what is the cost of an extension for a house
A double storey extension can cost between Â£500 - Â£1500 per meter square. Planning costs can cost between Â£1000 - Â£27000, although the average price is around Â£5100.Basic conservatories cost around Â£500 per square metre to supply and fit. If the ground needs levelling this price will increase.hese prices are a rough guideline to what you can expect to pay. A range of different factors will affect the final quote. It is very difficult to give an exact price of what you should expect to pay for an extension on your home. Prices can vary dramatically depending on a number of factors.