SELLER PREQUIRES PREAPPROVAL LETTER OR PROOF OF FUNDS PRIOR TO SCHEDULING A SHOWING. * * * 45 acre estate that harmoniously melds Maryland's rich history with modern luxury along the tranquil banks of Broad Creek. This property is a historical gem with a plethora of features that cater to both comfort and style. * * Recent Improvements: 2024 – New electric service line to lower garage. Entire interior of house painted. New basement carpets. Basement refinished and updated. Primary bathroom renovated. 14 Window/ Door glass replacement. Deck refinished. New water heater for main house. 2023 – Wood pellet stove installed. Water treatment installed. Barn painted. 2022 – New HVAC system in Great Room. New roof on center section of main house. Replaced 4’ of slate roof and all snow guards. Replaced all water hydrants throughout property. New circuit breaker box installed at tennis court. Woodburning stove insert installed. 2021-2023 – Cottage COMPLETELY GUTTED to studs and completely renovated. New 1st floor joists/mud sill, all new insulation, 200 AMP service, all new electric, plumbing, roof, gutters, siding, windows, doors HVAC, appliances, hardwood floors, gas fireplace, propane tank (owned). 2021 – Septic system repair/upgrade: 2 new septic tanks; 1 new pump chamber and force main. New service line to cottage. Bathrooms upgraded and all new toilets. 2020 - Driveway replace. Property Features: * * Historic Charm Meets Modern Luxury * * : Step inside the main residence where classic millwork and hardwood floors create an inviting atmosphere. With six fireplaces dotting the space, this home seamlessly integrates historic elegance with a contemporary family area. The sunlit Great Room offers breathtaking views, perfect for both relaxation and entertainment. * * Chef's Kitchen * * : Culinary enthusiasts will appreciate the chef's kitchen, which balances old-world charm with state-of-the-art amenities. It beautifully centers around a preserved 1743 structure, blending tradition with modern functionality. * * Rustic Appeal * * : A restored mill adds a unique rustic touch, while a renovated guest cottage provides a cozy retreat for visitors or potential rental income. * * Expansive Outdoor Amenities * * : Enjoy luxurious outdoor living with a tennis court, stable barn, and a 12-car garage surrounded by lush woodlands. A serene pond on the property can be transformed into a sparkling swimming pool, perfect for summer gatherings. * * Grounds and Landscaping * * : The enchanting landscaping enhances the property's natural beauty, while every detail, from the re-pointed mill to the meticulously maintained gardens, speaks to the estate's storied past. Historical Significance: - This estate is recognized on the * * National Historic Registry * * and the * * Maryland Register of Historic Places * * , emphasizing its cultural importance. - It is a designated site on the * * National Underground Railroad Network to Freedom * * , being the birthplace of Margaret Morgan and the only privately held site in Harford County related to this historic movement. - While the property holds significant historical value, it is not on the * * Harford County Register of Historic Places * * , allowing for flexibility in renovations without needing approval, though owners may seek this designation for access to tax breaks and grants for preservation efforts. Additional Information: * * Conservation Easement * * : Detailed information regarding conservation easement, Maryland Environmental Trust involvement, tax benefits, and a comprehensive forest management plan is available for interested buyers. * * Hunting Lease * * : The property currently has a lease agreement with the Chesapeake Area Bowhunters, which can be terminated if desired or transferred to the new owners with a possible prorated reimbursement. * * Well Inspection * * : A well inspection was completed to document the well on record with Harford County, following renovations of the cottage between 2021-2023.
Single-familyProperty Type
1800Year Built
44.97 acresLot Size
$178Price/Sq.Ft.
