SWPPP for building a single home in Tennessee

Building one house can still require a stormwater permit. Here is when, and the streamlined homebuilder path.

Building one house doesn't sound like it should require an environmental permit, but in Tennessee it often does. Here is when a single-family home needs a SWPPP and how to handle it without overpaying.

When a single home needs a SWPPP

A single-family lot triggers construction stormwater coverage when either:

• The lot itself disturbs one acre or more; or
• The lot is part of a common plan of development (like a subdivision) that disturbs an acre or more in total, even if your individual lot is smaller.

The second case is the common one: most subdivision lots are covered because the subdivision as a whole crosses the acre threshold.

The homebuilder path: CN-1249

For eligible at-grade single-family lots, TDEC provides a dedicated form, CN-1249, so you do not need a custom-engineered plan. It documents the erosion and sediment controls for the lot, includes a plat or site map, and is certified by the responsible parties.

What is involved

• Standard controls: silt fence, inlet protection, a stabilized construction exit, and stabilization of disturbed areas.
• A plat or site map showing the lot and control locations.
• Coverage under the state permit (SWPPP, and where applicable an NOI) plus any local requirements.
• Ongoing inspections while the lot is active.

When CN-1249 does not fit

If the lot involves mass grading, significant cut-and-fill, or engineered controls, the homebuilder form is not appropriate and you will need a full SWPPP and likely an engineer.

Cost and time

Instead of a consultant's fee and wait, SWPPP Builder generates a complete CN-1249 package for eligible lots in minutes for $99.