Market Overview
Home Prices in Keystone, SD
The median home value in Keystone, SD is $638,623 as of mid-2026, according to Zillow's Home Value Index (ZHVI).That's up 1.1% compared to a year ago and up 2.5% from two years prior.
Compared to the U.S. national median of $410,000, homes in Keystone are priced56% above average. Keystone is part of the Rapid City, SD metro area.
Over the past five years, Keystone home values have risen by approximately36.1%, reflecting strong long-term appreciation in this market.
Price History
Keystone Home Price Trend
City Comparison
Keystone vs. National Median
At $638,623, homes in Keystone cost 56% above the national median of $410,000. Buyers in Keystone should expect to pay a premium compared to most U.S. markets.
Affordability
What Does It Cost to Buy in Keystone?
20% Down Payment
$127,725
on $638,623
Monthly P&I
$3,331/mo
30-yr @ 6.8%
Total Monthly Est.
~$4,230/mo
incl. taxes & insurance
Income Needed
$169,200
gross annual (30% rule)
10% Down Option
$63,862
+ PMI applies
Loan Amount (20% dn)
$510,898
at current rates
Estimates assume a 30-year fixed mortgage at 6.8%. Monthly total includes estimated property taxes and homeowner's insurance. Actual costs vary.
FAQ
Frequently Asked Questions
What is the average home price in Keystone, SD?
The median home value in Keystone is $638,623 as of mid-2026, according to Zillow's Home Value Index (ZHVI). That's up 1.1% year-over-year.
How much have home prices changed in Keystone?
Over the past year, home values in Keystone have increased by 1.1%. Over five years, prices have risen approximately 36.1%.
How much do I need to earn to buy a home in Keystone?
To comfortably afford the median home price of $638,623 with a 20% down payment ($127,725) at today's rates (6.8%), you'd need a gross annual income of approximately $169,200. This assumes keeping total housing costs at or below 30% of gross income.
How does Keystone compare to the national average home price?
The national median home value is approximately $410,000. At $638,623, homes in Keystone are 56% above the national average.
What metro area is Keystone part of?
Keystone is part of the Rapid City, SD metropolitan area. Home prices and market conditions can vary across the broader metro region.