Plans for building a house can be very wide because they involve plans by an architect, budget plans based on the owner of the new house. When planning to build the new home you need to consider the area of where you want to build as some home estates have a certain minimums, the style of your house will it be modern, cape dutch style, classical and so on.
The architect will consultant with you to get an idea of what kind of design you need and will also advise a client on the technical aspects like the foundations depending on the gradient of where the house will be built. The client will also need a quantity surveyor to quantify all the materials needed to build the house based on the architects design. Another aspect to consider is when you are designing the house with the architect you need to consider whether you are going green and if so how and in which way. An example would be is your water heating system for the house going to be solar powered, is the house going to insulated so that you do not need to heat up the place a lot to reduce the use of electricity.
Let us not forget that architecture is a highly professionalized occupation, therefore the drawings of the design of the house can cost you quite a bit of money. There are various websites that offer architectural designs where by you register on the sight and then you will be shown a design which you can pay for and have these apparently come at a very reasonable price. These websites also offer floor plans, house plans, brick wall plans, home plans, drawings and building plans.
Once the house is built by this stage you have made plans for the Interior design in terms of the inside look you can link to the outside to compliment as the house will be designed to let in light in a certain way, so an example would be that whichever way the light is streaming into the house you can have your interior design according to that because no use having something you want show that is in the dark.