Grading, Stormwater (NPDES) & Building Permits

Approvals get you the right to build; permits let you actually start.

Common permits

• Grading / land-disturbance permit — to move dirt; requires an approved grading and erosion-control plan.
• Stormwater / NPDES permit — for projects disturbing (typically) 1+ acre, a federal Clean Water Act program (administered by states) requiring a Stormwater Pollution Prevention Plan (SWPPP) and erosion/sediment controls.
• Utility / right-of-way permits — to connect water, sewer, and to work in public streets.
• Building permit — to construct vertical improvements, issued after construction-document review.

Sequencing

Permits come in an order: you usually can't pull a building permit until the site/civil work is approved and sometimes underway. Map the permit sequence into your schedule — permitting delays are one of the most common reasons projects slip.

Going Deeper (Intermediate)

Beyond zoning you need engineering and construction permits: a grading permit (earthwork), a stormwater/drainage permit, building permits, and utility/encroachment permits — each with its own agency review.

Advanced / Pro-Level

The permit critical path:

• Sequence: entitlement → improvement (civil) plans → grading + SWPPP → building permits.
• NPDES/SWPPP is required for sites ≥ 1 acre of disturbance (EPA/state).
• The grading permit ties to approved civil plans; building permits follow site work.
• Impact/development fees are typically due at permit issuance (and can be large).
• Plan-check cycles take months and run in series — agency review time is one of the biggest schedule risks a developer carries.

Practice Challenge

A developer budgets 4 weeks for permits and is shocked when grading and building plan-check take 6 months. What did they misjudge? (Answer: the agency plan-review critical path — entitlement, civil/grading, SWPPP, and building permits review in sequence over months; permit timelines (and the carrying cost of that time) are a major schedule risk that must be realistically built into the pro forma.)

In Practice

A developer can't pull a building permit because the grading and stormwater permits aren't done — the sequence stops them cold. Map the permit order into the schedule.

Common Mistakes to Avoid

• Not sequencing permits correctly
• Underestimating permitting time
• Disturbing land without the required permits

Takeaway: Map the permit sequence into your schedule; permitting delays slip projects.

Educational content — not legal, engineering, or financial advice. Requirements vary by jurisdiction; always confirm with the local authority and your professional team.