Charleston County property record for 666 Williamson Dr, Mount Pleasant, SC 29464
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 1,709 sqft · built 1980 |
| Lot Size | 0.29 acres (12,632 sqft) |
| Owner | 2 Company Names on Record |
| Tax Bill | $1,480 (2025) |
| Flood Zone | Zone X (moderate risk) |
| APN | 517-04-00-172 |
| Primary APN | 517-04-00-172 |
|---|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Stories | 1 Story |
| Building Area | 1,709 sqft Living Area |
| 1st Floor Area | 1,709 sqft |
| Year Built | Built 1980 |
|---|---|
| Effective Year Built | Effective 1980 |
| Exterior Material | Wood Siding |
| Foundation Type | Slab (Mat/Raft) |
| Roof Type | Gable |
| Lot Area | 12,632 sqft (0.29 acres) |
| Lot Dimensions | 110 ft deep x 79 ft wide |
| Garage Type | Attached |
| Garage Area | 352 sqft |
| Parking Spaces | 1 Parking Space |
| Deck Area | 84 sqft |
| Patio Area | 410 sqft |
| Heating System | Heat Pump |
|---|
| Street Address | 666 WILLIAMSON DR |
|---|---|
| City | MOUNT PLEASANT |
| State | SC |
| Zip | 29464-3520 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | SUBDIVISION NAME -BAY TREE DESCRIPTION -LOT SF-7 |
| Legal Subdivision | BAY TREE |
| Legal Lot Number | S,F-7 |
| Jurisdiction | CHARLESTON SC |
| Township / Civil Division | MOUNT PLEASANT |
| Census Block Group | 3 |
| Census Block | 3006 |
| Census Tract | 4607 |
Source: Charleston County records, as of September 23, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Company Names on Record |
|---|---|
| Mailing Address | 666 WILLIAMSON DR, MOUNT PLEASANT, SC 29464-3520 |
| Owner Type | Company |
| Vesting | Life Tenant |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Transfer Date | Feb 25, 2025 |
| Transfer Doc | 0013090918 |
| Record Updated | Oct 29, 2026 |
Source: Charleston County assessment roll, as of August 1, 2025
| Type | Name |
|---|---|
| State | South Carolina |
| County | Charleston County |
| Municipality | Mount Pleasant Town |
| Unified School District | Charleston County School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $1,480.00 (+13.41%) | $403,944 (+3,252.23%) Land $270,925 Building $133,019 | $835,200 (+97.16%) Land $360,000 Building $475,200 |
| 2024 | $1,305.00 (+10.88%) | $12,050 (-) | |
| 2022 | $1,177.00 | $12,050 | $423,625 (-) Land $284,125 Building $139,500 |
| 2020 | $423,625 Land $284,125 Building $139,500 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
Source: FEMA National Flood Hazard Layer, effective September 9, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X moderate risk |
|---|---|
| 500-Year Floodplain | Yes 0.2% annual chance |
| Nearest Special Flood Hazard Area | Zone AE, within 100 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on Record median of 177 policies |
| Community Rating System | Class 5 (25% premium discount) |
| Nearby Flood Policies | 177 in force |
| Nearby Flood Claims | 89 (1982–2025) |
| Claims Outside the SFHA | 36 of 89 |
| Most Recent Claim | Jun 2025 · rainfall accumulation |
| Claims by Event |
|
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.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 98% of the US · lower than 99.4% of South Carolina |
|---|---|
| Wildfire Likelihood | 0.01% annual chance |
| Exposure | None beyond ember reach |
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 | MT PLEASANT WATERWORKS serves 91,500 people · EPA ID SC1010002 |
|---|---|
| Water Source | Purchased surface water from CHARLESTON WATER SYSTEM |
| Last State Inspection | Dec 2022 |
| Lead | 1 ppb (2024–2026) 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 328 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T DSL · Fiber in parts of the area | 100 / 20 |
May also be available: WOW Internet, Cable & Phone.
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