9151 Longs Mill Rd is a 1,415 square foot house on a 5 acre lot with 1 bathroom. Based on Redfin's Rocky Ridge data, we estimate the home's value is $373,228.
Single-familyProperty Type
1920Year Built
5 acresLot Size
$264Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$373,228
$39K since September
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 9.4% lower than the average sale price ($412K) of 6 comparable homes.
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Earn from this home
Sell
$349,720
Est. take-home
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Market trends in 21778, MD
Last updated September 2026
Sale-to-List Price
98.5%
1.5% MoM
Median sale price
$398K
$43K MoM
Avg. days on market
98d
65 days MoM
Recently sold homes
2
1 MoM
Provided by Redfin
Sale history for 9151 Longs Mill Rd
As the MLS and public records start to fill up, we'll list the details here.
Year
Property tax
Land + Additions
Assessment*
2026
$3,136 (+5.0%)
$94,000 + $178,200
$272,200
2025
$2,985 (+5.1%)
$94,000 + $178,200
$272,200
2024
$2,841 (+9.4%)
2023
$2,597 (+2.2%)
2022
$2,542 (+1.4%)
$94,000 + $116,900
$210,900
2021
$2,508 (+3.2%)
2020
$2,431 (+0.5%)
2019
$2,419 (−0.4%)
$94,000 + $102,600
$196,600
2018
$2,428 (+1.4%)
2017
$2,395 (−1.3%)
$94,000 + $99,500
$193,500
2015
$2,426 (−0.3%)
$98,000 + $96,400
$194,400
2014
$2,434
2013
$2,434 (−7.2%)
2012
$2,622 (+4.6%)
2011
$2,507
2010
$2,507 (+37.3%)
2009
$1,826
Tax history for 9151 Longs Mill Rd
Year
Property tax
Land + Additions
Assessment*
2026
$3,136 (+5.0%)
$94,000 + $178,200
$272,200
2025
$2,985 (+5.1%)
$94,000 + $178,200
$272,200
2024
$2,841 (+9.4%)
2023
$2,597 (+2.2%)
2022
$2,542 (+1.4%)
$94,000 + $116,900
$210,900
2021
$2,508 (+3.2%)
2020
$2,431 (+0.5%)
2019
$2,419 (−0.4%)
$94,000 + $102,600
$196,600
2018
$2,428 (+1.4%)
2017
$2,395 (−1.3%)
$94,000 + $99,500
$193,500
2015
$2,426 (−0.3%)
$98,000 + $96,400
$194,400
2014
$2,434
2013
$2,434 (−7.2%)
2012
$2,622 (+4.6%)
2011
$2,507
2010
$2,507 (+37.3%)
2009
$1,826
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Zoning
A
Agricultural District
The purpose of the Agricultural District (A) is to preserve productive agricultural land and the character and quality of the rural environment and to prevent urbanization where roads and other public facilities are scaled to meet only rural needs.