Rare waterfront family home set in the Old Village of Rockcliffe Park. Set on a 42,000+ square foot lot along the shores of Mackay Lake, this notable lakefront residence represents an offering seldom seen. This is a home that has long drawn admiration for its setting, privacy, and quiet luxury. Inspired by the coastal architecture of Maine and Nantucket, the home carries a timeless beauty. The property has a private dock and southern and western exposures bring light across the grounds throughout the day. A gracious front veranda and three well-placed balconies, accessed from the family room, primary suite, and ensuite bathroom, extend the living spaces outward and frame uninterrupted lake views. Nearly every principal room is oriented to the water, creating a calm and picturesque backdrop. The landscaped gardens and flagstone terraces offer privacy and natural beauty, while a triple garage, rarely found in the Old Village of Rockcliffe Park, adds a practical distinction. Properties of this calibre in Rockcliffe Park are held for generations and rarely offered to market. This is a singular opportunity to acquire one of Rockcliffe Park's true dream properties, a landmark home with a low heritage rating in an extraordinary setting.
Key Facts:
Tax:
$40,295 / 2026
Property Type:
Detached
Sq. ft. size
3500-5000 sq. ft.
Lot Size:
133.87 x 231.74 feet
Lot Irregularities:
LT 5, PL 260 ; ROCKCLIFFE PARK
Parking:
Detached garage (3), 8 spaces in total
Basement:
Part Bsmt, Part Fin
Possession:
2026-08-01
Listing #:
X12930804
Days on Site:
222 days
Status Change:
6 days ago
Added to CiRealty:
2026-03-27
Updated on:
2026-10-28
Market Demand:
Buyer’s Market
Balanced
Seller’s Market
Property Details
Property details for 597 Mariposa Ave, Ottawa. Listed for $4,990,000 on 2026-03-27
Property
Property Type:
Detached
Style:
3-Storey
Community:
Rockcliffe
Municipality:
3201
Inside
Bedrooms:
4
Bathrooms:
5
Bathrooms Detail:
1 × 2pc, main floor
Bathrooms Detail:
1 × 2pc, basement
Bathrooms Detail:
1 × 4pc, 2nd floor
Bathrooms Detail:
1 × 6pc, 2nd floor
Bathrooms Detail:
1 × 4pc, 3rd floor
Kitchens:
1
Rooms:
23
Family Room:
Yes
Den:
Yes
Fireplace:
Yes
Central Vac:
No
Utilities
Water:
Municipal
Cooling:
Central Air
Heating Type:
Forced Air
Building
Size:
3500-5000 sq. ft.
Construction:
Shingle
Parking
Garage Type:
Detached
Garage Spaces:
3
Driveway:
Circular, Private Triple
Driveway Spaces:
5
Total Parking Spaces:
8
Land
Sewer:
Sewers
Frontage:
133.87 feet
Depth:
231.74 feet
Cross Street:
Mariposa Avenue & Lisgar Road
Property
Property Type:
Detached
Style:
3-Storey
Community:
Rockcliffe
Municipality:
3201
Building
Size:
3500-5000 sq. ft.
Construction:
Shingle
Parking
Garage Type:
Detached
Garage Spaces:
3
Driveway:
Circular, Private Triple
Driveway Spaces:
5
Total Parking Spaces:
8
Inside
Bedrooms:
4
Bathrooms:
5
Bathrooms Detail:
1 × 2pc, main floor
Bathrooms Detail:
1 × 2pc, basement
Bathrooms Detail:
1 × 4pc, 2nd floor
Bathrooms Detail:
1 × 6pc, 2nd floor
Bathrooms Detail:
1 × 4pc, 3rd floor
Kitchens:
1
Rooms:
23
Family Room:
Yes
Den:
Yes
Fireplace:
Yes
Central Vac:
No
Land
Sewer:
Sewers
Frontage:
133.87 feet
Depth:
231.74 feet
Cross Street:
Mariposa Avenue & Lisgar Road
Utilities
Water:
Municipal
Cooling:
Central Air
Heating Type:
Forced Air
Rooms
Room details for 597 Mariposa Ave, Ottawa. (Listed for $4,990,000 on 2026-03-27)
Foyer (9'6" x 8'11")
Great Rm (23'11" x 20'3")
Mudroom (10'11" x 6'9")
Kitchen (14'4" x 10'6")
Breakfast (10'6" x 9'10")
Dining (20'10" x 11'10")
Family (16'0" x 12'2")
Study (10'10" x 7'11")
Powder Rm (5'2" x 2'8")
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