Latest Projects

Martin’s Bike Shop

The Martins were in dire need of additional retail and warehouse space to accommodate their burgeoning internet business and the growth of their retail store.

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Land Planning

At Diehm & Sons, we’ve seen how growth has influenced major changes in regulations regarding land planning and design.  Our understanding of ever-changing ordinances and regulations allows us to represent you in a way that gives you greater peace-of-mind as your plans go through the process.  We know many of the officials in the municipalities we serve and regularly attend municipal planning and zoning meetings on your behalf.  We thoroughly research the rules and regulations of each municipality, keeping abreast of any changes as they occur and communicating with officials whenever a question arises.  This attention to detail and commitment to your best interests has allowed us to successfully complete an extensive number of projects in the following areas of land planning:

Subdivision Plans

Diehm & Sons can provide comprehensive services related to all kinds of subdivision planning including small one or two lot subdivisions, road centerline separation, agricultural subdivisions, and residential, commercial and industrial subdivisions of all sizes. And, with today’s subdivision plans being more complex than ever before, we are able to address important issues on your behalf such as: stormwater management, zoning, sewage planning, environmental concerns, floodplains, wetlands, soil suitability, and erosion control.

Lot Add-on Plans

Whether it’s joining two or more properties in common, or combining a portion of your neighbor’s land to your own, Diehm & Sons can assist you in creating the plans. These projects can be done stand-alone or as part of a larger subdivision and/or land development process.

Land Development Plans

We provide comprehensive services related to land development plans for residential developments (apartments, condos, etc.), church and community projects, retail/commercial/industrial buildings and/or expansions, parking facilities, etc.

Estate Planning

We can assist with subdivision for estate planning. We have extensive experience in seeking the required approvals and waivers of requirements unique to estate planning subdivision.


Our expertise includes the preparation of zoning applications for a wide variety of purposes such as floodplain impacts, setbacks, impervious lot coverage, nonconforming uses, etc. We can assist with these services either as stand-alone services, or as part of an overall subdivision and/or land development plan. We also help with the preparation of conditional use applications. We will prepare the required applications for zoning approval and attend the hearing to represent the application on your behalf.

Site Feasibility Analysis

We can assist with the evaluation of a site’s potential for whatever use a client is interested in pursuing. We research the requirements of the zoning, subdivision/land development, stormwater management, driveway and other municipal ordinances, DEP/NPDES requirements, sewer and water feasibility, as well as potential restraints on development such as topography, sight distance, geology, floodplain, wetlands, endangered species, etc.

Sewage Planning

We can help you evaluate the available methods of sewage disposal including public sewer, septic systems, holding tanks, denitrification, nutrient trading, etc. On your behalf, we can work with the PA Department of Environmental Protection to obtain sewage planning modules (or exemptions) for a wide variety of projects including agricultural, residential, commercial and industrial development.