Pennington County property record for 13640 Hwy 40, Keystone, SD 57751
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 2 ba · 1,344 sqft · built 1987 |
| Lot Size | 5.16 acres (224,770 sqft) |
| Owner | 2 Individual Names on File |
| Tax Bill | $4,622 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 71-19-127-001 |
| Primary APN | 71-19-127-001 |
|---|---|
| Alternative APN |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 2 Baths |
| Building Area | 1,344 sqft Living Area |
| Year Built | Built 1987 |
|---|---|
| Effective Year Built | Effective 1987 |
| Architectural Style | Ranch |
| Lot Area | 224,770 sqft (5.16 acres) |
| Deck Area | 276 sqft |
| Account Number | 19660 |
|---|---|
| Street Address | 13640 HIGHWAY 40 |
| City | KEYSTONE |
| State | SD |
| Zip | 57751-6604 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | S19, T2S, R07E, BLACK HILLS MERIDIAN, S440' EXCLUDING THE E450' OF THAT PORTION OF LOT 5 LYING EAST OF HWY LESS HWY RTY |
| Legal Range | 07E |
| Legal Township | 02S |
| Legal Section | 19 |
| Legal Subdivision | BLACK HILLS MERIDIAN |
| Legal Lot Number | 5 |
| Jurisdiction | PENNINGTON SD |
| Township / Civil Division | MOUNT RUSHMORE |
| Census Block Group | 2 |
| Census Block | 2014 |
| Census Tract | 11005 |
13640 Hwy 40 is owned and occupied by two individuals.
Source: Pennington County records, as of September 14, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 13640 HIGHWAY 40, KEYSTONE, SD 57751-6604 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | 2 Names on Deed |
|---|---|
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 13640 Hwy 40 was $4,622.
Source: Pennington County assessment roll, as of September 14, 2026
| Type | Name |
|---|---|
| State | South Dakota |
| County | Pennington County |
| Unified School District | Custer School District 16-1 (PK - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $457,700 (-) Land $181,800 Building $275,900 | |
| 2025 | $4,622.00 | $457,700 Land $181,800 Building $275,900 |
| 2023 | $3,828.00 (+7.08%) | $366,600 Land $141,700 Building $224,900 |
| 2022 | $3,575.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 13640 Hwy 40 in Zone X, an area of minimal flood risk, within 500 ft of a high-risk flood zone.
Source: FEMA National Flood Hazard Layer, effective June 11, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Nearest Special Flood Hazard Area | Zone A, within 500 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Nearby Flood Policies | 1 in force |
Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.
Wildfire risk around 13640 Hwy 40 is high, ranking above 77% of the US, with a 0.5% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | High above 77% of the US · above 88% of South Dakota |
|---|---|
| Wildfire Likelihood | 0.5% annual chance |
| Exposure | Direct burnable vegetation |
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
Source: EPA Safe Drinking Water Information System, as of September 2026
| Water System | SOUTHERN BLACK HILLS WATER private · serves 947 people · EPA ID SD4602309 |
|---|---|
| Water Source | Groundwater |
| Last State Inspection | Mar 2026 |
| Lead | 2 ppb (2025) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | None last 3 years |
Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes.
Source: FCC Broadband Data Collection, based on 17 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| TSC Fiber | 1,000 / 1,000 |
4G LTE (outdoors only), no 5G reported
Search by:
By searching, you agree to: Terms • Privacy • Disclosures