302 E Diamond Ave, Gaithersburg, MD 20877 Property Records

Montgomery County property record for 302 E Diamond Ave, Gaithersburg, MD 20877

Property Summary

Property Type	Commercial Office
Details	6,848 sqft · built 1892
Lot Size	0.095 acres (4,129 sqft)
Owner	2 Company Names on Record
Last Sale	$300,000 (Aug 2020)
Tax Bill	$18,830 (2025)
Deeds & Mortgages	Mar 2023 Transfer Aug 2020 Sale + 1 more
Flood Zone	Zone X (minimal risk)
APN	`09-00818063`

Property Details

APN / Parcel Number

Primary APN	`09-00818063`
Alternative APN	`00818063`

Interior

Units	3 Units
Stories	2 Stories
Building Area	6,848 sqft Gross Area
1st Floor Area	6,848 sqft
Fire Sprinklers	Fire Sprinklers

Exterior

Year Built	Built 1892
Effective Year Built	Effective 1892
Construction Type	Brick
Fire Resistance	Masonry Walls, Wood Interior
Lot Area	4,129 sqft (0.095 acres)
View / Lot	Commercial/Industrial

Utilities, Heating & Cooling

Cooling System	Central
Heating System	HVAC
Sewer	Municipal

Location & Zoning

Account Number	00818063
Street Address	302 E DIAMOND AVE
City	GAITHERSBURG
State	MD
Zip	20877-5031
Property Category	Commercial
Property Type	Commercial > Office > Commercial Office
Local Zoning Code	CBD
Legal Description	DIAMOND AVE & SUMMIT AVE ETC
Legal Subdivision	GAITHERSBURG TOWN
Legal Block	1
Jurisdiction	MONTGOMERY MD
Township / Civil Division	9
Census Block Group	1
Census Block	1002
Census Tract	700725

Owner

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 Company Names on Record
Mailing Address	316 E DIAMOND AVE, GAITHERSBURG, MD 20877-3016
Owner Type	Company
Vesting	Trust, Revocable Trust

Deeds, Mortgages & Sale History

Date	Document
Mar 28, 2023	Intrafamily Transfer, Transfer
Aug 24, 2020	Grant Deed, Transfer ATTORNEY ONLY
Oct 9, 2018	Quit Claim Deed, Transfer ATTORNEY ONLY

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Aug 24, 2020 · Amount on Record
Deed Sale	Aug 24, 2020 · Amount on Record
Prior Sale	Sep 2, 2008
Deed Book / Page	60339 / 293
Last Transfer Date	Mar 17, 2023
Transfer Doc	0668490443
Record Updated	Sep 20, 2026

March 2023: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	MONTGOMERY MD
Recording Date	Mar 28, 2023
Property Address	302 E DIAMOND AVE, GAITHERSBURG, MD 20877-5031
Document Number	0668490443
Book / Page	66849 / 443
Map Reference	LB CKW 1655 FO 534
Instrument Date	Mar 17, 2023
Transaction Type	Transfer
Record Updated	Apr 25, 2023

Transaction

Tax	$0.00
Amount Accuracy	Transfer Tax Exempt
Additional	Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Tenants in Severalty
Address	316 E DIAMOND AVE, GAITHERSBURG, MD 20877-3070

August 2020: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	MONTGOMERY MD
Recording Date	Aug 24, 2020
Property Address	302 E DIAMOND AVE, GAITHERSBURG, MD 20877-5031
Document Number	0603390293
Book / Page	060339 / 000293
Instrument Date	Aug 11, 2020
Transaction Type	Transfer
Record Updated	Sep 21, 2020
Title Company	ATTORNEY ONLY

Transaction

Amount	Amount Recorded
Tax	$3,000.00
Amount Accuracy	Confirmed
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Tenants in Common
Address	316 E DIAMOND AVE GAITHERSBURG MD 208773070, GAITHERSBURG, MD 20877-3070

October 2018: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	MONTGOMERY MD
Recording Date	Oct 9, 2018
Property Address	302 E DIAMOND AVE, GAITHERSBURG, MD 20877-5031
Document Number	0567130210
Book / Page	056713 / 000210
Instrument Date	Jun 10, 2018
Transaction Type	Transfer
Record Updated	Oct 26, 2018
Title Company	ATTORNEY ONLY

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer Partial Interest

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Sole Owner
Address	316 E DIAMOND AVE GAITHERSBURG MD 208773070, GAITHERSBURG, MD 20877-3070

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		$1,397,300 (+1.8%) Land $103,200 Building $1,294,100	$1,397,300 (-) Land $103,200 Building $1,294,100
2025	$18,830.00 (+3.23%)	$1,372,533 (+3.74%)	$1,397,300 (+5.62%) Land $103,200 Building $1,294,100
2024	$18,241.00 (+9.5%)
2023		$1,323,000 Land $103,200 Building $1,219,800	$1,323,000 Land $103,200 Building $1,219,800
2022	$16,659.00

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 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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