12 car garageParking
Listed by Tressa Manna• RE/MAX Advantage Realty
•443-573-9200 (broker)
Listed by Ron Howard• RE/MAX Advantage Realty
•443-573-9200 (broker)
Bought with Dustin Prievo• Whitetail Properties Real Estate, LLC
Est. $4,046 per month, based on comparable rentals
Sale and tax history for 3660 Mill Green Rd
Sale History
Tax History
Date
Event
Price
BRIGHT MLS #MDHR2040174
May 29, 2026
Sold
$1,395,000
$178/sq ft
Mar 29, 2026
Contingent
—
Jan 15, 2026
Relisted
—
Nov 25, 2025
Contingent
—
Sep 29, 2025
Price Changed
$1,395,000
$178/sq ft
Jul 30, 2025
Price Changed
$1,450,000
$186/sq ft
Jun 27, 2025
Price Changed
$1,499,000
$192/sq ft
Jun 12, 2025
Price Changed
$1,525,000
$195/sq ft
May 28, 2025
Price Changed
$1,550,000
$198/sq ft
Apr 22, 2025
Price Changed
$1,599,000
$205/sq ft
Apr 3, 2025
Price Changed
$1,650,000
$211/sq ft
Mar 16, 2025
Price Changed
$1,750,000
$224/sq ft
Feb 26, 2025
Listed
$1,850,000
$237/sq ft
BRIGHT MLS #MDHR2033472
Dec 3, 2024
Listing Removed
—
Nov 13, 2024
Price Changed
$1,750,000
$224/sq ft
Oct 21, 2024
Price Changed
$1,845,000
$236/sq ft
Oct 7, 2024
Price Changed
$1,895,000
$242/sq ft
Sep 20, 2024
Price Changed
$1,950,000
$249/sq ft
Sep 10, 2024
Price Changed
$1,975,000
$253/sq ft
Aug 28, 2024
Price Changed
$2,000,000
$256/sq ft
Jul 26, 2024
Listed
$2,100,000
$269/sq ft
Jul 12, 2024
Coming Soon
*
BRIGHT MLS #MDHR238024
Apr 1, 2021
Listing Removed
—
Mar 31, 2021
Sold
$1,050,000
$134/sq ft
Dec 22, 2020
Pending
—
Aug 29, 2019
Listed
$1,250,000
$160/sq ft
+80
Always wanted to own an entertainment venue? A day camp? A bed and breakfast? What about a brewery? Or you could just call it home! Don t miss the opportunity to own this one-of-a-kind property with many potential uses. Do you have horses? No problem. The 3 stable barn and paddock can accommodate. Do you collect cars? The garage can easily fit 12. Do you enjoy entertaining? Friends and family will love the 6,000+ square foot home with chef s kitchen and lower level ice cream shop, tennis and basketball courts and stunning vistas. Spend a lazy weekend fishing or tubing in Broad Creek, right in your backyard. Prefer a swimming pool? The koi pond could easily be converted back. The original 4 level mill has tons of charm and the beautiful landscaping can be seen from every vantage point. The property also boasts a 3 bedroom, 2 bath guest cottage. If this unique 45 acre paradise sounds like what you ve been looking for, don t wait. It could be yours.
BRIGHT MLS #MDHR237338
Apr 1, 2021
Listing Removed
—
Mar 31, 2021
Sold
$1,050,000
$134/sq ft
Dec 22, 2020
Pending
—
Aug 22, 2019
Listed
$1,250,000
$160/sq ft
BRIGHT MLS #1001848366
Sep 15, 2018
Listing Removed
—
Jun 13, 2018
Listed
$1,100,000
$141/sq ft
MRIS #HR10269090
Sep 15, 2018
Delisted
—
Jun 13, 2018
Listed
*
MRIS #HR10050719
Jun 13, 2018
Delisted
—
Sep 11, 2017
Listed
*
BRIGHT MLS #1000113241
Jun 13, 2018
Listing Removed
—
Sep 11, 2017
Listed
$1,550,000
$198/sq ft
Public Records
Oct 17, 1997
Sold
$1,200,000
$154/sq ft
Public Records
Oct 17, 1988
Sold
$300,000
$38/sq ft
Year
Property tax
Land + Additions
Assessment*
2025
$8,172 (+8.0%)
2024
$7,568 (+6.7%)
2023
$7,096 (−0.7%)
$189,900 + $686,200
$876,100
2022
$7,147 (+211.6%)
2021
$2,293
Public record
Public record
Zoning
Permits
Beds
—
Baths
3
Stories
2
Lot width
—
Lot depth
—
Lot size
44.97 Acres
Year renovated
—
Sq. Ft.
6,736
Year built
1800
Style
Single Family Residential
County
Harford County
APN
05 031257
Parking Spaces
—
Basement
—
Accessible
—
HOA Dues
—
Garage
—
Features
—
Last updated by owner on Jul 17, 2026.
