The bedroom. In the UK houses are described by how many bedrooms they have. This house would be a 3 bedroomed house. The main bedroom is called the master bedroom, and if a bedroom has its own bathroom, it is called an ensuite.
A dressing room or walk in wardrobe, is a luxury in the UK housing market, usually each bedroom would have a wardrobe or fitted wardrobes.
The family bathroom. In the UK the bath / shower and the loo are usually upstairs. In a government poll 47% of Brits would prefer a bath, and 43% a shower. Some houses have a wet room.
Open plan living is very popular in the UK. Instead of a separate lounge / dining room / kitchen, you will often find the rooms have been knocked through to form one room. This room would be described as a kitchen / diner. The kitchen is considered the heart of the home.
A lounge / sitting room. Does what it says on the label.
A cellar is a luxury in the UK. They have to be well built and properly water proofed, because of the weather. This room is being used as a pantry / storage area.
The boiler room. In the UK boilers are often quite small and installed in the kitchen.
A laundry room is also a luxury. Usually the washing machine is installed in the kitchen, along with the other white goods.
A garage is another luxury in the UK. It adds value to any property, as the alternatives are off road parking, or on street parking.
Attic - Most houses in the UK have an attic. Nowadays many people convert the dusty old space that used to be used to store suitcases and clutter into extra accommodation. Perhaps an extra bedroom, or an office. This house has converted the attic into two bedrooms.