Our annual ranking of top construction firms highlights the top companies in Sonoma 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 very useful for many people involved in the construction industry. Companies that supply materials or services to general contractors can use construction market trends and construction analytics to find the right customers. By paying attention to important moments, such as the start of big construction projects and reviewing the building construction history, these suppliers can reach out at the best time when contractors are likely to need new materials or help. They can also study how contractors grow and change over time using detailed contractor data to focus on those who are expanding their business. Subcontractors can use similar data to connect with general contractors for new work opportunities. At the same time, real estate developers, property owners, and others looking to hire contractors can use detailed information to check the skills, experience, and contractor license of contractors and subcontractors before choosing who to work with.

Business# Projects (’23)Average Contract Value
Warren Construction35$34K
Giovacchini Construction15$6K
MJF Construction6$85K
Green Bay Remodeling6$81K
Sightline Builders5$69K

Warren Construction

Address:
5642 Bellflower Blvd, Lakewood, CA 90713

Founded in 1985, Warren Construction specializes in providing building owners and managers with clear, transparent information about their commercial roofing assets. Over the years, they have shifted focus from residential development to expert commercial roof replacement, maintenance, and repairs.

Data from the City of Sonoma Community Development Department was also examined by the General Contractors Magazine team to identify past projects completed by Warren Construction. Back in 2017, Warren Construction handled a kitchen and bathroom remodel valued at $1,000. Later, in 2019, Warren Construction took on a $350,000 project involving a single-family dwelling addition and interior remodel, including kitchen work.


Giovacchini Construction

Address:
1370 Industrial Ave, Petaluma, CA 94952

Giovacchini Construction, serving Sonoma, Marin, Napa, and Solano counties since 1999, is a fully licensed and insured general contractor known for its commitment to quality craftsmanship, integrity, and reliable service. With over 21 years of experience and a team boasting nearly a century of combined construction expertise, the company handles a broad range of residential and commercial projects, including luxury bathroom remodels, tenant improvements, and routine maintenance. Under the leadership of President Vince Giovacchini—who brings decades of hands-on experience in construction and pest control—the company has built a strong reputation for professionalism, safety, and client satisfaction, with most new business coming from referrals. Giovacchini Construction also prioritizes clean, safe, and drug-free worksites and invests in state-of-the-art tools to deliver precise, timely results. Beyond construction, the company is deeply involved in philanthropy, donating labor, materials, and funds monthly to support Petaluma’s Village Network, helping seniors with home repairs at no cost. Their dedication to building lasting relationships with clients, employees, and the community sets them apart as a trustworthy and respected local contractor. Whether managing complex commercial needs or bespoke residential projects, Giovacchini Construction consistently delivers with integrity and care.

The City of Sonoma Community Development Department reviewed data on past projects by Giovacchini Construction, which was further analyzed by the General Contractors Magazine team. In 2009, the company carried out a kitchen remodel project costing $62,825. Later, in 2013, Giovacchini Construction completed kitchen work valued at $6,280.


MJF Construction

Address:
4070 Apricot Rd, Simi Valley, CA 93063

MJF Construction is a trusted full-service general contractor specializing in new construction, remodeling, commercial, and multi-family projects. Known for quality craftsmanship and integrity, they guide clients from pre-construction through completion with open communication and superior customer service. Their commitment to excellence and competitive pricing has earned them a strong reputation for delivering projects right the first time.

Data from the City of Sonoma Community Development Department on MJF Construction’s past projects was examined by the General Contractors Magazine team. In 2019, MJF Construction completed a full kitchen and bathroom remodel valued at $68,000. More recently, in 2024, the company undertook a $200,000 project involving a 190-square-foot addition and remodeling of an existing 1,139-square-foot area, which included a complete kitchen remodel.


Green Bay Remodeling

Address:
1170 Burnett Ave, Concord, CA 94520

Green Bay Remodeling is a full-service home remodeling company serving the San Francisco Bay Area, Austin, TX, and Southern California, specializing in kitchens, bathrooms, ADUs, and full-scale home construction. Since its founding, the company has earned a reputation for combining style with precision, offering a seamless design-build process that takes projects from concept to completion with minimal stress for clients. Recognized as one of the fastest-growing private companies in the Bay Area and ranked on the Inc. 5000 list, Green Bay Remodeling boasts numerous awards, including top ratings on Home Advisor and Yelp. Their dedicated project managers focus on one project at a time, ensuring constant communication and personalized attention. The company provides free 3D design services to help clients visualize renovations before work begins, making remodeling transparent and accessible. With multiple regional offices and a licensed, insured team committed to industry-leading standards, they handle everything from permitting to construction under one roof. Green Bay Remodeling also offers flexible home additions and basement renovations, allowing homeowners to expand and customize their living spaces over time. Known for delivering quality craftsmanship on time and within budget, the company prides itself on customer satisfaction and exceeding expectations at every stage.

The General Contractors Magazine team analyzed project records from the City of Sonoma Community Development Department to identify past work by Green Bay Remodeling. In 2023, Green Bay Remodeling completed a remodel involving the kitchen, bathroom, living room, and deck, with a project cost of $234,000. Then, in 2024, the company carried out a full house remodel, including upgrades to the kitchen, bathroom, and utilities, valued at $285,000.


Sightline Builders

Address:
4676 Hessel Rd, Sebastopol, CA 95472

Sightline Builders is a trusted Sonoma County-based contractor specializing in both residential and commercial renovation and remodeling projects, with a strong focus on creating personalized, functional spaces that reflect clients’ lifestyles and business needs. With extensive expertise in everything from historic restorations and ADA compliance upgrades to modern kitchen and bathroom remodels, the company excels in delivering tailored solutions such as accessory dwelling units (ADUs), room additions, and complete home rebuilds. Sightline Builders guides clients through every phase—from design concept and permit procurement to construction—ensuring projects stay on schedule and within budget. Known for blending the latest design trends with practical functionality, the firm helps homeowners and businesses alike transform their environments into efficient, stylish spaces. Their commitment to clear communication and attention to detail has made them a go-to choice in Sonoma, Sebastopol, Santa Rosa, and Petaluma. Whether updating interiors with smart appliances and eco-friendly features or enhancing curb appeal through exterior renovations, Sightline Builders prioritizes both aesthetics and long-term value. They understand the unique challenges of rebuilding after disasters and work closely with clients to navigate complex decisions around renovation versus rebuild. Combining sustainable practices with innovative designs, Sightline Builders continues to set a high standard in the local construction industry, earning respect for their professionalism and client-focused approach.

Data from the City of Sonoma Community Development Department on past projects by Sightline Builders was also reviewed by the General Contractors Magazine team. In 2015, Sightline Builders completed an estimated $12,500 project involving an 86-square-foot kitchen remodel. More recently, in 2025, the company undertook an interior renovation, which included both kitchen and bathroom remodels, valued at $179,000.


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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