Our annual ranking of top construction firms highlights the top companies in Windsor based on their project volume over the past year, with a focus on relevance. This compilation is derived from permit and contractor information sourced from city, county, and state building departments through our partners at BuildZoom. For further information regarding data accuracy, please consult the note at the end of this article.

Construction data is helpful for many people involved in the building industry. Companies that supply materials and services to contractors can use construction market data to find the right customers more easily. By keeping an eye on important events like the start of big projects and tracking permits issued, these suppliers can reach out to contractors at the right time when they need materials or help. They can also study construction industry trends to focus on contractors who are expanding their businesses. Subcontractors can use this contractor data to connect with general contractors they want to work with. At the same time, property owners, real estate developers, and others looking for contractors can use the detailed information to check the skills and reliability of contractors and subcontractors before hiring them.

Business# Projects (’23)Average Contract Value
Warren Construction35$34K
Giovacchini Construction15$6K
Bartkus Remodel10$19K
Earthtone Construction5$64K
David Cunningham Construction Corporation4$5K

Warren Construction

Address:
5642 Bellflower Blvd, Lakewood, CA 90713

Established in 1985, Warren Construction specializes in providing building owners and managers with clear, transparent information to help them make informed decisions about their commercial roofing assets. Since 1999, they have focused exclusively on commercial roof replacement, maintenance, and repairs.

Data from the Town of Windsor Building Division, reviewed by the General Contractors Magazine team, reveals several past projects completed by Warren Construction. In 2017, the company completed a residential alteration focused on kitchen work valued at $1,000. Later, in 2019, Warren Construction undertook a larger project involving the addition and remodeling of a single-family dwelling, which included a kitchen remodel and was valued at $350,000.


Giovacchini Construction

Address:
1370 Industrial Ave, Petaluma, CA 94952

Giovacchini Construction, established in 1999, is a fully licensed and insured general contractor serving Marin, Napa, Sonoma, and Solano counties, with over 21 years of proven expertise in both commercial and residential construction. The company is known for its commitment to quality craftsmanship, timely delivery, and reliable, cost-efficient service, earning a strong reputation built on integrity and hard work. Led by President Vince Giovacchini, who brings decades of hands-on experience in construction and pest control, the team combines nearly a century of combined trade knowledge, much of it from second-generation professionals. Giovacchini Construction handles a broad range of projects including luxury bathroom remodels, tenant improvements, concrete work, roofing repairs, and routine maintenance. Their worksites prioritize safety, cleanliness, and professionalism, supported by state-of-the-art tools and equipment. The company also actively gives back to the community, providing free labor and materials to assist elderly homeowners through partnerships like The Village Network of Petaluma. Known for strong client relationships and a growing referral base, Giovacchini Construction emphasizes integrity, quality, commitment, safety, and long-lasting relationships with clients and the community alike. With a dedicated workforce and a reputation for excellence, they continue to deliver exceptional results across a variety of construction needs.

Information from the Town of Windsor Building Division, analyzed by the General Contractors Magazine team, highlights previous projects completed by Giovacchini Construction. In 2013, the company carried out a residential alteration that included kitchen work, valued at $6,280. Additionally, in 2009, Giovacchini Construction completed a kitchen remodel project involving the relocation of a washer and dryer, with a budget of $62,825.


Bartkus Remodel

Address:
843 Garden Ct, Petaluma, CA 94954

Bartkus Remodel, established in 2004, is a Bay Area-based home renovation company specializing in custom interior and exterior renovations, including kitchens, bathrooms, room additions, and outdoor living spaces. With over 20 years of experience living and working in the region, founder Steve Bartkus draws inspiration from the natural beauty and unique design sensibilities of the area to create harmonious, thoughtfully crafted spaces that blend seamlessly with their surroundings. Serving San Francisco, Marin, Sonoma, and beyond, the company partners closely with homeowners, architects, and engineers to transform visions into reality through expert craftsmanship and attention to detail. Their diverse portfolio includes full interior remodels, fire and water restoration, flooring, siding, patios, pergolas, stonework, and more, demonstrating versatility across a wide range of project types. Licensed in California (No. 937589), Bartkus Remodel prides itself on delivering masterful results rooted in careful planning and clear communication. Notable projects such as the Pacific Heights Apartment in San Francisco and the Arbor Oasis in San Anselmo highlight their commitment to quality and client satisfaction. Their approach emphasizes considered decisions to ensure every element fits perfectly, creating serene, functional, and beautiful environments for modern living. Over nearly two decades, Bartkus Remodel has built a reputation as a trusted partner for Bay Area residents seeking personalized, high-quality renovation services.

