Homes near the Animas River. Some properties along the river sit in mapped flood zones. If a home is in one, the lender will require flood insurance, so check the flood map before you make an offer.
Wildfire and insurance. Homes in forested areas can be harder or more expensive to insure, and the lender needs proof of homeowners insurance before closing. Get insurance quotes during your inspection period, not the week of closing.
Short-term rental rules. The City of Durango and La Plata County have different vacation rental rules. If rental income matters to you, check the rules for that address before you buy.
Wells and shared water. Homes in town are on city water; many county homes rely on wells or shared water systems, and lenders want those documented. My rural home guide covers what to order.