5109 Mountain Ln, Clarksville — tax account 1405449510
Single-family house built in 2009, 9,583 ft² on 1.12 acres in Clarksville, Howard County, assessed at $3,053,700; last transfer October 9, 2025 for $2,850,000.
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 | 1405449510 |
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| Map, grid, parcel | Map 28 Grid 18 Parcel 74 · Block 9999 Lot 86 |
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| Location | 5109 Mountain Ln, Clarksville MD 21029 |
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| Jurisdiction | Howard County |
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| Subdivision | Walnut |
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| Plat | 19224 |
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Land
| Land use | Residential (R) |
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| Zoning | RCDEO |
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| Acreage | 1.120 acres (48,787 ft²) |
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Structure
| Year built | 2009 |
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| Above-grade area | 9,583 ft² |
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| Style | 2 Story With Basement |
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| Building type | Standard Unit |
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| Construction | Stucco |
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| Quality grade | 7 (on a scale of 1 to 9) |
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Assessment — January 2026
| Land | $647,400 |
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| Improvements | $2,406,300 |
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| Total | $3,053,700 |
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| Homestead qualification code | 1 |
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Last transfer
| Date | October 9, 2025 |
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| Consideration | $2,850,000 |
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| Deed reference | liber 11001, folio 0536 |
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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 348% above the median residential account in Howard County ($681,000, 62,119 accounts).
- The last transfer price is 7% 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.
The report for account 1405449510
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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