How much does plastering cost per m² in the UK?

What actually drives the cost of a plastering job

Plastering prices turn on three things: the state of the existing wall, how much of it needs doing, and whether you’re paying a plasterer by the day or by the m². A skim coat on sound walls is one job. A full replaster with lath repair, damp patches, and a ceiling is another. Most homeowners get caught out not on the plastering itself but on the prep: scraping old wallpaper, sorting bonding on bare brick, or realising a Victorian ceiling needs overboarding before anything else goes on. This page covers what’s in a fair quote and what isn’t.

Skim coat vs full replaster: when you need which

A skim coat is a thin finishing layer (around 2 to 3mm) applied over existing plaster that’s still structurally sound. It flattens minor bumps, covers old wallpaper residue, and gives you a clean surface for paint. Budget £15 to £25 per m². A full replaster means stripping back to brick or plasterboard, applying a bonding or browning coat, then skimming. That’s £25 to £40 per m² and takes significantly longer to dry. If you can push on your existing plaster and hear a hollow thud, or see spiderweb cracks spreading from the corners, the plaster has blown and a skim won’t save it. Replaster. If the walls feel solid and the issues are cosmetic, skim.

Ceiling plastering: labour-intensive and why it costs more per m²

Ceilings are typically 15 to 25% more per m² than walls. It’s physical: plastering above your head is harder, slower, and requires scaffolding or stilts. Old lath-and-plaster ceilings (common in pre-1950s homes) often need overboarding with plasterboard first, which adds £10 to £20 per m² in materials and a half-day of labour. If a ceiling is sagging or cracking along the joist lines, don’t skim it. Overboard or pull it down and start again. Skimming a failing ceiling buys you months, not years.

Preparing walls: scrape, PVA, lath repair

Prep is where cheap quotes come unstuck. Old wallpaper has to come off fully (any residue telegraphs through the skim). Bare plaster needs a PVA mist to control suction so the fresh plaster doesn’t dry too fast and crack. Bare brick needs a bonding coat before skim, not just PVA. Damp patches need diagnosing before anything else happens, otherwise you’re skimming over a problem that will reappear in six months. A quote that doesn’t itemise prep is a quote that might get revised mid-job.

Drying times and project scheduling

Fresh plaster is pink when wet and pale salmon when dry. A skim coat usually needs 2 to 5 days before a mist coat (watered-down emulsion) can go on. A full replaster can need a week or more, and thicker backing coats on damp-affected walls can take two. Rushing the paint stage is one of the most common ways to ruin a plastering job: trapped moisture causes the emulsion to peel and the plaster to stay dark in patches. Factor drying into your project schedule, especially if decorators are booked in.

DIY skim vs hiring a plasterer

Plastering is the trade most DIYers underestimate. A bad skim shows clearly under paint (trowel marks, hollows, rounded edges where walls meet ceilings) and fixing it usually costs more than hiring a plasterer in the first place, because they have to reskim over the top. If you want to try it, start with a cupboard or a small patch, not a feature wall. For a whole room, hire a plasterer. The finish matters and the window to get it right is short.