AG
Agricultural District
The purpose of this district is to provide for continued farming activities, conserve agricultural land and reaffirm agricultural uses, activities and operations within the agricultural zoned areas. It is the further purpose of this district to maintain, and promote, the rural character of this land as well as promote the continuance and viability of the farming and agricultural uses.
Permitted uses
Include but are not limited to:
Agriculture
Greenhouse / nursery
Religious facility
Housing-Single unit
Infrastructure
Fire house
Library
Park & open space
Aug 3, 2023 • Final
Building (residential) - addition
Renovate and reconfigure a tenant dwelling. Construct an addition to connect the dwelling to a detached garage and build a two-story addition. Install a patio with a pergola.
Addition
Aug 2, 2023 • Final
Fuel gas (residential)
Install an above ground propane tank and run a gas line to a stub out.
Gas
Permit history is from public records and may be incomplete or inaccurate. Redfin and its agents make no representations about the property condition or permit status. Buyers should independently verify all information.
Other Structures: Barn, Garage(s), Guest House, Shed
Exterior Information
Awning(s), Extensive Hardscape, Sidewalks, Sport Court, Stone Retaining Walls, Tennis Court(s), Water Fountains
Lot Information
Lot Features: Backs to Trees, Corner, Landscaping, Partly Wooded, Private, Secluded, Stream/Creek, Trees/Wooded
Has Water View
Tidal Water: No
Above Grade Information
Finished Sq.Ft.: 7,816
Finished Sq.Ft. Source: Assessor
Below Grade Information
Unfinished Sq.Ft.: 3,600
Unfinished Sq.Ft. Source: Assessor
Finished Sq.Ft. Source: Assessor
Financial
Tax Information
Tax Assessed Value: $876,000
Tax Year: 2024
Tax Annual Amount: $9,549
Utilities
Utilities Information
Fixed Wireless
Central Air
Cooling Type: Central A/C, Ceiling Fan(s)
Cooling Fuel: Electric
Forced Air, Heat Pump(s)
Heating Fuel: Electric
Hot Water: Electric
Sewer Septic: Septic Exists, Septic Pump
Propane
Water Source: Well
Location
School Information
Elementary School: NORTH HARFORD
Middle Or Junior School: NORTH HARFORD
High School: NORTH HARFORD
School District Name: HARFORD COUNTY PUBLIC SCHOOLS
Elementary School Source: Listing Agent
Middle School Source: Listing Agent
High School Source: Listing Agent
School District Source: Listing Agent
Location Information
Outside City Limits
Cross Street: prospect road
Directions: Ady Road/Route 543 to Prospect Road/Route 646 to property on the right. Enter at the Mill Green Estates sign. If you reach Mill Green Road, you have gone too far.
Public facts
Beds: —
Baths: 3.0
Sq. Ft.: 6,736
Stories: 2.0
Lot Size: 44.97 acres
Style: Single Family Residential
Year Built: 1800
Year Renovated: —
County: Harford County
APN: 05 031257
Home facts updated by county records on Jul 17, 2026
Around this home
Schools
North Harford Elementary School
Public PreK-5 • Assigned • 4.2mi
7/10
North Harford Middle School
Public 6-8 • Assigned • 4.3mi
6/10
North Harford High School
Public 9-12 • Assigned • 4.0mi
7/10
Provided by GreatSchools
Climate risks
6/10 Flood Factor
Estimated 70-78% chance of a flood reaching the building in the next 30 years
1/10 Fire Factor
Unlikely to be in a wildfire in next 30 years
6/10 Heat Factor
7 days above 104° expected this year, 15 days in 30 years
4/10 Wind Factor
20% chance of strong winds in next 30 years
3/10 Air Factor
2 unhealthy days expected this year, 4 days in 30 years
Provided by First Street
Historical weather
Street, MD • 21154
Average low and high temperatures (°F)
35
22
40
26
58
37
66
46
71
54
81
64
86
70
78
61
75
59
66
46
55
38
41
27
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sun exposure
86/ 100
Very good sunlight
Sunscore
There appears to be minimal shading by surrounding buildings, terrain, and vegetation.
10.9 hrs
6.8 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$1.45M – $1.75M
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