Data was collected prior and during the project workshop. The workshop participants answered two open-ended questions prior to the workshop via Opinio platform (online). Q1: Main factor preventing success: Briefly state what you think is the main factor preventing greater success in UK domestic retrofit policy. Q2: Main factor driving success: If you were the UK energy minister responsible for driving uptake of domestic retrofit, what would be the one policy you would announce via Twitter? The 1,5-hour project workshop took place on 25th May 2021 via Zoom platform (online). The participants were presented with a novel realistic psychological model of household decision-making regarding domestic energy retrofit, which takes into account the meaningful and emotional realm of homeowner decisions. The participants were then asked to suggest the policies to encourage domestic energy retrofit among UK homeowners, using the model presented. The discussion was held in 10 break-out rooms (Zoom). The workshop concluded with an overall plenary (Zoom). The collected data include: - A record of answers to open ended questions in the pre-workshop survey - 10 transcripts of breakout sessions in 10 Zoom break out rooms. - One transcript for the plenary session. - A record of the workshop chat, which took place via Zoom