External render and facade repair in London in 2026 ranges from around £250 for a small crack or patch repair to £8,500 or more for a full re-render of a three-storey terrace elevation, including scaffolding. A single-storey rear extension elevation typically costs £2,500 to £4,500 to fully re-render, while a full Victorian terrace front elevation runs considerably higher once scaffold, substrate preparation and render system are factored in. This guide breaks down realistic 2026 cost bands by render type and job size, and the breathability question that matters most on London's solid-wall period stock.
Crack and patch repair vs full re-render cost
Render repair splits into two very different jobs, and confusing them is the most common way a repair budget goes wrong. A crack or patch repair deals with localised failure, a hairline crack, a section blown loose near a downpipe, or damage around a bracket, without touching sound render elsewhere on the wall. A full re-render strips the existing coat back to brick or block across a whole elevation and applies a new system throughout, and typically only makes sense where failure is widespread rather than isolated.
As a general guide, a straightforward patch or crack repair on a section of wall reachable from a tower or ladder typically costs £250 to £600. Full re-rendering of a single-storey rear extension elevation, where scaffold access is more modest, typically runs £2,500 to £4,500 including materials, labour and access. A full three-storey Victorian terrace front elevation, requiring full-height scaffold and, usually, more extensive substrate preparation, typically runs £5,500 to £8,500 or more.
London render and facade repair cost guide (2026)
Item
Typical range
Notes
Crack or patch repair (localised area)
£250–£600
Full re-render, single-storey extension elevation
£2,500–£4,500
Includes scaffold, prep and render system
Full re-render, 3-storey terrace front elevation
£5,500–£8,500+
Full-height scaffold, more extensive prep
Sand and cement render (supply and apply)
£45–£65/sqm
K Rend / silicone render (supply and apply)
£55–£85/sqm
Monocouche render (supply and apply)
£50–£75/sqm
Lime render (solid-wall specification)
£75–£110/sqm
More coats and skilled labour than cement
Figures are general London market guidance only, not a fixed Lian Construction quote. Access, substrate condition and render system all affect the final price.
Render types compared: sand and cement, K Rend, monocouche and lime
Traditional sand and cement render is the most affordable system per square metre, applied in two or three coats and usually finished with a texture before painting. It's well understood and relatively cheap in material terms, but it's rigid, needs repainting roughly every decade, and is prone to cracking if the mix or application thickness is wrong for the background.
K Rend and other silicone renders cost more per square metre than sand and cement, since they're factory-mixed, polymer-modified systems applied over a mesh-reinforced base coat, but they're more flexible, more crack-resistant, and carry colour through the render itself rather than relying on paint, so the higher upfront cost avoids a repaint cycle over the render's lifespan. Monocouche render sits in a similar price bracket to K Rend, applied in a single coat over a mesh base, and is popular on newer builds and extensions for speed, though it needs the right weather window and a skilled hand to avoid a patchy finish. Lime render, the traditional and generally correct specification for solid-wall Victorian and Edwardian properties, costs the most per square metre of the four, reflecting the extra coats, longer curing time and more specialist labour it needs, but it's the appropriate choice where breathability matters more than upfront cost.
Scaffolding as a cost factor
Scaffolding is needed for almost any render work above ground floor level, and it's often a larger line item than most people expect relative to the render itself, particularly on a modest repair. A single-storey rear extension typically needs scaffold costing £700 to £1,200, in place for the duration of application and initial curing. A full three-storey terrace elevation typically needs scaffold costing £1,800 to £3,500 or more, reflecting both the height and the longer period it needs to stay up to allow proper curing between coats.
Scaffold cost doesn't scale purely with wall area either. Access constraints common on London streets, no space for a scaffold tower on a narrow pavement, shared party wall access with a neighbouring property, or the need for a licence to erect scaffold on a public highway, can all add cost and lead time before render work even starts. This is one of the main reasons a small patch repair on an upper floor can carry a cost disproportionate to the size of the repair itself, since the scaffold to reach it costs the same regardless of how much render actually needs replacing once it's up.
Scaffold licensing itself takes time to arrange where it needs to stand on a public pavement or road, since the local council typically needs several weeks' notice to issue a licence, and this lead time is worth building into a render programme from the outset rather than treating scaffold as something that can go up the moment a quote is accepted. Where a neighbouring property needs to grant access for scaffold to be erected on their side of a boundary, agreeing this early avoids a render job stalling part-way through preparation while access is sorted out.
Victorian solid walls: lime render vs cement render cost and suitability
A large proportion of London's render repair work traces back to the same underlying issue on Victorian and Edwardian solid-wall properties: a hard cement render trapping moisture against a wall that was built to breathe. Cement render is less permeable than the brick behind it, and once moisture gets in through a crack or a poorly detailed reveal, it can't easily evaporate back out through the render, so it tracks sideways or gets pushed further into the wall instead.
