Portfolio project
A low-energy house in a conservation area

Tom Hughes

Replacing a 1980s bungalow on an infill site in a Nottinghamshire village, the design of this house had to complement the Conservation Area setting whilst achieving extremely high performance as a “zero carbon in use” eco-home. Designed using the PassivHaus Planning Package and executed in a palette of brick, oak, slate and zinc, the house includes a central frameless glazing porch and open stair, an integrated balcony and an extensive built-in photovoltaic array.

The south facade, designed to maximise winter solar gains while providing shading in summer, . Photovoltaic panels and rooflights are integrated into the slate roof.

Our client required a contemporary home that could be built to achieve extremely high energy performance in use. Their site was carefully selected within a characterful village setting, approached from the main village street to the North and having a good southerly aspect for solar collection. Alongside the development of our client’s brief and requirements, we carried out a careful analysis of the village layout and the materials and massing of surrounding buildings.

The house has performed well and we are very happy with its aesthetics, comfort and technical performance. It blends in well with the village despite being obviously modern. Many passers by stop to enquire and pass comment on the house, usually very favourably. We often see cars slowing down in the road outside, almost stopping to catch a second glance.

All the energy bills for the first year of occupation, plus the running of an electric car and water rates, were covered by the return from the solar panels, leaving us only Council Tax to pay!
Roger Bell, client

In a sensitive planning context the design was developed in close consultation with the local planners and community, documented through an in-depth Design and Access Statement. The delicate balance between achieving PassivHaus design targets and satisfying Conservation Area planning requirements meant that the design was evolved and presented in various contexts. A consultation on site in the existing bungalow saw a 20% turnout of the village giving unanimous support for the scheme.

The design uses the north facade to address the village setting and large windows and solar roof to the south to maximise useful solar gain and collection. The requirement to reduce north facing glazing to meet PassivHaus design targets is offset by the provision of a frameless-glazed porch, which prevents the escape of warm air whilst providing an open welcome to visitors.

The North facade and street front, a contemporary response to the surrounding buildings of the Conservation Area.

The smaller windows and variegated massing on this side of the house respond to the scale of the village, whilst the private rear of the house presents a single expanse of roof for solar collection, free of any self-shading projections. An integrated system of flush-fitting photovoltaic panels and rooflights was selected to create a smoothly integrated roofscape. Excess heat gain is controlled by the use of integrated external louvre blinds to the large sliding glass doors on the south elevation.

The integrity of the design is maintained by the simple palette of materials: red brick, oak cladding and beams, slate roofs. A small area of zinc roofing over the glazed porch expresses the articulation of the house plan around the double-height circulation zone.

This project was shortlisted in the 2014 RIBA East Midlands Awards.

Design overview (click to enlarge).

Project credits

Contractor: Nick Martin with Branch Construction
Executive architect: Parsons + Whittley