Safety First! You are better off without it if you are using up all the free space in the room. Your kitchen should be spacious and you should never feel restricted in your movement - in fact it can be dangerous if you are. Yes, a kitchen island is good to have, but not if your safety and freedom of movement are compromised to accommodate it.
Consider the Services ; If you need a power supply for appliances, you can run it up through a pipe or conduit up to the ceiling, or even better, run a line below the floorboards up into the kitchen island. Make sure your installation conforms to local and national regulations. You are advised to employ a qualified electrician to do this.
Regarding colors and designs, kitchen islands can be made from a number of different materials. The framework is usually wood, but the main visible surfaces could be metal or even stone - granite is a popular substance used for counter tops. Stainless steel is also good, but try to avoid aluminum if possible, because that is very soft and easily cut and scratched, and the metal oxidizes to a dull finish.
Include a ventilation hood overhead to eliminate smoke, steam and cooking odors if your kitchen island is going to have a cooktop. The range hood should extend beyond the cooking area by 3 inches or more on the sides for proper ventilation. Using the correct fan size will ensure that removal happens as intended. Have a fan capacity of about 50 cubic feet per minute (cfm) for each square foot of cooktop area.
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