11509 Paramus Dr, Gaithersburg — tax account 160602534937

Single-family house built in 1987, 2,158 ft² on 0.26 acres in Gaithersburg, Montgomery County, assessed at $978,400; last transfer November 10, 2025 for $960,000.

From the State Department of Assessments and Taxation file as published by the Maryland Department of Planning (MD iMAP) — not the official record. Open the official SDAT record.

Account

Tax account number	160602534937
Map, grid, parcel	Map FR12 · Block D Lot 13
Location	11509 Paramus Dr, Gaithersburg MD 20878
Jurisdiction	Montgomery County
Subdivision	Dufief Mill Estates
Plat	15469

Land

Land use	Exempt (E)
Zoning	R200
Acreage	0.256 acres (11,151 ft²)

Structure

Year built	1987
Above-grade area	2,158 ft²
Style	2 Story With Basement
Building type	Standard Unit
Construction	Frame
Quality grade	4 (on a scale of 1 to 9)

Assessment — October 2024

Land	$353,500
Improvements	$624,900
Total	$978,400
Homestead qualification code	1

Last transfer

Date	November 10, 2025
Consideration	$960,000
Deed reference	liber 53304, folio 0365

What this means

Maryland reassesses each property every three years; increases are phased in over the following three years, and the Homestead Tax Credit caps the yearly increase on a principal residence.
Assessed 209% above the median exempt account in Montgomery County ($316,700, 11,153 accounts).
The last transfer price is 2% below the current assessment.

Parcel point of the Maryland Department of Planning — not a survey.

Data: Maryland Department of Planning / SDAT, MD iMAP Parcel Points, retrieved November 1, 2026. Sources and freshness. No owner names or mailing addresses are published.

First page of a sample Maryland Property Report

The report for account 160602534937

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