Window Replacement Scaffolding Cost

Window replacement scaffolding cost in 2026 runs from nothing at all on many jobs to about £1,900 for front and rear on a two storey house. All figures exclude VAT.

This is the job where the most money is wasted, because a great many window replacements do not need a scaffold at all, and a great many others need far less than gets quoted.

When you need a scaffold for window fitting

Situation	Access needed	Typical 2026 cost
Ground floor windows only	None, or a tower	£0 to £400
First floor, fitted from inside	None usually	£0
First floor, outward opening or fixed lights	One elevation	£650 to £1,100
Full house replacement, two storeys	Front and rear	£1,100 to £1,900
Bay window rebuild	One elevation plus bay support	£800 to £1,600
Three storey property	Front and rear	£1,700 to £2,700

Modern uPVC and aluminium windows on a two storey house are very often fitted entirely from inside, with the fitter removing the old frame, passing it in, and setting the new unit from within the room. Where that is possible, the scaffold cost is zero.

Ask the fitter first, and be specific

The question to ask is not “do I need scaffolding?” but “which of these windows can you fit from inside, and which need external access?”

Reasons external access genuinely gets required:

• Sealing and trimming the outside of the frame at first floor and above
• Heavy units that cannot be manoeuvred safely from inside
• Structural openings being altered, lintels replaced, or a bay rebuilt
• Render or brickwork making good around the new frames
• Conservation or timber sash work where the box frame is repaired in situ

If external access is needed for only two windows on one elevation, you need one elevation of scaffold, not a wrap.

Towers are often the right answer

Window work is the classic case for a mobile tower rather than a scaffold. A single window at first floor, firm level ground, a day or two of work: a tower at £200 to £400 does the job.

It stops being the right answer when the fitter is working along a full elevation and repositioning constantly, or when materials need to be loaded. Our comparison is in Scaffold Tower Hire vs Full Scaffolding.

Bay windows

Bays are the exception that pushes the price up. A bay projects from the elevation, so the scaffold has to be built around it or bridged over it, and the roof of the bay usually cannot take load.

Expect £150 to £500 above the plain elevation price for a scaffold that properly encloses a two storey bay. Where the bay roof is being replaced at the same time, the scaffold needs to reach above it with a working platform, which is closer to a bridging job. See Bridging Over a Conservatory for the same principle applied to a conservatory.

Combine the job

Window replacement is the easiest job to bundle. If the scaffold is going up anyway, do the gutters, fascias, soffits, external painting or repointing at the same time. You pay one mobilisation instead of two.

The saving is real: a second visit for gutters alone would cost £600 to £1,100 on its own, against a marginal cost of near zero if the trades overlap while the scaffold stands.

Getting the quote right

Window fitters and scaffolders often quote independently, which is how homeowners end up paying for a wrap when one elevation would do. Three steps that prevent it:

1. Get the fitter to mark up which openings need external access. In writing, per window, not per elevation.
2. Take that list to the scaffolder, rather than asking for a price to “scaffold the house”.
3. Ask whether a tower covers any of it. For one or two isolated openings it usually does.

Scenario	What most people are quoted	What is often needed
Whole house uPVC replacement	Full wrap, £1,500 to £2,600	Nothing, or one elevation
Two first floor windows, outward opening	One elevation, £650 to £1,100	Tower, £200 to £400
Bay rebuild plus first floor units	Full wrap	One elevation plus bay, £800 to £1,600

The same principle holds across property types, from a bungalow to a three storey townhouse.

What affects your price

The variables a scaffolder actually prices from, in order of impact:

1. Number of elevations. The largest single lever on any quote.
2. Frontage length and height. Together these set your face area in square metres.
3. Number of lifts. Each 2 metre lift adds boards, ties and labour. Above 9 metres the rate rises again.
4. Hire duration. Four to six weeks is normally included, then 5 to 10% of the quote per extra week.
5. Access difficulty. Narrow passages, soft ground, long carries and obstructions all add labour hours.
6. Region. Up to 40% between the cheapest and dearest parts of the UK.
7. Extras. Permits, netting, bridging, chimney lifts and temporary roofs.

Next steps

Head back to the estimator once you know your elevations and hire period. The itemised range it produces is what makes a quote easy to interrogate.