Nestadu is a full-service ADU builder offering custom site-built and prefab accessory dwelling units. Prefab models range from $115K–$317K. Custom builds start at $400/sq ft. Financing options include HELOCs, construction loans, and CA grants.
read more
Shed Shop offers ADUs (Accessory Dwelling Units) via their Mini Cottage program. Sizes range from 192 to 480 sq. ft. Services include foundation, plumbing, electrical, permits & more. Available in select cities.
read more
Feldman Construction specializes in custom ADU design and construction across the Bay Area, including San Mateo and Santa Clara County. They build detached ADUs, granny flats, and in-law suites to boost property value and expand living space.
read more
OT Bay Builders is a complete remodeling company with over 40 years of combined experience amongst our team. We’re expert Bay Area ADU builders in San Jose with a customer-first mindset. As a full-service ADU builder, you can trust us to remain by your side from the first consultation to the final walkthrough.
read more
Element Homes is a California ADU contractor offering full-service design, permitting, and construction. They build detached ADUs, garage conversions, and in-law suites across the Bay Area, with in-house teams, warranties, and free estimates.
read more
Mola Construction is a trusted ADU builder in San Jose with 20+ years of experience. They offer custom ADUs, kitchen remodels, home additions, and full remodeling services across the Bay Area, ensuring California code compliance.
read more
California Building and Remodeling offers ADU construction, kitchen & bathroom remodeling, roofing, and concrete services in Albany, CA and the Bay Area. Experienced ADU contractor serving Albany, Berkeley, Richmond & more.
read more
Custom Home is a Bay Area ADU contractor (CSLB #986048) with 160+ projects since 2005. They build detached, attached, junior ADUs & garage conversions across South Bay & Peninsula, with costs from $120K–$500K+.
read more
YAHUA Construction Inc. is a California-based licensed general contractor with 20+ years of experience. Specializing in ADUs, remodeling, MEP, roofing, and more, they serve the Bay Area with quality, sustainable construction.
read more
Valley Home Builders Inc. is a Silicon Valley design-build contractor serving Santa Clara & San Mateo Counties. Founded in 2005, they specialize in kitchen remodeling, ADU construction, and home renovations across San Jose, San Mateo & beyond.
read more
At Smith and Son Construction, they specialize in designing and building high-quality ADUs in San Leandro, CA. Whether you envision a private guest house, a rental unit, or a home office, they deliver innovative designs, expert craftsmanship, and a stress-free construction experience.
read more
Type Five is a Berkeley, CA-based ADU builder offering custom backyard cottages, granny flats & in-law suites. They combine modular design, transparent pricing & streamlined construction for stress-free, high-quality detached ADUs built to last.
read more
DeBrus Construction LLC is a San Francisco general contractor specializing in seismic retrofits, foundation repair, ADU construction, and home remodeling. Led by Malcolm DeBrus, the company handles mandatory soft story retrofits, garage conversions, and full remodels with transparent pricing.
read more
HDR Remodeling is a Bay Area Design Build firm since 1987, specializing in kitchen remodels, bathroom renovations, and home improvements across Oakland, Berkeley, Alameda, and the East Bay, backed by an experienced team of architects and designers.
read moreAlameda, California is a unique island city situated in the San Francisco Bay, connected to the mainland by tunnels and bridges. This distinctive geography creates specific considerations for ADU contractors in Alameda. The city sits in a liquefaction and seismic hazard zone, meaning that accessory dwelling unit construction must meet strict foundation and structural requirements. Experienced Alameda ADU contractors understand that soil conditions on the island often require additional geotechnical assessments before breaking ground, adding an important layer of planning to every project.
The City of Alameda follows California state ADU law while also maintaining its own local guidelines. Alameda has a strong commitment to historic preservation, as many of its neighborhoods feature Victorian and Craftsman-era homes. ADU builders in Alameda must often navigate the city's Design Review process to ensure that new accessory dwelling units are compatible with the architectural character of existing structures. Key regulations include:
Working with a licensed ADU contractor familiar with Alameda is essential for a smooth permitting and construction process. Local contractors understand the nuances of working with the City of Alameda's Building and Planning Departments, which can help reduce delays and costly revisions. They are also well-versed in the city's utility infrastructure, including the specific requirements for connecting to Alameda Municipal Power (AMP), the city's publicly owned electric utility — a detail that can affect project timelines and costs.
Given Alameda's older housing stock and lot sizes, the most popular ADU types built by Alameda ADU contractors include:
Whether you're looking to add rental income, house extended family, or increase your property value, building an ADU in Alameda is a smart investment. Partnering with an experienced ADU contractor in Alameda, CA ensures your project meets all local codes, respects the city's historic character, and is completed efficiently. Contact a qualified local ADU specialist today to get started with a site evaluation and design consultation.