HBC Construction

HBC Construction – ADU Builder and Home Construction Services in the Bay Area

HBC Construction is a family-run construction company based in Fremont, California, founded by Deleon Hill. They specialize in building Accessory Dwelling Units (ADUs), new homes, and home additions across the Bay Area, serving communities including Fremont, Los Altos, Palo Alto, Sunnyvale, Morgan Hill, Woodside, Redwood City, Walnut Creek, and Hayward.

Their work covers the full construction process — from initial consultation and architectural planning through permitting, engineering, and final finishes. As a licensed ADU contractor, HBC Construction handles projects of varying complexity, including detached ADU builds, attached suites, garage conversions, and new home construction from the ground up.

ADU Construction and Garage Conversion Services

As an experienced accessory dwelling unit builder, HBC Construction manages every phase of ADU development. This includes structural work, foundation preparation, framing, plumbing, electrical, HVAC, roofing, and interior finishes. Each ADU is designed to meet California building codes and zoning requirements, including setback and height regulations.

They offer a range of ADU types to suit different property layouts and homeowner goals:

1. Detached ADU – standalone backyard units built as separate structures on the property
2. Attached ADU – units connected to the main home, sharing at least one wall
3. Garage conversion ADU – converting an existing garage into a functional living space
4. In-law suite / granny flat – private living quarters suitable for family members or guests

Garage conversion ADUs have become a popular option in Hayward and surrounding areas due to rising housing demand. Converting an existing garage is generally more cost-effective than building a new detached structure, as the existing foundation and framing can often be retained and adapted. HBC Construction works with homeowners to assess the existing structure and plan a conversion that meets both their budget and local code requirements.

Each ADU project is approached individually. HBC Construction evaluates the specific property — including lot size, soil conditions, existing utilities, and zoning restrictions — before developing a construction plan. Their team has experience working on challenging sites such as hillside lots, sloped yards, limited-access spaces, and older homes with outdated systems.

ADUs built by HBC Construction are equipped with updated electrical service, modern plumbing, proper drainage, energy-efficient insulation, and adequate ventilation. Where older homes have existing infrastructure limitations, these are addressed early in the process to avoid delays and ensure long-term safety and performance.

New Home Construction and Home Additions

Beyond ADU work, HBC Construction also takes on new home construction projects, managing the build from concept through completion. Their process includes design planning, permitting, and full construction management, with the goal of delivering homes that meet California building standards.

For homeowners looking to expand their existing space, HBC Construction offers home addition and remodeling services. These projects are designed to integrate with the existing structure in a way that maintains the overall look and function of the home.

Their general construction process follows a structured approach:

1. Consultation and planning – understanding the homeowner's goals, space requirements, and budget
2. Design and strategy – developing detailed plans, schedules, and cost outlines
3. Construction and completion – managing the full build with attention to quality and code compliance

HBC Construction operates within approximately a 20-mile radius of their Fremont location, serving residential clients throughout the broader Bay Area. Their focus is on delivering reliable, code-compliant construction with clear communication throughout each project stage.