Interior design looks at the process of redefining the spaces within your home according to the type of lifestyle that you lead, whilst interior decorating is all about the finish you want to give to your home in respect of paint, window coverings (curtains or blinds), wallpapers and the soft furnishings etc.
You will find that interior design is actually based around the actual architectural design of your home and will involve the room layout, what style of cabinets you require, and where windows and doors are placed.
However, when looking to carry out an interior design of your home there are a number of factors that need to be taken into consideration, namely the how many, the size and the types of rooms that are in your home. Usually you will be looking at the living room, kitchen, bedroom(s), bathroom and sometimes if you have one a home office (study) for the make over. If you wish these rooms can then be further divided up into say a guest room, dining room, child's room or an adult room for example. There are a large number of issues that need to be taken into consideration when carrying out a redesign of the interior of your home such as cabinet making, the layout of the rooms, where windows are, along with the appliances that you will require. You will also need to consider the type of floor or tiles you would like that would suit each room that is being redesigned, don't forget each room has a different purpose within the fabric of the home.
Really at the end of the day if you are deciding to carry out a redesign of the interior of your home there is one major factor that really need to be thought about prior to starting any work and this is:-
What rooms actually need to be improved?