Commercial Construction


Residential Construction


Listen. Communicate. Develop.
Working diligently to ensure your ideas, time, and budget take priority.


Combining creativity, knowledge and craftsmanship to deliver a fluid start through finish project.


Open and timely communication combined with professionalism to deliver quality craftsmanship on every project.


Delivering the highest quality work, that is competitively priced. We value our customers and provide complete transparency throughout the entirety of the project.

About Key Builders

Key Builders Construction is a general contracting company that specializes in commercial, residential, remodel, new-build, and design-build construction. We are located in Bureau County, within the small town of Princeton, IL. As a company, we have developed trusting relationships within many communities, allowing us to continue developing and restoring new designs throughout Northern Illinois and surrounding regions. Our team works to deliver high- quality craftsmanship, while providing open communication to best understand each client’s vision. We value our past, present, and future customers and look forward to working with you.

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Residential Construction

Through collaboration, we take your ideas, and our expertise, to create a space that fits your vision that’s unique to your home. While specializing in new-builds, remodels, customizations, decking, and additions, for the last 30 years, we are consistently evolving with new residential trends. Our project management services will communicate, share ideas, and deliver quality craftsmanship.

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Commercial Construction

Since 1988, Key Builders has developed a reputation for quality work and excellent customer service, allowing over 100 commercial projects to have been completed across Northern Illinois. We specialize, but are not limited to a multitude of construction types such as: banking, religious, retail, veterinary, healthcare, recreational, industrial, and arts.

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“When Key Builders is involved, clients see what they’re paying for.”

Dave Mitchell of Mitchell Associates Architects has worked with Key Builders for more than ten years on design-build commercial and industrial construction projects.

Dave Mitchell - Mitchell Associates Architects

“They will do everything they can to keep projects moving according to schedule.”

In 2006, Key Builders won a $1.2 million contract for the construction of Prophets Riverview Independent Living, a 24,000 sq. ft. assisted living facility in Prophetstown, Illinois. CADM Architecture was so pleased with its relationship with Key Builders and Key Builders’ work that the firm invited Key Builders to go on the road to Lodi, Wisconsin, to complete another assisted living construction project.

Blake Dunn - President, CADM Architecture

“Key Builders made my job easier.”

When Gorski Reifsteck Architects is looking for a general contractor who knows how to work with architects, they make sure that Key Builders is on the top of the list of bidders.

John Grice - Construction Manager, Gorski Reifsteck Architects

We found a great combination of experience and integrity in Key Builders.”

When the Dixon Animal Hospital and the Sauk Valley Veterinary Clinic were looking to leave their small and outdated facilities and merge as the River Ridge Animal Hospital, they called on Key Builders’ design-build and construction management services to get the job done.

Drs. Phil and Sarah Fassler - Owners, River Ridge Animal Hospital

“We wanted a building that would last 100 years: Key Builders helped us reach our goal.”

Phil Kaufman, administrator at Greenfield Assisted Living, was one of the primary contacts with Key Builders when his facility contracted the firm in 2007 for a $3.4 million addition.

Phil Kaufman - Administrator, Greenfield Assisted Living

“They saved us in so many different ways. They saved us money. They saved us time. They saved us heartache.”

When the Abiding Word Church of Princeton, Illinois, decided to build a new facility, they partnered with Key Builders’ design-build construction management services to create a church that would inspire.

Rev. Scott Porter - Senior Pastor, Abiding Word Church

“They made us feel like we were their most important client.”

When First Trust & Savings Bank in Watseka, Illinois, needed to renovate their office and lobby space — without any downtime for bank operations — they turned to Key Builders to keep the wheels of finance turning.

Kerry Bell - President, First Trust & Savings Bank

“We were very impressed by the quality of workmanship. Everything was completed on schedule and completely to our satisfaction.”

Peoples National Bank offers its highest recommendation to Key Builders for its on time, on budget construction of its branch in Kewanee, Illinois.

Charles D. Eastman - President, Peoples National Bank

“They are very good at keeping a project on time and on budget, and you see everything before any costs are incurred.”

Don Kotecki of Machinery Maintenance Inc. has contracted with Key Builders on several occasions for building additions and new construction.

Don Kotecki - Machinery Maintenance

“Ten years later it is still an excellent facility. Visitors are so impressed with the layout, its professional beauty and simplicity.”

Sauk Valley Newspapers contracted with Key Builders’ design-build construction services to reimagine an old lumber yard and transform it into a state-of-the-art newspaper facility.

Tom Shaw - Sauk Valley Newspapers

“We have a beautiful renovation because Key Builders does quality work.”

The Grace Performing Arts Center had the chance to renovate an old newspaper building and turn it into a theater space for their summer theater festival. The group turned to Key Builders to help them transform their dream into a reality, on a budget that a nonprofit could afford.

Terri Zearing - Former President, Princeton Theater Group

“On behalf of the taxpayers of Princeton, Key Builders made sure that everything that was supposed to be done was completed and that all work was performed to the highest standards.”

When the time came to transform an old grocery store into a state-of-the-art library, the Princeton Public Library tapped Key Builders to create an attractive, multipurpose facility that the whole community could be proud of.

Laurie Bonucci - President, Princeton Public Library

“The process of going through a construction project can be overwhelming for an owner. But with Key Builders, I am confident that they are going to do right by the company and by me.”

The Woodhaven Association, a recreational area in Sublette, Illinois, has called on Key Builders over the years for the renovation and construction of several buildings and sites on their extensive property. The relationship began when Key Builders was the low bidder for a Woodhaven project. Woodhaven was so impressed with Key’s work that the association has opted for our design-build construction process for several additional construction projects, rather than working through the traditional design-bid-build process.

Karen Roche - Woodhaven Association

Outstanding Craftmanship.
Uncommon Value.

Delivering high-quality, value-driven residential and commercial construction services for an outstanding result.

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