Prince George's County property record for 2800 Powder Mill Rd, Adelphi, MD 20783
| Property Type | Government Office, Courthouse |
|---|---|
| Details | 42,171 sqft · built 1977 |
| Lot Size | 136 acres (5,936,356 sqft) |
| Owner | Company Name on File |
| Tax Bill | $117,377 (2023) |
| Flood Zone | Zone X (minimal risk) |
| APN | 01-0070094 |
| Primary APN | 01-0070094 |
|---|---|
| Alternative APN |
|
| Stories | 1 Story |
|---|---|
| Building Area | 42,171 sqft Total Area |
| Fire Sprinklers | Fire Sprinklers |
| Year Built | Built 1977 |
|---|---|
| Exterior Material | Concrete |
| Construction Type | Steel Frame |
| Lot Area | 5,936,356 sqft (136 acres) |
| Cooling System | A/C Chilled Water |
|---|---|
| Heating System | Hot Water |
| Sewer | Connected |
| Account Number | 0070094 |
|---|---|
| Street Address | 2800 POWDER MILL RD |
| City | ADELPHI |
| State | MD |
| Zip | 20783-1138 |
| Property Category | Public Works |
| Property Type | Public Works > Government Office, Courthouse |
| Local Zoning Code | ROS |
| Legal Description | DEPT OF ARMY GAMMA RAY FACILITY HARRY DIAMOND LAB |
| Jurisdiction | PRINCE GEORGE'S MD |
| Township / Civil Division | 1, VANSVILLE |
| Census Block Group | 1 |
| Census Block | 1009 |
| Census Tract | 807304 |
Source: NPS National Register of Historic Places, as of August 1, 2026
| Historic District | Within the Naval Ordnance Laboratory listed 2025 · 43 contributing resources · NRIS 100011915 |
|---|
Federal listing alone does not restrict alterations; local historic district rules, which this data does not cover, may apply.
Source: Prince George's County assessment roll, as of July 1, 2023
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Company Name on File |
|---|---|
| Mailing Address | 18TH ST NW AT F ST NW, WASHINGTON, DC 20405-0001 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Deed Names | Verified Name on Deed |
|---|---|
| Record Updated | Jun 7, 2026 |
Source: Prince George's County assessment roll, as of July 1, 2023
| Type | Name |
|---|---|
| State | Maryland |
| County | Prince George's County |
| Unified School District | Prince George's County Public Schools (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2023 | $117,377.00 Additional exemption filed | $10,555,533 | $11,228,400 Land $3,431,200 Building $7,797,200 |
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 January 15, 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; lenders make the official flood determination.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 94% of the US · lower than 89% of Maryland |
|---|---|
| Wildfire Likelihood | Under 0.01% annual chance |
| Exposure | Direct burnable vegetation at the parcel |
Source: EPA Safe Drinking Water Information System, as of September 2026
| Water System | WASHINGTON SUBURBAN SANITARY COMMISSION serves 1,900,000 people · EPA ID MD0150005 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | May 2025 |
| Lead | Under 1 ppb (2018–2020) 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 1 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Verizon Fiber | 2,300 / 2,300 |
| Xfinity Cable | 2,000 / 250 |
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