This recent competition proposal demonstrates how one can build a two bedroom Passivhaus with exceptionally low energy consumption for less than £45,000. That you can build a truly affordable, really low energy house should surely be more widely understood. You will, however, have to do most of the building work yourself and the house will be simple and compact…not a Grand Design.
The shortlisted design is based on simple tried and tested timber frame construction which has been shown to be straightforward to build by people without previous building experience. The design of the foundations and the frame are refined to reduce costs, improve performance and increase the ease of construction.