Sustainable House Renovation in Denmark: Houses Within the House by Jesper Kusk Arkitekter

A New Approach to Renovation

Every year, Denmark sees the demolition of around 1,100 single-family homes, often replaced with modern constructions. However, Jesper Kusk Arkitekter’s Houses Within the House project redefines the narrative by showcasing sustainable renovation as a practical and eco-conscious alternative. Located in Birkerød, Denmark, this 220 m² project revitalizes a 1967 home by architect Steffen Hougaard, blending sustainability, modern design, and functionality.

Why Renovate Instead of Demolish?

1. Environmental Impact of Demolition

Demolishing homes is rarely a sustainable choice. The construction industry contributes significantly to global carbon emissions. By repurposing and upgrading existing structures, we can reduce waste and preserve architectural heritage.

2. Rethinking Housing Dreams

This project demonstrates how thoughtful renovations can fulfill modern housing needs while preserving the original essence of a home, ensuring sustainability without compromising on comfort or aesthetics.

Design Concept: Houses Within a House

1. Original Qualities with a Modern Touch

The renovation retains the home’s original geometry while introducing a green-painted wooden extension that blends harmoniously with the existing structure. This addition preserves the mid-century charm while adding a unique modern character.

2. Emphasizing Daylight and Nature

Daylight and garden views are central to the design:

• Skylights: Introduced to maximize natural light and ventilation.
• Garden Connection: Large windows with built-in benches create a seamless transition between indoors and outdoors.
• Pitched Ceilings: Mimic individual “houses within the house,” enhancing spatial diversity and openness.

Sustainability at the Core

1. Biogenic Materials

Wood is the primary material used, reducing the project’s CO2 footprint:

• Bamboo Flooring: Durable and eco-friendly.
• Birch Plywood Walls: Provide a warm, natural interior finish.

2. Energy and Water Efficiency

• Insulation: Upgraded to improve energy efficiency.
• Rainwater Harvesting: A buried water tank collects rainwater for toilet flushing, reducing water consumption.

Functional Design for Modern Living

1. Built-In Furniture

The renovation includes custom furniture to optimize the use of space, ensuring functionality while maintaining aesthetics.

2. Healthy Indoor Climate

Natural ventilation through skylights creates a comfortable living environment, while the use of non-toxic materials promotes health and sustainability.

Collaborative Design Efforts

Architectural Collaboration

The project was executed by Jesper Kusk Arkitekter with input from THKR and Regnestuen. Landscape design by LoBe Landskab and lighting by Iben Winther Orton enhance the home’s harmony with its surroundings.

A Blueprint for Sustainable Living

Houses Within the House is a testament to the potential of sustainable renovation. By rethinking the way we approach outdated homes, this project highlights the possibilities of combining heritage preservation with modern design and eco-conscious practices. Jesper Kusk Arkitekter’s work sets a benchmark for sustainable housing in Denmark, offering an inspiring model for future projects.

All photographs are work of Lars Rolfsted Mortensen