Gas hobs need a Gas Safe engineer
Installing or moving a gas hob is gas work, same as a boiler, and legally needs a Gas Safe registered engineer, not just a kitchen fitter or general plumber. If you're switching from electric to gas (or vice versa) as part of a refit, this needs coordinating separately from the general fitting work.
KBSA and TrustMark, what they actually mean
The KBSA (Kitchen Bathroom Bedroom Specialists Association) is the main UK trade body for the sector, though membership is limited to a few hundred companies nationally, so not every kitchen fitter will hold it. TrustMark is a broader government-endorsed scheme covering many trades — worth asking which, if either, your fitter holds rather than assuming either is standard.
What a good kitchen quote should include
A proper quote should specify unit and worktop brand/spec (not just "units, worktop"), whether appliances are supplied or just fitted, whether electrical and plumbing work is covered directly or subcontracted, and what happens if hidden issues are found once old units are removed.
Understanding the labour vs materials split
Units, worktop and appliances are often the largest share of a kitchen's total cost, but fitting labour, old kitchen removal, and making good around new services add up too. A cheap quote is worth checking against the same unit/worktop spec as competing quotes, not just lower labour.
Three steps to hiring the right kitchen fitter
First, ask to see photos of similar completed jobs. Second, clarify exactly who handles the electrical and plumbing work. Third, get a written quote that separates units, worktop, appliances and labour, so you can see where the money's actually going.
How many quotes should you get?
Three is reasonable for most kitchen jobs. For a full refit, make sure each quote specifies the same unit range and worktop material, since kitchen quotes vary enormously based on spec assumptions that aren't always stated clearly upfront.
Aftercare after a kitchen refit
Keep electrical certification (for new circuits) and appliance warranties together with your kitchen paperwork. Check cabinet doors and hinges after a few months of use and re-adjust if needed — a normal part of settling in that most fitters will do free of charge shortly after completion.
Food waste disposal units, what to know
An under-sink food waste disposal unit needs its own electrical connection and specific plumbing configuration — not every kitchen sink setup can accommodate one without modification, so it's worth deciding early in the planning rather than as an afterthought once plumbing is first-fixed.