Kitchen renovations

• A rough plan, even hand drawnWhere the sink, stove, fridge and any island go
• Whether a wall is coming outA load-bearing wall means an engineer and a beam
• What you are supplying and what they areCabinets, counters and appliances are often owner-supplied
• The age of the house and what is behind the wallsOld wiring, cast iron drains, plaster

General guidance, not advice on your own situation. The person you hire decides what applies to it.