prefabADU

prefabADU is a California-based ADU construction and factory-built housing company headquartered in Fairfield. The company specializes in custom accessory dwelling units, modular homes, manufactured homes, and panelized building systems.

Its history began with investment-property development and ADU construction. Following the 2008 housing market crash, the company shifted its focus toward helping homeowners create additional living spaces and addressing affordable housing needs. It now offers multiple construction methods, combining factory-built technology with site-specific design and construction.

ADU Services

prefabADU provides a range of ADU solutions, from standard floor plans to fully customized projects.

• Detached ADUs: Independent backyard homes for family accommodation, rental income, and additional living space.

• Custom ADU Design: Developing personalized floor plans based on homeowner requirements and property conditions.

• Standard ADU Plans: Offering pre-designed layouts to reduce design time and simplify project planning.

• Modular ADUs: Factory-built residential units assembled off-site and installed on permanent foundations.

• Manufactured ADUs: Complete residential units constructed in a factory and transported to the property.

• Panelized ADU Kits: Pre-engineered wall and structural panel packages delivered to the site for assembly.

• Site Assessment: Evaluating property conditions, access, and construction requirements.

• Permitting Assistance: Preparing construction documentation and helping homeowners submit plans for city or county approval.

• Construction and Installation: Coordinating the building process according to the selected construction method.

• Custom Finishes: Offering choices in flooring, lighting, cabinetry, exterior facades, and other interior and exterior details.

The company advertises ADU options ranging from compact 150-square-foot studios to larger units and duplex configurations.

Prefabricated ADU Models

One of prefabADU’s main advantages is its selection of standard plans and different factory-built construction methods.

Some of its published models include:

The company identifies several models as panelized kits, while larger models have panelized and manufactured-home options.

Other Construction Services

In addition to ADUs, prefabADU offers:

• Custom single-family homes

• Custom multifamily homes

• Modular residential construction

• Manufactured housing

• Panelized framing systems

• Factory-built housing solutions

• Residential design and construction planning

The company emphasizes that factory construction is a building method rather than a fixed architectural style, allowing homeowners to pursue different designs and finishes.