A direct line to the builder.

Custom homes and renovations executed with care, precision, and close personal oversight throughout the project.

Summit Construction is a high-end residential builder focused on a limited number of custom homes and renovations. Clients work directly with the owner throughout the process, with an emphasis on precision, coordination, and lasting quality.

From preconstruction through completion, the work is shaped by careful planning, disciplined coordination, and close attention to execution. Each decision is made with the finished home in mind.

How the work is approached

San Francisco hillside renovation requiring extensive structural rework, careful sequencing, and close coordination to integrate a new design within the constraints of the existing exterior framing.

Featured Project

Directly led from preconstruction through completion.

Summit Construction is a residential general contractor focused on custom homes and major renovations in the San Francisco Bay Area. Led by Ron Collosi, a third-generation general contractor, the firm takes on a limited number of projects so clients and architects work directly with him throughout the process, without layers of project management between builder, design team, and owner.

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If you are planning a custom home or renovation, we would be glad to hear more about your project.

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