ADU BUILDERS

ADCON Construction & Engineering is a trusted San Francisco ADU builder, recognized for delivering high-quality accessory dwelling units that enhance both property value and functionality. Over years of experience, we have refined our design coordination, engineering, and construction processes to produce ADUs that meet local zoning requirements, building codes, and long-term performance standards.

Whether you already have a clear concept or need assistance from our design team, ADCON works closely with you to bring your ADU goals to life. We are committed to respecting your vision, budget, and construction timeline, delivering efficient, well-executed ADU solutions throughout San Francisco and the Bay Area.

Build a Custom ADU House


ADCON Construction & Engineering is a trusted choice for building custom ADUs in San Francisco. Whether your goal is to create comfortable housing for family members or to add a low-maintenance rental property, our team delivers well-planned, code-compliant ADU solutions tailored to your needs.

With extensive experience in San Francisco ADU regulations and local zoning laws, we move projects forward efficiently by developing sound designs that meet all building and safety requirements. Our familiarity with the permitting process helps reduce delays and streamline approvals—making it easier to turn your ADU plans into reality.

We look forward to learning more about your property and the additional living space you’re planning to build. Contact ADCON today to schedule a consultation with our design team at a time that works best for you.

Partner with a Seasoned ADU Construction Company



Working with a specialized ADU construction company ensures you get the greatest value from your investment. At ADCON Construction & Engineering, our licensed, bonded, and fully insured professionals deliver efficient, code-compliant ADU solutions in San Francisco—without unnecessary delays or surprises.

When you partner with ADCON for your ADU project, you can expect:

  • A streamlined permitting process supported by local ADU expertise

  • Use of top-quality building materials and trusted brands

  • Clear respect for your budget and project timeline

  • Guaranteed workmanship backed by professional standards

From planning through completion, ADCON is committed to building ADUs that are functional, durable, and designed to maximize long-term value for your property.

What’s an ADU Home?


While ADU regulations vary by municipality, there are a few key requirements that typically apply regardless of location. Most ADUs must adhere to size limits and occupancy rules, and navigating these regulations correctly is essential for a successful project.

In general:

  • The ADU may not exceed 1,200 square feet

  • Owner occupancy is often required in either the primary residence or the ADU

At ADCON Construction & Engineering, our ADU specialists guide you through local San Francisco ADU requirements, zoning rules, and permitting considerations—ensuring your project is compliant, efficient, and stress-free from start to finish.

ADU Spaces We’ve Successfully Built

  • In-Law & Granny Suites

  • Long-Term Rental Units

  • Short-Term Vacation Rentals

  • Home Offices

  • Art & Creative Studios

  • Flexible Multi-Use Living Spaces

Whether you’re adding space for family, generating rental income, or creating a functional workspace, ADCON delivers custom ADU solutions designed to maximize value and usability while meeting all local regulations.

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