The General Contractors Magazine team reviewed records from the Town of Windsor Building Division to identify past projects by Bartkus Remodel. In 2024, Bartkus Remodel completed a residential addition and remodel involving kitchen work, with a project value of $90,000. Earlier, in 2021, the company managed a larger kitchen renovation project estimated at $450,000.


Earthtone Construction

Address:
6932 Sebastopol Ave, Sebastopol, CA 95472

Earthtone Construction is a people-centered company that has built a strong reputation for combining exceptional construction expertise with a culture of genuine care and personal growth. With a focus on helping clients build a better future, Earthtone emphasizes employee development and well-being, fostering a supportive environment where team members thrive both professionally and personally. Their skilled team specializes in full kitchen remodels, delivering balanced designs that blend beauty, functionality, and durability through custom cabinetry, thoughtful space planning, and high-quality materials. Earthtone’s comprehensive approach guides clients through every stage—from pre-construction feasibility and design to efficient project management and post-construction support—ensuring a smooth, transparent experience. Known for their attention to detail and commitment to smart, lasting solutions, they prioritize creating kitchens and living spaces that truly fit how people live and gather. Employee testimonials reflect a company culture that lives its mission through action, with leadership deeply invested in the growth and well-being of their workforce. This unique culture translates into high-quality workmanship and a trusted presence in their communities. Earthtone Construction continues to stand out as a leader not only in building, but also in fostering meaningful relationships with clients and employees alike.

Records from the Town of Windsor Building Division reviewed by the General Contractors Magazine team highlight previous work by Earthtone Construction. In 2022, Earthtone Construction completed a 100-square-foot kitchen and bathroom remodel that included new outlets, appliances, fixtures, and lighting, valued at $12,000. Additionally, in 2021, the company handled a larger residential remodel project involving a kitchen upgrade, with a budget of $65,000.


David Cunningham Construction Corporation

Address:
512 Oak Lake Ave, Santa Rosa, CA 95409

David Cunningham Construction Corporation is a remodeling specialist offering services such as kitchen, bathroom, basement, whole-home remodels, and additions, with notable residential projects in Windsor.

The General Contractors Magazine team analyzed data from the Town of Windsor Building Division to identify past projects completed by David Cunningham Construction Corporation. In 2021, the company undertook a residential project that included a kitchen remodel valued at $150,000. Additionally, that same year, David Cunningham Construction Corporation completed another kitchen remodel estimated at $35,000.


Note: The data used to compile this list may not be complete based on the availability of permit data – collecting and consolidating this data is a time-intensive and difficult task. It may not be complete in all areas due to jurisdictional reporting requirements and the availability of data. Job values and permit fees should be taken as estimates rather than exact values, based on the most complete permit and contractor data available. Additionally, number of projects and typical job size may be updated per contractor request.

The time period for the data used for this ranking was the past 365 days, plus an additional 45 days to account for the average timeline of a building permit. If you have any suggestions on the data or see any corrections that you’d like to give feedback on, please fill out this form. For more insights on construction data outside that are not directly related to contractors, there are other resources available as well.

Author

  • Alex Mericle is the Chief Editor at General Contractors Magazine with five years of experience in the construction space. Alex has always had a strong interest in residential and commercial construction and architecture, and he has built up technical experience with building permit data, subcontractor operations, and materials procurement over the years. On top of his experience at General Contractors Magazine, he has prior experience at BuildZoom. His analytical skillset, honed through a degree in Business Analytics from Creighton University and from his work experience, allows him to transform complex construction data into actionable insights and useful, captivating content.
    Expertise: Residential and Commercial Construction, Building Permit Data, Home Design and Build, Architecture, Subcontractor Operations, Material Procurement
    Key Highlights: Over 5 years of experience writing and editing in the construction space, Chief Editor at General Contractors Magazine, Previous experience at BuildZoom
    Education: Creighton University, Degree in Business Analytics

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