Room size
Larger rooms naturally take more material and time to plaster than smaller ones, so square metreage is one of the first things factored into a quote. A small box room costs less to plaster than a large living room simply because there's less surface to cover.
Walls versus ceilings
Ceilings generally take longer to plaster than walls of the same size, since the work is overhead and often needs more careful protection of the floor and furniture below. A job covering both walls and ceiling will cost more than walls alone.
Skim versus full replaster
A skim coat over sound plaster is a quicker job than a full replaster, which involves stripping out old material and building up new coats from scratch. The skim or replaster guide explains how to tell which your wall needs, which has a direct effect on price.
Condition of the existing surface
A wall or ceiling in generally sound condition needs less preparation than one with damp damage, cracking or loose material, all of which add time before the plastering itself can start.
Artex
Skimming over an artex ceiling or wall usually needs extra preparation compared with a plain surface, which is factored into the price. See the skimming over artex page for more on what that involves.
Access and height
Rooms with high ceilings, tight staircases, or awkward access can take longer to set up for and work in, which affects the overall time and therefore the cost of a job.
Making good
Patching plaster around sockets, skirting, or areas disturbed by other trades is sometimes needed as part of a job, and this extra making good adds to the overall scope and cost.
Getting an accurate figure
Since so many factors affect the price, the most accurate figure comes from a visit or from photos of the room. Send photos or book a free quote and we'll give you a figure based on your specific job.
Room size and shape
A larger room naturally takes longer to plaster than a small one simply because there's more surface area to cover, but shape matters too. A room with lots of alcoves, chimney breasts, window reveals or odd angles takes more time per square metre than a simple rectangular room, because each corner and reveal has to be worked by hand rather than covered in long, continuous passes.
Access and working height
Rooms with high ceilings, stairwells, or awkward access such as a narrow hallway or a tight loft conversion generally take longer, since trestles and boards need to be set up carefully and moved more often. A straightforward ground-floor room with easy access and standard ceiling height is typically quicker to work through than a job needing scaffold towers or multiple platform moves.
Planning condition of the existing surface
A wall or ceiling that just needs a skim over a sound surface is a quicker job than one that needs hacking off and replastering from scratch. Where damp, structural movement or old lath-and-plaster is involved, there's more preparatory work before the new plaster coats can even go on, which affects the overall time and effort needed.
Making good around sockets, pipes and fittings
Jobs involving a lot of sockets, pipework, radiators or fitted furniture to work around generally take more care and time than a clear, empty room. If sockets or light fittings need to be removed and refitted by someone else as part of the job, that's worth factoring into timing when a visit or quote is arranged.
Number of coats and finish type
A straightforward skim in one or two coats is quicker than a full replaster built up over a floating coat and a separate setting coat, and this difference in the number of stages involved is one of the bigger factors behind how long a job takes overall, which in turn affects the cost.
Compare the proposed work, not just the total
Two quotes for the same room can describe different work. One may assume that the existing plaster is sound enough for a skim, while another includes removing failed material and rebuilding the background. Before comparing them, establish whether they cover the same surfaces and preparation. An apparently simpler job may only be suitable after the wall has been assessed.
Check whether the ceiling, window reveals and damaged corners are included. These smaller areas can need careful preparation even where the main wall is straightforward. Ask about anything you do not understand rather than assuming a short description covers every edge and repair.
Helpful information for a first enquiry
You do not need to calculate the cost yourself. Start with the rooms involved, photographs of the surfaces and your postcode. Mention whether the property is occupied, whether furniture can be moved and whether other building work is still underway. A ceiling with high access requirements should be described alongside its condition.
If the room is part of a wider renovation, share the planned order of work. Boarding, electrical alterations and damp repairs can change what is ready to plaster. A clear starting point helps the quotation reflect the job as it will actually be carried out. Send photos or book a free quote.
More about this topic
Why don't you list prices on the website?
Plastering costs depend on several factors specific to each job, such as room size, condition and whether it's a skim or full replaster, so a fixed price wouldn't be accurate. A quote based on your job gives a realistic figure.
Is a ceiling more expensive to plaster than a wall?
Generally yes, ceiling work tends to take longer than wall work of a similar size because it's overhead and needs careful protection underneath.
Does artex affect the cost of skimming?
Yes, skimming over artex usually needs some extra preparation compared with a plain surface, which is factored into the price.
What's the quickest way to get an accurate price?
Send photos of the room along with its approximate size, or book a free quote for a visit, and we'll give you a figure based on the actual job.
Does the condition of my wall affect the price much?
It can. A wall needing extra preparation, such as removing loose or damp-damaged material first, generally costs more than one that's already in sound condition.