September's numbers for Ada County are in, and they're good news. I compared September 2026 with September 2025 using the latest Boise Regional REALTORS® data.
The short version: the Boise area is holding strong.
The big news for Ada County
- Prices are up in both markets. The new construction median rose 10.4%. The resale median rose 2.0%.
- Resale sales jumped 18.2%. That's even as resale homes for sale fell 16.2%.
- New builds are selling faster. They averaged 48 days on market, 18.6% quicker than last year.
September 2026 at a glance
| Ada County, Sept. 2026 | New construction | Existing / resale |
|---|---|---|
| Median sales price | $622,704 ▲ 10.4% | $561,065 ▲ 2.0% |
| Homes sold | 244 (▼ 10.0%) | 610 ▲ 18.2% |
| Days on market | 48 ▼ 18.6% | 35 (▲ 12.9%) |
| Homes for sale | 1,051 (▼ 0.2%) | 955 (▼ 16.2%) |
All changes compare September 2026 with September 2025.
The fuller picture
A fair update covers every number, not just the headlines.
- Fewer new homes sold. New construction sales fell 10.0%, to 244. The homes that did sell went faster and at higher prices.
- Resale homes took a little longer. Days on market rose 12.9%, to 35. That's still about five weeks.
- Resale choice is tighter. There were 955 resale homes for sale, down 16.2%.
- New construction supply held steady. There were 1,051 new homes for sale, nearly the same as last year.
One month of data can move with the mix of homes that sold. For the year-to-date view across Ada and Canyon County, see my August market update.
What this means for you
Resale buyers have fewer homes to choose from than a year ago, and more resale homes sold. Pricing right from day one still matters. See how I sell homes.
New construction offers the most choice, with over 1,000 homes for sale. They're selling faster, so be ready to act. Explore new construction.
Frequently asked questions
Are home prices going up in Boise?
Yes, year over year. In September 2026, the Ada County median sales price was $622,704 for new construction, up 10.4%, and $561,065 for resale homes, up 2.0%, compared with September 2025.
Are new construction homes selling faster in Ada County?
Yes. New construction homes averaged 48 days on market in September 2026, 18.6% faster than September 2025. Fewer new homes sold (244, down 10.0%), and homes for sale held about steady at 1,051.
Is resale inventory going down in Ada County?
Yes. There were 955 resale homes for sale in September 2026, down 16.2% from a year earlier, while resale sales rose 18.2% to 610.
Source: Boise Regional REALTORS® (boirealtors.com). Data from the Intermountain MLS as of October 8, 2026. Ada County, September 2026 vs. September 2025. Statistics reflect general market conditions, not the value of any specific home.
