What you need before you move dirt in New Jersey
New Jersey spreads this across five agencies. An erosion plan comes from your county Soil Conservation District, stormwater from NJDEP rules through your town, a sewer extension from NJDEP directly, septic from your local health department, and the rules about who may haul your dirt away from somewhere else entirely. Here is all of it in one table, with the number that actually triggers each one, who decides, and the exclusions that get left out when somebody tells you that you need a permit you do not need.
| What triggers it | The threshold | Who decides |
|---|---|---|
| Disturbing soil, almost any project | More than 5,000 sq ft of disturbance, about an eighth of an acre Two exclusions are in the statute: clearing or grading for agricultural or horticultural purposes, and construction of a single-family dwelling that is not part of a subdivision, site plan, conditional use, zoning variance, planned development, or a permit application covering two or more dwellings. Disturbance is defined broadly and takes in stockpiles, drainage work and machine access tracks. | Your county Soil Conservation District certifies the plan and has 30 days to grant or deny |
| Stormwater management (“major development”) | At least 1 acre disturbed, OR at least 0.25 acres of regulated impervious surface, OR 0.25 acres of regulated motor vehicle surface, or a combination reaching 0.25 acres Lot size is not the test. Reconstruction counts: the runoff quality standards apply where a major development increases OR reconstructs a quarter acre or more of motor vehicle surface. A quarter acre is about 10,890 sq ft, which a long driveway reaches easily. | NJDEP rules at N.J.A.C. 7:8, administered through your municipal review |
| Working inside the Highlands region | 88 municipalities across Bergen, Hunterdon, Morris, Passaic, Somerset, Sussex and Warren. Roughly 398,000 acres are the stricter Preservation Area, where disturbing an acre or more can be Major Highlands Development That county list is every county we work in, so in our territory this is a routine check rather than an edge case. | NJDEP enters the approval path in the Preservation Area |
| Wet ground anywhere near the work | Freshwater wetlands transition areas extend up to 150 feet beyond the wetland itself Excavating, filling and grading inside a transition area are regulated. Identify wet ground before a machine is booked, not after. | NJDEP |
| Extending or building sanitary sewer | Any sewer main, extension, interceptor, pump station or force main The engineer's report must be signed and sealed by a NJ Licensed Professional Engineer, plans and specs must be final, and hard copies with original wet-ink signatures and raised seals are required. Consent-form signatures more than a year old make the application deficient. | NJDEP, through a Treatment Works Approval under N.J.A.C. 7:14A-22 and 23. This is a STATE permit, not a town permit |
| Sending new flow to a treatment plant | The Capacity Assurance Program engages at 95% of permitted flow on a 12-month average; a moratorium can be imposed when existing plus allocated flows reach 100% NJDEP publishes each municipal plant's average flow as a percentage of permitted flow, so you can check before you buy the parcel. The exemption route is form WFR-001, and the exemption approval is itself a required item in the TWA package, so it comes first. | NJDEP. A sewer connection ban applies to the whole area served by the affected plant |
| How deep sewer pipe sits | At least 3 feet below finished grade, measured to the top of the pipe, for sewers, force mains and laterals The plumbing subcode separately sets 24 inches of cover over a building sewer. Real depth is usually set by the main you have to reach and the slope needed to get there. | N.J.A.C. 7:14A-23.6 |
| Septic systems | Systems handling 2,000 gallons a day or less, under N.J.A.C. 7:9A A cesspool must be replaced at the time of a real property transfer, and since 2012-04-02 adding a septic tank in front of one is not allowed. But seepage pits and older systems that simply do not meet current standards are NOT required to be upgraded. | Your LOCAL health department, municipal in some towns and county in others. NJDEP only enters where a design cannot meet the standard, through a Treatment Works Approval |
| Hauling excavated soil off site | Soil and fill recycling services require an A-901 license or a Soil and Fill Recycling Registration NJDEP reads the law as having NO self-generator exemption, so a contractor hauling dirt it dug itself is not automatically outside it. Virgin quarry products are excluded; excavated site soil is not. Worth asking any hauler about. | NJDEP, under P.L. 2019 c.397, the Dirty Dirt Law |
| Lead or galvanized water service lines | All lead service lines removed within 10 years of the 2021 law, meaning by July 2031; all service lines identified by then A galvanized service line is legally a lead service line under N.J.S.A. 58:12A-41. Who pays turns on ownership: investor-owned systems spread the cost across all customers via the BPU rate base, while government-owned systems may spread it OR assess it to the property. Post-1987 pipe cannot be assumed non-lead. | Your water system, overseen by NJDEP. Inventories are due 10 July annually and consumer notices follow 30 days later |
| Fire service lines and private fire mains | Designed, installed and tested to NFPA 24; the backflow device must be one approved for fire-protection service A domestic-service backflow assembly is not interchangeable, the device must not reduce the effectiveness of the fire protection system, and testing must be by a holder of a valid NJ backflow prevention device tester certificate. | Your local fire protection subcode official, plus NJDEP for the physical connection under N.J.A.C. 7:10-10 |
| Every dig, without exception | Call 811 for a mark-out before the work, typically about three business days ahead Free, required, and separate from any permit. Emergencies move faster under the emergency provisions. | New Jersey One Call |
The three that catch people most
The erosion threshold is lower than everyone expects. Five thousand square feet is about 70 feet by 70. Most real jobs cross it several times over, and disturbance counts stockpiles and the tracks the machines cut getting to the work, not just the area you pictured.
A sewer extension is a state permit. People assume the town issues it because the town issues everything else. It is a Treatment Works Approval from NJDEP, on paper, with wet ink and a raised seal, and it belongs at the front of the schedule rather than the end.
Who decides is more often wrong than what the number is. Septic is your local health department, not Trenton. Erosion is your county Soil Conservation District, not the town. Sewer mains are NJDEP, not the town. Getting that wrong costs weeks before anyone has told you no.
We keep a separate page listing all 13 NJ Soil Conservation Districts and the counties they cover, because thirteen districts over twenty-one counties is not something you can work out from your county name.
Go deeper on any of these
- Do I need a permit to clear land in New Jersey? The erosion threshold, the two statutory exclusions, and what counts as disturbance.
- Treatment Works Approvals for sewer extensions. The categories, the checklist and the wet-ink requirement.
- Sewer bans and plant capacity. The 95 percent early warning NJDEP publishes, and how allocated flow disappears before it is built.
- The water line survey letter. What your town is asking, why galvanized counts, and who pays for your half.
- What excavation costs, and why New Jersey is different. Including who is allowed to haul your dirt.
This is general information, not a permitting opinion for your project, and rules change. Every threshold above links to the state source it came from, and your county Soil Conservation District, your local health department, your municipality and NJDEP have the final say for your address. We publish it because we get asked on nearly every job that moves real dirt.
Moving dirt in northern New Jersey?
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