The Finest Country Estate in Northumberland County. Commanding 24 acres of rolling countryside with sweeping 360-degree views, this estate offers a rare combination of architectural mastery and natural beauty, just minutes north of Cobourg. Built with uncompromising craftsmanship, the 11,000 sq. ft. residence (7,500 sq. ft. above grade) blends timeless elegance with modern refinement. From the moment you arrive, the landscape sets the stage with meticulously groomed lawns, orchards, and stone installations by celebrated artisan John Shaw-Rimmington that create a sculpted canvas for outdoor living. At its heart, a resort-style pool framed by expansive stone terraces invites both grand entertaining and quiet retreat, while a private trail system winds through forested grounds to a hilltop lookout with panoramic views of Lake Ontario. Indoors, the residence impresses with a soaring great room 16-foot ceilings, marble columns, and a dramatic fireplace balanced by intimate spaces for everyday living. A Downsview-designed chefs kitchen, butlers pantry, and family room elevate both function and comfort. Seven bedrooms and six baths include a private 2-bedroom suite with it's own garage, while the primary retreat offers a dressing room, spa-inspired ensuite with heated floors, and sauna. Geothermal heating/cooling, an attached 3 car heated garage, a detached 2 car garage/shop and curated designer finishes complete this one-of-a-kind sanctuary. A true estate where architecture, landscape, and lifestyle converge at the highest level.
Single-familyProperty Type
6 garage spacesParking
Source:TREB #X12405142
Market trends in Rural Hamilton, ON
Last updated October 2026
Sale-to-list price
--
Median sale price
--
Avg. days on market
--
Recently sold homes
--
Provided by Redfin
Sale history for 3622 Alnwick Hills Rd
Date
Event
Price
TREB #X12405142
Jan 1, 2026
Delisted
—
Oct 27, 2025
Price Changed
$3,950,000
Sep 15, 2025
Listed
$4,100,000
+39
The Finest Country Estate in Northumberland County. Commanding 24 acres of rolling countryside with sweeping 360-degree views, this estate offers a rare combination of architectural mastery and natural beauty, just minutes north of Cobourg. Built with uncompromising craftsmanship, the 11,000 sq. ft. residence (7,500 sq. ft. above grade) blends timeless elegance with modern refinement. From the moment you arrive, the landscape sets the stage with meticulously groomed lawns, orchards, and stone installations by celebrated artisan John Shaw-Rimmington that create a sculpted canvas for outdoor living. At its heart, a resort-style pool framed by expansive stone terraces invites both grand entertaining and quiet retreat, while a private trail system winds through forested grounds to a hilltop lookout with panoramic views of Lake Ontario. Indoors, the residence impresses with a soaring great room 16-foot ceilings, marble columns, and a dramatic fireplace balanced by intimate spaces for everyday living. A Downsview-designed chefs kitchen, butlers pantry, and family room elevate both function and comfort. Seven bedrooms and six baths include a private 2-bedroom suite with it's own garage, while the primary retreat offers a dressing room, spa-inspired ensuite with heated floors, and sauna. Geothermal heating/cooling, an attached 3 car heated garage, a detached 2 car garage/shop and curated designer finishes complete this one-of-a-kind sanctuary. A true estate where architecture, landscape, and lifestyle converge at the highest level.
As the MLS and public records start to fill up, we'll list the details here.
Property details
Public facts
Beds: —
Baths: —
Sq. Ft.: —
Stories: —
Lot Size: —
Style: Single Family Residential
Year Built: —
Year Renovated: —
Region: Northumberland County
Home facts updated by public records on Sep 29, 2026
Around this home
Schools
4.2km
Baltimore Public School
Public, JK-6 • Assigned
9.0km
St. Mary Catholic Secondary School
Public, 9-12 • Assigned
Provided by Local Logic
Lifestyle
Provided by Walk Score and Local Logic
Is this your home?
Track this home’s value and nearby sales activity
Nearby similar homes
Sorry, we don't have any nearby similar homes to display. See all homes for sale in Rural Hamilton