Boise Housing Market Update: September 2026 | Home Prices, Micron Expansion & Treasure Valley Growth
Is the Boise housing market cooling, stabilizing, or preparing for another period of growth?
The August 2026 housing numbers reveal a market that's relatively steady on the surface, but increasingly different depending on where you're buying or selling.
Meanwhile, major developments across the Treasure Valley are making headlines. Micron's Boise semiconductor expansion is expected to create 17,000 jobs, Nampa has secured $23 million in federal infrastructure funding, and Middleton has broken ground on a $68 million wastewater treatment expansion.
Add uncertainty around mortgage rates, and there's quite a bit to unpack.
Let's look at the latest Boise real estate market statistics, what they mean for buyers and sellers, and the developments shaping the future of the Treasure Valley.
Boise Housing Market at a Glance: August 2026
According to Boise Regional REALTORS®, the August 2026 Ada County single-family housing market reported:
Market Indicator | August 2026 | Year-Over-Year Change |
Median Sales Price | $595,000 | +6.9% |
Homes Sold | 955 | +14.8% |
Pending Sales | 1,269 | +11.2% |
Available Homes | 1,979 | -10.6% |
Average Days on Market | 37 | -9.8% |
Months of Inventory | 2.4 | — |
Source: Boise Regional REALTORS®, August 2026 Ada County Market Report. Data from Intermountain MLS as of September 9, 2026.
The most important takeaway? The Boise housing market isn't behaving uniformly.
New construction, resale homes, established Boise neighborhoods, and growing communities like Meridian, Kuna, and Star are experiencing different conditions.
That distinction matters when making a real estate decision.
Boise Home Prices: Are Prices Going Down in 2026?
The median home sales price in Ada County reached $595,000 in August 2026, an increase of 6.9% compared with August 2025.
However, prices decreased 1.2% from July, a difference of approximately $6,000.
That's a relatively small monthly change.
The more interesting story appears when we separate resale homes from new construction.
Resale Home Prices vs. New Construction
Resale homes:
Median sales price: $579,900
Year-over-year change: +3.6%
Month-over-month change: -3.4%
New construction:
Median sales price: $629,000
Year-over-year change: +13.8%
Month-over-month change: +3.1%
New construction continues to occupy a higher median price point than resale homes.
However, this doesn't necessarily mean individual new homes have appreciated 13.8%. Median prices can also change depending on the types, sizes, and locations of homes sold.
Home age is another interesting factor.
Homes 20 years old or newer had median prices around $600,000 or higher, while homes older than 20 years were closer to $500,000.
What's Happening to Home Prices in Star, Idaho?
Star experienced a notable shift in August.
The city's median home price decreased by approximately $45,000, dropping below $500,000 for the first time since April.
Meanwhile, only three homes sold below $300,000 throughout Ada County in August. All three were located in Boise and experienced small price reductions before selling.
For buyers hoping to find a home below $300,000, these numbers illustrate how limited that segment of the local market remains.
Ada County Home Sales: Activity Is Leveling Off
Ada County recorded 955 closed home sales in August 2026.
That's a 14.8% increase compared with August 2025.
However, only nine additional homes sold compared with July, representing a month-over-month increase of just 0.8%.
Boise Regional REALTORS® suggests this could indicate that sales activity is beginning to level off after increasing earlier in the year.
Of those transactions:
658 were resale homes, up 17.9% year over year.
297 were new-construction homes, up 8.4% year over year.
Location also played an important role.
Meridian accounted for 39% of new homes sold and 41% of homes sold between one and ten years old.
Boise accounted for 75% of homes sold that were 31 years or older.
What This Means for People Moving to Boise
If you're relocating to the Treasure Valley, the type of home you prefer will influence which communities make the most sense to explore.
Buyers prioritizing newer construction may find more options in Meridian and surrounding growth areas.
Buyers interested in established neighborhoods, mature landscaping, and older architectural styles may find more inventory within Boise.
Neither option is inherently better. The right choice depends on your priorities, lifestyle, budget, and long-term plans.
Boise Housing Inventory: Nearly Half of Available Homes Are New Construction
At the end of August, Ada County had 1,979 homes available for sale.
