Single vs Double Storey Extension in Islington: Which Adds More Value?
Quick AnswerA single-storey rear extension in Islington typically costs £75,000 to £135,000 and adds 8 to 12% to the property value. A double-storey extension costs £110,000 to £200,000 and can add 12 to 20%. Double-storey extensions deliver a lower cost per square metre but always require full planning permission in Islington. For most Victorian terraces […]