If your property is inside Williston Park city limits, your permit application goes to Williston Park Building Department, not the Nassau County Building Department. Properties just outside city limits typically fall under county or township jurisdiction. If you're not sure which applies to your parcel, check with your local assessor's office or look up your property on Nassau County's GIS map. We include a full engineered plan set with every kit that meets what both city and county departments typically ask for — so either way, you're covered.

