Costilla County presents a price-versus-cash-flow tension: the Zillow county median home value was $184,317 at the 2026-06 observation, down 7.75% year over year, but measured market rent is not published. Investigators who can verify lease evidence and flood exposure should examine it; buyers requiring demonstrated income coverage should be cautious. The price movement is Zillow’s value measure, not a closed-sale series, and no FHFA annual repeat-transaction HPI observation is supplied to corroborate or challenge its direction.
Carrying costs are partly visible. The effective property-tax rate is 0.32%, with median annual property tax of $582. HUD’s two-bedroom Fair Market Rent is $973 per month, but this is a payment standard rather than an estimate of market asking rent and cannot support a rent estimate. Without published market rent, gross yield cannot be computed, and the relationship between the county value measure, attainable rent, taxes and other operating costs remains untested.
Demand evidence is mixed and thin. QCEW’s 2025 annual average reports 924 covered jobs at county workplaces, down 3.95% from the prior annual average; its $821 average weekly wage applies to covered workers, not all households. Trade, transportation, and utilities is the largest disclosed private supersector, not a description of the whole economy. Tax-return migration showed a net inflow of 48 households, but incoming movers’ average AGI was $1,550 lower than outgoing movers’ average. Non-occupant investor mortgages represented 2.86% of purchase mortgages, one among 35 total; that is limited recorded investor participation, not proof that buyer competition is absent.
Risk limits require property-level work. The climate model estimates expected annual building-value loss of 0.13%, and inland flood is the dominant hazard; this is a county-level modeled loss ratio, not an insurance quote or a site-specific exposure finding. Realtor listing-market data are labeled 2026-06, but listing price, active inventory, marketing time and reduction data are not published, preventing a read on visible supply or seller concessions. Next checks are signed and asking rents, tax bills and assessments, flood-zone and loss history, insurance terms, property condition, and closed-sale comparables.