At DJ Reynolds Builders, we specialise in building high-performance, energy-efficient homes that meet the rigorous standards of Passivhaus (or Passive House) design. Based in Cambridge, we combine decades of building expertise with forward-thinking sustainability to deliver homes that are not only environmentally responsible but also comfortable and cost-effective to live in.
What is Passivhaus?
Passivhaus is a leading international building standard that prioritises ultra-low energy consumption, exceptional thermal performance, and indoor comfort. A certified Passivhaus building uses up to 90% less heating and cooling energy than traditional buildings, dramatically reducing both environmental impact and running costs.
Airtight building envelope to eliminate heat loss
High-performance triple-glazed windows
Super insulation for stable indoor temperatures
Mechanical Ventilation with Heat Recovery (MVHR) for fresh, filtered air
Thermal bridge-free construction to prevent heat leaks
Our Expertise in Passivhaus Construction
As experienced builders with a commitment to sustainable construction, DJ Reynolds Builders is proud to offer full design-and-build or build-only services for Passivhaus projects in Cambridge and the surrounding areas. Whether you’re a homeowner, developer, or architect, we can help bring your low-energy building vision to life.
We work with trusted suppliers, use certified materials, and collaborate with Passivhaus designers and consultants to ensure each project meets or exceeds the required standards. From new builds to retrofits, we handle every stage with care, precision, and attention to detail.
Local, Cambridge-based building experts
Proven experience in sustainable and low-energy construction
Transparent communication and reliable project management
Dedicated to quality, compliance, and customer satisfaction
We are proud to be a certified member of the Passive House Institute, a globally recognised organisation committed to energy-efficient building standards. This certification reflects our dedication to sustainable design, high performance construction, and environmental responsibility. As part of this international network, we stay at the forefront of innovation in low-energy building practices, ensuring every project we undertake meets the rigorous criteria of comfort, quality, and exceptional energy performance set by the Passive House standard.
