1\begin{longtable}{llrl}2\caption{Research gaps: characteristics with fewer than ten extracted studies}\label{tab:gaps}\\3\toprule4Group & Characteristic & studies & evidence status \\5\midrule6\endfirsthead7\multicolumn{4}{l}{\textit{(continued)}}\\8\toprule9Group & Characteristic & studies & evidence status \\10\midrule11\endhead12\bottomrule13\endfoot14B. Interior & Kitchen quality & 9 & pooled \\15B. Interior & Bathroom quality & 3 & descriptive only \\16B. Interior & Appliances & 1 & descriptive only \\17B. Interior & Flooring & 4 & descriptive only \\18B. Interior & Insulation & 3 & descriptive only \\19B. Interior & Storage & 9 & pooled \\20B. Interior & Luxury finishes & 3 & descriptive only \\21B. Interior & Smart-home systems & 0 & no study \\22C. Exterior & Landscaping & 5 & descriptive only \\23C. Exterior & Outdoor kitchen & 0 & no study \\24C. Exterior & Private recreation & 6 & descriptive only \\25D. Location & Walkability & 3 & descriptive only \\26D. Location & Distance to airport & 6 & descriptive only \\27E. Environment & Wildfire risk & 1 & descriptive only \\28E. Environment & Water quality & 6 & descriptive only \\29E. Environment & Urban heat & 2 & descriptive only \\30F. Neighbourhood & Unemployment & 6 & descriptive only \\31F. Neighbourhood & Vacancy & 4 & descriptive only \\32G. Market & Time on market & 2 & descriptive only \\33G. Market & Market liquidity & 3 & descriptive only \\34G. Market & Foreclosure status & 1 & descriptive only \\35G. Market & Distressed sale & 1 & descriptive only \\36G. Market & Seller urgency & 0 & no study \\37G. Market & Mortgage conditions & 0 & no study \\38H. AI-derived & Text sentiment & 0 & no study \\39H. AI-derived & Renovation descriptions & 0 & no study \\40H. AI-derived & Architectural style & 2 & descriptive only \\41H. AI-derived & Luxury language & 0 & no study \\42H. AI-derived & Urgency language & 0 & no study \\43H. AI-derived & Image-based condition & 1 & descriptive only \\44H. AI-derived & Visual quality & 1 & descriptive only \\45H. AI-derived & Interior design & 0 & no study \\46H. AI-derived & Multimodal embeddings & 3 & descriptive only \\47\end{longtable}48