Inventory increased only 0.2% from July and remained 10.6% below August 2025 levels.
But the breakdown is particularly interesting:
Resale inventory: 991 homes
New-construction inventory: 988 homes
That's almost an equal split between new and existing homes.
And the two categories are moving in opposite directions.
Resale inventory decreased 7.1% from July, while new-construction inventory increased 8.7%.
Why New Construction Inventory Matters
Builders may offer incentives that aren't always available from individual homeowners.
Depending on the builder, community, and financing terms, those incentives can include:
Mortgage interest rate buydowns
Closing-cost assistance
Design upgrades
Other purchase incentives
These incentives aren't guaranteed, and buyers should compare the complete financing terms rather than focusing exclusively on the advertised incentive.
Still, builder competition can create opportunities worth evaluating.
Much of Ada County's inventory growth occurred in Kuna and Meridian.
In Kuna, 62% of new homes available at the end of August were concentrated within just six neighborhoods.
This reinforces an important point: housing inventory is highly localized.
One neighborhood may offer substantial buyer choice while another has very little competing inventory.
How Long Does It Take to Sell a Home in Boise?
Homes across Ada County averaged 37 days on market in August 2026.
That's 9.8% fewer days than August 2025, but 8.8% more than July.
Resale homes averaged 30 days on market, while new-construction homes averaged 54 days.
Average Days on Market by City
City | Average Days on Market |
Boise | 22 |
Eagle | 40 |
Kuna | 41 |
Star | 47 |
Homes in Boise sold considerably faster on average than those in Eagle, Kuna, and Star.
One possible explanation is the concentration of new construction outside Boise, since newly built homes generally spend longer on the market.
Differences in buyer demand may also contribute.
For sellers, this is why citywide or countywide averages aren't enough to establish an effective pricing strategy.
A property's specific neighborhood, condition, price point, and competition all influence its market position.
Pending Sales and Months of Inventory: Is Boise a Buyer's Market?
At the end of August, Ada County recorded 1,269 pending sales.
Pending sales increased 11.2% year over year but decreased 8.2% compared with July.
Resale pending sales declined 10.2% month over month, while new-construction pending sales decreased 9.3%.
Nearly half of the homes pending at the end of August were expected to close in September.
Pending sales can provide an early indication of future closed-sale activity, making this an important metric to watch as the market transitions into fall.
Is the Boise Housing Market Balanced?
Ada County had 2.4 months of housing inventory in August.
Boise Regional REALTORS® defines a balanced market as approximately four to six months of inventory.
That means the overall market remains below the inventory level traditionally associated with balance.
However, buyers may still experience greater negotiating leverage in certain neighborhoods or new-construction communities.
The key is understanding the specific market segment—not relying on a broad buyer's-market or seller's-market label.
Mortgage Rates in 2026: Could the Federal Reserve Raise Rates?
Mortgage rates remain an important factor for buyers considering a move to Boise.
In late August, Federal Reserve Chairman Kevin Warsh indicated that an interest rate increase could be possible during the fall if inflation did not decline sufficiently.
Speaking in Jackson Hole, Wyoming, Warsh emphasized the Federal Reserve's priorities of price stability and maximum employment.
The July Personal Consumption Expenditures (PCE) inflation rate was reported at 3.7%, above the Fed's 2% inflation target.
Following the speech, market expectations for a September interest rate increase reportedly rose from 35% to 57%.
How Would Higher Interest Rates Affect Boise Homebuyers?
Higher borrowing costs can reduce purchasing power by increasing monthly mortgage payments.
However, the Federal Reserve does not directly set mortgage interest rates.
The Fed controls short-term interest rates, while mortgage rates respond to longer-term bond markets, inflation expectations, and anticipated monetary policy.
For buyers, this means a Federal Reserve rate increase does not automatically translate into an identical increase in mortgage rates.
Rather than attempting to predict the perfect time to buy, it can be more useful to evaluate current financing options, monthly payment comfort, and the specific property.
Source: Realtor.com, August 2026 Federal Reserve and Jackson Hole coverage.
Micron's Boise Expansion: 17,000 Expected Jobs
One of the most significant economic development stories in the Treasure Valley is Micron Technology's semiconductor expansion in Boise.
