A sequence for choosing fittings, checking plumbing and avoiding last-minute bathroom changes.
Applies to: UK homeowners; gas and electrical work must use competent people where required.
Last checked: 16 October 2026
Key points
• Choose critical fitting dimensions and positions before boxing in or tiling.
• Check hidden pipework, ventilation, electrics and access for maintenance.
• Decide who coordinates every trade and when the room will be out of use.
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Why it matters
An attractive bathroom layout can fail in practice if doors hit fittings, wastes lack fall or concealed valves cannot be serviced. Resolve these details while access is still straightforward.
Checklist before you start
• Measure bath, shower, toilet and vanity positions with product drawings.
• Identify plumbing changes, electrical zones and ventilation requirements.
• Plan substrate repairs, waterproofing, first fix, tiling and second fix in order.
• Agree protection, skip access, deliveries and realistic curing and drying time.
What to do next
Keep a single written specification for fittings, finishes and responsibility. Record any change in cost or completion date before it is carried out.
Official sources
Use these official sources for the current detail that applies to your job, contract or location.
BuildPair provides general information and signposting, not legal, structural, electrical, gas or building-control approval. Requirements can change and the right answer depends on the work, contract, location and facts.
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