424 E Diamond Ave, Gaithersburg, MD 20877 Property Records

Montgomery County property record for 424 E Diamond Ave, Gaithersburg, MD 20877

Property Summary

Property Type	Commercial Office
Details	1,506 sqft · built 1948
Lot Size	0.372 acres (16,181 sqft)
Owner	Company Name on File
Last Sale	$74,000 (Nov 1989)
Tax Bill	$5,895 (2025)
Deeds & Mortgages	Jul 2017 Transfer
Flood Zone	Zone X (minimal risk)
APN	`09-02651644`

Property Details

APN / Parcel Number

Primary APN	`09-02651644`
Alternative APN	`02651644`

Interior

Stories	1 Story
Building Area	1,506 sqft Gross Area
1st Floor Area	1,506 sqft
Basement Area	1,506 sqft

Exterior

Year Built	Built 1948
Effective Year Built	Effective 1948
Exterior Material	Wood
Construction Type	Brick
Fire Resistance	Wood or Wood & Steel Frame
Lot Area	16,181 sqft (0.372 acres)
View / Lot	Commercial/Industrial

Exterior Amenities

Porch	Open Porch
Porch Area	168 sqft
Deck Area	208 sqft
Patio Area	208 sqft

Utilities, Heating & Cooling

Cooling System	A/C Chilled Water
Heating System	Hot Water
Sewer	Municipal

Location & Zoning

Account Number	02651644
Street Address	424 E DIAMOND AVE
City	GAITHERSBURG
State	MD
Zip	20877-3018
Property Category	Commercial
Property Type	Commercial > Office > Commercial Office
Local Zoning Code	CBD
Legal Description	WALDERS ADD GAITHERS BURG
Legal Subdivision	GAITHERSBURG TOWN
Legal Block	1
Legal Lot Number	1
Jurisdiction	MONTGOMERY MD
Township / Civil Division	9
Census Block Group	1
Census Block	1003
Census Tract	700725

Owner

Source: Montgomery County records · APN 09-02651644

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	21136 WESTERLY RD, POOLESVILLE, MD 20837-9330
Owner Type	Company
Vesting	Company

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Verified Name on Deed
Last Sale	Nov 21, 1989 · Amount on Record
Deed Sale	Nov 21, 1989 · Amount on Record
Deed Book / Page	9091 / 133
Last Transfer Date	Dec 06, 2016
Transfer Doc	0534390059
Record Updated	Sep 20, 2026

July 2017: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	MONTGOMERY MD
Recording Date	Jul 13, 2017
Property Address	424 E DIAMOND AVE, GAITHERSBURG, MD 20877-3018
Document Number	0545890275
Book / Page	054589 / 000275
Instrument Date	Jun 01, 2017
Transaction Type	Transfer
Record Updated	Jul 24, 2017
Title Company	ATTORNEY ONLY

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Company
Address	23910 CLARKSBURG RD CLARKSBURG MD 208719241, CLARKSBURG, MD 20871-9241

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		$406,800 (+3.18%) Land $257,600 Building $149,200	$406,800 (-) Land $257,600 Building $149,200
2025	$5,895.00 (+4.48%)	$394,267 (+6.79%)	$406,800 (+10.18%) Land $257,600 Building $149,200
2024	$5,642.00 (+8.69%)
2023		$369,200 Land $234,100 Building $135,100	$369,200 Land $234,100 Building $135,100
2022	$5,191.00

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.