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.
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.
Kitchen plumbing and appliance connections
A new sink, dishwasher or washing machine needs its own isolation valve and a proper waste connection — moving the sink position, in particular, often means new pipework rather than just reconnecting to the old point. Check whether your fitter handles this directly or brings in a plumber.
Kitchen regulations, FAQ
Do I need building control sign-off for a kitchen refit? Usually not for a like-for-like layout, but new electrical circuits need a registered electrician's certification, handled as part of that work. Can I fit my own units? Yes, unit fitting itself isn't regulated — it's the electrics and plumbing behind it that are.
Adding a kitchen island, what to consider
An island needs enough surrounding clearance to be usable (not just fit), and if it includes a sink or hob, plumbing and electrics need to reach it — often via the floor, which is far easier to plan during a full refit than retrofit into an existing floor later.
Kitchens as part of a wider extension
A kitchen fitted as part of a house extension needs closer coordination between the builder and kitchen fitter on timing — services (electrics, plumbing, ventilation ducting) need to be roughed in during the build phase, before the kitchen fitter's own first-fix stage begins.
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 affects the cost
Cost depends on worktop material (laminate vs stone vs wood), whether the layout is changing (moving plumbing/electrics vs replacing in place), unit quality, and appliance integration. Moving a sink or hob position adds cost beyond the units themselves because of the pipework and electrical work involved.