Gypsum Plaster Cost Guide: UK Prices for 2026

Gypsum plaster is the standard choice for interior walls and ceilings in the vast majority of UK homes, from brand-new plasterboard partitions to the occasional skim in a period property.

This guide sets out what you should expect to pay in 2026, what pushes the price up or down, and how gypsum stacks up against lime plaster, cement render and ready-mixed alternatives.

How Much Does Gypsum Plaster Cost?

Wet gypsum plaster applied directly to masonry or blockwork costs around £20–£40 per square metre, materials and labour included. Skimming gypsum-based plasterboard costs more, typically £35–£60 per square metre, because boarding, fixings and scrim tape are part of the job as well as the finish coat.

Scaled up to a full room, most homeowners pay £300–£600 for a small room, £400–£800 for a medium room, and £600–£1,000 or more for a large or open-plan space.

Bigger rooms often work out cheaper per square metre, since a plasterer can cover more area in a single visit without the setup time being repeated.

Gypsum Plaster Prices

Here's a practical pricing table showing the most common gypsum plastering scenarios and related costs.

The average cost per square metre is £10-£15 for a gypsum plaster bag and £20-£60 for gypsum plaster applied, varying depending on whether it is wet plaster or plasterboard.

What Is Gypsum Plaster?

Gypsum plaster is made from calcium sulphate hemihydrate, a gypsum mineral that's been heated to drive off water, then ground down and blended with setting agents and fillers.

It sets within one to two hours, gives a smooth, paintable finish, and offers decent fire resistance, which is why it's the default choice for plasterboard and modern masonry construction alike.

British Gypsum is the best-known UK brand, with product lines including Thistle Multi Finish, Board Finish and Hardwall.

The main limitation is moisture: Gypsum plaster isn't designed for damp or exterior conditions, and applying it over an old, salt-contaminated lime substrate can cause adhesion problems later on. For anything persistently damp, lime plaster or a dedicated moisture-resistant system is the safer bet.

Supply-Only Prices: Buying the Materials Yourself

If you're plastering DIY, materials are a relatively small part of the overall cost compared with labour. A 25kg bag of finish plaster (like Thistle Multi Finish) costs £10–£15 and covers roughly 8–10m² at a standard 2–3mm skim thickness.

Undercoat products such as Hardwall or bonding coat cost a bit more — £15–£20 per 25kg bag — but cover far less area per bag, since they're applied thicker (around 11mm) on bare brick or block.

Standard 12.5mm plasterboard sheets run £6–£12 each for a 2.4m x 1.2m board, with moisture-resistant and fire-rated versions costing more. On top of that, budget for bonding agents or PVA (£8–£20 per product), scrim tape (£3–£7 a roll) and corner beads (£2–£5 each).

Labour Costs and Timescales

Plasterers typically charge a day rate of £180–£250, rising to £220–£300+ in London and the south east. Translated into project costs, labour alone tends to run £270–£475 for a small room (around 1–1.5 days' work), £270–£650 for a medium room (1.5–2 days), and £360–£850 for a large room (2–3 days).

Gypsum plaster dries in around 24 hours and is generally touch-dry within 3–7 days, though full curing can take up to two weeks; thicker coats take longer.

The reliable visual cue that it's ready for paint is an even, uniformly light colour across the whole surface; painting over patches that are still dark and damp is a common cause of peeling paint later on.

What Affects the Cost of Gypsum Plastering?

A handful of factors explain most of the variation in quotes:

• Room size and shape - Larger rooms are usually better value per m², but small, fiddly spaces with lots of corners take longer relative to their size.
• Wall condition - A skim over sound existing plaster, at roughly £15-£25 per m², is far cheaper than stripping back and replastering from scratch, which costs around £30-£40 per m², rising to £35-£55 per m² where there is extra preparation to do.
• Access and ceiling height - High ceilings and awkward layouts add time, which adds labour cost.
• Type of work - Skimming plasterboard is cheaper than a full wet-plaster job on bare masonry.
• Location - Labour rates can run 20%-40% higher in London and the South East than in northern England, Scotland or Wales.
• Job size and bundling - Plasterers often price multiple rooms more favourably than several separate one-room visits.

