Business Details
37 Years
experience
Custom Home and Commercial Construction Experts
Grassi Construction has been crafting custom estates and select commercial projects in California's Napa and Sonoma valleys since 1989. Our team of builders, craftsmen, and artists approaches every project with collaborative innovation, transforming architectural visions and client dreams into tangible realities. With decades of combined experience, we prioritize value-driven construction while maintaining an unwavering commitment to quality craftsmanship.Our expansion to Park City, Utah extends this philosophy to the Mountain West region. We maintain transparent, trust-based relationships through open-book operations, ensuring clients receive exceptional value for every investment. Our team members, many with long-term tenure, bring trade expertise and a deep understanding of construction from both practical and business perspectives.
Services
Custom Home Building
Commercial Construction
Estate Renovations
Project Management
Design-Build Services
Details
- Year established: 1989
Highlights and features
- 35+ years of specialized expertise in custom residential and commercial construction
- Collaborative team approach with architects and clients
- Team members with decades of trade experience
- Transparent open-book operations for client trust
- Expanded expertise serving Mountain West regions from Park City office
Services
Custom Home Building
We create one-of-a-kind residential properties tailored to client visions and site-specific contexts. Our process integrates architectural intent with practical construction expertise, ensuring each home reflects both aesthetic aspirations and functional requirements. With decades of experience in Napa Valley's unique landscape, we deliver custom solutions that harmonize with their natural surroundings.
Commercial Construction
Our commercial construction focuses on select, high-quality developments including wineries and specialty buildings. We maintain the same attention to detail as residential projects while addressing commercial requirements. Our team's experience with agrarian-style architecture and seismic considerations ensures code-compliant, aesthetically cohesive commercial spaces that enhance their environments.
Project Management
We provide comprehensive project management services maintaining transparency throughout the building process. Our approach coordinates all stakeholders while preserving budget integrity. With team members having engineering and biological science backgrounds, we implement systems that streamline construction workflows while maintaining strict quality control standards for every project phase.
Design-Build Services
Our design-build methodology combines architectural vision with construction expertise under one team. This collaborative approach ensures seamless transitions from concept to completion. By maintaining continuity between design intent and execution, we deliver cohesive projects that meet both aesthetic goals and practical requirements while optimizing efficiency throughout the building process.
Estate Renovations
We specialize in transforming existing estates while preserving their architectural character. Our team understands the complexities of working with established properties, balancing modernization with historical integrity. Using reclaimed materials and traditional techniques, we enhance functionality while maintaining the original spirit of each estate through meticulous attention to detail.
People
Mark Grassi
Founder
Founder with 35+ years in construction, Mark Grassi established the company in 1989. He brings hands-on trade experience and business acumen, having worked in construction since his school years. His leadership emphasizes craftsmanship and team collaboration.
Paul Niles
Partner
Partner since 2000, Paul Niles specializes in custom project execution. With prior experience as superintendent and project manager, he ensures seamless collaboration between clients, architects, and subcontractors while maintaining Grassi's quality standards.
Laurie Daw
Partner & Controller
Office manager since the company's inception, Laurie Daw oversees financial operations and company culture. With over 30 years of experience, she ensures operational efficiency while maintaining the family-business atmosphere that defines Grassi's team dynamics.
Ralph Dahllof
Partner & Project Manager
Project manager with extensive mountain region experience, Ralph Dahllof brings expertise in high-standard construction. His decade of Lake Tahoe projects informs his approach to quality execution while balancing work with outdoor pursuits in California's wilderness areas.
Mike McSweeney
Partner & Project Manager
With a background in biology and engineering, Mike McSweeney combines scientific precision with construction management. His fourth-generation California roots and graduate education inform his collaborative approach to project delivery and stakeholder coordination.
Questions
What types of projects does Grassi & Associates specialize in?
We focus on custom residential estates and select commercial projects, particularly in Napa Valley, Sonoma County, and Mountain West regions. Our expertise includes high-end homes, boutique wineries, and specialty buildings requiring artisanal craftsmanship.
How long has Grassi & Associates been in business?
Founded in 1989 by Mark Grassi, we've completed over 35 years of continuous operation. Many team members have worked together for decades, maintaining consistent quality standards throughout our history.
What makes Grassi & Associates different from other builders?
Our collaborative approach combines trade expertise with business acumen. Team members come from construction backgrounds, ensuring practical knowledge informs every decision. We maintain transparency through open-book operations and prioritize long-term relationships over formulaic solutions.
Do you work outside California's Wine Country?
While we began in Napa and Sonoma valleys, we expanded to Park City, Utah in 2025. Our Mountain West office serves clients throughout that region while maintaining the same attention to detail that defines our California projects.
How does Grassi & Associates handle project collaboration?
We use a team-based approach involving clients, architects, and subcontractors throughout the process. Our open-book policy ensures transparency, while decades of working relationships with trade partners enable seamless execution of complex construction projects.
