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External rendering

Silicone Render Cost per m² and by House Size

Build a UK silicone-render budget from measured elevation area, substrate preparation, scaffold and a complete named system.

Direct answer

Current UK observations place professionally installed silicone render around £60–£100 per m² in MyBuilder's system comparison and £65–£80 per m² in Checkatrade's silicone-render guide. These headline rates may exclude failed-render removal, substrate repairs, scaffold, details, waste and VAT, so compare the complete written scope.

What changes the result?

A useful calculation starts with the physical scope and the written commercial terms. These are the factors to make explicit:

  • Net external wall area
  • Condition and removal of the existing finish
  • Named base coat, mesh, primer and top coat
  • Scaffold and access to every elevation
  • Reveals, beads, sills, pipes, waste and VAT

Use one scope for every quote

Give each business the same information and ask it to resolve the same boundaries. That makes the totals more comparable and exposes work left as an allowance or exclusion.

  1. Measure each elevation rather than using floor area
  2. Request the complete system build-up
  3. Separate scaffold, removal and repairs
  4. Confirm colour, texture, warranty and maintenance

Use two current cost observations

MyBuilder's August 2026 rendering guide places silicone systems at £60–£100 per m². Checkatrade's dedicated guide reports £65–£80 per m² including materials and labour, with about £72.50 per m² as its average. The overlap is a planning band, not a guaranteed local rate.

  • 100m² at £60–£100 per m²: £6,000–£10,000 before excluded work
  • 150m² at £60–£100 per m²: £9,000–£15,000 before excluded work
  • Checkatrade three-wall semi example: around £10,000

The background can cost more than the finish

A thin decorative top coat depends on a sound, compatible base. Loose render, hollow areas, cracks, damp, failed paint, unsuitable masonry or poor detailing can add removal, repair and drying work before the specified system begins.

Ask the contractor to identify the substrate assessment, areas to hack off, crack treatment, reinforcement mesh, beads, primer, base coat and exact top coat rather than quoting only a coloured finish.

Compare an all-elevation schedule

Record each elevation, openings, extensions, conservatories, parapets, reveals, sills, pipes and neighbour-access constraints. Require the scaffold, protection, waste, weather plan, VAT and making good to be either included or clearly excluded.

A low square-metre rate can describe a prepared wall while another quote includes scaffold and repairs. Normalize those boundaries before comparing totals or requesting matched quotes.

Questions people ask

How much does silicone render cost per square metre?

Current UK observations are roughly £60–£100 per m² at MyBuilder and £65–£80 per m² at Checkatrade. Check removal, repairs, scaffold, details, waste and VAT before treating a rate as all-in.

How much is silicone render for a semi-detached house?

Checkatrade reports around £10,000 for an average semi across three walls. The actual measured elevation area, background condition and scaffold determine whether a quote sits near that example.

Is scaffolding included in a silicone-render quote?

Not reliably. Ask for a separate scaffold line or an explicit statement that safe access to every included elevation is in the total.

Does silicone render need mesh and a base coat?

The required build-up depends on the named manufacturer system and substrate. Ask the installer to specify compatible preparation, base coat, reinforcement, primer and finish rather than mixing unverified components.

Method and sources

The model is a planning tool, not a quotation. These are the published sources used for this page; read the full assumptions before relying on a range. Source review: 16 September 2026.

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