Ask any experienced builder about their best jobs and they describe the same client: clear about what they want, quick to decide, easy to reach, pays on the nail. Ask about the nightmares and it’s drip-fed changes, vanishing decisions and late payments. The relationship is the project — and it’s the one part you control completely. This pillar maps how to run it.

Before anyone starts: the brief

A good brief is the cheapest project insurance there is. Before pricing, a builder should receive: drawings if you have them, a room-by-room scope in plain English, the finishes you’ve already chosen, and the things you haven’t decided flagged as provisional. Vague briefs produce vague quotes, and vague quotes produce extras. Our vetting guide covers choosing the builder; the briefing guide in this series covers what to hand them.

Get the commercial structure right at the same time — day rate versus fixed price suits different jobs, and the contract should record whichever you pick.

Site etiquette: the unwritten rules

None of this is contractual; all of it affects the speed, mood and goodwill of your job.

  • Tea and coffee — never obligatory, always remembered. A kettle, mugs and milk left available beats playing waiter five times a day.
  • Toilet access — agree it before day one, not when someone asks. On bigger jobs a hired welfare unit (~£25–£40/week) removes the issue entirely.
  • Parking — in London this is the single biggest daily friction. Sort permits or suspensions before start day; an hour circling for parking is an hour off your job, every day.
  • Access and keys — decide early whether the builder holds a key. Most do on longer jobs; if you’re not comfortable, be there reliably at 8am.
  • Kids and pets — a site is not childproof from day one. Keep both clear of work areas; tell the team about escape-artist cats before the front door spends a week open.
  • Radio, smoking, boots — say what you can live with once, at the start, pleasantly. Builders respect clear house rules and resent moving targets.

Communication that prevents disputes

Three habits do most of the work:

  1. One channel. Agree where decisions live — usually one WhatsApp thread or email chain. Decisions made verbally get confirmed there in a line: “As discussed — sockets moved to 6, not 4. £180 extra agreed.”
  2. A weekly ten minutes. A standing Friday walk-round: what happened, what’s next week, what decisions the builder needs from you and by when. Late client decisions are the number one cause of programme drift.
  3. A site diary. Two lines a day and photos of anything about to be covered up. If a dispute ever comes, this is gold; if it doesn’t, it’s the story of your build.

Money habits

Pay valuations promptly — nothing sours a job faster than chasing money, and slow payers go to the bottom of every subcontractor’s list. Pay against work done, in arrears, with a small retention; and pay properly, with invoices. Cash-in-hand discounts cost you your paper trail, your warranty position and sometimes your legal remedies — a bad trade for 10%.

When something’s wrong

Raise it early, in person first, specifically, and without an audience. “Can we look at the bathroom tiling together — the setting-out doesn’t look right to me” gets defects fixed; a week of silence followed by a list of grievances gets defensiveness. Almost every builder fixes almost everything raised this way, because the alternative — losing the balance and the review — is worse. If the professional route fails, escalate through the dispute process rather than by shouting: the paper trail you built above is exactly what wins there.

And if the relationship genuinely breaks down, end it formally — there’s a right way to part with a builder mid-project that protects your money and your programme, covered in this series.

In this series

Detailed guides in this cluster cover: briefing a builder and scopes of works, site etiquette in depth, communication systems, cash-in-hand risks, day rate versus fixed price, keeping neighbours onside, spotting cowboy builders, complaining professionally, and parting with a builder mid-project. They publish over the coming weeks and will be linked from this page as they go live.