Unicoi County property record for 510 Holston Ave, Erwin, TN 37650
| Property Type | Single Family Home |
|---|---|
| Details | 1 ba · 1,196 sqft · built 1918 |
| Lot Size | 0.115 acres (5,027 sqft) |
| Owner | 2 Individual Names on File |
| Tax Bill | $467 (2024) |
| Deeds & Mortgages | Mar 2026 Construction Loan |
| Flood Zone | Zone X (minimal risk) |
| APN | 031F-F-012.00 |
| Primary APN | 031F-F-012.00 |
|---|---|
| Alternative APNs |
|
| Full Baths | 1 Bath |
|---|---|
| Plumbing Fixtures | 3 Plumbing Fixtures |
| Stories | 1 Story |
| Building Area | 1,196 sqft Living Area |
| 1st Floor Area | 1,196 sqft |
| Flooring | Carpet |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1918 |
|---|---|
| Effective Year Built | Effective 1986 |
| Architectural Style | Custom Design |
| Exterior Material | Siding |
| Roof Type | Gable/Hip |
| Roof Material | Metal |
| Lot Area | 5,027 sqft (0.115 acres) |
| Lot Dimensions | 125 ft deep x 40 ft wide |
| Deck Area | 80 sqft |
| Patio Area | 65 sqft |
| Canopy | 65 sqft |
| Cooling System | HVAC |
|---|---|
| Heating System | Heat Pump |
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 510 HOLSTON AVE |
|---|---|
| City | ERWIN |
| State | TN |
| Zip | 37650-2108 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | B-2 |
| Legal Description | TWIN OAKS LOT 18 40X125 JOINT TENANTS W/RIGHT OF SURVIVORSHIP |
| Legal Subdivision | TWIN OAKS |
| Legal Lot Number | 18 |
| Jurisdiction | UNICOI TN |
| Township / Civil Division | 2 |
| Census Block Group | 1 |
| Census Block | 1041 |
| Census Tract | 80400 |
510 Holston Ave is owned and occupied by two individuals who acquired it in November 2024.
Source: Unicoi County records, as of March 25, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 510 HOLSTON AVE, ERWIN, TN 37650-2108 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
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 |
|---|---|
| Last Transfer Date | Nov 6, 2024 |
| Transfer Doc | 0000486413 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | UNICOI TN |
| Property Address | 510 HOLSTON AVE, ERWIN, TN 37650-2108 |
| Transaction Type | Mortgage |
| Record Updated | Mar 11, 2026 |
| Name | Verified Name |
|---|---|
| Address | 510 HOLSON AVENUE, ERWIN, TN 37650-2108 |
| Document Number | 0000501248 |
|---|---|
| Date | Mar 2, 2026 |
| Book Page | 501/248 |
| Instrument | 26000452 |
| Name | UNICOI COUNTY |
|---|---|
| Type | Government Agency |
| Type | Construction Mortgage |
|---|---|
| Amount | Amount on Record |
Source: Unicoi County assessment roll, as of December 3, 2025
| Type | Name |
|---|---|
| State | Tennessee |
| County | Unicoi County |
| Municipality | Erwin Town |
| Unified School District | Unicoi County School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $17,900 Land $1,875 Building $16,025 | $71,600 Land $7,500 Building $64,100 | |
| 2024 | $467.00 | ||
| 2023 | $17,900 (-) Land $1,875 Building $16,025 | ||
| 2022 | $421.00 | $17,900 Land $1,875 Building $16,025 | $71,600 Land $7,500 Building $64,100 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 510 Holston Ave 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 August 23, 2016 · 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 |
| Flood Insurance Cost | Premium on File median of 44 policies |
| Nearby Flood Policies | 44 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 510 Holston Ave 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 72% of Tennessee |
|---|---|
| Wildfire Likelihood | 0.01% annual chance |
| Exposure | Indirect within ember reach |
| Adjoins Burnable Land | Yes |
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 | ERWIN UTILITIES AUTHORITY serves 12,478 people · EPA ID TN0000231 |
|---|---|
| Water Source | Groundwater influenced by surface water |
| Last State Inspection | Feb 2023 |
| Lead | Under 1 ppb (2023–2025) 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 281 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Brightspeed Fiber | 2,000 / 2,000 |
| Xfinity Cable | 1,200 / 35 |
| Erwin Fiber Fiber | 1,000 / 1,000 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: Point Broadband.
Search by:
By searching, you agree to: Terms • Privacy • Disclosures