Building an ensuite can add value – but do you have the space? These are the minimum measurements you need to squeeze one in

Pink bedroom with ensuite.

If you can squeeze an en-suite or supplementary bathroom upstairs, you can add between three and six per cent to the value of your home. Typical outlay starts around £3,500 (depending on size, fittings and work needed).

However, the added value and improved household functionality only work if you have enough room to accommodate an en-suite without seriously compromising the size and functionality of your bedroom.