Permit requirements for land clearing in Tennessee stack in layers — state, county, and sometimes city — and which layers actually apply to your project depends on acreage disturbed, location, and whether the work is agricultural or part of a construction project. Here’s the reasonably reliable version of what triggers what, current as of this writing; regulations do change, so confirm specifics with the relevant office before relying on this for a project already underway.
The State Baseline: TDEC’s One-Acre Threshold
Tennessee’s Department of Environment and Conservation requires a Construction General Permit (a stormwater/NPDES permit) for any project disturbing one acre or more of land through clearing, grading, or excavation — this applies statewide, in every county on this corridor. It also applies to projects disturbing less than one acre if that work is part of a larger common plan of development or sale that totals an acre or more over its life, which matters for a subdivision phase even if your individual lot is smaller.
Williamson County (Franklin, Thompson’s Station, Spring Hill)
Williamson County runs its own Land Disturbance Permit (LDP) program through its Engineering Department, layered on top of the state requirement. The county’s LDP remains valid for two years, and a storm water review and inspection fee (roughly $150 per lot for platted subdivision lots or projects exceeding one acre) applies at building permit application. The City of Franklin, notably, sets a stricter local threshold than the county or state: Franklin requires its own permit for projects disturbing as little as 5,000 square feet — well under an acre — and separately requires a tree-cutting permit for any commercial, industrial, or multi-family lot regardless of size, and for single-family lots larger than one acre. If your property sits inside Franklin’s city limits, assume the stricter city rule applies rather than the county or state threshold.
Maury County (Columbia, Mount Pleasant, and Spring Hill’s Maury side)
Maury County’s zoning resolution defines “development” broadly enough to include grading, excavating, filling, and similar land-disturbing activity, and the county administers its own Land Disturbance Permit process alongside the state NPDES requirement, similar in structure to Williamson County’s. Mount Pleasant, notably, points landowners toward the same Land Disturbance Permit and stormwater pollution prevention plan (SWPPP) process on its own city planning page, suggesting Mount Pleasant follows the county’s framework rather than layering its own stricter local rule the way Franklin does — though it’s worth confirming directly with the city if your project is sizable.
The Agricultural Exemption Worth Knowing
Maury County’s zoning resolution explicitly excludes routine agricultural activities — plowing, cultivating, and general gardening — from its definition of “development” requiring these permits. This matters directly for the Columbia and Mount Pleasant pasture-reclamation audience: clearing cedar and brush to return a field to active hay or grazing use, without associated grading, excavation, or construction, may not trigger the same permit requirement as clearing the same acreage for a new building pad. This isn’t a blanket exemption for all clearing on agricultural land, though — if the project also involves grading, a pond, or site prep for a structure, the acreage-based thresholds above still apply. Confirm your specific situation with the county before assuming an exemption applies.
Burn Permits: A Separate Layer Entirely
None of the above covers burning cleared debris, which runs on its own, unrelated permit system through the Tennessee Division of Forestry. A burn permit is required October 15 through May 15 each year for any open burning within 500 feet of forest, grassland, or woodland, obtained free through BurnSafeTN.org or by phone to the county forestry office; no permit is required outside that window, though local ordinances can still restrict burning regardless of season. Mount Pleasant layers its own additional requirement on top of the state permit: burning within city limits needs approval from the city and its fire department, and is restricted to daylight hours between sunrise and one hour before sunset. Forestry mulching sidesteps the entire burn-permit question, since it doesn’t involve burning debris at all.
What This Means Practically
For most residential-scale clearing on a lot under an acre outside Franklin’s city limits, you likely won’t trigger a Land Disturbance Permit, though a burn permit still applies if you’re burning debris in season. For anything approaching or exceeding an acre, or any project inside Franklin specifically, budget time for the permit process before scheduling clearing work — and if you’re clearing for agricultural reclamation without associated construction, ask specifically about the agricultural exemption rather than assuming the construction-focused thresholds apply.
Do I need a permit to clear less than an acre of my own property?
Often not, if the work isn’t part of a larger development plan and doesn’t involve grading or excavation triggering a county-level permit. Burn permits (if applicable) are separate and depend on the season, not acreage.
Is Franklin’s permit threshold really lower than the rest of Williamson County?
Yes — Franklin requires its own permit at 5,000 square feet of disturbance, well below the county and state’s one-acre threshold, plus a separate tree-cutting permit for larger single-family lots and any commercial or multi-family property.
Does clearing pasture for agricultural use require the same permit as clearing for a new house?
Not necessarily in Maury County, where routine agricultural activity is excluded from the permit-triggering definition of “development” — but this exemption doesn’t extend to associated grading, ponds, or construction site prep. Confirm your specific project with the county.
Where do I actually apply for these permits?
County-level Land Disturbance Permits go through each county’s Engineering Department; Franklin’s permits go through the city’s own Building & Neighborhood Services department; burn permits go through BurnSafeTN.org or your county Division of Forestry office.
