20.500.12556/DiRROS-32161 Cultural heritage as a structural modifier of rooftop solar deployment a building-level framework for heritage-constrained urban decarbonisation Cultural heritage as a structural modifier of rooftop solar deployment: a building-level framework for heritage-constrained urban decarbonisation Cultural-heritage protection constrains rooftop photovoltaic (PV) deployment across a large share of the European building stock, yet existing solar cadastres ignore heritage-related regulatory constraints and therefore systematically overestimate deployable capacity in historic urban environments. This study develops and applies a heritage-aware framework that integrates building-level energy-demand modelling, a geographic information system (GIS)-based rooftop PV cadastre and scenario-based interpretation of heritage regulations to assess realistic decarbonisation pathways for heritage-constrained building stocks. Applied to the Municipality of Maribor, Slovenia (27,249 buildings), the framework shows that formally protected buildings (10.3% of the stock) account for 31.9% of technically suitable rooftop area — more than three times their share. Across five heritage-based scenarios, deployable PV potential ranges from 68% to 93% of the technical baseline (≈308–422 GWh/yr against 452.55 GWh/yr), determined primarily by institutional interpretation rather than the legal framework. Under deep electrification toward 2050, rooftop PV cannot achieve municipal self-sufficiency, leaving a residual gap of 8–22% of demand; notably, deeper renovation without relaxed PV admissibility widens rather than narrows this gap, showing that renovation depth and PV admissibility are complementary policy levers. Heritage protection thus acts as a structural modifier rather than a binary barrier, providing a transferable basis for integrating heritage constraints into solar cadastres, urban energy planning and national renovation strategies. solar cadastre urban energy planning decarbonsation rooftop photovoltaics fotovoltaika na strehah energetsko načrtovanje razogljičenje osončenost streh objektov true false true Elsevier Nizozemska Angleški jezik Slovenski jezik © 2026 The Authors. Neznano 2026-08-28 12:29:19 2026-08-28 12:29:20 2026-08-29 04:22:49 0000-00-00 00:00:00 2026 0 0 Nasl. z nasl. zaslona; Opis vira z dne 13. 8. 2026; str. 1-17 pt. A, [article no.] 128610 Vol. 426 Dec. 2026 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2026-05-27 2026-08-01 2026-08-04 620.92/.98 1872-9118 10.1016/j.apenergy.2026.128610 287720195 https://www.sciencedirect.com/science/article/pii/S0306261926012663 1 5bd5dd68-a2cb-11f1-b645-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=50163 RAZ_Stegnar_Gasper_2026.pdf RAZ_Stegnar_Gasper_2026.pdf 1 AB8931B13397D23B4D54BB5281AF76ED e8c6608fcba5295835feb0e34d05e73dd7ee964080cdfb47280b6fc9199da6f6 9ea7c649-a2cb-11f1-b645-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=50165 Institut Jožef Stefan 0 0 0