The short answer
Not always. A low stack on a bungalow or single-storey roof can sometimes be repaired from a ladder or roof ladder, but most stacks on two-storey houses need a scaffold or tower so the platform is safe. National guides put chimney scaffolding at £400 to £900 (MyBuilder) or £660 per week (Checkatrade).
The access options, from simplest to most involved
A ladder against the wall reaches the eaves and sometimes the lowest stacks, but it gives no safe place to stand and work at the top of a stack. A roof ladder hooks over the ridge and lets a roofer reach a stack on a pitched roof, though only for light work. A mobile tower, which is a freestanding scaffold on wheels, suits a stack at a gable end or over a single-storey roof where there is a clear, level spot. A cherry picker, also called an access platform, reaches high stacks without erecting scaffold, but it needs firm, level ground and room to park.
A fixed scaffold is the most capable option. It gives a working platform around the stack, guard rails, and a safe route up and down. For anything beyond a minor job at height, it is usually the sensible answer, and for a rebuild or repointing it is hard to avoid. A roofer who tells you a job can be done from a ladder should explain how the work is made safe. Our chimney repairs hub shows which jobs tend to need what.
Some stacks can be reached from an adjoining flat roof or a rear extension, which saves a lot of scaffold, though the roof must be strong enough to stand on and guarded at the edge.
What decides which access you need
Height is the first factor. A stack above a three-storey terrace or a tall Victorian house sits well beyond ladder reach. The pitch of the roof comes next: a steep roof makes a roof ladder less comfortable, and a slippery or fragile covering may rule it out. What you are doing matters too. Replacing a pot or checking flaunching is a short task; repointing, replacing flashing or rebuilding several courses means hours of work with heavy materials, which calls for a proper platform.
Ground conditions play a part. A cherry picker or tower needs a firm, level base, so a sloping garden, soft lawn or narrow side access can rule them out. Parking restrictions may also apply, and a scaffold on a pavement may need a licence. Our guides to blocked chimneys and cracked chimneys show how often a first look from the ground leads to the next step up.
Shared stacks can mean reaching over a neighbour's roof, so access has to be agreed with them in advance.
Typical national scaffold prices
Figures below come from national cost guides. They are a guide to the scale of the cost, not a price for your house, and local rates differ.
| Item | Typical national range | Source |
|---|---|---|
| High-level chimney scaffold | £400 to £900 | MyBuilder, updated 21 August 2026 |
| Chimney scaffold, per week | £660 | Checkatrade, February 2026 |
| Standard two-storey house set-up | £850 to £1,200 | MyBuilder, updated 21 August 2026 |
| Scaffold licence | £50 to £200 | MyBuilder, updated 21 August 2026 |
Checkatrade's guide also gives a licence at around £140 per month. Checkatrade prices exclude VAT where stated. Ask whether the quote you receive includes scaffolding and VAT, because either can change the total considerably.
When the scaffold costs more than the repair
On small jobs, the scaffold can be the biggest part of the bill. Repointing a stack, for instance, might take a day or two, but the scaffold must stand for the whole job and be put up and taken down by another trade. MyBuilder's chimney repair guide gives repointing at around £750, in a range of £500 to £2,000, so a scaffold of several hundred pounds is a large share of that.
That is a reason to combine work. If the stack needs repointing and the flashing is tired, doing both while the scaffold stands is cheaper than two visits. Our page on chimney repair costs sets out the typical figures for each job, and how long a repair takes shows how scaffold time stretches. If the work follows storm damage, chimney insurance covers what to check before a scaffold goes up.
Hire is charged by the week, so a job that overruns because of rain costs more in scaffold time too. Ask what happens to the price if the weather delays the work.
Ask too whether the scaffold needs a board or fan to protect passers-by, as that can change the hire.
How access is decided on your house
At survey we look at the height, the roof, the ground and the neighbours, then work out how the job can be done without risk to anyone. A written quote follows, with the survey photographs. We keep the job as small as the fault allows, and access follows the same idea: if a ladder or tower is enough and safe, we use it rather than specify a full scaffold.
Tell us about anything that affects access: a narrow passage, a shared drive, overhead cables, a conservatory or flat roof below the stack, or a neighbour whose boundary the scaffold crosses. If the scaffold touches their land, they should be asked first. When the job finishes the scaffold is struck, the ground is left tidy, and a 10-year workmanship guarantee in writing covers the repair. It is not insurance-backed.
If you are planning other roof work in the same season, such as gutters or fascias, say so at survey. One scaffold can often serve both jobs, which is cheaper than putting it up twice.
A last point on safety: ladders left against a house overnight invite trouble, so any access we set up is taken down or secured each evening.