Sustainable Extensions Across South Yorkshire
Building sustainably doesn't mean compromising on quality or design. At L+P Mullen, we build extensions that are designed to be energy-efficient, better insulated, and kinder to the environment without sacrificing the craftsmanship and finish our clients expect.
Whether you're looking for a Passivhaus-inspired extension, a highly insulated single storey build, a green roof, or simply want to make the most of solar gain and natural ventilation in your new space, we'll work with you and your architect to deliver it properly.
What Makes an Extension Sustainable?
The most effective sustainable features are often the simplest: excellent insulation, good airtightness, thermal mass, triple glazing, and careful orientation. We understand these principles and build to them. We can also incorporate solar panels, rainwater harvesting, underfloor heating, and MVHR ventilation systems as part of the wider build.
- High-performance insulation and airtight construction
- Triple glazing and thermally broken frames
- Green and sedum roofs
- Solar panel integration
- Underfloor heating systems
- MVHR (mechanical ventilation with heat recovery)
- Rainwater harvesting
- Sustainably sourced timber and materials
