Conservatory

A single-storey addition with a translucent or transparent roof (glass, polycarbonate) covering at least 75% of the roof area and 50% of the wall area, attached to a dwelling. Conservatories are generally permitted development if below certain size limits and have an independent heating system separate from the main house. When a conservatory is incorporated into the main house (with no separation), it must meet full building regulations including thermal performance.