New Hampshire Oil Tank Removal: Costs, Rules & Contractors (2026)

Average Oil Tank Removal Cost in New Hampshire

Costs in New Hampshire are comparable to the broader New England region:

New Hampshire DES Regulations

The NH Department of Environmental Services (DES) regulates underground storage tank removal under Env-Or 400 rules. Key requirements:

• Licensed contractor required — All UST removals must be performed by a DES-licensed contractor.
• Notification required — Contractors must notify DES before beginning UST removal.
• Soil sampling required — Samples must be taken at the tank pit to screen for petroleum contamination.
• Closure report — Contractors must submit a closure report to DES within 90 days.
• Above-ground tanks — Residential heating oil tanks under 1,100 gallons are generally exempt from UST regulations but still require proper disposal.

NH Cities We Cover

The Removal Process Step by Step

1. 1
   Site Assessment: A licensed contractor evaluates tank size, location, access, and contamination risk.
2. 2
   DES Notification: Your contractor files the required pre-removal notification with NH DES.
3. 3
   Tank Pumping: Remaining oil is pumped and properly disposed of.
4. 4
   Excavation: Underground tanks are excavated based on depth and access.
5. 5
   Tank Removal: The tank is cleaned and removed. Above-ground tanks are cut into sections if needed.
6. 6
   Soil Sampling: Lab samples are taken from the tank pit. Results take 1–2 weeks.
7. 7
   Backfill and Restoration: The pit is backfilled and the surface restored.
8. 8
   Closure Report: Contractor submits the DES closure report. Keep it for home sale disclosures.

Selling a Home With an Oil Tank in NH

NH real estate transactions frequently stall over oil tanks. If you are selling and have an underground tank, remove it before listing. Have the DES closure report ready for buyers and their attorneys.

Many NH real estate attorneys require a clean closure letter as a condition of sale. Do not let it become a last-minute issue.