Permits through August 2026Yearly permits since 1995Silver Bow County index 1991–2025
Silver Bow County (100 = first year)United States, rebased to the same startNBER recession
House prices are indexed by county, not by city: this is Silver Bow County's FHFA index, with the national index rebased to the same start.
Census Bureau notes: building permit figures cover new privately owned housing units authorised by permit-issuing places; permits do not mean the units were started or completed, and places that report less often than monthly are imputed in monthly totals. FHFA notes: The FHFA HPI is a broad measure of the movement of single-family house prices. The FHFA HPI is a weighted, repeat-sales index, meaning that it measures average price changes in repeat sales or refinancings on the same properties.
Butte-Silver Bow, Montana (Silver Bow County), authorised 116 housing units through building permits in the 12 months to August 2026, +18.4% on the previous 12 months.
73 of those units were single-family houses (63%), 13 were in two- to four-unit buildings and 30 in buildings of five or more units. That is 3.3 units per 1,000 residents, close to the county's 3.2 and below the state's 4.8.
Since 1995 the place has authorised 2,812 units, with the busiest year 1997 (239 units). Silver Bow County's FHFA house price index rose +127.2% over the ten years to 2025.
116units permitted, 12 months to August 2026+18.4% on the previous 12 months
73single-family units63% of the total
30units in 5+ unit buildings26% of the total
3.3units per 1,000 residentsSilver Bow County 3.2 · Montana 4.8
Permits by month and structure type
Housing units authorised in Butte-Silver Bow by month, latest 24 monthssingle-family2+ unit buildings
Units, 12 months to August 2026
Butte-Silver Bow
Silver Bow County
Montana
United States
All housing units
116
116
5,457
1,418,086
Single-family (1 unit)
73 (63%)
73 (63%)
2,709 (50%)
888,241 (63%)
2 units
4
4
264
34,814
3–4 units
9
9
338
17,298
5 or more units
30 (26%)
30 (26%)
2,146 (39%)
477,733 (34%)
Units per 1,000 residents
3.3
3.2
4.8
4.1
Change on previous 12 months
+18.4%
+18.4%
+4.9%
−0.1%
Permits by year since 1995
Housing units authorised in Butte-Silver Bow by year, 1995–2025single-family2+ unit buildings
2,812 units since 1995; the busiest year was 1997. Annual figures include units imputed for months a place did not report.
Home prices in Silver Bow County
FHFA's index for Silver Bow County rose +127.2% over the ten years to 2025 (+8.6% a year) and +3.9% in the latest year, against +105.0% and +2.3% for Montana. Full county page: decade table, peak-to-low declines, every ZIP code and every permit-issuing place in the county.
Questions and answers
How many homes are being built in Butte-Silver Bow, MT?
116 housing units were authorised by building permits in the 12 months to August 2026, against 98 in the previous 12 months.
What kind of housing is being permitted in Butte-Silver Bow?
73 single-family units, 4 in two-unit buildings, 9 in three- and four-unit buildings and 30 in buildings of five or more units.
How does Butte-Silver Bow compare with its county and state?
3.3 units per 1,000 residents in Butte-Silver Bow, 3.2 in Silver Bow County and 4.8 in Montana.
How have home prices moved in Silver Bow County?
FHFA's index for Silver Bow County rose +127.2% over the ten years to 2025 and +3.9% in the latest year; the county page has the full series.
What does a permit count?
A housing unit authorised by a building permit for new privately owned residential construction, as reported to the Census Bureau Building Permits Survey by the permit-issuing office. Permits are not completions; some permitted units are never built, and places that report only annually are imputed in monthly figures.
Provenance
Permits: US Census Bureau, Building Permits Survey, place-level monthly and annual files through August 2026 (permit office 085000); county and state comparisons from the county and state files. Population: Census Bureau vintage 2025 estimates for incorporated places, matched on FIPS place code where the permit office is one. House price index: Federal Housing Finance Agency. Public domain. Corrections · Building Permits Survey.