There are a number of things that you can do in this respect, and if you are thinking about building an extension then you could try to get hold of some recycled bricks, as these can be just as good as new bricks. Not only this, but if you are installing a ceiling then used ceiling tiles can be an excellent thing to go for, as you will be able to save a lot of money on them, and your builder will be able to fit them and make them look as good as new. This saving means that the money you have set aside for your project will go much further, so it is definitely worth some thought.