We Make Construction Look Easy

Partner with Pennsylvania’s
Best Construction Firms

At WDP, we are dedicated to serving our clients with integrity. That means going the extra mile to make certain you receive incredible value from all the firms in the Williams family of companies. Our heritage is in civil engineering, sitework and construction, and we are pleased to provide our premier construction services on every development project we undertake.

AP Williams logo
Williams Site Civil logo
Mainline Excavating logo
Civil engineer planning construction

Expert Site Civil Engineering

In civil engineering, as in all of construction, details matter. Our sister company, Williams Site Civil, provides civil engineering design services that go beyond simply satisfying jurisdictional requirements. The synergies and knowledge sharing that happens between our general contracting, excavating and site civil firms helps each to focus more clearly on solving challenges and delivering exceptional value engineering throughout the entire project.

With over 50 years of professional knowledge in hand, the Williams Site Civil team has been involved with hundreds of projects of all sizes, including commercial, industrial, residential and entertainment properties. We are diligent in our analysis, pay attention to the details, and ensure that every aspect of the site design is focused on providing the client a superior pre-construction experience.

Commercial retail building Harrisburg

Harrisburg’s Trusted Commercial Construction Firm

Our sister company, A. P. Williams, is one of Central Pennsylvania’s most respected commercial construction firms, and we are pleased to work with them for each of our development projects. With an unwavering attention to detail and dedication to integrity, honesty and communication, APW continually delivers buildings of exceptional value and unmatched quality.

Our connection with APW provides our team with an enhanced level of understanding and knowledge at all stages in the development process, allowing us to sidestep potential problems, limit change orders, increase value engineering, and enhance coordination between all companies.

We Perform:
  • New construction
  • Tenant fit-outs
  • Renovations

Safety Commitment

Construction work requires complete focus and deliberate attention to safety every minute of the day. We demonstrate our personal commitment to the safety of our team, our clients, and the community by ensuring that everyone on our jobsites is properly trained in safety protocols.

To keep safety top-of-mind for each of our employees, each day begins with a review of the work that will be performed, areas with special safety considerations are identified and proper procedures explained. OSHA guidelines and safety procedures are strictly enforced. We maintain a “see something, say something” approach on all our sites that empowers our team members with the ability to correct and report safety issues quickly so they can be resolved.

Developing land in Harrisburg PA

Pennsylvania’s Excavating Leader

Mainline Excavating is part of the Williams family of companies, and our proud sitework partner for all of WDP’s projects. Dedicated to finding cost-saving engineering alternatives wherever possible, Mainline uses a common-sense approach to keep costs down and ensure a superior foundation for the construction work to come.

Services Include:

  • Site layout & feasibility analysis
  • Grading
  • Utilities
  • Stormwater
  • Paving
  • Sustainability
  • Construction stake out
  • GPS control

Construction Leaders

Contact Williams Development Partners to speak with one our construction experts about your upcoming project.

(717) 909-7117

Commercial construction site in central PA