8304 Mariner Ct, Gaithersburg — tax account 161200951021
Single-family house built in 1978, 2,556 ft² on 1.24 acres in Gaithersburg, Montgomery County, assessed at $690,100; last transfer May 21, 2026 for $695,000.
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 | 161200951021 |
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| Map, grid, parcel | Map GW · Block F Lot 19 |
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| Location | 8304 Mariner Ct, Gaithersburg MD 20882 |
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| Jurisdiction | Montgomery County |
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| Subdivision | Upper Seneca Crest |
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| Plat | 10328 |
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Land
| Land use | Residential (R) |
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| Zoning | RC |
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| Acreage | 1.240 acres (54,014 ft²) |
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Structure
| Year built | 1978 |
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| Above-grade area | 2,556 ft² |
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| Style | 1 Story With Basement |
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| Building type | Standard Unit |
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| Construction | Siding |
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| Quality grade | 4 (on a scale of 1 to 9) |
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Assessment — October 2024
| Land | $236,400 |
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| Improvements | $453,700 |
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| Total | $690,100 |
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Last transfer
| Date | May 21, 2026 |
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| Consideration | $695,000 |
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| Deed reference | liber 68735, folio 0071 |
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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 11% above the median residential account in Montgomery County ($623,400, 248,486 accounts).
- The last transfer price is 1% above 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.
The report for account 161200951021
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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