440 E Diamond Ave, Gaithersburg, MD 20877 Property Records

Montgomery County property record for 440 E Diamond Ave, Gaithersburg, MD 20877

Property Summary

Property Type	Single Family Home
Details	1 ba · 900 sqft · built 1946
Lot Size	0.144 acres (6,255 sqft)
Owner	Individual Name on File
Last Sale	$230,000 (May 2015)
Tax Bill	$4,624 (2025)
Deeds & Mortgages	Sep 2025 Transfer
Flood Zone	Zone X (minimal risk)
APN	`09-00833764`

Property Details

APN / Parcel Number

Primary APN	`09-00833764`
Alternative APN	`00833764`

Interior

Full Baths	1 Bath
Stories	1 Story
Building Area	900 sqft Living Area
1st Floor Area	900 sqft

Exterior

Year Built	Built 1946
Effective Year Built	Effective 1946
Construction Type	Frame
Lot Area	6,255 sqft (0.144 acres)
Garage Type	Detached
Garage Area	440 sqft
Parking Spaces	2 Parking Spaces

Exterior Amenities

Porch	Enclosed Porch
Porch Area	90 sqft
Shed	1 Shed
Shed Area	120 sqft

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Forced Air with A/C
Sewer	Municipal

Location & Zoning

Account Number	00833764
Street Address	440 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	DEER PARK
Legal Subdivision	DEER PARK
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 · APN 09-00833764

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	Individual Name on File
Mailing Address	440 E DIAMOND AVE, GAITHERSBURG, MD 20877-3018
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Sole Owner

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Verified Name on Deed
Last Sale	May 21, 2015 · Amount on Record
Deed Sale	May 21, 2015 · Amount on Record
Prior Sale	Jun 28, 2001 · Amount on Record
Deed Book / Page	50333 / 168
Last Transfer Date	Sep 01, 2025
Transfer Doc	0695740076
Record Updated	Sep 20, 2026

September 2025: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	MONTGOMERY MD
Recording Date	Sep 10, 2025
Property Address	440 E DIAMOND AVE, GAITHERSBURG, MD 20877-3018
Document Number	0695740076
Book / Page	69574 / 76
Instrument Date	Sep 09, 2025
Transaction Type	Transfer
Record Updated	Sep 24, 2025
Title Company	ACCOMODATION, ACCOMMODATION

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	Tenants in Severalty
Address	440 E DIAMOND AVE, GAITHERSBURG, MD 20877-3018

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		$316,300 (+3.39%) Land $205,800 Building $110,500	$316,300 (-) Land $205,800 Building $110,500
2025	$4,624.00 (-9.76%)	$305,933 (+7.27%)	$316,300 (+10.9%) Land $205,800 Building $110,500
2024	$5,124.00 (+27.11%)
2023		$285,200 Land $205,800 Building $79,400	$285,200 Land $205,800 Building $79,400
2022	$4,031.00

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.