10820 Alloway Dr, Potomac, MD 20854 Property Records

Montgomery County property record for 10820 Alloway Dr, Potomac, MD 20854

Property Summary

Property Type	Single Family Home
Details	4.5 ba · 5,424 sqft · built 1962
Lot Size	2.08 acres (90,605 sqft)
Owner	2 Company Names on Record
Last Sale	$1,675,000 (Oct 2020)
Tax Bill	$19,080 (2025)
Deeds & Mortgages	Dec 2020 Sale Oct 2020 Sale
Flood Zone	Zone X (minimal risk)
APN	`10-00878215`

Property Details

APN / Parcel Number

Primary APN	`10-00878215`
Alternative APN	`00878215`

Interior

Full Baths	4.5 Baths
Half Baths	1 Half Bath
Stories	1 Story
Building Area	5,424 sqft Living Area
1st Floor Area	3,136 sqft
Basement Area	1,150 sqft
Finished Basement	1,150 sqft
Utility Area	48 sqft
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1962
Effective Year Built	Effective 1962
Architectural Style	Multi-Level
Exterior Material	Brick
Construction Type	Frame
Roof Material	Composition Shingle
Lot Area	90,605 sqft
Garage Type	Detached
Garage Area	690 sqft
Parking Spaces	2 Parking Spaces
Porch	Open Porch
Porch Area	472 sqft
Patio Area	946 sqft

Utilities, Heating & Cooling

Cooling System	Central
Heating System	HVAC
Sewer	Connected

Location & Zoning

Account Number	00878215
Street Address	10820 ALLOWAY DR
City	POTOMAC
State	MD
Zip	20854-1503
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	RE2
Legal Description	GREAT FALLS EST
Legal Subdivision	GREAT FALLS ESTATES
Legal Block	H
Legal Lot Number	5
Jurisdiction	MONTGOMERY MD
Township / Civil Division	10
Census Block Group	3
Census Block	3003
Census Tract	706008

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	10820 ALLOWAY DR, POTOMAC, MD 20854-1503
Occupancy	Owner Occupied
Owner Type	Company
Vesting	Trust, Revocable Trust

Deeds, Mortgages & Sale History

Date	Document
Dec 10, 2020	Grant Deed, Transfer NOT AVAILABLE
Oct 2, 2020	Grant Deed, Transfer NOT AVAILABLE

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Oct 2, 2020 · Amount on Record
Deed Sale	Oct 2, 2020 · Amount on Record
Prior Sale	Jun 24, 2016 · Amount on Record
Deed Book / Page	60660 / 293
Last Transfer Date	Nov 9, 2020
Transfer Doc	0613200332
Record Updated	Sep 20, 2026

December 2020: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	MONTGOMERY MD
Recording Date	Dec 10, 2020
Property Address	10820 ALLOWAY DR, POTOMAC, MD 20854-1503
Document Number	0613200332
Book / Page	061320 / 000332
Instrument Date	Nov 9, 2020
Transaction Type	Transfer
Record Updated	Jan 8, 2021
Title Company	NOT AVAILABLE

Transaction

Tax	$0.00
Additional	Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Revocable Trust
Address	10820 ALLOWAY DR POTOMAC MD 208541503, POTOMAC, MD 20854-1503

October 2020: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	MONTGOMERY MD
Recording Date	Oct 2, 2020
Property Address	10820 ALLOWAY DR, POTOMAC, MD 20854-1503
Document Number	0606600293
Book / Page	060660 / 000293
Instrument Date	Aug 20, 2020
Transaction Type	Transfer
Record Updated	Nov 4, 2020
Title Company	NOT AVAILABLE

Transaction

Amount	Amount Recorded
Tax	$168.00
Amount Accuracy	Confirmed
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Husband and Wife
Address	10820 ALLOWAY DR POTOMAC MD 208541503, POTOMAC, MD 20854-1503

Tax Assessment & Valuation

Source: Montgomery County assessment roll, as of August 17, 2026

Property Jurisdictions

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

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$1,974,567 (+12.29%)	$2,406,700 (+36.86%) Land $903,300 Building $1,503,400
2025	$19,080.00 (+0.39%)	$1,758,500 (+24.91%) Land $903,300 Building $855,200	$1,758,500 (-) Land $903,300 Building $855,200
2024	$19,005.00 (+39.6%)
2023		$1,407,767	$1,758,500 Land $903,300 Building $855,200
2022	$13,614.00

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 · OpenFEMA NFIP redacted claims and policies, as of September 2026

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it
Flood Insurance Cost	Premium on Record median of 14 policies
Nearby Flood Policies	14 in force
Nearby Flood Claims	4 (1984–2014)
Claims Outside the SFHA	4 of 4
Most Recent Claim	Jun 2014 · other causes

Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; 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 80% of the US · above 41% of Maryland
Wildfire Likelihood	0.01% annual chance
Exposure	Direct burnable vegetation

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 75 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Verizon Fiber	2,300 / 2,300
Xfinity Cable	1,200 / 35

May also be available: T-Mobile.

Cell Coverage

5G (outdoors only) and 4G LTE

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