service includes coordinating the design, project plans, permitting process, and construction. You have one company managing the process from your first ideas through project completion.
No. You can contact us with an idea, inspiration photos, or a general description of what you want to build or remodel. We’ll discuss your goals, property, and next steps, including the design and plans needed for your project.
A garage conversion may be an option for creating a separate living space with a kitchen and bathroom. Feasibility depends on the existing structure, utility connections, property conditions, and applicable requirements. XactBuilt can help you explore the design, permitting, and construction involved.
An accessory dwelling unit, or ADU, provides independent living facilities, including cooking and bathroom facilities. A room addition expands your existing home, such as adding a bedroom or enlarging a living area. The right choice depends on how you want to use the space and what your property can accommodate.
Pricing depends on the project’s size, existing conditions, design, materials, utility needs, and construction scope. A garage conversion, new detached ADU, and kitchen remodel each involve different work. Share your project details with XactBuilt so we can discuss your goals and prepare an estimate based on your scope.
The timeline depends on design decisions, plan preparation, permit review, material availability, and the amount of construction involved. XactBuilt will discuss the anticipated stages and schedule for your project, including the planning and permitting work needed before construction begins.
Yes. XactBuilt is based in Whittier and serves homeowners in Pasadena, Orange County, and surrounding communities. Include your property’s city when requesting an estimate so we can confirm service availability and discuss your project.
- Whittier
- La Habra
- La Mirada
- Hacienda Heights
- Pico Rivera
- Rowland Heights
- Brea
- Fullerton
- Yorba Linda
- Placentia
- Anaheim
- Pasadena
- Arcadia
- Orange
- Tustin
- Irvine
- Huntington Beach
- Newport Beach
- ADU Construction
- Garage Conversions
- Room Additions
- Kitchen Remodeling
- Bathroom Remodeling
- Whole-Home Remodeling
- Custom Home Construction
- Metal Building Construction
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