Pennington County property record for 321 Platt St, Rapid City, SD 57702
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 1 ba · 988 sqft · built 1953 |
| Lot Size | 0.32 acres (13,939 sqft) |
| Owner | Individual Name on File |
| Tax Bill | $3,840 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 20-33-457-005 |
| Primary APN | 20-33-457-005 |
|---|---|
| Alternative APN |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 1 Bath |
| Building Area | 988 sqft Living Area |
| Basement Area | 988 sqft |
| Unfinished Basement | 988 sqft |
| Year Built | Built 1953 |
|---|---|
| Effective Year Built | Effective 1953 |
| Architectural Style | Ranch |
| Lot Area | 13,939 sqft (0.32 acres) |
| Garage Type | Attached |
| Garage Area | 480 sqft |
| Porch | Slab |
| Porch Area | 96 sqft |
| Patio Area | 30 sqft |
| Account Number | 30266 |
|---|---|
| Street Address | 321 PLATT ST |
| City | RAPID CITY |
| State | SD |
| Zip | 57702-2165 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | ROUNDS, C D, BLOCK 3, LOT 21 - 24 |
| Legal Subdivision | ROUNDS, C D |
| Legal Block | 3 |
| Legal Lot Number | 21-24 |
| Jurisdiction | PENNINGTON SD |
| Township / Civil Division | RAPID CITY |
| Census Block Group | 3 |
| Census Block | 3008 |
| Census Tract | 11200 |
321 Platt St is owned and occupied by an individual.
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 | Individual Name on File |
|---|---|
| Mailing Address | 321 PLATT ST, RAPID CITY, SD 57702-2165 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | Name on Deed |
|---|---|
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 321 Platt St was $3,840.
Source: Pennington County assessment roll, as of September 14, 2026
| Type | Name |
|---|---|
| State | South Dakota |
| County | Pennington County |
| Municipality | Rapid City |
| Unified School District | Rapid City School District 51-4 (PK - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $348,500 (-) Land $61,800 Building $286,700 | |
| 2025 | $3,840.00 | $348,500 Land $61,800 Building $286,700 |
| 2023 | $3,505.00 (+11.34%) | $305,500 Land $56,000 Building $249,500 |
| 2022 | $3,148.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 321 Platt St 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 AE, within 500 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Community Rating System | Class 7 (15% premium discount) |
| Nearby Flood Policies | 5 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 321 Platt St is low, with a 0.01% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 80% of the US · lower than 85% of South Dakota |
|---|---|
| Wildfire Likelihood | 0.01% 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 | RAPID CITY serves 72,009 people · EPA ID SD4600406 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | May 2024 |
| Lead | 6 ppb (2024) 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 471 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Midco Cable | 2,000 / 350 |
| Bluepeak Cable · Fiber in parts of the area | 1,000 / 30 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
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