Index change and building permits for the year, with every county.
In 2015 the FHFA house price index for Montana changed +3.4%, against +4.4% for the United States and +4.9% in 2014.
4,826 housing units were authorised by building permits in the state that year (2,992 single-family), +24.3% on 2014; the national total was 1,182,582.
+3.4%Montana index, 2014–2015US +4.4%
4,826housing units permitted in 20152,992 single-family
32 of 42counties with a rising indexmedian county +3.2%
Ranked by the county index change from 2014 to 2015 (FHFA annual county index). Permits are units authorised in 2015; per 1,000 uses the vintage 2025 population.
Housing units authorised in Montana by yearsingle-family2+ unit buildings
Source: Federal Housing Finance Agency annual state and county house price indexes (updated March 31, 2026); Census Bureau Building Permits Survey annual state and county files. Public domain. Methodology.