The project is underway and is expected to create 17,000 jobs, including approximately 3,500 direct technical positions.
Micron is also incorporating technician training facilities and local workforce development initiatives to help meet demand for skilled workers.
What Could Micron's Expansion Mean for Boise Real Estate?
Large employment investments can influence a region's long-term economy and housing demand.
However, the 17,000-job estimate should not be interpreted as 17,000 immediate new residents or homebuyers.
The projected impact includes different types of employment and will unfold over time.
The expansion is nevertheless an important development to monitor when evaluating the Treasure Valley's long-term economic landscape.
For buyers considering relocating to Boise, understanding the region's employment base and major development projects is one piece of the broader relocation picture.
Source: CNBC, August 20, 2026.
Middleton, Idaho: $68 Million Wastewater Treatment Expansion
The City of Middleton recently broke ground on a $68 million wastewater treatment plant expansion.
The project is designed to help the city meet regulatory water-quality standards and accommodate regional growth.
Construction is expected to take several years, generating temporary construction employment and creating longer-term demand for specialized municipal staff.
Why Infrastructure Matters for Treasure Valley Growth
Housing development depends on more than available land.
Water systems, wastewater capacity, transportation networks, and public infrastructure all play important roles in how communities accommodate growth.
For people considering moving to Middleton or other expanding Treasure Valley communities, infrastructure investment is worth understanding alongside housing availability and neighborhood development.
Source: KIVI-TV, 2026.
Nampa Receives $23 Million Federal Infrastructure Grant
The City of Nampa has been awarded a $23 million BUILD grant from the U.S. Department of Transportation.
The grant will support transportation and safety improvements, including:
Bridge widening
Road resurfacing
ADA-compliant sidewalk additions
New traffic lights
These projects reflect continued investment in the transportation infrastructure serving Nampa.
Combined with Middleton's wastewater expansion and Micron's Boise development, they illustrate the scale of investment taking place throughout the broader Treasure Valley.
Source: Idaho News, 2026.
What Does the September 2026 Boise Housing Market Mean for Buyers and Sellers?
The August numbers point toward a market that is relatively stable overall but increasingly segmented by location and property type.
For Buyers Relocating to Boise
Buyers should pay particular attention to the differences between resale and new construction.
With almost half of Ada County's available inventory consisting of new homes, comparing builder incentives, property characteristics, neighborhood amenities, and financing options can be valuable.
It's also important to look beyond broad market averages.
A home in Boise may face a different level of competition than a similarly priced property in Star or Kuna.
For Boise Home Sellers
Pricing strategy remains essential.
Although Ada County homes averaged 37 days on market, individual communities experienced substantially different selling timelines.
Understanding competing listings, recent comparable sales, property condition, and buyer expectations can help sellers make more informed decisions about pricing and presentation.
For Anyone Considering Moving to the Treasure Valley
The bigger picture extends beyond housing prices.
Major employment projects, infrastructure improvements, and continued residential development are shaping the region.
The goal isn't simply to find a house in Boise. It's to understand which community and property best support your lifestyle and long-term priorities.
Final Thoughts: A Steady Market With Important Differences
The September 2026 Boise housing market update reveals a few important trends:
Home prices and closed sales remained relatively stable from July to August. New-construction inventory increased while resale inventory declined. Pending sales slowed, and homes took slightly longer to sell.
Meanwhile, major investments in employment and infrastructure continue across the Treasure Valley.
The result is a market where local knowledge matters.
The right real estate decision isn't about timing the entire Boise housing market perfectly. It's about understanding the specific opportunities and tradeoffs relevant to your goals.
Planning a Move to Boise, Idaho?
If you're considering moving to Boise or relocating to the Treasure Valley, I have two resources designed to make the research process considerably easier.
If you're coming to Boise for a short visit before deciding where to live, my 48-Hour Boise Scouting Guide is designed to help you compare communities strategically rather than spending two days driving somewhat aimlessly around subdivisions.
If you'd like personalized guidance on buying, selling, or relocating to the Boise area, you can also reach out directly.
Sarah Breck | Real Broker
Boise & Treasure Valley Real Estate
208-918-0265
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