Modesto Construction Company & General Contractor

Highly experienced in jobs of all types and sizes

Airtight Construction, Inc. is a premier construction company and general contractor in the Modesto area with extensive experience in a wide range of services. We’ve become the company of choice for:

We have worked for decades with owners and managers of occupied commercial buildings, industrial manufacturing plants, and residential dwellings throughout the Modesto area and beyond. Headquartered in Concord, California, our fully equipped and professionally staffed organization can meet any construction, renovation, or retrofit need. We can serve as a single point of contact for the most complex and time-constrained projects.

We are committed to the responsive delivery of flawless craftsmanship and the industry’s best customer service for our many Modesto area, Central Valley, SF Bay Area and Northern California clients. We bring proven expertise and time-tested techniques to every job. While most companies rely on subcontractors for major parts of their work, we do everything in house. This allows us to maintain tight control over quality and scheduling of the work performed. Our cleanup crews work daily to keep the job-site clean, safe, and usable at all times.


Here are just a few of the construction partners and projects whose vision we have brought to life:


Committed to the Satisfaction of Our Modesto Customers

Airtight Construction, Inc. provides unmatched expertise in a full range of construction services for Modesto companies and homeowners. We stand behind our work and offer one of the best guarantees in the business. Our promise is to provide professional construction, retrofit, and repair services quickly, efficiently, and with the least amount of disruption.

By contracting maintenance, renovations, construction services or repair through ATC you will get construction experience, unmatched expertise, a reputation for quality and a single source for a full-range of services. Our promise is to provide professional construction, retrofit and repair services quickly and with the least amount of disruption.


I want to express my greatest thanks for the excellent roofing, siding replacement, ADA hand rail, and concrete work you performed. Kaiser Permanente and PG&E were very pleased with your work. The planning and execution of the job was very evident and the workmanship cannot be matched. I have and will continue to recommend Airtight Construction.

Vern Cummings, Park Shadelands Business Park


Modesto, CA is named after the Spanish word for modest, and is the county seat and largest city of Stanislaus County. It is the 18th largest city in the state and located in the Central Valley.

The rich soil and mild Mediterranean climate helped establish Modesto as a prosperous agricultural and farmland area. Famous for the farm to table movement, Modesto produces milk, almonds, chickens and walnuts.

The wholesome atmosphere and the fortunate birth of filmmaker George Lucas helped put this “modest” town on the map. He based his film American Graffiti on the streets of Modesto, and followed that enterprise with the TV series Happy Days.

The city is also famous for its’ mid-century modern architecture during the 1940’s and 1950’s. This movement left behind many fine architectural homes and buildings that are sought after by home buyers and investors. The area is lucky to have affordable housing, but is not so fortunate in having an equally robust job market. The Gallo winery is located here and is the largest winery in the US. That helps give residents a reason to celebrate their city.