Why does the same UK rendering job cost £6,000 and £15,000?
Two rendering quotes at the same price can be two different products with two different lifespans, and two quotes at very different prices can be the same job sized to different render systems. Per-m² bands by system, the scaffolding line that often hides, and the Part L trigger above 25% of any wall.
£6,000 to render a 3-bed semi in sand and cement is a traditional finish that needs painting and is the most likely to crack. £6,000 in silicone or acrylic thin-coat is a flexible, crack-resistant finish that lasts longer. Same headline, two different products with different lifespans.
This guide is a checklist to read a rendering quote line by line. For the price bands by render type, start with the rendering cost guide. For the general method, see how to compare builder quotes.
Typical price, so you have a benchmark#
In 2026, rendering a typical UK 3-bed semi is £5,000 to £7,500 in sand and cement, £7,000 to £10,500 in monocouche, and £9,000 to £15,000+ in silicone or acrylic thin-coat. Per m² supplied and applied: sand and cement £30 to £50, monocouche £45 to £65, silicone or acrylic £50 to £70+. All figures are before scaffolding.
Outside these bands, the system or the removal of failed render is usually the explanation. Both should be on the quote as named lines.
The render-system trap#
A "cheap" quote and a "dear" quote on the same house are usually two different systems with two different lifespans:
- Sand and cement (£30 to £50 per m²): traditional, cheapest, needs painting, most likely to crack. Lifespan around 15 to 25 years with regular repainting.
- Monocouche (£45 to £65 per m²): single through-coloured application, no painting needed, consistent finish. Lifespan around 25 to 30 years.
- Silicone or acrylic thin-coat (£50 to £70+ per m²): flexible, crack-resistant, often self-cleaning. Lifespan 25+ years with minimal maintenance.
A quote that does not name the system is impossible to compare. "Render the house" is not a spec.
What a fair rendering quote should itemise#
A reasonable rendering quote breaks the price into at least these lines, with a number against each:
- Render system, named: sand and cement, monocouche, silicone, or acrylic. Brand if relevant (K-Rend, Weber, Sto, Parex).
- Per-m² rate and total area in square metres.
- Substrate preparation: cleaning, repairs to cracked brick, damp proofing or DPC checks.
- Beads and stops: angles, drips, expansion joints.
- Removal of existing render if it is failing, with a separate price.
- Scaffolding: hire period, height, and weekly cost.
- Painting: only on a sand-and-cement finish (monocouche and silicone are pre-coloured).
- Building Regs and insulation upgrade if more than 25% of any wall is being re-rendered.
- Waste disposal: skip hire and removal of broken render.
- Workmanship guarantee on the application (typically 10 years).
A flat "render the house, £8,000" with no system, area, or scaffolding line is the version to push back on. See how to read a builder's quote for the general format you should expect.
What is typically excluded#
Items that often quietly fall outside the headline price:
- Repairs to the substrate found once the old surface comes off (cracked brick, blown render behind soundboard, damp issues).
- Window and door reveal repairs where the new render meets the frame.
- Painting where a sand-and-cement system is specified.
- Gutters, downpipes, and rainwater goods removed and refitted to render behind them.
- Insulation upgrade triggered by Building Regs on a major re-render (external wall insulation can add £4,000 to £8,000 to a whole-house job).
- Making good to internal plaster where moisture has tracked through a failed wall before the re-render.
For the broader pattern across trades, see hidden costs in builder quotes.
Red flags specific to rendering#
- No render system named. "Render the house" is not a spec.
- No scaffolding line. Whole-house rendering needs access. Its absence means it has been hidden or excluded.
- Rendering over failing render. Applying new render over blown or damp substrate traps the problem. A fair quote inspects and prices removal.
- No Building Regs mention on a full re-render. Usually notifiable above the 25% threshold, and often an opportunity (or requirement) to upgrade insulation.
- A "guaranteed lifetime" finish with no brand named. Most genuine guarantees attach to the system manufacturer (K-Rend, Weber, Sto). No brand means no real guarantee.
- Deposit above 25%. Materials-light job; the contractor does not need a large advance.
- No mention of substrate repairs. If the existing wall has any history of cracking or damp, removal will expose issues that need pricing.
For the general red-flag pattern, see signs of a rogue builder.
Before you sign#
- Is the render system named (sand and cement, monocouche, silicone, acrylic)?
- Is the per-m² rate and total area on the page?
- Is scaffolding included or itemised separately?
- Is removal of failing render priced, if needed?
- Is substrate preparation and repair scoped?
- Is Building Regs and insulation addressed if more than 25% of any wall is being re-rendered?
- Is the workmanship guarantee on the page?
- Is the total in the typical band for the system and house size?
If three or more of these are unclear, the quote is not ready to be compared against another. Get the missing items in writing before you decide.
The shortcut#
Running this comparison by hand means knowing per-m² rates by system, scaffolding norms, and the Part L threshold. Check the Quote does that part for you: paste or upload your rendering quote and we check every line against current UK rates, flag any system mismatches, and tell you what is missing. Your first check is free.
Got a quote you want checked?
Paste any UK contractor quote and Check the Quote compares every line item against current market rates, flags missing scope, and runs a Companies House check on the contractor. Free on your first project.
Frequently asked questions
- What should it cost to render a house in the UK in 2026?
- A typical 3-bed semi is £5,000 to £10,500 before scaffolding (MyJobQuote, 2026). Per m², sand and cement is £30 to £50, monocouche £45 to £65, silicone or acrylic thin-coat £50 to £70+. Scaffolding is a separate cost, often several hundred pounds or more by the week. See the rendering cost guide for the per-tier bands.
- Why are two rendering quotes for the "same" house so different?
- Usually because they specify different render systems. £6,000 in sand and cement and £6,000 in silicone are two different products with different lifespans, not the same job at the same price. Sand and cement needs painting and cracks over time. Silicone is flexible, crack-resistant, often self-cleaning, and lasts longer. The system has to be named on the quote.
- Is scaffolding really not included?
- Often not. Whole-house rendering is working-at-height by definition, so scaffolding is essential and is a significant separate cost. A quote that does not mention access has either absorbed it invisibly or excluded it. Ask for it as a separate line so you can compare quotes on like-for-like terms.
- Does old render need to be removed first?
- Sometimes, and it is a major cost driver. Sound existing render can sometimes be over-coated after preparation. Blown, cracked, or failing render has to be hacked off and disposed of first, adding labour and skip costs. A quote that assumes the old render stays when it actually needs removing will rise once work starts. A fair quote inspects and prices removal where needed.
- Do I need Building Regulations approval to re-render?
- Re-rendering more than 25% of an external wall is generally notifiable under Building Regulations Part L, because the work may need to improve the wall's thermal performance at the same time. A reputable renderer factors this into a whole-house job. A quote for a full re-render that is silent on Building Regs and any insulation upgrade has missed something.