Montgomery County property record for 370 E Diamond Ave, Gaithersburg, MD 20877
| Property Type | Apartments (5+ Units) |
|---|---|
| Details | 912,992 sqft · built 2013 |
| Lot Size | 6.1 acres (266,084 sqft) |
| Owner | 2 Individual Names on Record |
| Tax Bill | $1,320,109 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 09-03639341 |
| Primary APN | 09-03639341 |
|---|---|
| Alternative APN |
|
| Units | 636 Units |
|---|---|
| Stories | 4 Stories |
| Building Area | 912,992 sqft Living Area |
| 1st Floor Area | 912,992 sqft |
| Year Built | Built 2013 |
|---|---|
| Effective Year Built | Effective 2013 |
| Exterior Material | Brick |
| Construction Type | Brick |
| Fire Resistance | Fireproof Steel Frame |
| Lot Area | 266,084 sqft |
| View / Lot | Commercial/Industrial |
| Total Buildings | 2 Buildings |
| Cooling System | A/C Chilled Water |
|---|---|
| Heating System | Hot Water |
| Sewer | Municipal |
| Account Number | 03639341 |
|---|---|
| Street Address | 370 E DIAMOND AVE |
| City | GAITHERSBURG |
| State | MD |
| Zip | 20877-3032 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Apartments (5+ Units) |
| Local Zoning Code | CBD |
| Legal Description | PAR A OLDE TOWNE |
| Legal Subdivision | GAITHERSBURG TOWN |
| Legal Block | E |
| Jurisdiction | MONTGOMERY MD |
| Township / Civil Division | 9 |
| Census Block Group | 1 |
| Census Block | 1002 |
| Census Tract | 700725 |
Source: Montgomery County records, as of August 17, 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 Record |
|---|---|
| Mailing Address | PO BOX 87407, CHICAGO, IL 60680-0407 |
| Owner Type | Individual |
| Vesting | Partnership |
| Deed Names | 2 Names on Deed |
|---|---|
| Record Updated | Sep 20, 2026 |
Source: Montgomery County assessment roll, as of August 17, 2026
| Type | Name |
|---|---|
| State | Maryland |
| County | Montgomery County |
| Municipality | Gaithersburg City |
| Unified School District | Montgomery County Public Schools (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $101,090,300 (+1.44%) Land $8,519,100 Building $92,571,200 | $101,090,300 (-) Land $8,519,100 Building $92,571,200 | |
| 2025 | $1,320,109.00 (+11.46%) | $99,656,000 (+2.96%) | $101,090,300 (+4.45%) Land $8,519,100 Building $92,571,200 |
| 2023 | $96,787,400 Land $8,519,100 Building $88,268,300 | $96,787,400 Land $8,519,100 Building $88,268,300 | |
| 2022 | $1,184,376.00 |
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 April 12, 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 98% of the US · lower than 96% 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 | 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 276 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Verizon Fiber · Fixed Wireless in parts of the area | 2,300 / 2,300 |
| Xfinity Cable | 2,000 / 2,000 |
| Astound Broadband Cable | 1,500 / 50 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: AT&T.
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