Montgomery County property record for 10509 Unity Ln, Potomac, MD 20854 · Last verified August 2026
| Property Type | Single Family Home |
|---|---|
| Details | 4 ba · 3,023 sqft · built 1978 |
| Lot Size | 2.26 acres (98,446 sqft) |
| Owner | Company Name on File |
| Last Sale | $800,000 (Oct 2003) |
| Tax Bill | $10,661 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 10-00857997 |
| Primary APN | 10-00857997 |
|---|---|
| Alternative APN |
|
| Full Baths | 4 Baths |
|---|---|
| Half Baths | 2 Half Baths |
| Stories | 1 Story |
| Building Area | 3,023 sqft Living Area |
| Gross Area | 3,647 sqft |
| 1st Floor Area | 2,062 sqft |
| Basement Area | 1,500 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1978 |
|---|---|
| Effective Year Built | Effective 1978 |
| Architectural Style | Multi-Level |
| Construction Type | Frame |
| Roof Material | Composition Shingle |
| Lot Area | 98,446 sqft |
| Garage Type | Attached |
| Garage Area | 624 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|---|
| Heating System | HVAC |
| Sewer | Connected |
| Account Number | 00857997 |
|---|---|
| Street Address | 10509 UNITY LN |
| City | POTOMAC |
| State | MD |
| Zip | 20854-1983 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | MAUPIN PT OF HOWARD TRACT |
| Legal Subdivision | KNOLLWOOD |
| Legal Block | A |
| Legal Lot Number | 3 |
| Jurisdiction | MONTGOMERY MD |
| Township / Civil Division | 10 |
| Census Block Group | 1 |
| Census Block | 1003 |
| Census Tract | 706007 |
Source: Montgomery County records · APN 10-00857997
Assessment roll updated August 17, 2026 · Last verified August 2026
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 | 10509 UNITY LN, POTOMAC, MD 20854-1983 |
| Owner Type | Company |
| Vesting | Company |
| Deed Names | Verified Name on Deed |
|---|---|
| Last Sale | Oct 21, 2003 · Amount on Record |
| Deed Sale | Oct 21, 2003 · Amount on Record |
| Prior Sale | Oct 21, 2003 · Amount on Record |
| Deed Document Number | 2003285720 |
| Deed Book / Page | 25598 / 490 |
| Transfer Doc | 0000222748 |
| Record Updated | Sep 20, 2026 |
Source: Montgomery County records · Assessment roll updated August 17, 2026 · Last verified August 2026
| Type | Name |
|---|---|
| State | Maryland |
| County | Montgomery County |
| Unified School District | Montgomery County Public Schools (PK - 12) |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $1,042,267 (+20.95%) | $1,403,400 (+62.86%) Land $550,800 Building $852,600 | |
| 2025 | $10,661.00 (+11.39%) | $861,700 (+3.82%) Land $550,800 Building $310,900 | $861,700 (-) Land $550,800 Building $310,900 |
| 2023 | $830,033 | $861,700 Land $550,800 Building $310,900 | |
| 2022 | $9,571.00 |
Source: FEMA National Flood Hazard Layer, Montgomery County (24031C), updated April 12, 2026 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 240317060071, refreshed September 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026
| FEMA Flood Zone | Zone X |
|---|---|
| Special Flood Hazard Area | No |
| Flood Hazard | Minimal |
| 500-Year Floodplain | No |
| Nearby Flood Policies | 9 in force |
| Nearby Flood Claims | 1 (2013) |
| Claims Outside the SFHA | 1 of 1 |
| Most Recent Claim | Sep 2013, rainfall accumulation |
| Wildfire Risk | Low above 20% of the US · above 41% of Maryland |
|---|---|
| Wildfire Likelihood | About 1 in 10,000 per year |
| Exposure | Direct burnable vegetation at the parcel |
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: FCC Broadband Data Collection, availability as of December 31, 2025 · Published October 2026 · based on 81 locations within about half a mile of this property
| Provider | Technology | Download / Upload (Mbps) |
|---|---|---|
| Verizon | Fiber | 2,300 / 2,300 |
| Xfinity | Cable | 2,000 / 250 |
| T-Mobile USA | Fixed Wireless | 100 / 20 |
| AT&T | Fixed Wireless | 100 / 20 |
Availability varies by address; speeds are provider-advertised maximums, not measured.
5G and 4G LTE
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