Marsh, E., Hawkins, W., Shea, A., Allen, S., Demski, C., Phelps, P., Barnes, A., Smallwood, C., Richards, S., Daone, R., Bell, A., Nikolaidou, E., 2026. Dataset for "Pioneering Net Zero Carbon Construction Policy in Bath & North East Somerset: Evaluating the effectiveness of novel planning policies over time". Bath: University of Bath Research Data Archive. Available from: https://doi.org/10.15125/BATH-01608.