Hire periods & overruns Cost Calculator

How this calculator works

Every figure in this calculator is the one published in the cost table on our hire periods & overruns guide. Pick the option that matches your job and the calculator returns that published range, adjusted for your region - it does not model anything the guide does not already say.

That is deliberate. A calculator whose rates drift from the page it sits under is worse than no calculator, because two numbers on the same site disagree.

What it cannot know: access, the condition of what is already there, and anything structural. Those are what separate three real quotes from each other.

Why the calendar costs more than the scaffold

The biggest number on a scaffolding invoice usually isn’t the metal. Most of the first payment covers the crew coming out to erect the structure and, later, to strike it and cart it away. That erect-and-dismantle labour is fixed whether the scaffold stands for a fortnight or four months, and it’s folded into a first hire period – commonly six to eight weeks – that’s already priced in.

So the weekly rate you pay after that first period is far smaller than the day-one figure. The trade-off is simple: a short job barely touches the weekly rate, while a job that drifts past the included weeks starts clocking up extension charges on top of a price you’ve already paid. Those extension weeks are where a tidy quote quietly grows.

Overruns rarely come from the scaffolder. They come from the trade using the scaffold – the roofer waiting on a dry spell, the renderer held up by a late delivery, the chimney repair that turns into a rebuild. The scaffold just stands there, on hire, while everyone else catches up. Weather does the same in winter, when a run of rain can push a re-roof well past its slot.

Ask up front what happens after the included weeks. Get the weekly extension figure in writing before the scaffold goes up, not after you’re over the line, and check whether the clock pauses if your main trade finishes early and asks for a strike. Some firms will hold an agreed rate for a fixed number of extra weeks if you raise it at quoting stage – almost none will once the invoice has gone out.

There’s a running duty behind the scenes too. A scaffold has to be checked before first use and then at regular intervals while it stays up, which the HSE’s guidance on scaffolding sets out. A good firm builds those inspections into the hire, so a long-standing scaffold carries a little more cost than the bare weekly rate suggests.

Line the trades up before you book. If the roofer can start the week the scaffold lands and the render follows straight on, you spend the included period doing actual work rather than paying to look at empty boards. The calculator prices the standing structure; the calendar is the part you control.