What size extension can I build without planning permission?
The permitted development rules have recently been relaxed, allowing you to build an extension without planning permission of up to six metres (or eight metres if your house is detached)..
What is the cheapest way to build an extension?
Do It Yourself Wherever Possible Do-It-Yourself projects can save you a bundle when you’re building home extensions. Some of the best DIY house extensions money-saving projects include painting, tile work, some flooring installation, adding a window bench seat, or cabinet installation and refinishing work.
How close to my boundary can I build an extension?
Single story extensions to the side of your property to be no more than four meters in height and no wider than half the original size of the property. For those building a double extension on their property, you cannot go closer than seven meters to the boundary.
How much does a single story extension cost UK?
For example, a basic single storey extension would typically cost around £1,000 per square metre but it could be up to £1,600 or more for a premium two storey extension. So a 3 x 5 metre extension would cost £15,000 and up to £50,000 for a two storey, more premium extension.