Family Owned. World-class Results.

We believe in open communication, doing what we promise and making sure things are done right the first time.

In 1994, Paul Williams founded A.P. Williams, the first of the Williams family of companies, in his garage. Paul had vast experience in the industry, working as a civil engineer for the U.S. Army Corps of engineers, then in the private industry as a project developer and construction manager.

Family owned - world class results

A year later, his brother, Drew Williams, joined the firm to help take it to the next level of success. Drew is a licensed Professional Engineer, with experience overseeing millions of dollars of bridge and highway construction throughout Central Pennsylvania with the Pennsylvania Department of Transportation.

Together, the Williams brothers utilize their knowledge of all aspects of the construction industry to create a new kind of construction firm that is completely open, honest and committed to the success of each client. APW takes an “open book” approach, providing up-to-date, critical information about design and pricing that allows project owners to become active partners in the construction process. With APW, owners know exactly why decisions are made and how their money is being spent.

At A.P. Williams, the way we run our business and manage our projects is the way we conduct our lives - with uncompromising integrity and a commitment to be the very best. This commitment demands that we never become content with what we have accomplished and that we continually learn to improve in every facet of our business. It demands that our business practices be completely open and honest, driven entirely by our responsibility to always act in the best interest of our client. Our commitment is to provide each client with the personal care and attention that only a small business can offer. To us, being the best means effectively using the combined knowledge, experience and talents of the APW team to ensure that each project we build is one of the highest quality and exceeds our clients' greatest expectations. We'll take pride in building your next building.

Today, Drew and Paul work side by side with their daughters, Kelly and Carleigh Williams, who carry on the proud tradition of construction excellence.

A Complete Turnkey
Construction Experience

Over the decades, APW continued to thrive, gaining a reputation as one of Central Pennsylvania’s most respected construction contractors. The brothers saw an opportunity to expand their services, allowing them to more tightly control the value engineering, budget, and schedule on projects while bringing their customer-focused construction philosophy to new levels by founding new affiliated companies.

Development Partners

A.P. Williams began offering development services as a special offering in 2004. As their reputation for delivering superior turnkey development services grew, the Williams brothers decided to formally establish Williams Development Partners in 2019. Paul and Drew have been developing residential, commercial and retail facilities for themselves and private clients for many years. WDP leverages the expertise of the entire Williams portfolio of companies, providing all the expertise needed to complete a project from concept through construction all under one roof.


In 2000, Drew and Paul expanded their construction offerings with Mainline Excavating, Inc. Mainline specializes in all aspects of commercial sitework, including site analysis, utilities, grading, stormwater, paving and value engineering. As part of the Williams family of companies, the experts at Mainline have a deep understanding of both the site and building construction processes, allowing them to identify valuable cost-saving alternatives that can be implemented at the preconstruction stage.

Site Civil

Established in 2017, Williams Site Civil is one of Pennsylvania’s most respected civil engineering firms, providing a complete range of services, including site evaluation, site selection, zoning analysis, site design, civil design, land use permitting, soil stabilization, stormwater management, utility optimization, ADA compliance and more. WSC leverages expertise from the Williams family of companies to provide optimized designs that provide extraordinary value to their customers.