21600 Glendalough Rd, Gaithersburg — tax account 160101712634
Single-family house built in 1977, 3,020 ft² on 1.49 acres in Gaithersburg, Montgomery County, assessed at $809,900; last transfer April 30, 2026 for $935,000.
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 | 160101712634 |
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| Map, grid, parcel | Map GV · Block D Lot 2 |
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| Location | 21600 Glendalough Rd, Gaithersburg MD 20882 |
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| Jurisdiction | Montgomery County |
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| Subdivision | Goshen Hunt Hills |
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Land
| Land use | Exempt (E) |
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| Zoning | AR |
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| Acreage | 1.486 acres (64,730 ft²) |
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Structure
| Year built | 1977 |
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| Above-grade area | 3,020 ft² |
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| Style | 2 Story With Basement |
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| Building type | Standard Unit |
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| Construction | Frame |
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| Quality grade | 5 (on a scale of 1 to 9) |
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Assessment — November 2023
| Land | $204,000 |
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| Improvements | $605,900 |
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| Total | $809,900 |
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Last transfer
| Date | April 30, 2026 |
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| Consideration | $935,000 |
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| Deed reference | liber 67194, folio 0397 |
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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 156% above the median exempt account in Montgomery County ($316,700, 11,153 accounts).
- The last transfer price is 15% above the current assessment.
- Built before 1978: Maryland requires rental units built before 1978 to be registered with MDE and to pass a lead-risk reduction inspection.
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.
The report for account 160101712634
This page shows the assessment record. The report adds what lies around the property: FEMA flood zone, Critical Area designation, wetlands, contaminated land sites nearby and historic properties.
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