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.
Integrated vs freestanding appliances
Integrated appliances (behind matching cabinet fronts) give a more seamless look but cost more and can be more expensive to replace later since they need to match the specific cabinet dimensions. Freestanding appliances are more flexible and often cheaper, at the cost of a less uniform appearance.
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.
How kitchen fitting quotes work
Describe the current layout and what's changing — an initial estimate can follow, but a firm price for anything beyond a straightforward like-for-like refit usually needs an in-person visit, since existing plumbing/electrical positions significantly affect cost once work starts.
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.
Common kitchen fitting jobs
Kitchen fitters handle everything from a single worktop or cupboard door replacement to a full gut-and-refit: removing old units, fitting new cabinetry, worktops, and coordinating the plumbing and electrical work a kitchen needs (sink, dishwasher, oven, extractor). Many fitters manage the whole job and bring in a plumber or electrician for specific parts.
Kitchen electrics need a registered electrician
A kitchen refit usually means new dedicated circuits for higher-draw appliances (oven, hob, dishwasher) rather than sharing a ring main, plus RCD protection near the sink — this is notifiable work under Part P. If your kitchen fitter isn't a registered electrician themselves, ask who handles this part and whether they're NICEIC or NAPIT registered.
Kitchen fitting in older properties
Older properties sometimes have uneven floors and walls, or original chimney breasts and alcoves that affect standard unit layouts — a fitter working on a period property will usually survey these carefully before quoting, since standard-width units don't always fit cleanly into non-standard spaces.