$12,985,000
728529 21st Sideroad
Blue Mountains, Ontario N0H1J0
For sale· Added
About this property
Majestically positioned upon eighty pristine acres within Clarksburg's most distinguished countryside enclave, this Frank Lloyd Wright-inspired architectural tour de force represents the pinnacle of luxury residential design. Approached through monitored gates and a winding driveway, this extraordinary five-bedroom, seven-bathroom estate exemplifies uncompromising craftsmanship, where the masterful fusion of Corten steel, cedar, and metallic exterior elements creates a striking modern silhouette set against a magnificent natural backdrop, enhanced by dramatic landscape lighting that elevates the estate's grandeur through twilight hours. The palatial interior reveals soaring eighteen-foot ceilings and resplendent marble floors, culminating in an open-concept masterpiece with polished concrete flooring and 12.5 ft. floor-to-ceiling windows framing the serene landscape. The Varenna Poliform kitchen impresses with a 20.5 ft. island, Sub-Zero and Wolf appliances, 11 ft. ceilings, and bespoke walnut cabinetry that flows with architectural harmony throughout. The lavish two-storey primary suite offers polished plaster walls, custom walnut built-ins, a marble ensuite with chronotherapy rain shower, and a private retreat lounge. Additional bedrooms include terraces or balconies, with two guest suites offering luxurious ensuites-one serving as a secondary primary with service bar. Entertainment abounds with a professional theatre, custom gym, and stunning two-storey lounge bar overlooking a 22 ft. infinity pool. A heated five-car garage and radiant flooring ensure year-round comfort. A separate two-storey guest house includes a full kitchen, loft bedroom, and soaring ceilings. A pristine barn provides premium equestrian facilities. Landscaped grounds feature a fire pit, hot tub, and pergola, all enhanced by elegant lighting. With Loree Forest nearby and a Generac generator, this estate blends architectural brilliance with modern sophistication.
Location
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Property details
Listing
- MLS® number
- X13868914
- Added
- Oct 6, 2026 ()
- Updated
- Oct 6, 2026 ()
- Info refreshed
Overview
- Property type
- Agriculture
- Storeys
- 2
Inside
- Bedrooms
- 6
- Bathrooms
- 7
- Half baths
- 3
- Heating
- Other
- Cooling
- Air exchanger
- Fireplace
- Yes
- Appliances
- Central Vacuum, Intercom, Oven - Built-In, Water Heater - Tankless
- Features
- Guest Suite, Sauna
Building
- Basement
- None
- Exterior
- Steel, Concrete
- Parking
- Garage · 30 spaces
Land
- Lot size
- 1753 x 1951 ft
- Pool
- Above ground pool
- Zoning
- A1 H
Services
- Utilities
- Electricity, Cable
Location
- Cross streets
- Sideroad 21 and 6th Line
- Directions
- From Hwy 26 turn onto Grey Road 40, left onto 7th line, left onto side road 21, property is on the left.
Running costs
- Annual property tax
- $18,136
Rooms
| Foyer | Main level | 6.07 x 6.56 m |
| Laundry room | Second level | 1.92 x 2.71 m |
| Kitchen | Main level | 7.35 x 7.48 m |
| Study | Second level | 9.45 x 8.69 m |
| Exercise room | Second level | 5.11 x 6.07 m |
| Bedroom | Second level | 2.92 x 2.92 m |
| Bedroom | Second level | 3 x 4.03 m |
| Other | Second level | 2.53 x 2.32 m |
| Dining room | Main level | 4.73 x 7.48 m |
| Primary Bedroom | Main level | 7.67 x 6.56 m |
| Living room | Main level | 6.2 x 8.63 m |
| Bedroom | Main level | 3.47 x 5.39 m |
| Bedroom | Main level | 7.78 x 7.48 m |
| Other | Second level | 8.13 x 6.45 m |
| Media | Second level | 5.07 x 5.15 m |
| Utility room | Second level | 5.28 x 5.67 m |





