Welcome to 181 Ontario Street, The Sonning House, one of Cobourg's most prominent historic estates. Originally constructed in 1840 by the Burnet Brothers-the legendary builders behind Victoria Hall, during Cobourg's prosperous pre-Confederation boom. Today, this stunning Georgian Revival stands as a pristine landmark of the era, beautifully restored and seamlessly upgraded with modern efficiencies. This home exudes the grandeur of the bygone era, complemented by a glamorous, and stylish aesthetic. You're captivated the moment you step into the stunning central hall plan, with a grand staircase and soaring 10.5-foot main-floor ceilings adorned with intricate plaster crown molding. Generous, light-filled principal rooms flow effortlessly with opulent details. The sumptuous dining room will host the celebrations and elegant dinner parties, inviting you to linger. The heart of the home is a striking, modern kitchen complete with custom cabinetry and an oversized stone island designed for effortless entertaining. Contemporary conveniences include a main-floor laundry room and a mudroom with direct access to a rare 2-car attached garage. Upstairs, the grandeur continues with remarkable 11.5-foot ceilings and four spacious bedrooms. Oversized windows provide generous views and abundant natural light. The elegant primary suite features a walk-in closet and a luxurious ensuite. Positioned on a gracious, oversized corner lot, this property offers unmatched outdoor living space in the heart of town, adorned with magnificent, mature trees and perennial gardens. Expansive decking and an elegant pergola provide the perfect space for dining al fresco, entertaining, or quiet gatherings. The generous south lawn features a charming cottage for garden storage and a beautiful fieldstone fire pit, perfect for cool evening gatherings. Located just steps from Lake Ontario and the West Beach boardwalk, The Sonning House is the perfect blend of historic romance and modern luxury.
Property Type:
Residential Freehold
Property Sub Type:
Detached
Home Style:
2-Storey
Approx. Age:
100+
Total Approx Floor Area:
3000-3500
Lot Depth:
162'8"49.6 m
Lot Frontage:
165'5"50.4 m
Lot Shape:
Irregular
Direction Faces:
West
Bedrooms:
4
Bathrooms:
3.0
Water supply:
Municipal
Kitchens:
1
Bedrooms Above Grade:
4
Kitchens Above Grade:
1
Rooms Above Grade:
13
Fractional Ownership:
No
Zoning:
RES
Assignment:
No
Heating type:
Radiant
Heating Fuel:
Gas
Fireplaces:
3
Foundation:
Stone
Roof:
Asphalt Shingle
Basement:
Partially Finished
Fireplace Features:
Other
Fireplace/Stove:
Yes
Garage:
Attached
Garage Spaces:
2.0
Other Structures:
Garden Shed
Parking Features:
Private Double
Parking Spaces:
6
Total Parking Spaces:
8.0
Family Room:
Yes
Possession Details:
Flexible
Pool:
None
Link:
No
HST Applicable To Sale Price:
Included In
Assessment Year:
2025
Taxes:
$9,307 /
2026
Assessment:
$- /
2025
Northumberland
Cobourg
Cobourg
Beach, Golf, Hospital, Marina, Park, School
Auto Garage Door Remote, Bar Fridge, Carpet Free, On Demand Water Heater
Landscaped, Privacy, Porch
Alarm System
NIL
All appliances, window coverings, electric light fixtures
Primary bedroom drapery panels, Miele wall unit (to be replaced with a microwave)
Data was last updated June 16, 2026 at 02:15 AM (UTC)
Area Statistics
Listings on market:
137
Avg list price:
$785,000
Min list price:
$369,000
Max list price:
$3,975,000
Avg days on market:
31
Min days on market:
1
Max days on market:
223
These statistics are generated based on the current listing's property type
and located in
Cobourg. Average values are
derived using median calculations. This data is not produced by
the MLS® system.
This website may only be used by consumers that have a bona fide interest in the purchase, sale, or lease of real estate of the type being offered via the website.
The data relating to real estate on this website comes in part from the MLS® Reciprocity program of the PropTx MLS®. The data is deemed reliable but is not guaranteed to be accurate.