Montana · MCA 75-10-1305Montana meth and fentanyl contamination: written notice before the sale unless it was remediated
Montana's contamination law covers buildings used as a clandestine methamphetamine or fentanyl drug lab, or contaminated with hazardous chemical residues from consuming methamphetamine or fentanyl, that are occupied as a dwelling or business or may be sold or leased (MCA 75-10-1302(3)). An owner who knows the property was used or contaminated that way must notify any later purchaser or occupant in writing if it has not been remediated to the Department of Environmental Quality's standards by a certified contractor (MCA 75-10-1305(1)). Instead, the owner or agent may give notice that a certified contractor's documentation was submitted showing the property was remediated to the standard, or that it meets the standard without decontamination (75-10-1305(2)). Either notice must be given before the parties agree to the sale or lease (75-10-1305(3)). If the department has confirmed the standard is met and that notice was given, the owner and the owner's agent are not liable in an action by the person notified based on methamphetamine in the property (75-10-1305(4)).
What the statutes set
Covered property (75-10-1302(3))
A meth or fentanyl lab, or contamination from their consumption, in an occupied or saleable building.
Notice (75-10-1305(1))
Written notice to the buyer or occupant if not remediated by a certified contractor.
Timing (75-10-1305(3))
Before agreement to the sale or lease.
Immunity (75-10-1305(4))
After department-confirmed remediation and notice, owner and agent not liable.
What the TC checks on a Montana sale with a contamination history
- Ask whether the seller knows of meth or fentanyl production or contamination.
- If so, get the written notice, or the certified contractor's remediation documentation, signed before the buy-sell agreement.
- Keep the department's confirmation in the file.
Questions about Montana meth and fentanyl disclosure
Does Montana's disclosure law cover fentanyl?
Yes. It covers buildings used as a clandestine methamphetamine or fentanyl lab or contaminated from their consumption (MCA 75-10-1302(3), 75-10-1305(1)).
When must the Montana notice be given?
Before agreement to the sale or lease of the property (MCA 75-10-1305(3)).
Related guides
Track the contamination notice as a document on the deal in ClosingCode.
Start free trialSources: MCA 75-10-1302, 75-10-1303, 75-10-1305 (mca.legmt.gov), read November 1, 2026.
General information, not legal advice. ClosingCode is software; it is not a law firm or brokerage. This guide is not a substitute for the advice or services of an attorney.