The place to start when you are designing your dream kitchen is with a dimensional diagram of your kitchen space. On a large piece of graph paper, draw the outline of the kitchen space, including any doors or windows that you will have work around while you design your kitchen. Accurately mark where your plumbing and electrical supplies are located. You can move plumbing and electrical supply points, but this involves more time and money, and it is always easier to accommodate existing service supplies into your design, if practical.
Specify Unique Dimensions _ Not all online kitchen design firms offer this service when you design your kitchen online, but some enable you to specify unique dimensions that vary from the standard sizes. This is very useful because it enables you fill in all your wall space without unsightly spaces. So you might want one cabinet a few inches wider or narrower to completely fill a wall either side of your cooker, for example. This service tends to be offered by firms that customize their furniture for their clients _ generally found only with true craftsmen that hand_make their kitchen furniture to order.