Gypsum Plaster vs Alternatives

While gypsum plaster is the most common type of plaster for UK homes, plaster alternatives do exist which are worth considering and comparing to.

Lime Plaster

Lime plaster, made from lime putty or hydraulic lime, sand and water, costs more per bag. It is usually around £16-£18 for 20kg-25kg, compared with £10-£15 for gypsum.

Labour is also considerably more expensive, as lime plaster needs multiple coats and weeks or months to cure properly. It also requires more specialist skill to apply.

Its advantage is breathability. In solid-walled period properties, lime lets moisture escape through the wall rather than trapping it, which can help prevent damp problems that gypsum may otherwise store up.

For a standard modern home with cavity walls or plasterboard, gypsum remains the more practical and affordable choice. For an older solid-wall property with a damp history, lime’s higher upfront cost can pay for itself over time.

Cement Render

Cement render costs around £10-£15 per 25kg bag, making it cheaper than gypsum.

However, it is mainly used externally or where a hard, impact-resistant surface is needed. It is rarely the right choice for a standard interior wall and lacks gypsum’s smooth, paint-ready finish.

Ready-Mixed Plaster

Ready-mixed plaster costs around £15-£20 per 10kg tub. This makes it more expensive per kilogram than gypsum or cement render.

However, its convenience makes it useful for small patch repairs or decorative finishes where speed matters more than covering a large area cheaply. It does not need mixing, offers consistent quality and can be applied quickly.

Types of Gypsum Plaster

Finish Coat or Skim

Finish coat, also known as skim, is a thin 2mm-3mm topcoat applied over existing plaster, fresh plasterboard or an undercoat to create a smooth, decorable surface. This is what most domestic replastering jobs actually involve.

It is generally used for interior walls and ceilings.

Bonding Coat

Bonding coat is an undercoat applied first on smooth or low-to-medium-suction backgrounds. It gives the topcoat something reliable to key onto, improving long-term durability.

Board Finish

Board finish is a finish coat formulated specifically for plasterboard and other low-suction surfaces. It is the product most commonly used when skimming new boards.

One-Coat Plaster

One-coat plaster combines undercoat and topcoat into a single product, applied in one pass. It is useful for smaller jobs or repairs where a full two-coat system is not practical.

Additional Costs to Budget for

• Stripping old plaster - £50-£150 for a small room, more if it needs to be fully removed and disposed of.
• Fitting new plasterboard before skimming - Roughly £500-£1,400, depending on the area covered.
• Surface preparation on damaged walls - Can add around £15 per m² to the job.
• Waste removal or skip hire - Around £20-£250, depending on the volume of rubble.
• Mist coat before decorating - Around £10-£40.

Always ask a plasterer to confirm exactly what is included, such as materials, preparation, protection of fixtures, clean-up and waste removal, before work starts. This helps avoid surprises on the final invoice.

What's Included in a Plasterer's Quote?

Usually Included

• Labour
• Gypsum plaster materials
• Basic surface preparation
• Basic clean-up after the job

Usually Not Included

Ask about these separately:

• Supplying and fixing plasterboard
• Wallpaper stripping
• Decorating or painting
• Major repairs to the wall structure itself

How to Keep Costs Down

• Prep the room yourself by stripping wallpaper, clearing furniture and applying PVA if the plasterer advises it.
• Bundle multiple rooms into one visit rather than booking separate call-outs.
• Get at least three quotes so you can compare like for like.
• Ask whether a skim over sound existing plaster would do the job, rather than a full replaster.

Checklist: Hiring a Plasterer

• Get multiple written quotes so you can compare price, experience and scope.
• Check reviews from previous customers where available.
• Confirm the plasterer has public liability insurance.
• Ask whether waste removal is included, or whether you will need to arrange it.
• Request an itemised breakdown before work begins, rather than just a single total.

FAQs