Plastering Cost Calculator London

Calculating plastering costs doesn't need to be complicated. The most common method plasterers use is pricing per square metre (m2). To work out the cost yourself, you need to know the surface area of the walls or ceilings being plastered and the rate per square metre for the type of work required.

Start by measuring the length and height of each wall in metres. Multiply length by height to get the wall area in square metres. For a standard rectangular room, the total wall area is 2 × (length + width) × wall height. If you're also plastering the ceiling, multiply the room length by the room width and add that to the wall area. Once you have the total area, multiply it by the per-metre rate for your chosen work type.

For example, a typical 4m × 3m bedroom with 2.4m ceiling height has wall area of approximately 33.6m2 and ceiling area of 12m2, giving a total of 45.6m2. At a skim rate of £12/m2, the estimated cost would be around £547. At the higher end of £15/m2, the same room would cost approximately £684. This gives you a reliable budget range before requesting formal quotes.

It's worth noting that plasterers may charge a minimum call-out fee for small jobs. Patch repairs under 2m2 are often quoted as a fixed price (typically £80–£200) rather than per square metre. Very large jobs (whole house re-skims) may benefit from a discounted per-metre rate due to the volume of work.

Several variables influence the final cost of a plastering job beyond the basic per-square-metre rate. Understanding these factors helps you budget accurately and identify where savings are possible.

Condition of existing walls: If walls are in good condition with minimal cracks or damage, skimming is straightforward and cost-effective. Walls with extensive cracks, loose plaster, or water damage require additional preparation, which increases labour time and cost. Stripping old blown plaster before re-skimming adds approximately £5–£10 per square metre.

Room access and size: Small rooms with tight access take longer per square metre because setting up and moving equipment is less efficient. High ceilings over 3 metres require scaffolding or podium steps, adding £100–£300 to the total. Rooms with many windows, doors, or alcoves require more cutting-in work, which is labour-intensive.

Type of finish: A standard smooth skim is the most affordable finish. Skimming over textured artex requires additional coats and costs 50–70% more. Specialist finishes like Venetian plaster, polished plaster, or lime plastering are significantly more expensive due to the specialist skills and multiple coats required.

Materials: Standard gypsum plaster (Thistle Multi-Finish, Bonding Coat) is the most cost-effective. Moisture-resistant board for bathrooms and kitchens costs more. Insulated plasterboard for external walls adds £5–£10 per square metre but provides long-term energy savings. Always confirm whether your quote includes materials or is labour-only.

Location within London: Plastering rates in central London (Zones 1–2) tend to be 10–20% higher than outer London boroughs due to higher overheads, parking charges, and congestion zone costs. Suburban areas in Zones 4–6 may offer slightly lower rates.

Volume of work: Whole-house re-skims benefit from economies of scale. Plasterers often offer a reduced per-metre rate for large jobs because the setup-to-work ratio is more efficient. If you're planning multiple rooms, having them done together costs less per room than doing them individually over time.

While per-square-metre pricing is standard for larger jobs, some plasterers charge by the day, especially for small repairs or complex work where measuring area is impractical. Understanding day rates helps you compare quotes and budget for smaller projects.

The average plasterer day rate in London is £180–£300 per day, with most skilled plasterers charging around £200–£250. Labour-only plasterers (where you supply materials) may charge £150–£200 per day. For specialised work like lime plastering or Venetian polished plaster, day rates can reach £350–£500 due to the specialist expertise required.

Day rates typically cover an 8-hour working day. Most plasterers will quote per job rather than per day for larger projects, as per-job pricing is more transparent for both parties. For a full house re-skim, a two-person team can complete a 3-bedroom house in 4–6 days at a total cost of £3,000–£5,000, which works out more cost-effective than a day-rate arrangement.

When comparing quotes, ask whether the rate is per day or per job, whether materials are included, and whether there's a minimum charge. Some plasterers charge a half-day minimum (£100–£150) for small call-outs, which is worth knowing if you only need a small patch repair.