Plasterer and Renderer London: Costs and What to Check

A plasterer and renderer in London typically charges about £800 a day, or £25 to £60 per square metre depending on the job. A small skim coat for one room runs £300 to £700. A full house replaster can run £2,500 to £8,000 or more depending on size and condition. Exterior render, including scaffolding, usually sits between £60 and £130 per square metre. Always get the quote broken down by labour, materials and scaffold, and ask how many coats the price includes. Every job is different, so please contact us for an exact quote.

• What a plasterer and renderer actually does
• What it costs in London
• Plastering vs rendering: which do you need
• How long does plaster and render take to dry
• What the job actually involves
• What to ask before you hire
• Areas we cover
• FAQ

What a plasterer and renderer actually does

A plasterer works inside the house: skimming new plasterboard, repairing cracked or blown walls, patching after electrical or plumbing work, and finishing ceilings. A renderer works on the outside: applying a weatherproof coat to brick or block walls, usually sand and cement, or a modern through colour system like monocouche or K Rend. Many tradespeople in London do both, but the skills and the risks are different. Interior plaster hides a scruffy wall. Exterior render is the only thing standing between your brickwork and the weather, so a bad render job shows up as cracking and damp within a year or two.

If you are patching a wall after a pipe repair or a new socket, this usually sits inside a wider job. Our plumbing services in London and electrician London pages cover the work that often creates the hole in the wall in the first place.

What it costs in London

Prices move with the size of the property, the floor (scaffolding adds cost above ground floor), and which part of London you are in. A render job in Chelsea or Kensington with period brickwork and access restrictions on a terraced street will cost more than the same square metreage in Dulwich or Barnes where there is room for a van and no permit needed.

These are London-wide ranges and they move. A terraced house in Islington or Highgate with good road access will usually price lower than a mews property in Belgravia or Knightsbridge where parking permits and narrow access add time. Confirm the final figure against the actual property before you commit, not a phone estimate.

Plastering vs rendering: which do you need

If the problem is inside, cracked ceiling, a wall that sounds hollow when you knock it, bubbling paint, you need a plasterer. If the problem is outside, crumbling or cracked external coating, damp patches appearing on an internal wall that backs onto an external wall, you probably need a renderer, and the internal damp will not go away until the external render is fixed first. This is the single most common sequencing mistake: redecorating inside before sorting out why the wall is damp from the outside.

Old lime plaster in a period property in Primrose Hill or Marylebone behaves differently to modern gypsum plaster. Lime needs to breathe, and sealing it with a modern skim or a vapour-tight paint traps moisture and causes it to fail again within a year or two. If your property is pre-1920s, say so when you get quotes, and ask specifically whether the plasterer has worked with lime before.

How long does plaster and render take to dry

Fresh plaster needs roughly a week before you can mist coat and paint it, and longer in cold or damp weather. As a rough guide, allow one week of drying per 5mm of plaster thickness before final decoration, though this varies with ventilation and the time of year. Painting too early traps moisture under the paint and you get bubbling or a patchy finish a few weeks later.

Render is slower. Each coat typically needs 24 to 48 hours before the next goes on, and a full sand and cement render needs several weeks, often four to six, to cure properly before a final coat or paint is applied. Rendering in frost or in direct hot sun both cause problems, cracking from fast drying, or failure to cure at all in freezing temperatures, so a reputable renderer will not push ahead regardless of the forecast. If a quote does not mention weather windows at all, ask about it.

What the job actually involves

Interior skim work: the existing surface is checked for loose or blown plaster, hollow areas are hacked off, PVA or a bonding agent is applied, and a two coat skim (base coat then finish coat) goes on, typically finished to a smooth trowel surface ready for mist coat.

Exterior render: the wall is checked for damp and movement first, loose render is stripped back to brick, a scratch coat goes on to key the surface, then a float coat, then the final coat, whether that is a traditional sand and cement finish or a modern through colour render. Scaffolding or a tower usually goes up for anything above ground floor, which is where a lot of the cost in Fulham, Battersea and Clapham terraces actually comes from, not the render itself.

