Every trades directory makes it look easy: hire a plumber here, an electrician there, a tiler off a recommendation, and pocket the main contractor's margin. Sometimes it even works. This is the honest account of what "being your own contractor" involves — from a firm whose entire business is doing that job professionally.
What the Job Actually Is
A bathroom refit is four-plus trades whose work interlocks in strict order, on one small room, where each depends on the last one's accuracy. The contractor's product isn't the trades — it's the coordination: knowing that first-fix electrics precede boarding, that the tray sets before the enclosure measures, that the floor needs 24 hours nobody scheduled. Self-managing means becoming that product: scheduler, quality controller, materials clerk and dispute resolver, for a few weeks, in your only bathroom.
The Sequence — and Why It Bites
Strip-out → first-fix plumbing and electrics → boarding and prep → walls and floor → second fix → sealing and certification (the full order is in how it works). The traps aren't the stages — they're the joints between them: the tiler who needs the tray in first, the sparky who can't certify until the fan's ducted, the vanity that can't hang because nobody told the joiner about the pattress. Professionals carry this map in their heads from hundreds of rooms. First-timers draw it by making the mistakes, at £250 a lesson.
What You Save and What You Spend
- Save: the contractor's coordination margin, genuinely — often several hundred pounds on labour if every trade shows and nothing slips
- Spend: retail materials (no trade pricing — the self-supply problem), your evenings and phone hours, and idle-day costs when the sequence breaks
- Risk: each trade guarantees only their slice; the joints between slices — where bathrooms actually fail — belong to you
The Gap Problem
Good trades are booked out; your job is one day of theirs. When the plumber finishes Tuesday and the tiler can't come until a week Thursday, the bathroom sits stripped for nine days — multiply by every joint in the sequence and self-managed refits routinely run four to six weeks. A contractor's team does 5–7 days because the same people flow stage to stage with no gaps: the compression is the service. If it's your only bathroom, the gap-weeks are the real price.
When Something Goes Wrong
The month-two leak, again. Plumber: "movement in the boarding." Joiner: "plumbing." Each is guaranteeing their trade, honestly — and the failure lives between trades, in territory nobody signed for. You become referee in a dispute where every party knows more than you. One-contractor jobs make that argument structurally impossible: whoever's name is on the quote owns the joint (ours in writing).
The Honest Scorecard
Self-manage if: you've run trades before, you have a second bathroom, your dates can flex, and you enjoy this — for you it's a hobby with a payout. Don't if: you're learning the sequence on your own house, on annual leave, in your only bathroom. And if you do self-manage: put the sequence in writing, book trades with slack between them, photograph everything at every stage, and read our quote guide — it works just as well for comparing individual trades.
Related reading: Supply & fit vs self-supply, Our 5–7 day process, How long fitting takes, Our fitting team.
Not sure which way to go in your own bathroom? Call 01236 801802 — a five-minute conversation usually settles it.