Affordable Accessory Dwelling Unit Builders in San Diego, California
West Coast Building and Design is a San Diego-based company specializing in affordable accessory dwelling units (ADUs) and custom home construction. Since California updated its ADU laws in 2016 in favor of homeowners, this experienced team has been helping property owners capitalize on those changes — adding real value to their investments through quality construction and strategic planning.
The company was founded by two construction professionals who previously worked together at a premier design and build firm in San Diego. One served as Production Manager, the other as Design Sales Consultant. Together, they recognized an opportunity to deliver superior customer satisfaction, more competitive pricing, and top-quality results. Their combined expertise spans over 30 years of building more than 350 additions, dozens of custom homes, and multi-family projects throughout San Diego. Their backgrounds include Real Estate Land Development, Project Management, and Business Management — credentials that directly benefit every client they serve.
As a trusted ADU contractor and accessory dwelling unit builder, they provide a comprehensive range of services including design, planning, materials selection, installation, and complete project management. Their highest priority is completing projects on time and within budget while accurately incorporating each client's vision.
What Makes ADUs a Smart Investment
ADUs — also known as granny flats, in-law suites, backyard cottages, or secondary units — are one of the most cost-effective housing solutions available in San Diego. Because they don't require purchasing new land, major infrastructure upgrades, structured parking, or elevators, they are significantly more affordable to build than units in new multifamily developments.
As a dedicated granny flat builder and in-law suite builder, West Coast Building and Design understands the many benefits these structures offer:
- They can generate rental income for homeowners
- They allow extended families to live near one another while maintaining privacy
- They provide flexible living space suited for couples, small families, young people, and seniors
- They support aging in place by enabling seniors to receive care while remaining close to family
- They are built with cost-effective wood frame construction
A Process Built on Planning, Communication, and Quality
As both a detached ADU builder and attached ADU contractor, West Coast Building and Design approaches every project with a structured, three-step process: thorough planning, clear communication, and consistent evaluation during construction. They regularly collect client feedback throughout the planning phase and maintain open communication with their teams and subcontractors at every stage.
Their attached ADU services in San Diego are designed to blend seamlessly with existing homes. Every project receives personalized design attention, end-to-end project management, and quality materials paired with skilled craftsmanship. The result is a living space that is both functional and built to last.
Green building practices are also incorporated wherever possible, reflecting their commitment to responsible construction. Safety is taken seriously, with full compliance to OSHA standards and regulations. With their leadership team collectively holding over 90 years of construction experience, and a trusted network of skilled subcontractors, West Coast Building and Design consistently delivers results that meet the highest standards of quality and client satisfaction.
For homeowners in San Diego looking for a reliable backyard cottage builder or experienced ADU builder, West Coast Building and Design offers the expertise, transparency, and craftsmanship needed to turn ideas into reality.
