Freehold, NJ Environmental Rules: Grading & Drainage (2026)

Grading and drainage in Monmouth County combine municipal, county, and state oversight. Municipal construction codes (NJ UCC, N.J.A.C. 5:23) require grading permits for significant earth moving — typical thresholds 50 to 100 cubic yards of cut or fill. Projects disturbing 5,000+ sq ft additionally need Freehold Soil Conservation District certification. NJ follows a modified reasonable-use rule for surface water drainage (Armstrong v. Francis Corp. (1956) and successor cases): upland owners cannot materially increase runoff to adjoining properties through grading changes. Drainage swales, French drains, catch basins, and underground detention may be required on new construction. Retaining walls exceeding 4 feet in height (measured from bottom of footing to top of wall) require NJ-licensed professional engineer design and separate building permit. Retaining walls in coastal zones require CAFRA review. Compaction testing required for structural fill. Final grade must match approved plans — reinspection required before certificate of occupancy. Post-construction drainage maintenance is property owner responsibility. Coastal Monmouth municipalities face additional grading scrutiny due to dune protection, flood elevation requirements, and sea level rise adaptation. Superstorm Sandy reconstruction permits in Sea Bright, Long Branch, and Monmouth Beach required extensive re-grading plans.