412 E Diamond Ave, Gaithersburg, MD 20877 Property Records

Montgomery County property record for 412 E Diamond Ave, Gaithersburg, MD 20877

Property Summary

Property Type	Single Family Home
Details	4,780 sqft · built 1877
Lot Size	0.972 acres (42,330 sqft)
Owner	2 Individual Names on File
Tax Bill	$3,628 (2025)
Deeds & Mortgages	Dec 2021 Transfer
Flood Zone	Zone X (minimal risk)
APN	`09-03394246`

Property Details

APN / Parcel Number

Primary APN	`09-03394246`
Alternative APNs	`0900835810` `03394246`

Interior

Stories	2 Stories
Building Area	4,780 sqft Living Area
1st Floor Area	4,780 sqft
Basement Area	964 sqft

Exterior

Year Built	Built 1877
Effective Year Built	Effective 1877
Construction Type	Brick
Fire Resistance	Wood or Wood & Steel Frame
Lot Area	42,330 sqft (0.972 acres)
View / Lot	Commercial/Industrial
Garage Type	Detached
Garage Area	304 sqft
Parking Spaces	1 Parking Space
Total Buildings	2 Buildings

Utilities, Heating & Cooling

Cooling System	Central
Heating System	HVAC

Location & Zoning

Account Number	03394246
Street Address	412 E DIAMOND AVE
City	GAITHERSBURG
State	MD
Zip	20877-3018
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	CBD
Legal Description	OLDE TOWNE
Legal Subdivision	GAITHERSBURG TOWN
Legal Block	L
Legal Lot Number	100
Jurisdiction	MONTGOMERY MD
Township / Civil Division	9
Census Block Group	1
Census Block	1003
Census Tract	700725

Owner

Source: Montgomery County records · APN 09-03394246

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	412 E DIAMOND AVE, GAITHERSBURG, MD 20877-3018
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Joint Tenants

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Transfer Date	Dec 17, 2021
Transfer Doc	6488000158
Record Updated	Sep 20, 2026

December 2021: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	MONTGOMERY MD
Recording Date	Dec 23, 2021
Property Address	412 E DIAMOND AVE, GAITHERSBURG, MD 20877-3018
Document Number	0648890158
Book / Page	64889 / 158
Instrument Date	Dec 17, 2021
Transaction Type	Transfer
Record Updated	Jan 10, 2022
Title Company	CORE TITLE GROUP LLC

Transaction

Tax	$0.00
Amount Accuracy	No Consideration Stated
Additional	Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants with Right of Survivorship

Tax Assessment & Valuation

Source: Montgomery County records · Assessment roll updated August 17, 2026 · Last verified August 2026

Property Jurisdictions

Type	Name
State	Maryland
County	Montgomery County
Municipality	Gaithersburg City
Unified School District	Montgomery County Public Schools (PK - 12)

Tax Bill & Assessment History

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		$248,400 (+1.1%) Land $196,000 Building $52,400	$248,400 (-) Land $196,000 Building $52,400
2025	$3,628.00 (-13.06%)	$245,700 (+2.25%)	$248,400 (+3.37%) Land $196,000 Building $52,400
2024	$4,173.00 (+18.25%)
2023		$240,300 Land $196,000 Building $44,300	$240,300 Land $196,000 Building $44,300
2022	$3,529.00

Flood & Wildfire

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

Flood

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it

Wildfire

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.

Internet Providers

Source: FCC Broadband Data Collection as of December 31, 2025 · Last verified October 2026

Provider	Max Down / Up (Mbps)
Verizon Fiber · Fixed Wireless in parts of the area	2,300 / 2,300
Xfinity Cable	2,000 / 2,000
Radiate Holdings Cable	1,500 / 50

May also be available: T-Mobile USA.

Based on FCC filings for 212 locations within half a mile of this property.

Drinking Water

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

Violations Reported to EPA

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.