House Extension Cost in Dartford
How Much Does a House Extension Cost in Dartford? A single storey rear extension in Dartford typically costs between £15,000 and £35,000. A double storey extension runs £40,000 to £80,000 or more. Side returns and wrap-around extensions can reach £60,000 to £120,000 depending on size and complexity. These figures vary based on your property type,
March 27, 2026