Business Details
27 Years
experience
Your Trusted Construction Partner in Marin County
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 firm combines decades of industry expertise with cutting-edge technology to deliver high-quality residential, commercial, and site work projects. Our team holds both Class A (General Engineering) and Class B (General Building) licenses, enabling us to manage complex projects from raw land preparation to finished structures. We utilize cloud-based project management software (Procore) and advanced estimating tools to ensure efficiency, transparency, and cost-effectiveness.With a focus on relationships and trust, we work closely with clients from initial concept through completion, prioritizing precision, craftsmanship, and client satisfaction. Our portfolio includes custom homes, remodels, additions, ADUs, restaurants, schools, and public buildings, all executed with a commitment to solving challenges proactively and maintaining accountability throughout the construction process.
Services
Custom Homes
Remodels
Additions
ADUs
Commercial Projects
Site Work
Retaining Walls
Drainage Systems
Driveways
Public Buildings
Details
- Year established: 1999
Highlights and features
- We offer over 25 years of experience in residential and commercial construction.
- Our team holds both Class A and Class B general contractor licenses for complex projects.
- We utilize cloud-based project management software for transparency and efficiency.
- Our family-owned business prioritizes relationships and trust with clients.
- We specialize in high-quality solutions for challenging site conditions.
What people say
First class
Excellent problem solver
Attention to detail
Prompt responses
Highly recommend
Services
Custom Homes
Gannon Construction Company specializes in crafting high-end custom homes tailored to client specifications. Our team ensures precision and craftsmanship from foundation to finish, incorporating modern design and functional spaces. With over 25 years of experience, we deliver unique residential solutions that enhance property value and client satisfaction.
Remodels
We provide comprehensive remodeling services for kitchens, bathrooms, and entire homes, focusing on quality and client needs. Our process integrates innovative design with practical functionality, ensuring spaces are updated to meet modern standards. With expertise in complex renovations, we transform existing structures into beautiful, functional living areas.
Site Work
Our licensed team handles complex site work including grading, drainage, and utility infrastructure with precision and efficiency. From raw land preparation to solving challenging terrain, we utilize advanced equipment and techniques to ensure project readiness. This expertise allows us to manage foundational aspects critical to successful construction outcomes.
Commercial Projects
Gannon Construction Company delivers high-quality commercial projects including restaurants, offices, and public buildings with code compliance and purpose-driven design. We apply the same craftsmanship and project management excellence as in residential work, ensuring efficient and durable commercial spaces. Our experience spans diverse sectors, meeting specific business needs with tailored solutions.
Additions & ADUs
We specialize in creating seamless home additions and accessory dwelling units that add value and functionality. Our approach combines structural integrity with aesthetic appeal, addressing growing demand for flexible living spaces. With attention to detail and local regulations, we ensure each project enhances the existing property while meeting client requirements.
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 quality control to ensure client satisfaction.
Gretchen Stagg
Office Manager
Gretchen Stagg manages financial operations with 30 years of bookkeeping experience, specializing in sole proprietorships. Her expertise ensures accurate tracking of project budgets and company finances.
Collin Martin
Project Manager
Collin Martin holds a degree in Construction Management and works on-site and in the office. His background includes internships with three construction firms, providing diverse industry knowledge for effective project execution.
Questions
What types of construction projects does Gannon Construction Company handle?
We specialize in residential (custom homes, remodels, ADUs), commercial (restaurants, schools), and site work (retaining walls, drainage) throughout Marin County and surrounding areas.
Are you licensed for both residential and commercial projects?
Yes, we hold both Class A (General Engineering) and Class B (General Building) licenses, enabling us to manage diverse construction needs.
How do you ensure project efficiency and transparency?
We use cloud-based Procore software for project management, advanced scheduling tools, and maintain open communication throughout every project phase.
What areas do you serve?
We primarily serve Marin, Sonoma, Napa, and San Francisco counties, with extensive local knowledge and experience in these regions.
Can you handle complex or challenging construction sites?
Yes, our expertise in site work includes grading, drainage, and utility infrastructure, allowing us to tackle difficult terrain and prepare land for development.
How do you handle unexpected project challenges?
Our team proactively anticipates issues and addresses them immediately, maintaining accountability and focusing on practical solutions without passing responsibility to subcontractors.
