Need a site plan or a stormwater design in Dauphin County, PA? Dauphin County has about 293,029 residents (2024 estimate) and 17 incorporated cities and towns. Describe your project once: licensed civil engineers who work in Dauphin County get back to you.
Site plan review in Dauphin County is handled by each city, or by the county in unincorporated areas.
Services available in Dauphin County
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Site plan, grading and utilities
Civil site plan with grading, utilities and access, sealed by a licensed engineer for the permit.
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Stormwater and drainage design
Drainage calculations and stormwater management design required by the city, county or state.
Frequently asked questions in Dauphin County
Do licensed civil engineers cover the whole of Dauphin County?
Most pros work across the county and neighboring counties. Enter your ZIP code in the form and we match you with pros who serve your exact area.
Civil Engineering Site Plans in Pennsylvania: all counties
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2024) and Gazetteer Files (public domain), imported on 10/31/2026. Figures describe the incorporated place or county as published; they are shown for information only.