Montgomery County property record for 421 Gaither St, Gaithersburg, MD 20877
| Property Type | Single Family Home |
|---|---|
| Details | 3 ba · 1,894 sqft · built 1954 |
| Lot Size | 0.81 acres (35,283 sqft) |
| Owner | 2 Individual Names on File |
| Tax Bill | $6,510 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 09-00835694 |
| Primary APN | 09-00835694 |
|---|---|
| Alternative APN |
|
| Full Baths | 3 Baths |
|---|---|
| Stories | 2 Stories |
| Building Area | 1,894 sqft Living Area |
| 1st Floor Area | 1,453 sqft |
| Year Built | Built 1954 |
|---|---|
| Effective Year Built | Effective 1954 |
| Architectural Style | Bi-Level |
| Construction Type | Frame |
| Roof Material | Composition Shingle |
| Lot Area | 35,283 sqft (0.81 acres) |
| Garage Type | Detached |
| Garage Area | 440 sqft |
| Parking Spaces | 2 Parking Spaces |
| Deck Area | 114 sqft |
| Gazebo | 80 sqft |
| Sauna | Sauna |
| Cooling System | HVAC |
|---|---|
| Heating System | HVAC |
| Sewer | Municipal |
| Account Number | 00835694 |
|---|---|
| Street Address | 421 GAITHER ST |
| City | GAITHERSBURG |
| State | MD |
| Zip | 20877-2064 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R90 |
| Legal Description | DEER PARK |
| Legal Subdivision | DEER PARK |
| Legal Block | 1 |
| Jurisdiction | MONTGOMERY MD |
| Township / Civil Division | 9 |
| Census Block Group | 1 |
| Census Block | 1007 |
| Census Tract | 700727 |
Source: Montgomery County records · APN 09-00835694
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 | 2 Individual Names on File |
|---|---|
| Mailing Address | 421 GAITHER ST, GAITHERSBURG, MD 20877-2064 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| 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 |
| Municipality | Gaithersburg City |
| 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 | $561,100 (+7.68%) Land $264,100 Building $297,000 | $561,100 (-) Land $264,100 Building $297,000 | |
| 2025 | $6,510.00 (+48.73%) | $521,100 (+18.14%) | $561,100 (+27.2%) Land $264,100 Building $297,000 |
| 2023 | $441,100 Land $264,100 Building $177,000 | $441,100 Land $264,100 Building $177,000 | |
| 2022 | $4,377.00 |
Source: FEMA National Flood Hazard Layer as of April 12, 2026 · USDA Forest Service Wildfire Risk to Communities as of 2024 · Last verified October 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Wildfire Risk | Low lower than 98% of the US · lower than 96% of Maryland |
|---|---|
| Wildfire Likelihood | Under 0.01% annual chance |
| Exposure | None beyond ember reach |
Values are read at the parcel center point; lenders make the official flood determination.
Source: FCC Broadband Data Collection as of December 31, 2025 · Last verified October 2026
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 2,000 |
| Verizon Fiber · Fixed Wireless in parts of the area | 980 / 880 |
May also be available: AT&T, Radiate Holdings.
Based on FCC filings for 155 locations within half a mile of this property.
Source: EPA Safe Drinking Water Information System as of 2026 Q3 · EPA water system boundaries as of March 2026 · Last verified October 2026
| Water System | WASHINGTON SUBURBAN SANITARY COMMISSION serves 1,900,000 people |
|---|---|
| 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 as reported to EPA, not water tested at this address; lead at the tap also depends on the building's own pipes. The full violation and enforcement history is in the system's EPA record.
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