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New Homes Permitted in Ada and Canyon Counties, 2010 to 2026

U.S. Census Bureau Building Permits Survey. Data covers 2010 to September 2026.

Compiled and reviewed by George Shvaya, Builder & RemodelerEditorial policyLast reviewed

Summary

Ada County authorized 5,221 new housing units in 2025 and Canyon County 3,929, according to the U.S. Census Bureau's Building Permits Survey. Ada is 30.3% below its 2021 peak; Canyon is 7.7% below its own. Together the two counties accounted for 51.0% of all housing units permitted in Idaho in 2025, up from 39.6% in 2010.

Key findings

  1. Ada County authorized 5,221 new housing units in 2025 (4,637 single-family, 56 in two-to-four-unit buildings and 528 in buildings of five or more units), with a combined permit valuation of $1.545 billion. Source [3]

  2. Ada County's permit peak since 2010 was 7,487 units in 2021; 2025 was 30.3% below that peak and about four times the 2010 low of 1,285. Our calculation from [4], [3], [5]

  3. Canyon County authorized 3,929 housing units in 2025, 7.7% below its 2021 peak of 4,257 and up from 360 in 2010. Our calculation from [3], [4], [5]

  4. Ada and Canyon counties together accounted for 51.0% of all housing units permitted in Idaho in 2025 (Ada 29.1%, Canyon 21.9%), up from 39.6% in 2010. Our calculation from [3], [6], [5], [8]

  5. From 2010 through 2025, Ada and Canyon counties authorized 113,938 housing units (Ada 77,476; Canyon 36,462), 53.2% of Idaho's 214,043. Our calculation from [1], [2]

  6. The Boise City metropolitan area authorized 9,438 housing units in 2025 valued at $2.405 billion, 22.6% below the 2021 peak of 12,196 units. Our calculation from [9], [10]

  7. Idaho authorized 17,944 housing units in 2025, 17.4% below the statewide peak of 21,732 in 2021. Our calculation from [6], [7]

  8. Through September 2026, on preliminary figures, Ada County authorized 4,707 housing units, 12.4% more than in the same nine months of 2025, while Canyon County authorized 2,702, down 11.5%. Our calculation from [11], [12]

Housing units authorized by year

New privately owned housing units authorized by building permits, 2010 to 2025, U.S. Census Bureau Building Permits SurveyOfficial source
YearAda CountyCanyon CountyBoise City metroIdahoAda + Canyon share of Idaho
20101,2853601,6934,15339.6%
20111,4533311,8403,81546.8%
20122,6318663,5566,26555.8%
20133,2811,0154,3658,11053.0%
20143,9681,1305,1838,79758.0%
20154,2411,1485,4999,95454.1%
20164,6971,8826,75812,16554.1%
20175,9421,8017,90914,18354.6%
20186,4062,2798,91715,82454.9%
20197,0483,32010,63217,71658.5%
20206,0603,3959,76219,13049.4%
20217,4874,25712,19621,73254.0%
20226,5303,59010,47518,70654.1%
20236,0893,5509,89117,91953.8%
20245,1373,6099,06317,63049.6%
20255,2213,9299,43817,94451.0%

The share column is our arithmetic: Ada plus Canyon units divided by Idaho units. The Boise City metropolitan area is Ada, Boise, Canyon, Gem and Owyhee counties.

January to September, 2025 against 2026

Housing units authorized, January to September year to date, preliminary, U.S. Census Bureau Building Permits SurveyOfficial source
AreaJan–Sep 2025Jan–Sep 2026Change
Ada County4,1874,707+12.4%
Canyon County3,0522,702-11.5%
Boise City metro area7,4497,647+2.7%
Idaho13,71014,576+6.3%

Year-to-date figures are preliminary and are revised when the annual file is published.

Methodology

  • Figures come from the Census Bureau's Building Permits Survey annual files for counties, metropolitan areas and states, 2010 through 2025, and the September 2026 and September 2025 year-to-date files.
  • County rows are Ada County (FIPS 16001) and Canyon County (FIPS 16027). The metropolitan row is the Boise City, ID metropolitan statistical area (CBSA 14260).
  • "Peak" means the highest year within 2010 to 2025. Earlier years were not pulled.
  • Percent changes, shares and multi-year sums are our arithmetic on the published figures.

Limitations

  • Permits authorize construction; they do not confirm a home was started or finished.
  • The survey imputes figures for permit offices that do not report, so small revisions are normal.
  • Valuation is the value stated on the permit, not the sale price or full cost of the home.
  • Year-to-date 2026 figures are preliminary.
  • This counts new housing units only. Remodeling permits are covered in the separate Boise remodeling permits study.

Sources

Each reference below is cited for a specific claim on this page. Codes, fees and product specifications change — confirm current requirements with the authority having jurisdiction before relying on them for a project decision.

Cite or reuse this research

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Suggested citation

Iron Crest Remodel. "New Homes Permitted in Ada and Canyon Counties, 2010 to 2026." Published November 12, 2026; reviewed November 12, 2026. https://ironcrestremodel.com/research/housing-market/treasure-valley-new-home-permits

Questions about the data, or need a figure checked before you publish? Email info@ironcrestremodel.com.

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