Restrained, Rigorous Palette Defines GH3 Toronto Penthouse Interior

This article examines how the Canadian studio GH3* reimagined a 153-square-metre duplex penthouse in downtown Toronto. The designers stripped the space back to its cast-in-situ concrete structure and applied a restrained palette of white with selective black accents.

The project creates a refined backdrop for the owner’s art collection by prioritizing light and material honesty. Adaptable spatial logic turns the raw structure into a light-filled, gallery-like residence.

Project brief and approach

GH3* approached the renovation by leveraging existing conditions and reconfiguring spaces with restrained detailing. The aim was to reveal the building’s raw concrete while introducing a white sculptural language punctuated by black elements to shape atmosphere and emphasis.

This approach results in a functional environment that feels both sculptural and intimate. Daylight drives spatial depth and texture.

The plan prioritizes flexibility, allowing the apartment to adapt to evolving art and living needs. It maintains a calm, cohesive backdrop for display.

• Strip-back to the original cast-in-situ concrete structure
• Dominant white surfaces to reflect light deeper into the plan
• Strategic black accents to absorb light and create contrast
• Selective detailing to support art collection display
• Open connections to a terrace with city views

The design establishes a hierarchy of spaces that read as white volumes organized around a central spine. Black moments provide depth and focus where needed.

Preserving structure, refining materials

The renovation exposes the building’s raw concrete, allowing its texture and tonal variations to drive the interior atmosphere. A restrained material palette—primarily white—with carefully placed black touches creates a gallery-like backdrop that shifts with daylight.

A defining feature is a white Corian staircase that vertically divides the duplex. It anchors the circulation while providing a clean counterpoint to the matte-black kitchen niche on the upper level.

The kitchen reads as an autonomous element within the open living area. It remains visually connected to its surroundings through its slim proportions and continuous white finish.

A double-waterfall island and matching circular stools reinforce the user’s experience of material precision. A recessed wall niche with office equipment—featuring black lower cabinetry and wood shelving—binds functionality to the home’s minimal aesthetic.

Spatial organization and furniture details

On the lower level, the plan centers around a primary suite and two flexible rooms arranged as white volumes around a central hallway. This supports art viewing, quiet zones, and adaptable spaces for guests or studios.

The upper level is organized around the contrast between a matte-black kitchen niche and an open living area. These spaces are separated by the white Corian staircase that acts as a sculptural divider.

The interior features a restrained sequence of details. A white powder room off the kitchen with a curved-edge basin and a rounded mirror softens the minimalist geometry.

Black lower cabinets and wood shelving in the office niche align with the flooring. This establishes continuity of material language throughout the residence.

Outdoor connection and views

Large sliding glass doors in the living space open onto a terrace furnished for lounging and alfresco cooking. The terrace includes a grill and lounge seating.

This outdoor extension expands the living area and delivers panoramic city views. Daylight reflections and spatial perception are amplified across the white planes and dark accents.

The terrace becomes an integral part of the apartment’s spatial narrative. It links interior precision with urban topography.

Design philosophy and impact

GH3* states that the project leverages existing conditions and employs subtle reconfiguration. It relies on refined detailing to produce a functional, adaptable, and light-filled environment that elevates the apartment’s spatial experience.

For practitioners in architecture and engineering, the case demonstrates how restraint and material honesty can create a sophisticated setting for art and daily life. This is achieved without resorting to maximalism.

The design results in a cohesive, durable architecture that respects structure. It delivers a contemporary, gallery-like atmosphere throughout the duplex.

 
Here is the source article for this story: “Restrained, rigorous” palette enhances Toronto penthouse by GH3*