This paper explores data and methods to assess the alignment or misalignment with climate mitigation objectives of investments in the construction and refurbishment of residential and non-residential buildings. It takes the United Kingdom (UK) as a case study, where such investments reached GBP 162 billion (EUR 184 billion) in 2019 or 39% of UK gross fixed capital formation. The analysis trials different reference points that lead to varying results and each currently come with limitations in terms of coverage or granularity.