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Major Development Definition

In the live source corpus, the major-development triggers are anchored to the definition in N.J.A.C. 7:8-1.2. That definition controls whether the project enters the full stormwater design-and-performance standards workflow.

Structured citation evidence for this page lives in the sibling claim manifest.

Regulatory Summary

The long-standing threshold triggers remain in place:

  • 1 acre or more of disturbance
  • 0.25 acre or more of regulated impervious surface

The current citations layer also resolves the 2026 additions that matter operationally:

  • 0.25 acre or more of regulated motor vehicle surface remains a trigger in the 2026 definition set
  • 0.25 acre or more of qualifying reconstruction is also part of the 2026 trigger structure

2026 Clarifications

The live evidence layer supports a narrower and more accurate summary than some of the older page text:

  • the classic 1 acre and 0.25 acre thresholds were retained
  • the 2026 definition package added the reconstruction trigger
  • the broader applicability analysis for phased or multi-part projects was clarified in the citations layer, but the threshold discussion should stay tied to the actual definition text

Engineering Interpretation

From a design-review perspective, the major-development definition is still the first gate:

  1. determine whether any of the definition triggers apply
  2. if they do, the project enters the Subchapter 5 stormwater standards
  3. if they do not, the project may still face local requirements, but not the full N.J.A.C. 7:8 major-development framework

BMP Implications

Once a project qualifies as a major development, the source-backed authored workflow moves immediately into:

Cross References