Permits That Can Apply to Land Clearing in Derry
Small yard clearings rarely need a permit. Larger projects in Derry should check these rules before the first tree comes down.
Alteration of Terrain. NHDES says an Alteration of Terrain permit (opens in a new tab) is required when a project disturbs more than 100,000 square feet, or 50,000 square feet if any part is in the protected shoreland, or when it disturbs slopes of 25% or steeper within 50 feet of surface water. The underlying law is RSA 485-A:17 (opens in a new tab).
Wetlands. RSA 482-A:3 (opens in a new tab) bars excavating, removing or filling in banks, marshes or swamps without a state permit. Locally, Derry's Wetlands Conservation Overlay District (opens in a new tab) adds its own limits, including a 150-foot buffer around prime wetlands.
Timber. If cut wood will be sold, RSA 79:10 (opens in a new tab) requires the owner to file a Notice of Intent to Cut with the local assessing officials before the cutting starts.
This is general guidance, not legal advice. Check with the Derry Planning Department and NHDES for your parcel. We will flag anything on the site that looks like a permit question.
Sources: NHDES: Alteration of Terrain Permitting; NH RSA 485-A:17 Terrain Alteration; NH RSA 482-A:3 Excavating and Dredging Permit; Town of Derry Code, Article X: Wetlands Conservation Overlay District; NH RSA 79:10 Notice of Intent to Cut
How Much Does Land Clearing Cost in Derry?
National reference ranges from HomeGuide (updated November 2025) put land clearing at $1,200 to $8,000 per acre. Light clearing runs about $1,200 to $2,500 per acre, heavily wooded land about $4,500 to $8,000 per acre, and stump removal during clearing about $100 to $400 per stump. These are national planning numbers, not our prices.
Every clearing job is quoted on site. If the goal is brush and small trees rather than a bare lot, compare with forestry mulching and our forestry mulching cost calculator.
What changes the price here
- How close the clearing limits come to wetlands or the prime wetland buffer
- Whether the project crosses the Alteration of Terrain square footage threshold
- Tree size and density, and whether any timber will be sold
- Number of stumps that must come out for a foundation, septic or driveway
- Hauling distance and volume of debris to remove
- Stone walls and boulders inside the work area
Cost references: HomeGuide: How Much Does It Cost to Clear Land?