Sixteen years ago, this Toronto house sold for $2.45 million.
Now it's back on the market for $12,200,000.
While Toronto real estate prices have climbed dramatically over that period, it's not the housing market alone that's responsible for the nearly $10 million jump.

The living room with two fireplaces.
The home at 10 McKenzie Ave. has undergone one of the most ambitious architectural transformations you'll find anywhere in the city.

The kitchen joining the old and new parts of the house.
Originally designed in 1908 by architect William Alexander Langton for a woman known simply as Mrs. Eleanor, the Rosedale residence spent years undergoing a meticulous redesign that preserved its historic exterior while completely reinventing what lies behind it.

A bedroom.
And when we say reinvented, we mean reinvented.

The dining room.
Behind the stately Neo-Georgian facade is a strikingly contemporary interior created by architect Pat Hanson of gh3.

The living room.
The result is one of the most dramatic old-meets-new residential projects currently on the Toronto market, and the transformation even caught the eye of some design magazines.

A bedroom that spans the entire third level of the house.
The interiors of 10 McKenzie Ave. have been featured in Azure Magazine and Canadian Architect.

A sitting room or bedroom.
The interior embraces a monochromatic palette of white surfaces, sculptural forms, and carefully controlled light, creating a space designed as much for displaying art as for everyday living.

The other side of the third-floor bedroom.
Unlike many luxury renovations that gut historic homes in favour of sprawling open-concept layouts, this redesign respects the original centre-hall floor plan.

The dining room with original leaded glass windows.
Formal living and dining rooms still flank the entrance, but they're connected by a gallery-like central hall that immediately establishes the home's museum-quality aesthetic.

A bedroom.
Which is exactly what the designers intended.

The extension looking out into the garden.
Created for serious contemporary art collectors, every element has been carefully considered to showcase artwork rather than compete with it.

The library.
Floor-to-ceiling white aluminum fins frame the original openings, emphasizing the contrast between the century-old structure and the minimalist modern interventions.

The staircase.
The undisputed showstopper is the sculptural staircase that rises through the centre of the home.

The perforated screen in the staircase.
Custom-built by master artisans and illuminated by a perforated screen that filters sunlight throughout the day, it's less a staircase and more a functional piece of art.

The backyard.
At the rear of the property, the architecture becomes even more dramatic. A glass-clad addition wraps around the garden — a remarkably rare feature in Toronto residential design.

The family room.
Dropped floor levels create soaring 12-foot ceilings, while a 30-foot wall of glass floods the kitchen and family room with natural light.

The kitchen.
The entertaining space includes both a primary kitchen and a separate prep kitchen, extending toward an oversized 350-square-foot double garage.

The primary ensuite bathroom.
In total, the residence offers 5,574 square feet of above-grade living space, five bedrooms and six bathrooms.

Another bedroom's ensuite bathroom.
But what makes 10 McKenzie Ave. remarkable isn't its size. Toronto has plenty of big luxury homes.

A bedroom.
What's far rarer is finding a property that so successfully balances heritage preservation with genuinely bold contemporary architecture.

The back of the house.
Whether you find the minimalist aesthetic breathtaking or a little too gallery-like for everyday life, there's no denying that 10 McKenzie Ave. is one of the most architecturally significant homes currently for sale in Toronto.