Marble is more porous than granite so it requires sealant to be applied more frequently to prevent stains. Since it is not nearly as hard as some other stone countertops, it is best to be used in small sections instead than the primary countertop. Beautiful slate is available in tones of gray, green, purple and black. In room additions it is well worth your money to get an architect involved. The architect is responsible for preparing floor plan layouts, understanding zoning issues, kitchen design goals and other issues. Often, but not always, contractors have their own architect on staff but it might be wise to just go ahead and hire your own. Another thing to consider is the needs of your family. Additions to your brood may require additions to your house, and the kitchen is going to be one of the first spaces that will show the strain of over-use. High traffic in a room wears it out more quickly. Since the kitchen is one of the highest-traffic areas in the house, remodeling it with durable yet attractive materials simply makes good sense. A convenient place to start is with your designer-inquire if she works with anyone regularly, or can make a recommendation. If not, internet research is a good place to start. Many a website maintains lists of kitchen remodel contractors. Be sure to check references and see an example of your chosen contractor's work, if possible. When his bid comes under the others for your renovation your thrilled, but when the work is done you discover mediocre materials and shabby workmanship. Then of course the contractor is nowhere to be found and you discover why;unlicensed. You also discover you can be held reliable for on the job injuries or insurance. They can be enormously helpful with your kitchen remodel, and point out products and design ideas that might not have occurred to you. One of the most important decisions you will make is hiring a contractor, so take you time and do some research. Visit home improvement stores or local remodelers to get a feel for what kind of kitchen remodeling projects they specialize in.