Ada County, ID real estate

What the numbers say

Ada County, ID real estate at a glance

By AstroCore · Realtor.com, US Census and Freddie Mac data

In September 2026, the median home in Ada County listed for $655,000, up 1.3% from a year earlier. That is 10% above the Idaho median of $593,000.

Homes spent a median of 44 days on the market, faster than 47 days a year ago. That makes Ada County the #1 fastest-selling of 6 Idaho counties we track.

Homeowners in Ada County pay a median of $2,655 a year in property taxes on a median home value of $512,300, an effective rate of about 0.52%. The Idaho average is 0.49%, which makes Ada County the #34 lowest-tax of 44 counties in the state with published tax data.

Renters pay a median of $1,577 a month, and $1,487 for a two-bedroom. At today's prices a typical home costs about 35 times a year's rent, which generally favors renting over buying in the short term.

With 20% down and today's 7.24% average 30-year rate, the monthly payment on a $655,000 home here comes to about $4,127 including property tax and insurance. Lenders typically want that to be under 28% of income, which works out to roughly $177,000 a year (the median household here earns $91,502).