This research explores the business case for sustainability as experienced by small and medium sized, house building construction companies in the UK and Sweden. The authors investigate what benefits, if any, these businesses have gained from adopting environmental and socially responsible business practices. The authors also set out to understand the barriers and drivers influencing the companies in respect of sustainability. The purpose of the thesis was to help sustainability practitioners in their work with the sector. The research had three separate strands of investigation; interviewing industry experts who had wide experience of the sector; interviews with companies that had some relevant experiences; and a detailed survey was sent to companies asking them to rate their experiences to date and estimate their future expectation on sustainability issues. The findings were collated, analyzed and an overview of the benefits, barriers and drivers for the sector were discussed. A sector specific strategic approach to dealing with the companies was presented for use by the practitioners.