422 E Diamond Ave, Gaithersburg, MD 20877 Property Records

Montgomery County property record for 422 E Diamond Ave, Gaithersburg, MD 20877

Property Summary

Property Type	Commercial Office
Details	1,149 sqft · built 1932
Lot Size	0.436 acres (19,000 sqft)
Owner	2 Individual Names on Record
Tax Bill	$4,286 (2025)
Deeds & Mortgages	Sep 2026 Sale Sep 2026 Sale
Flood Zone	Zone X (minimal risk)
APN	`09-00817866`

Property Details

APN / Parcel Number

Primary APN	`09-00817866`
Alternative APN	`00817866`

Interior

Stories	2 Stories
Building Area	1,149 sqft Gross Area
1st Floor Area	1,149 sqft
Basement Area	766 sqft

Exterior

Year Built	Built 1932
Effective Year Built	Effective 1932
Construction Type	Brick
Fire Resistance	Wood or Wood & Steel Frame
Lot Area	19,000 sqft (0.436 acres)
View / Lot	Commercial/Industrial
Porch	Slab
Porch Area	176 sqft

Utilities, Heating & Cooling

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

Location & Zoning

Account Number	00817866
Street Address	422 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	LOT ON DIAMOND AVE
Legal Subdivision	GAITHERSBURG TOWN
Legal Block	1
Jurisdiction	MONTGOMERY MD
Township / Civil Division	9
Census Block Group	1
Census Block	1003
Census Tract	700725

Owner

Source: Montgomery County records, as of October 16, 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	422 E DIAMOND AVE, GAITHERSBURG, MD 20877-3018
Owner Type	Individual
Vesting	Tenants in Common

Deeds, Mortgages & Sale History

Date	Document
Sep 23, 2026	Deed of Distribution, Transfer NONE LISTED ON DOCUMENT
Sep 1, 2026	Deed of Distribution, Transfer NONE LISTED ON DOCUMENT

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	May 13, 1996
Deed Sale	May 13, 1996
Deed Document Number	199669433
Deed Book / Page	14113 / 519
Record Updated	Oct 29, 2026

September 2026: Deed of Distribution, Transfer

Document Type	Deed of Distribution
Jurisdiction	MONTGOMERY MD
Recording Date	Sep 23, 2026
Property Address	422 E DIAMOND AVE, GAITHERSBURG, MD 20877-3018
Document Number	7095000119
Book / Page	70959 / 119
Instrument Date	Sep 12, 2026
Transaction Type	Transfer
Record Updated	Oct 16, 2026
Title Company	NONE LISTED ON DOCUMENT

Transaction

Tax	$0.00
Amount Accuracy	Full Amount Stated
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Tenants in Common
Address	422 E DIAMOND AVE, GAITHERSBURG, MD 20877-3018

September 2026: Deed of Distribution, Transfer

Document Type	Deed of Distribution
Jurisdiction	MONTGOMERY MD
Recording Date	Sep 1, 2026
Property Address	422 E DIAMOND AVE, GAITHERSBURG, MD 20877-3018
Document Number	7089000255
Book / Page	70892 / 255
Instrument Date	Aug 22, 2026
Transaction Type	Transfer
Record Updated	Sep 11, 2026
Title Company	NONE LISTED ON DOCUMENT

Transaction

Tax	$0.00
Amount Accuracy	Full Amount Stated
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Revocable Trust
Address	422 E DIAMOND AVE, GAITHERSBURG, MD 20877-3018

Tax Assessment & Valuation

Source: Montgomery County assessment roll, as of August 17, 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

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$478,600 (+14.82%) Land $263,500 Building $215,100	$478,600 (-) Land $263,500 Building $215,100
2025	$4,286.00 (+717.94%)	$416,833 (+42.12%)	$478,600 (+63.18%) Land $263,500 Building $215,100
2023		$293,300 Land $239,600 Building $53,700	$293,300 Land $239,600 Building $53,700
2022	$524.00

Assessed value and assessed market value are set for property tax purposes and are not market price estimates.

Flood

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.

Wildfire

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.

Drinking Water

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

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, not water tested at this address; lead at the tap also depends on the building's own pipes.

Internet Providers

Source: FCC Broadband Data Collection, based on 212 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

May also be available: T-Mobile.

Nearby Properties on E Diamond Ave

Nearby Streets

Search Property Records by Address or Parcel Number

Search by:

By searching, you agree to: Terms • Privacy • Disclosures