Barbour Construction LLC provides expert ADU construction services in California, helping homeowners maximize their property with high-quality Accessory Dwelling Units. Whether you’re building a backyard unit, in-law suite, or rental space, we deliver fully customized ADU solutions designed for comfort, functionality, and long-term value.
As a trusted Bay Area builder and experienced home renovation contractor, we also specialize in custom luxury homes builders, home remodeling, and home additions, managing the entire process—from design and permits to construction and final completion.
An Accessory Dwelling Unit (ADU) is a smart investment that adds usable space and increases property value. Whether you need additional living space for family or a rental unit for extra income, our ADU construction services are tailored to your specific goals.
We focus on efficient layouts, modern designs, and high-quality construction to ensure your ADU meets all California regulations and integrates seamlessly with your existing home.
Adding an ADU is one of the most effective ways to increase property value and functionality. Whether for rental income, guest housing, or additional living space, Barbour Construction LLC delivers ADUs that are modern, efficient, and built to last—making us one of the best construction companies homeowners trust.
We offer a variety of ADU solutions to fit your property and needs:
Standalone units built separately from your main home, ideal for privacy and rental opportunities.
Connected extensions that integrate with your existing home structure, similar to Home Addition Services
Convert your existing garage into a fully functional living space with smart design and efficient layouts.
Comfortable and private spaces designed for extended family living with modern amenities.
We follow a streamlined process to ensure efficiency and quality:
Have questions about your project? Here are some common questions we receive from homeowners.
An ADU (Accessory Dwelling Unit) is a secondary housing unit on your property. It can be used for rental income, guest accommodation, or family living while increasing property value
Costs vary based on size, design, and site conditions. We provide detailed estimates tailored to your project and budget.
Yes, we manage all permits, approvals, and ensure compliance with California ADU regulations.
Most ADU projects take several months depending on complexity, design, and permitting timelines.
A family-owned Bay Area general contractor delivering exceptional craftsmanship, clear communication, and lasting results on every project.
