Pennington County property record for 13639 Hwy 40, Keystone, SD 57751
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 3 ba · 1,521 sqft · built 2002 |
| Lot Size | 11.4 acres (497,455 sqft) |
| Owner | Company Name on File |
| Tax Bill | $13,820 (2025) |
| Flood Zone | Zone A (high risk) |
| APN | 71-19-101-008 |
| Primary APN | 71-19-101-008 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 3 Baths |
| Building Area | 1,521 sqft Living Area |
| Basement Area | 1,001 sqft |
| Finished Basement | 900 sqft |
| Year Built | Built 2002 |
|---|---|
| Effective Year Built | Effective 2002 |
| Architectural Style | Ranch |
| Construction Type | Log |
| Lot Area | 497,455 sqft (11.4 acres) |
| Porch | Slab |
|---|---|
| Porch Area | 1,248 sqft |
| Deck Area | 360 sqft |
| Patio Area | 1,248 sqft |
| Account Number | 53193 |
|---|---|
| Street Address | 13639 HIGHWAY 40 |
| City | KEYSTONE |
| State | SD |
| Zip | 57751-6605 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | HARRINGTON SUBD, TRACT B OF LOT 1 |
| Legal Subdivision | HARRINGTON SUBD |
| Legal Tract | B |
| Legal Lot Number | 1 |
| Jurisdiction | PENNINGTON SD |
| Township / Civil Division | MOUNT RUSHMORE |
| Census Block Group | 2 |
| Census Block | 2040 |
| Census Tract | 11005 |
13639 Hwy 40, a single family home, is owned by a company.
Source: Pennington County records, as of September 14, 2026
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Owner of Record | Company Name on File |
|---|---|
| Mailing Address | 29574 239TH ST, VIVIAN, SD 57576-5317 |
| Owner Type | Company |
| Vesting | Company |
| Deed Names | Name on Deed |
|---|---|
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 13639 Hwy 40 was $13,820.
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 | $1,105,500 (-) Land $265,900 Building $839,600 | |
| 2025 | $13,820.00 | $1,105,500 Land $265,900 Building $839,600 |
| 2023 | $12,835.00 (+13.64%) | $972,200 Land $242,400 Building $729,800 |
| 2022 | $11,294.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 13639 Hwy 40 in Zone A, a high-risk flood area; flood insurance is required for federally backed loans.
Source: FEMA National Flood Hazard Layer, effective June 11, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone A high risk |
|---|---|
| 100-Year Floodplain | Yes 1% annual chance |
| Floodway | No |
| Base Flood Elevation | Not determined for this zone |
| Flood Insurance Requirement | Required federally backed loans |
| 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 13639 Hwy 40 is high, ranking above 78% of the US, with a 0.4% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | High above 78% of the US · above 89% of South Dakota |
|---|---|
| Wildfire Likelihood | 0.4% 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 |
5G and 4G LTE (outdoors only)
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