Business Details
27 Years
experience
Your Trusted Construction Partner 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 honesty, quality, and customer focus. We specialize in high-end residential and light commercial projects, including custom homes, remodels, additions, ADUs, and complex site work such as retaining walls and drainage systems. Our dual Class A (General Engineering) and Class B (General Building) licenses enable us to handle projects others cannot, from ground-up builds to tenant improvements.Leveraging cloud-based project management software and advanced scheduling tools, we deliver efficient, transparent service while maintaining the highest standards of craftsmanship. As members of the Marin Builders Association and North Coast Builders Exchange, we prioritize relationships, trust, and community-driven solutions, ensuring every project meets our clients' unique needs with precision and care.
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 over 25 years of experience in residential and commercial construction.
- Our Class A & B licenses enable handling complex site work others cannot.
- We use cloud-based project management software for transparent, efficient service.
- Our team includes third-generation construction professionals with specialized expertise.
- We guarantee accountability with direct communication and no subcontractor delays.
What people say
First class work
Excellent problem solver
Attention to detail
Prompt responses
Complete accountability
Services
Residential Construction
Gannon Construction Company specializes in custom residential builds, from ground-up construction to high-end renovations. Our team ensures precision and craftsmanship in every detail, creating homes that blend modern luxury with functional design. Clients benefit from our expertise in navigating complex terrains and local building codes.
Commercial Projects
We deliver light commercial construction for restaurants, offices, schools, and public buildings. Our approach emphasizes code compliance, purpose-driven design, and efficient project management. Clients receive tailored solutions that enhance functionality while maintaining budget and timeline integrity.
Site Work
Our Class A engineering license enables complex site work, including drainage systems, retaining walls, and utility infrastructure. We specialize in transforming raw land into buildable spaces with expert grading and slope stabilization, ensuring long-term structural integrity and compliance.
Remodels
From kitchen upgrades to full-home remodels, we execute renovations with minimal disruption and maximum quality. Our process includes collaborative planning, material selection guidance, and seamless coordination with designers and subcontractors to achieve clients' vision.
ADUs
We design and build ADUs that add living space and property value. Our team handles permits, zoning requirements, and construction logistics, creating functional, code-compliant units tailored to homeowners' needs while integrating seamlessly with existing structures.
People
Brian Gannon
Founder and Project Manager
Brian Gannon founded Gannon Construction Company in 1999 after 25 years as a project manager for a major Bay Area commercial firm. He oversees all operations, leveraging his expertise in contract management, subcontractor coordination, and complex project execution to ensure client satisfaction.
Gretchen Stagg
Office Manager
Gretchen Stagg manages GCC's financial operations with 30 years of bookkeeping experience. Her background in tax preparation and community service on the Tamalpais Community Services District Board ensures meticulous financial oversight and client-focused administrative support.
Collin Martin
Project Manager
Collin Martin, Brian's grandson, brings a Construction Management degree from Cal Poly and internship experience to his role. He splits time between fieldwork and office management, applying modern techniques to maintain GCC's standards of quality and efficiency.
Questions
What types of construction projects does Gannon Construction Company handle?
We specialize in residential construction, commercial projects, ADUs, and complex site work including drainage and retaining walls.
Which areas do you serve?
We operate primarily in Marin, Sonoma, Napa, and San Francisco counties.
How does Gannon Construction Company manage project timelines and budgets?
We use cloud-based software for real-time tracking, ensuring transparency and efficiency while adhering to agreed schedules and costs.
Are financing options available for large projects?
We do not offer in-house financing but can recommend trusted third-party lenders for qualified clients.
Do you handle emergency repair work?
We focus on planned projects and do not provide emergency repair services.
What sets Gannon Construction Company apart from competitors?
Our dual Class A/B licenses, third-generation expertise, and direct owner involvement ensure unmatched accountability and craftsmanship.