If the wider job includes new skirting, architrave or finishing touches once the plaster is dry, our skirting board fitting in London page covers that separately, since it should always happen after plaster, never before.

The most expensive mistake: plastering or rendering over a damp problem instead of fixing the source. A plasterer can make a damp wall look perfect for a few weeks. If the leak, the bridged damp proof course, or the failed external render behind it is not fixed first, the new plaster blows again within months and you pay for the work twice. Before any plastering quote, ask the tradesperson directly whether they have identified the cause of the damage, not just priced to cover it.

What to ask before you hire a plasterer or renderer in London

• Is the price per square metre, per day, or a fixed job price, and does it include materials and waste removal?
• Does the quote include scaffolding or a tower, and who arranges it?
• How many coats are included, and what is the finish (smooth trowel, textured, through colour)?
• Have they worked on period or lime plaster properties if yours is one?
• What is the drying or curing time before you can paint or move furniture back?
• Do they carry public liability insurance, and can they show you recent local work?

For smaller patch jobs, a call out plasterer booked through a general handyman services in London listing is usually faster and cheaper than booking a specialist render firm, which makes sense for one room but not for a full house or an exterior wall.

Areas we cover

We arrange plastering and rendering work across Chelsea, Kensington, Wimbledon, Knightsbridge, Mayfair, Belgravia, Notting Hill, Holland Park, Fulham, Hampstead, Richmond, Marylebone, St John's Wood, Battersea, Clapham, Putney, Islington, Highgate, Primrose Hill, Barnes, Dulwich, Canary Wharf, Kew and South Kensington. Access and parking restrictions vary street by street in central areas like Belgravia and Mayfair, so factor that into your timeline if scaffolding needs a permit.

Check current day rates and call out charges on our handyman hourly rate in London page before booking, since plastering is often priced differently to general handyman work.

FAQ

How much does it cost to plaster a room in London?

Skimming one standard size room, walls and ceiling, typically costs £300 to £700 in London, depending on the condition of the existing plaster and whether any hacking off is needed first. Prices in central areas like Chelsea or Knightsbridge sit toward the upper end of that range because of access and parking. Prices are a guide only, so contact us for an exact quote.

How much does external rendering cost per square metre?

Sand and cement render usually costs £60 to £100 per square metre, and modern through colour systems like K Rend or monocouche run £80 to £130 per square metre. Scaffolding is normally quoted separately and can add £500 to £1,500 or more depending on the height of the wall. Prices are a guide only, so contact us for an exact quote.

How long does plaster need to dry before painting?

As a rough guide, allow around one week per 5mm of plaster thickness before painting, though this varies with ventilation, temperature and the time of year. Painting over plaster that has not fully dried traps moisture and causes bubbling or patchy paint later on.

Can you plaster over damp walls?

You can, but it is a mistake unless the source of the damp has been fixed first. Plaster will hide damage for a few weeks and then fail again, often blowing or bubbling, once moisture pushes through from behind. Always get the cause identified and resolved before any new plaster goes on.

Do I need a renderer or a plasterer?

A plasterer works on interior walls and ceilings. A renderer works on the exterior weatherproof coating on brick or block walls. If damp is appearing on an internal wall that backs onto an external wall, the render outside usually needs attention first, since replastering inside will not solve the underlying cause.

Is lime plaster different to standard plaster?

Yes. Lime plaster is common in period London properties and needs to breathe, so it should not be sealed with modern gypsum skim or vapour tight paint. Doing so traps moisture and causes the new finish to fail within a year or two. Confirm with your plasterer whether they have specific lime plaster experience if your property is pre-1920s.

How long does render take to cure before painting?

A full sand and cement render typically needs around four to six weeks to cure properly before a final coat or masonry paint goes on, though this varies with weather. Each individual coat during application usually needs 24 to 48 hours before the next one is applied, and work should pause in frost or extreme heat.

Is it cheaper to book a plasterer through a handyman service for small jobs?

For a single patch repair or a small crack, yes, booking through a general handyman call out is usually quicker and cheaper than a specialist render or plastering firm, which tends to have a higher minimum job size. For full room skims, a full house replaster, or exterior rendering, a dedicated plasterer or renderer is the better route.