Architecture in Dialogue with the Topography: Think Architecture Unveils the Lakeside "House on a Slope" Overlooking Lake Zurich

Swiss architectural practice Think Architecture has once again left an indelible mark on the pristine landscapes surrounding Lake Zurich with its latest residential masterpiece, House on a Slope. Spanning an impressive 1,000 square meters, the sprawling private residence navigates a notoriously challenging topography—a narrow and steeply sloping plot—through a sophisticated arrangement of interconnected volumes clad in dark limestone and cedar.

Rather than dominating the hillside with a monolithic structure, the studio opted for a fragmented yet cohesive typology that respects the human scale and mirrors the quiet, rhythmic vernacular of neighboring properties. The resulting home is a masterclass in topographical integration, material honesty, and spatial storytelling.

Main Facts: Anatomy of a Lakeside Sanctuary

• Project Name: House on a Slope
• Location: Lake Zurich, Switzerland
• Architecture & Design Studio: Think Architecture (Creative Director: Marco Zbinden)
• Floor Area: 1,000 square meters
• Primary Materials: Dark limestone, cedar, bog oak, oak, Belgian bluestone, terrazzo, and patinated brass
• Key Features: Two distinct blocks connected by a subterranean art corridor, extensive glazing, outdoor swimming pool, planted roof terrace, and integrated native landscaping.
• Photography: Nate Cook

Chronology of the Project: From Brief to Realization

The genesis of House on a Slope lay in a complex architectural riddle: how to fit a massive 1,000-square-foot residential program onto a constricted, steeply inclined parcel of land without disrupting the neighborhood’s delicate visual equilibrium.

Phase 1: Conceptualization and Contextual Analysis

In the initial design phases, Think Architecture’s creative director, Marco Zbinden, and his team studied the surrounding lakeside vernacular. They analyzed the quiet rhythm of neighboring houses, their individual proportions, and their distinct modes of sitting within the Swiss hillside. Recognizing that a single, monolithic box would disrupt both the visual flow and the ecological integrity of the terrain, the team made a pivotal design choice: they broke the residence down into smaller, familiar volumes that would feel as though they had belonged to the hillside for generations.

Phase 2: Structural Zoning and Excavation

To manage the drastic grade changes, the design was bifurcated into two primary blocks. The upper structure was aligned with the street level to serve as the primary social and family zone, while the lower structure was embedded more deeply into the slope, offering a protective, grounded environment tailored for children and guests. Excavation required meticulous engineering to preserve the stability of the narrow site while carving out space for the subterranean connector.

Phase 3: Structural Assembly and Material Application

With the foundation secured, the structural framework took shape. The upper block was fitted with expansive glass facades and cedar-clad timber windows, framing dynamic vistas down the hillside. Simultaneously, the lower block was wrapped in heavy dark limestone to anchor it visually to the earth. The two zones were permanently linked via a subterranean art-filled corridor that acts as a gallery and a connective spine.

Phase 4: Interior Fit-Out and Landscape Integration

The final phase focused on bridging the boundary between exterior and interior spaces. Custom millwork, local stones, and patinated metals were installed to create a warm, tactile palette. Concurrently, native trees and foliage were planted in carefully curated pockets within the architecture, ensuring that the mature greenery of the hillside would eventually swallow the building lines and soften its architectural profile.

Supporting Data & Architectural Breakdown

To fully appreciate the scale and functional nuance of House on a Slope, the residence must be examined through its spatial zoning and material specification.

Spatial Zoning and Programmatic Distribution

Materiality and Tactility

Think Architecture curated a restrained yet deeply sensory palette of materials designed to weather gracefully over time. According to Zbinden, the interior architecture is an organic continuation of the exterior skin:

• Bog Oak and European Oak: Used for flooring, millwork, and architectural accents, bringing natural warmth to the living areas.
• Dark Limestone and Belgian Bluestone: Used to ground the lower block and exterior hardscapes, offering monumental weight and geological permanence.
• Terrazzo and Patinated Brass: Applied in high-traffic zones and fixtures, ensuring that surfaces develop a rich patina through daily use.

Official Responses: Insights from Think Architecture

Discussing the conceptual drivers behind the project, Creative Director Marco Zbinden emphasized the delicate balance between architectural ambition and topographical humility.

"The brief was to bring a very large programme into a narrow, steeply sloping site with as much sensitivity as possible," Zbinden explained to Dezeen.

"We were interested in the quiet rhythm of the neighbouring houses, their individual scale, and the way they sit within the landscape. Breaking the residence into smaller volumes allowed us to respond to that context without losing the generosity of the interior. From the outside, the house feels less like a single monumental object and more like a group of familiar structures that have always belonged to the hillside."

Elaborating on how the dual-block layout serves modern family life, Zbinden noted:

"They are intimately connected through a corridor—filled with art—and the central garden level, which becomes the social heart of the home. There, the architecture opens up, materials continue from outside to inside, and the different parts of the family’s life naturally meet."

Regarding the philosophy behind the interior design, Zbinden stated:

"The interiors were conceived as a direct continuation of the architecture, extending its material language into the most private and lived-in spaces. We worked with a limited palette of bog oak, cedar, oak, Belgian bluestone, terrazzo, and patinated brass—materials that are tactile, honest, and become more beautiful as they age. The aim was to create spaces that felt warm and enveloping rather than decorated: quiet rooms shaped by light, texture, and proportion, where one can truly slow down and feel at home."

Implications and Context within Contemporary Swiss Architecture

House on a Slope represents a significant milestone not only for Think Architecture, but also for the broader trajectory of contemporary Swiss residential design. Overlooking the idyllic waters of Lake Zurich, the project adds to a growing portfolio of celebrated residential works by the studio, which includes a minimal hilltop home completed in 2019 and a vineyard-adjacent residence finalized in 2020.

1. Reinterpreting Density in High-End Residential Design

As prime plots of land become increasingly scarce around major Swiss lakes, architects are forced to build on difficult terrains—such as steep slopes, narrow infill lots, and protected green belts. House on a Slope offers a blueprint for how massive residential programs (1,000 square meters) can be successfully integrated into constrained landscapes without triggering local pushback or environmental degradation. By breaking down the massing, the studio demonstrates that luxury and scale do not need to translate into aggressive architectural dominance.

2. The Evolution of Material Authenticity

In an era dominated by synthetic composites and fast construction trends, Think Architecture’s commitment to self-finishing, patinating materials—such as raw cedar, dark limestone, and patinated brass—undersores a broader cultural shift toward sustainable longevity. Buildings are no longer expected to look pristine and static on day one; instead, they are designed to collaborate with nature, absorbing the effects of weather, sunlight, and human touch to become richer with age.

3. Art and Domestic Architecture

The inclusion of a dedicated "subterranean art corridor" points to a growing trend among ultra-high-end residences: the fusion of private art curation with spatial circulation. By turning a necessary architectural connector (the link between the upper and lower blocks) into a habitable gallery space, the architects elevate utilitarian movement into an emotional and cultural experience.

Ultimately, House on a Slope stands as a testament to the power of contextual sensitivity. By listening closely to the contours of the Zurich hillside, Think Architecture has delivered a home that is simultaneously monumental and intimate, modern and timeless.