Lime render costs more upfront, typically £75 to £110 per square metre against £45 to £65 for sand and cement, because it needs more coats, longer curing time between them, and more experienced labour to apply correctly. But on a genuinely solid-wall property, particularly one with a history of damp, the higher upfront cost is usually the better long-term value, since replacing a cement render with another cement render often means repeating the same repair, and the same cost, again within a decade. Where re-rendering follows a damp problem, the wall also needs time to dry out before the new render goes on, which affects programme rather than direct cost, but skipping that drying period undermines even a correctly specified lime render.
What pushes render and facade repair cost up or down
Cost drivers that increase the budget
Substrate condition is the biggest variable: removing decades-old cement render that's still well bonded in places takes far longer than applying render to a clean, sound background, and a wall with mismatched historic patch repairs sometimes needs more preparation than one that's never been touched. Detailing around window and door reveals, string courses and downpipe brackets adds labour time, since these areas need cutting in carefully rather than rendering in one flat pass. Restricted access, narrow streets, shared party walls or scaffold licensing on a public highway, adds both cost and lead time.
Ways to keep render costs under control
A proper survey that distinguishes patch-repairable damage from damage needing full re-rendering avoids paying for a full re-render where targeted repair and a clean and repaint would do the job. Timing render work to coincide with other exterior work needing scaffold, such as brickwork repointing, spreads the fixed cost of access across two trades instead of paying for scaffold twice. Choosing a render system suited to the wall, rather than defaulting to the cheapest option regardless of substrate, also avoids paying for the same repair again within a few years.
Timeline and planning considerations for render work
A single-storey rear extension elevation typically takes a few days to a week to render once scaffold is up. A full three-storey terrace elevation, including stripping old render, repairing the substrate and applying a new system in the correct number of coats with proper curing time, more typically runs two to three weeks, and render needs a settled weather window to cure properly, so a realistic programme includes a weather allowance rather than a best-case figure.
In many conservation areas, changing render colour or texture on a street-facing elevation, or painting previously unpainted render, can require planning permission even where the same change would be permitted development outside a conservation area, and listed buildings almost always need listed building consent for render changes regardless of how minor they look. Our rendering and facade team flags at survey stage where a property's location is likely to bring render work into planning scope, though confirming the position and making any application is handled separately by the property owner or a planning consultant.
Questions
Frequently asked questions
How much does render repair cost in London?
A localised crack or patch repair typically costs £250 to £600. A full re-render of a single-storey extension elevation typically runs £2,500 to £4,500, while a full three-storey Victorian terrace front elevation typically costs £5,500 to £8,500 or more, largely driven by scaffold and substrate preparation.
Which render type is cheapest?
Sand and cement render is the cheapest per square metre, typically £45 to £65, followed by monocouche and K Rend or silicone systems at £50 to £85 per square metre. Lime render, the correct specification for solid-wall period properties, costs the most, typically £75 to £110 per square metre, reflecting the extra coats and skilled labour it needs.
Why does scaffolding cost so much relative to a small render repair?
Scaffold cost is largely fixed by height and access rather than by how much render actually needs repairing, so a small patch repair on an upper floor can carry scaffold costs disproportionate to the repair itself. A single-storey extension typically needs £700 to £1,200 of scaffold, while a full three-storey terrace elevation typically needs £1,800 to £3,500 or more.
Should I use lime render or cement render on my Victorian house?
For a genuinely solid-wall Victorian or Edwardian property, lime render is usually the correct choice, since it lets moisture evaporate through the wall rather than trapping it as a hard cement render does. It costs more upfront, but avoids the cycle of damp and render failure that a cement render often causes on solid-wall stock over time.
Can I repair a small area of render without redoing the whole wall?
Yes, where the surrounding render is sound. A patch repair can be cut back to a clean edge and blended in, though a perfect colour match isn't always achievable on a weathered elevation without repainting the whole face. Where cracking or hollow-sounding render is widespread rather than isolated, full re-rendering is usually the better long-term option.
Do I need planning permission to re-render my house?
Outside a conservation area, re-rendering with a similar finish is often permitted development. Inside a conservation area, changing render colour or texture can require planning permission, and listed buildings almost always need listed building consent. We flag this at survey stage, though confirming the position is handled separately by the property owner or a planning consultant.
How long does a full re-render take?
A single-storey extension elevation typically takes a few days to a week once scaffold is up. A full three-storey terrace elevation, including stripping old render and proper curing time between coats, typically takes two to three weeks, with a weather allowance built in since render needs a settled window to cure properly.
Can render and brickwork repair be done together?
Yes, and it's often more cost-effective to do so, since scaffold and access only need arranging once for both trades. Where render is stripped back to brick, the exposed brickwork sometimes needs repair or repointing before new render goes on, particularly on a wall that's been damp for a while.
Can Lian Construction give me a fixed quote for render work?
Yes. We survey the elevation and substrate first and provide a written quote broken down by scaffold, preparation, render system and detailing, so the figures in this guide can be replaced with a price specific to your property before work begins.
Does the weather affect render cost as well as programme?
Yes, indirectly. Render needs a settled weather window to apply and cure properly, and where a job is delayed by rain or frost, scaffold sometimes needs to stay up longer than originally quoted, which can add to hire cost on a longer job. We build a realistic weather allowance into render programmes for this reason, rather than pricing to a best-case number of working days that poor weather then extends.
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