I understand that this all sounds very tedious and problematic. In some sense these two words are a good description of the design/construction process. However, what I have outlined above is done thousands of times every day and most of those homeowners have survived and, as a result, now have the new, beautiful, functional, kitchen of their dreams. You notice I said "most"! Seriously, the project will be challenging and there will be some problems. This is just the nature of design and construction and that is why you should not proceed without experienced professional help throughout the process from the very beginning to the end.
In any case, once you have made the decision of whether or not to expand or re-configure, you will know the size and shape (footprint) of the space that you have available from a horizontal standpoint - Plan View.
* G-Shaped Kitchen - this type of kitchen shape is becoming very popular, and it gives you a fourth wall to use. The G-shape can be used if you have more than one cook in the house. This fourth wall section can be used for a counter, island and storage space. With this kitchen layout you can have two sinks, perhaps two cooktops or two ranges. You could have two working triangles -- one for sink, cook top or range and refrigerator and a second working triangle with another sink, built-in grill and cooktop. It allows two cooks to do different things at the same time and entertain large groups of people.
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