Business Details
27 Years
experience
Trusted Construction Services in San Rafael, CA
Gannon Construction Company is a family-owned, full-service general contractor with over 25 years of experience serving the Greater North Bay Area. Founded in 1999 by Brian Gannon, our company combines decades of industry expertise with a commitment to delivering high-quality work honestly and efficiently. We specialize in residential and commercial construction, including custom homes, remodels, additions, ADUs, and complex site work such as retaining walls and drainage systems. Our team leverages advanced project management technology to ensure precision, cost-effectiveness, and timely execution.With licenses in both Class A (General Engineering) and Class B (General Building), we handle projects from raw land development to intricate renovations. Our focus on relationships, trust, and client satisfaction has earned us long-term partnerships and a reputation as a leader in Marin Countys construction industry. We pride ourselves on solving complex challenges, maintaining open communication, and exceeding client expectations through meticulous attention to detail.
Services
Residential Construction
Custom Homes
Remodels
Additions
ADUs
Commercial Projects
Site Work
Retaining Walls
Drainage Systems
Tenant Improvements
Details
- Year established: 1999
Highlights and features
- We offer 25+ years of experience in residential and commercial construction.
- Our team holds both Class A and Class B contractor licenses.
- We utilize advanced project management software for efficiency and transparency.
- Our family-owned business prioritizes long-term client relationships and trust.
- We specialize in solving complex site work challenges others cannot handle.
What people say
First class work
Excellent problem solver
Seamless work
Exceeded expectations
Attention to detail
Services
Residential Construction
We specialize in high-end residential construction, including custom homes, remodels, and additions. Our team delivers precision and craftsmanship from ground-up builds to kitchen renovations. We focus on integrating modern design with functional living spaces tailored to client needs.
Commercial Projects
We provide light commercial construction for restaurants, offices, schools, and public buildings. Our approach emphasizes code compliance, efficient project timelines, and purpose-driven design to meet business operational needs.
Site Work
Our site work includes retaining walls, drainage systems, grading, and utility infrastructure. With Class A engineering licenses, we tackle complex terrain challenges to prepare land for construction with precision and safety.
Additions & ADUs
We design and build additions and accessory dwelling units (ADUs) that add value and functionality. Our solutions integrate seamlessly with existing homes while meeting local zoning and building regulations.
Tenant Improvements
We deliver tenant improvement projects for commercial spaces, focusing on efficient layouts, code compliance, and durable finishes. Our team coordinates with designers and subcontractors to minimize business disruption during renovations.
People
Brian Gannon
Founder and Project Manager
Brian Gannon founded the company in 1999 after 25 years as a project manager for a Bay Area commercial firm. He oversees all operations, leveraging expertise in contract management, scheduling, and client relations.
Gretchen Stagg
Office Manager
Gretchen Stagg manages financial operations with 30 years of bookkeeping experience. Her background in tax preparation and community service ensures meticulous financial tracking and client-focused administrative support.
Collin Martin
Project Manager
Collin Martin, Brians grandson, manages projects with a Construction Management degree from Cal Poly. He combines field experience with office coordination, specializing in residential and light commercial builds.
Questions
What types of construction projects do you specialize in?
We specialize in residential construction, custom homes, remodels, commercial tenant improvements, and complex site work including retaining walls and drainage systems.
Do you work outside Marin County?
Yes, we serve Marin, Sonoma, Napa, and San Francisco counties for residential and commercial projects.
What sets your company apart from other contractors?
Our family-owned business combines 25+ years of experience, advanced project management tools, and dual Class A/B licenses to handle complex projects others cannot.
Can you handle both small and large-scale projects?
Yes, we manage projects of all sizes, from minor renovations to multi-million-dollar builds, with equal attention to detail and client communication.
Are your services licensed and insured?
We hold Class A (General Engineering) and Class B (General Building) licenses and maintain full insurance coverage for all projects.
