Housing in Keystone

Keystone's housing market carries a real, disclosed cross-source spread this record does not resolve to one confident number, consistent with a genuinely thin small-town market.

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A real, disclosed cross-source spread

One cited 2024 estimate put Keystone's median house/condo value at $315,161 (this record's displayed figure); a separate, meaningfully lower cited figure ran $243,600.

A genuinely thin market

Keystone's genuinely tiny housing stock (a town of a few hundred residents) means a handful of transactions can meaningfully move a reported median -- this record treats both cited figures with appropriate caution.

Close to the statewide average

Both cited Keystone figures sit close to South Dakota's own ~$319,894 statewide average home value, rather than clearly diverging from it in either direction.

Key takeaways

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Last reviewed: 2026-08-28. Independent research; not financial, tax, or legal advice -- confirm current figures with a local professional before making a decision.