Planning permission is not normally required for maintenance/replacement of a kitchen though if you live in a listed building you should check with your local planning authority.

If you want to install fittings such as a kitchen sink within your home, or any other type of building, the building regulations will apply.

Building regulations will apply if the work involves installing an additional fitting or fittings.

Pay close attention to energy ratings and features of appliances. Look for A-rated (energy efficient) kitchen appliances. Also look for aerated taps, which reduce water use..