A century-old monument has received a modern, sustainable upgrade. SPIE, a specialist in technical services, transformed TU Delft’s former Mining Building into a low-energy, future-proof office. The project was commissioned by engineering firm Haskoning and now ranks among the most sustainable office buildings in the Netherlands.

Designed to Perform Beyond Paris Proof

The renovated office meets the strict Paris Proof standard, which allows a maximum energy use of 70 kWh per square metre each year. Impressively, the building now uses only 63 kWh per m² annually.

To achieve this, SPIE installed four heat pumps connected to a thermal energy storage system (WKO). They also replaced all lights with LED, insulated the roof structures, and installed insulating glass to replace the original windows. Furthermore, 604 solar panels were added to the new atrium roof, built over the former inner courtyards.

Sustainable Materials in a Heritage Setting

Project leader Jeroen de Bruin explained that the team insulated the entire exterior with energy-saving, sustainable materials. As a result, the building now operates completely without natural gas.

This approach offers valuable lessons for architects, interior designers, and product developers. It shows how to integrate circular design, sustainable insulation, and renewable energy into historic buildings.

Tackling Monumental Challenges

Of course, renovating a heritage site came with obstacles. The team encountered asbestos, chromium-6, damaged wooden beams, and even wildlife like bats and nesting birds. By working closely with heritage experts from the start, they found practical, eco-friendly solutions.

For example, the wooden structure was reinforced to support new equipment, without damaging the building’s character. This balance between modern function and historical integrity makes the project stand out.

A New Home for 800 People

Haskoning will move 800 employees into the renovated building. Managing such a large project required constant communication. SPIE kept local residents informed with monthly update sessions and worked with students to minimise disruption on campus.

Thanks to this coordination, the team delivered a successful project that meets today’s energy goals while preserving architectural heritage.

Why This Matters for Designers

This renovation is a strong example of sustainable design in action. It highlights how to reuse and modernise existing structures using biobased and energy-efficient materials. For professionals in architecture, interior design, and building renovation, it shows what’s possible when innovation and heritage meet.

Source: SPIE
Photo: Haskoning