Allentown Floodplain, Engineering, and Right-of-Way Permit Guide

Allentown floodplain and engineering permits can affect fences, sheds, pools, driveways, sidewalks, curbs, excavations, encroachments, stormwater, and tree work.

Permit takeaway

Allentown says properties in the 100-year floodplain need a Floodplain Development Permit before building, repairing, or renovating buildings, fences, swimming pools, sheds, driveways, and similar work.

Zoning and placement

Floodplain repairs and renovations may need substantial improvement or substantial damage evaluation, while engineering permits handle encroachments, crossovers, excavations, sidewalks, curbs, driveways, stormwater connections, and shade tree work.

Building and trade review

Engineering permits are submitted through Public Works rather than the City Hall building permit counter, so right-of-way and street work may follow a separate process.

Call before applying when

Call before applying if the property is in a floodplain, floodway, sidewalk, curb, driveway, street, stormwater, tree, or public right-of-way condition.

Documents to prepare

• Floodplain Development Permit if applicable
• Engineering permit application
• Site plan
• Substantial improvement information if applicable
• Stormwater or tree information if applicable

Inspection planning

• Confirm floodplain status
• Submit engineering or floodplain permits to the correct office
• Coordinate inspections before covering work
• Keep floodplain and engineering records

Official sources

• Allentown Floodplain Management Program
• Allentown Engineering Permits
• Allentown Construction Permitting

This guide is a planning summary. Always verify the current requirements with the local office before starting work.