Bergenfield vs Mahwah
How do retaining walls rules compare between Bergenfield, NJ and Mahwah, NJ?
Mahwah has fewer restrictions than Bergenfield.
Bergenfield, NJ
Bergen County
Bergenfield defines retaining walls and requires a Construction Official permit, plus an NJDEP permit, for any retaining wall within 20 feet of a stream, brook, or watercourse centerline.
View full Bergenfield rules →Mahwah, NJ
Bergen County
Mahwah caps accessory retaining walls behind the front facade at 6 feet and requires construction permits with engineering for taller residential walls.
View full Mahwah rules →Key Facts Comparison
| Fact | Bergenfield | Mahwah |
|---|---|---|
| Stream setback | 20 feet from centerline | - |
| Borough permit | Construction Official | - |
| State permit | NJDEP required | - |
| Application copies | Triplicate, owner-signed | - |
| Accessory wall max | - | 6 feet behind facade |
| Residential permit threshold | - | Over 4 feet |
| Residential fee | - | $75 over 4 feet |
| Commercial fee | - | $200 over 3 feet |
| Engineering required | - | Walls over 4 feet |
Highlighted rows indicate differences between cities.
Bergenfield FAQ
Do I need a permit for a small retaining wall in my yard?
Yes, applications must be filed in triplicate with the Construction Official. Walls within 20 feet of a stream centerline also require a New Jersey DEP permit before construction.
What materials are prohibited on retaining walls?
Bergenfield bans barbed wire, spines, chipped glass, or similar devices on any retaining wall. The wall must also conform to the Borough's drainage and grade-change definitions.
Mahwah FAQ
When do I need engineered plans for a retaining wall in Mahwah?
Engineered drawings are required for residential retaining walls over 4 feet measured from the bottom of the footing to the top, and for any wall supporting a surcharge load.
Do small landscape walls under 4 feet need any permit?
Walls under 4 feet near property lines typically still require a zoning or sitework permit from Mahwah, even though full construction permits may not apply.
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