Accessory dwelling unit homes — Fullerton, CA
Last updated: September 24, 2026
What affects the price
Building an ADU involves variables that shift your total investment. The footprint size and complexity of the architectural design are primary factors. Are you planning a detached unit that requires new utility trenching, or is this a garage conversion that uses existing plumbing? Site accessibility, soil conditions, and your choice of finishes—like luxury flooring versus standard options—also play significant roles. Permitting fees vary widely depending on your local municipality and current zoning requirements. Exact pricing confirmed free on the call.
About this service
These are independent living spaces built on the same lot as a primary residence. These homes must be fully self-contained with their own entrance and utilities. Whether you are building a detached studio or a garage conversion, these homes provide flexibility for your family's future. You need this service if you are looking to maximize your property's utility and create a comfortable, private space for others. Exact pricing confirmed free on the call.
Frequently asked in Fullerton
What is a backyard accessory dwelling unit?
What is an affordable accessory dwelling unit?
Can I get an ADU for rent in Fullerton?
What is the accessory dwelling unit construction cost?
Can I get an ADU quote?
What is an ADU unit?
An ADU unit, or accessory dwelling unit, is a secondary housing unit on your property. It's a self-contained living space. In Fullerton, this could be a detached cottage in the backyard, a basement apartment, or a garage conversion. It has its own kitchen, bathroom, and entrance. ADU units are a versatile addition. They can provide rental income or housing for family. We help you find pros to build one.
What is an accessory dwelling unit contractor?
Also serving nearby: Garden Grove · Orange · Norwalk · Anaheim · Westminster
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of Fullerton — population 139,250; about 6,210 residents per square mile across 22.4 sq mi. ZIP codes covered include 92831, 92832, 92833, 92834, 92835, 92836, 92837, 92838.
Neighborhoods served in Fullerton: Downtown Fullerton, Amerige Heights, Sunny Hills, Raymond Hills, Woodruff — and every surrounding area.
Areas we serve
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