The typical owner-occupied home in Keystone is worth about $263,900, 3% above the South Dakota median of $257,400 and 21% below the national median of $332,700. The median household earns $64,702 a year, so the median home costs 4.1 times the median income (3.4 times for South Dakota). 70% of occupied homes here are lived in by their owners, and 31% of those owners still have a mortgage.
Keystone at a glance
| Keystone | South Dakota | U.S. | |
|---|---|---|---|
| Median home value | $263,900 | $257,400 | $332,700 |
| Median property tax paid per year | – | $2,724 | $3,119 |
| Median household income | $64,702 | $75,081 | $80,734 |
| Homes lived in by their owners | 70% | 69% | 65% |
| Owner homes with a mortgage | 31% | 54% | 61% |
| Median monthly costs, owners with a mortgage | $1,719 | $1,680 | $1,963 |
| Those costs as a share of the owners' income | 19.0% | 20.4% | 21.0% |
| Median rent | $546 | $946 | $1,413 |
| Rent as a share of renters' income | 21.3% | 25.9% | 30.6% |
| Median year homes were built | 1977 | 1980 | 1980 |
| Vacant homes | 53.9% | 10.5% | 10.1% |
| Population | 336 | 907,428 | 334,922,499 |
What a typical home costs per month in Keystone
At this week's average 30-year rate of 7.11%, buying the median Keystone home of $263,900 with 20% down costs about $1,772 a month, including property taxes and insurance. With an FHA loan and 3.5% down, it's about $2,212, because the loan is bigger and FHA adds mortgage insurance.
Lenders usually want housing costs under about 28% of gross income, which means an income of roughly $75,947 for the 20%-down payment. That payment is 33% of the median Keystone household income of $64,702; at that income and 20% down, the 28% guideline points to a home of about $225,000.
The median rent here is $546 a month, so owning the median home costs about $1,226 a month more than renting, before you count the equity you build and any tax benefits.
| Down payment | $52,780 |
|---|---|
| Loan amount | $211,120 |
| Principal and interest | $1,420 |
| Property taxes (1.10% a year) | $242 |
| Homeowners insurance (our estimate, 0.5% a year) | $110 |
| PMI | $0 |
| Total per month | $1,772 |
Change the numbers in the calculator
| Down payment | $9,236 |
|---|---|
| Loan amount | $259,120 |
| Principal and interest | $1,743 |
| Property taxes (1.10% a year) | $242 |
| Homeowners insurance (our estimate, 0.5% a year) | $110 |
| FHA mortgage insurance | $117 |
| Total per month | $2,212 |
Change the numbers in the calculator
Questions about home buying in Keystone
What is the median home value in Keystone?
About $263,900 for owner-occupied homes, according to the Census Bureau's 2020–2024 American Community Survey.
What income do you need to buy a home in Keystone?
For the median home with 20% down at 7.11%, the payment is about $1,772 a month. Keeping that under 28% of gross income takes about $75,947 a year.
More about Keystone
- Mortgage Refinance in Keystone
- Debt Relief in Keystone
- Home Equity Loans in Keystone
- Guides and quotes for mortgage refinance on our sister site, MortgageRefinance.com
Sources: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates; Freddie Mac Primary Mortgage Market Survey, week of November 12, 2026. Estimates for small places have wide margins of error. About our data