October 2018 Market Report


 Key Takeaways:

  • October 2018 marks a full four years of falling inventory, specifically in the number of existing homes for sale in Ada County.
  •  This lack of inventory compared to demand is one of the primary reasons that the median sales price continues to rise compared to last year.
  •  The median sales price in October 2018 was $321,398, up 0.8% from the previous month and up 19.9% from October 2017.


October 2018 marks a full four years of falling inventory, specifically in the number of existing homes for sale in Ada County, when looking at activity by month year-over-year.

There were 870 existing homes for sale in Ada County in October 2018, down 15.0% from October 2017 and down 48.8% from October 2014 when the decline began.

As we’ve outlined in previous reports, there are many reasons the Boise Region is facing a lack of homes for sale. These include the continued population growth, the trend of people choosing to stay in their homes longer than we’ve seen historically, among others.

This persistent lack of existing home inventory is one of the two primary reasons that the area’s overall median sales price continues to rise compared to last year; the second reason, increasing land, labor, and material costs for new homes. For October 2018, this resulted in a median sales price of $321,398, up 0.8% from the previous month and up 19.9% from October 2017.

This nearly 20% increase year-over-year in the overall median sales price for October was primarily due to a higher share of new home sales during the month ― reaching 27.7% of all closed sales, up 10.1% compared to October 2017.

We’ve been talking about the drop in existing inventory literally for years now, but what’s interesting about today’s market is that we’re seeing more and more new construction sales. Whether you’re looking to buy an existing home or a new build, your REALTOR® is going to advocate for you throughout the transaction. And if you’re thinking of selling, these recent numbers indicate that despite the turn in temperature, it’s still a good time to put your home on the market.


In October 2018, 36 homes sold in Gem County, up 28.6% from October 2017. This left 57 new and existing/resale homes available for sale at the end of the month — down 19.7% from the same month last year. Despite persistently low inventory, Gem County has seen strong sales numbers for the last four months.

The median sales price for homes that sold in October was $199,450, based on activity over the past 12 months — up 11.1% over the same period last year. There are two primary reasons that the median sales price rose compared to last year — the lack of inventory compared to demand, and an increase in the share of new homes sales in October.

Five new homes sold in Gem County in October 2018, the same number as October 2017. However, new home sales made up a larger share of total sales at 11.1% in October, compared to the average of 5-6% we typically see in Gem County. New homes typically sell for higher prices than existing homes due to increased land, labor, and material costs, so when the share of new home sales increases, so does the median sales price.

Apparently, the colder temps haven’t deterred buyers in Gem County. If you’re thinking about selling, now is a great time to put your home on the market. Talk your REALTOR® to find out what your home may be worth and what options are available based on your specific situation.


Additional information about trends within the Boise Region, by price point, by existing and new construction, and by neighborhood, are now available here: Ada CountyGem County, and City Data Market Reports. Each includes an explanation of the metrics and notes on data sources and methodology.

ADA Snapshot - Oct 18

Gem Snapshot - Oct 18

Download the latest (print quality) market snapshot graphics for Ada CountyAda County Existing/ResaleAda County New Construction, and Gem County.

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This report is provided by Boise Regional REALTORS® (BRR), a 501(c)6 trade association, representing real estate professionals throughout the Boise region. Established in 1920, BRR is the largest local REALTOR® association in the state of Idaho, helping members achieve real estate success through ethics, professionalism, and connections. BRR has two wholly-owned subsidiaries, Intermountain MLS (IMLS) and the REALTORS® Community Foundation.

If you have questions about this report, please contact Cassie Zimmerman, Director of Communications for Boise Regional REALTORS®. If you are a consumer, please contact a REALTOR® to get the most current and accurate information specific to your situation.

The data reported is based primarily on the public statistics provided by the IMLS, available at: intermountainmls.com. These statistics are based upon information secured by the agent from the owner or their representative. The accuracy of this information, while deemed reliable, has not been verified and is not guaranteed. These statistics are not intended to represent the total number of properties sold in the counties or cities during the specified time period. The IMLS and BRR provide these statistics for purposes of general market analysis but make no representations as to past or future performance. The term “single-family homes” includes detached single-family homes with or without acreage, as classified in the IMLS. These numbers do not include activity for mobile homes, condominiums, townhomes, land, commercial, or multi-family properties (like apartment buildings).