Planning Permission & Building Regs in York
Replacement windows must comply with Part L (min 1.4 W/m²K). In York Conservation areas, uPVC is strictly prohibited on highway-facing elevations.
Strict Article 4 Directions apply across the Historic Core (Zone 1) and Clifton conservation areas. Unpainted timber sash windows, natural Welsh slate or handmade clay pantiles, and retention of original brick chimneys are strictly mandatory.