Surveying & Mapping

We focus our expertise on traditional surveying methods, as well as electronic measuring, photogrammetric mapping and other state-of-the-art methods.

Civil Engineering

We service all aspects of civil engineering including stormwater management, erosion control plans, floodplain studies and highway occupancy permits.

Land Planning

Whether it’s subdivision plans, estate planning, sewage plans, or site feasibility analysis, we offer the guidance and experience that provides peace of mind.

View our Portfolio to see a sampling of our projects.

Celebrating 130 Years of Service and Commitment

Serving Northern Lancaster County since 1885, Diehm & Sons offers a wide variety of land planning consulting services. Our long-standing history in Central Pennsylvania contributes to our extensive knowledge in land surveying, subdivisions, land planning, land design and civil engineering. Not only do we understand the complexities brought about by progress, we know how important it is for you to have personal one-to-one service.