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New two-story detached accessory dwelling unit in San Francisco

Accessory Dwelling Unit (ADU) Construction in San Francisco

Pinnacle Construction builds ADUs across San Francisco and the Bay Area – detached backyard units, attached units, and garage conversions. The goal is a finished ADU that feels integrated, comfortable, and built to last.

Complete ADU construction

ADU projects often involve structural changes, foundation adjustments, utility upgrades, and careful coordination between several trades. As the general contractor, we manage the construction work, subcontractors, site access, deliveries, schedule, quality control, and required inspections.

We work closely with homeowners to build ADUs that provide independent living space for family, guests, or other approved uses.

We understand the construction challenges of building an ADU on a tight San Francisco lot or alongside an older home.

Our ADU construction services

Detached backyard ADUs

Standalone units built for flexible, independent living.

Attached ADUs

Integrated living spaces designed within or alongside the existing home.

Garage and ground-floor conversions

Thoughtful conversions that turn underused areas into livable square footage.

Framing and foundation work

The concrete and framing work shown in the architectural and structural plans.

Plumbing, electrical, heating, and cooling

Plumbing, electrical, heating, and cooling installed for everyday use.

Insulation, walls, painting, and carpentry

Interior construction and finish work that creates a polished result.

Windows, siding, and exterior finishes

Roofing, siding, windows, and exterior finishes completed to match the rest of the home.

Construction schedule and inspections

The trades, deliveries, site work, and required inspections organized around one construction schedule.

Common questions

What types of ADUs do you build in San Francisco?
We build detached backyard ADUs, attached ADUs, and garage or ground-floor conversions. The right option depends on the existing property, available space, and the plans prepared for the project.
Can an ADU be rented out in San Francisco?
An ADU may be eligible for rental use, depending on the property and local requirements. The project architect or other design professional should confirm the approved use and permitting requirements; Pinnacle manages the construction and schedules required inspections.
Do ADU projects include the foundation and structural work?
Yes. We can build the foundation, framing, plumbing, electrical, heating and cooling, exterior, and interior finishes shown in the plans, and schedule required inspections during construction.
How is a garage conversion different from a detached ADU?
A garage conversion uses an existing structure, while a detached ADU is a separate building with its own foundation, walls, roof, and windows. The site, available space, and intended use help determine which approach makes more sense.

Licensed San Francisco general contractor

Pinnacle Construction and Development, Inc. is a licensed and insured San Francisco general contractor (CSLB License No. 976872) specializing in ADU construction, based at 2741A Geary Blvd.

Service area

We build ADUs for homeowners across San Francisco, San Mateo, and the Peninsula.

Discuss your project

Call (415) 881-1823 or email info@sfpinnacle.com. Share the property address, a short description of the work, and any plans or photos you have.

"We couldn't be happier with the final product, both visually and structurally. The attention to detail was outstanding."

Kieran W., San Francisco

"They did a great job and were very professional. Pinnacle handled all communication with the city, so we didn't have to worry about anything."

Ricky A., Daly City

"The team was extremely responsive and offered creative, budget-friendly solutions. Everything went smoothly."

Wilson W., San Francisco

Related services: Ground Floor Conversions · Home Additions · New Construction

Tell us about your project

Send us the property address, a short description of the work, and any plans or photos you have. We will review the construction needs and explain the next step.

Pinnacle Construction and Development, Inc.
2741A Geary Blvd, San Francisco, CA 94118
(415) 881-1823 · info@sfpinnacle.com
License No. 976872 · bonded and insured