Montgomery County property record for 502 Marshall Ave, Rockville, MD 20851
| Property Type | Single Family Home |
|---|---|
| Details | 2 ba · 1,287 sqft · built 1954 |
| Lot Size | 0.129 acres (5,625 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $145,000 (Nov 1994) |
| Tax Bill | $5,843 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 04-00227403 |
| Primary APN | 04-00227403 |
|---|---|
| Alternative APN |
|
| Full Baths | 2 Baths |
|---|---|
| Stories | 1 Story |
| Building Area | 1,287 sqft Living Area |
| 1st Floor Area | 858 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1954 |
|---|---|
| Effective Year Built | Effective 1954 |
| Architectural Style | Multi-Level |
| Construction Type | Frame |
| Roof Material | Composition Shingle |
| Lot Area | 5,625 sqft (0.129 acres) |
| Garage Type | Carport |
| Garage Area | 260 sqft |
| Carport | Carport |
| Carport Area | 260 sqft |
| Parking Spaces | 1 Parking Space |
| Cooling System | HVAC |
|---|---|
| Heating System | HVAC |
| Sewer | Municipal |
| Account Number | 00227403 |
|---|---|
| Street Address | 502 MARSHALL AVE |
| City | ROCKVILLE |
| State | MD |
| Zip | 20851-1449 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R60 |
| Legal Description | TWINBROOK FOREST |
| Legal Subdivision | GEERAERTS ADD TO TWINBROOK FOREST |
| Legal Block | F |
| Legal Lot Number | 27 |
| Jurisdiction | MONTGOMERY MD |
| Township / Civil Division | 4 |
| Census Block Group | 2 |
| Census Block | 2012 |
| Census Tract | 701101 |
502 Marshall Ave is owned and occupied by two individuals who acquired it in February 2025.
Source: Montgomery County records, as of August 17, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 502 MARSHALL AVE, ROCKVILLE, MD 20851-1449 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Tenants by the Entirety |
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 Sale | Nov 7, 1994 · Amount on File |
| Deed Sale | Nov 7, 1994 · Amount on File |
| Deed Book / Page | 13057 / 394 |
| Last Transfer Date | Feb 21, 2025 |
| Transfer Doc | 0689160054 |
| Record Updated | Sep 20, 2026 |
The 2025 property tax bill for 502 Marshall Ave was $5,843, up 5.2% from the year before.
Source: Montgomery County assessment roll, as of August 17, 2026
| Type | Name |
|---|---|
| State | Maryland |
| County | Montgomery County |
| Municipality | Rockville City |
| Unified School District | Montgomery County Public Schools (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $393,000 (+3.92%) Land $228,400 Building $164,600 | $393,000 (-) Land $228,400 Building $164,600 | |
| 2025 | $5,843.00 (+5.17%) | $378,167 | $393,000 Land $228,400 Building $164,600 |
| 2024 | $5,556.00 | ||
| 2023 | $348,500 Land $217,500 Building $131,000 | $348,500 Land $217,500 Building $131,000 | |
| 2022 | $4,360.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 502 Marshall Ave in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective April 12, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Nearby Flood Policies | 7 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 502 Marshall Ave is low, with less than 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 93% of the US · lower than 85% of Maryland |
|---|---|
| Wildfire Likelihood | Under 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 | CITY OF ROCKVILLE serves 52,000 people · EPA ID MD0150003 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Jun 2025 |
| Lead | Under 1 ppb (2018) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | 1 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 377 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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