Render and cladding on a house and the materials condition
Class A permits alterations to a house provided the materials are of a similar appearance to the existing exterior. On designated land the cladding right disappears, and external wall insulation raises thickness problems the Order never anticipated.
Re-rendering a house is usually permitted development, and the phrase that decides it is "materials of a similar appearance". Class A of Part 1 of Schedule 2 to the General Permitted Development Order 2015 permits the improvement or other alteration of a dwellinghouse, subject to a condition that the materials used in any exterior work must be of a similar appearance to those on the existing house. Render house permitted development questions almost always come down to whether the new finish reads like the old one from the street.
Two exceptions swallow a lot of cases. On designated land the cladding right disappears altogether. And external wall insulation adds thickness, which raises questions the Order never contemplated.
Where altering an exterior counts as development
Start with section 55 of the Town and Country Planning Act 1990. Works that affect only the interior, or that do not materially affect the external appearance of the building, are not development at all and need no permission.
Painting a rendered wall a different shade of the same colour family is generally not development. Painting a brick house white is a different matter, because it materially changes the external appearance, and councils do treat it as development requiring permission where permitted development rights have been removed.
Applying render or cladding to a previously bare brick or stone elevation is development. It changes the external appearance materially, and the question becomes whether Class A permits it.
So the sequence for any external finish question is: is it development, then is it permitted, then does a condition or direction take the right away.
The similar appearance condition
The condition attached to Class A requires the materials used in any exterior work to be of a similar appearance to those used in the construction of the exterior of the existing dwellinghouse. That is a comparison against the existing house, not against the street.
What that means in practice:
- Re-rendering a rendered house in a render of similar colour and texture satisfies the condition.
- Rendering over brick does not, because the resulting appearance is not similar to the existing brick exterior.
- Replacing a painted pebbledash finish with a smooth silicone render changes texture markedly and is arguable, which means a conversation with the council rather than an assumption.
- Timber cladding on a house with no timber anywhere on its exterior fails the test.
- Matching a rear extension's finish to the existing house satisfies the condition even where the neighbours are different.
The government's technical guidance on permitted development rights for householders is the document to read alongside the Order, because it works through examples of how the condition is applied.
An important limit: the condition is about appearance rather than about identical specification. A modern render system with a different composition but a similar colour and texture is capable of being of similar appearance, and insisting on a like for like material is a stricter test than the Order imposes.
Designated land removes the cladding right
Class A does not permit the cladding of any part of the exterior of a dwellinghouse with stone, artificial stone, pebble dash, render, timber, plastic or tiles where the house is on what the Order calls article 2(3) land. That covers conservation areas, National Parks, National Landscapes, the Broads and World Heritage Sites.
The list of materials is exhaustive, so read it carefully. It catches render and it catches tiles, which surprises owners planning to tile hang a gable in a conservation area.
Two consequences. Any such work on designated land needs planning permission, with the design judged against the character of the area, and a short Heritage Statement explaining how the finish relates to the prevailing materials does most of the persuading. And if the house is listed, listed building consent is needed for the works in addition to any permission, and covering historic fabric in an impermeable render is the kind of proposal conservation officers refuse.
An Article 4 direction can remove the right outside designated land too, so check the position for the address before ordering materials.
External wall insulation and the thickness question
External wall insulation is an alteration, and on an undesignated house with a render finish already it will often be permitted development provided the finish is of similar appearance. The complication is the 60 mm to 150 mm of insulation now sitting outside the original wall face.
Where that thickness causes problems:
- Beyond the boundary. Insulation applied to a flank wall on the boundary projects over the neighbour's land, which is trespass regardless of the planning position. This is the most common reason a scheme stops.
- Over the highway. A wall on the back edge of a footway cannot be thickened into the highway without the highway authority's consent.
- Eaves and verges. The detail at the eaves has to be resolved, and extending the roof to cover the insulation is itself an alteration to the roof, which is Class C rather than Class A.
- Window reveals. Deepened reveals change the elevation's character, and on a house in a terrace the change is visible against the neighbours.
- Previous extensions. Where earlier extensions have used up the Class A allowances, take care that the new work does not turn into an enlargement question.
The Party Wall etc. Act 1996 is separate from planning and applies to work to a party wall or close to a neighbour's structure, so a notice may be required even where planning permission is not. Our note on flues, vents and stoves on a house elevation covers the analogous problem of external fixings that project.
Conditions on materials in a permission
Where permission is granted, expect a condition. The three forms you will see, with the practical difference between them:
| Condition wording | What it requires | How to discharge it |
|---|---|---|
| Materials as shown on the approved drawings | Nothing further, provided you build what was drawn | No submission needed |
| Samples to be approved before the relevant work starts | A physical sample or sample panel on site | Photographs plus a site visit, or a panel left in place |
| Details of materials to be submitted and approved | A schedule with manufacturer, product, colour reference and finish | A short schedule with data sheets |
Sample panel conditions cause programme problems because they require the panel to be built and inspected before the main work proceeds. Build the panel early, in a position where it can be left, and invite the officer rather than waiting for a visit to be arranged.
Where the render colour matters to the council, give a British Standard or RAL reference rather than a trade name, because trade names change and the condition then becomes impossible to discharge years later.
Evidence of the existing finish
Councils and future buyers both ask what was there before, and the answer is worth recording before the scaffold goes up.
- Photographs of every elevation in daylight, plus close-ups of the existing render texture, brick bond or stone coursing.
- A note of the existing render specification where it is known, including whether it is lime or cement based.
- A sample of the existing finish kept in a bag, which sounds fussy until a conservation officer asks.
- The date the work was carried out, and any invoices identifying the product used.
On an older solid-walled house the lime or cement question is more than a heritage nicety, because an impermeable render on a solid wall traps moisture and causes damage that becomes a maintenance liability. Where the house is pre-1919 and solid walled, take advice on breathability before specifying.
A Design and Access Statement is not normally required for a householder application, but where the finish change is contentious a short statement with the photographs, the sample references and the reasoning is what turns a delegated refusal into a delegated approval. Our note on wrap-around extensions and the Class A limits covers how earlier works affect what remains permitted.
PlanScope can draft the supporting statements for an application of this kind in minutes. Reports should be reviewed before submission, and we do not guarantee planning approval.
This is general guidance, not legal advice. Check the position with your local planning authority or a qualified professional before relying on it. A Lawful Development Certificate is the only formal way to confirm that works are lawful.
Frequently asked questions
Can I render over brick without planning permission?
Usually not under Class A, because the condition requires materials of a similar appearance to those on the existing exterior, and render over brick changes the appearance. Re-rendering an already rendered house in a similar colour and texture normally is permitted. Where the house is on designated land the cladding right is removed entirely.
Does painting a house need permission?
Repainting in a similar shade is generally not development at all under section 55 of the Town and Country Planning Act 1990, because the external appearance is not materially affected. Painting a brick house white is different, and councils do treat that as development where permitted development rights have been withdrawn by direction.
Which materials are excluded on designated land?
Class A does not permit cladding with stone, artificial stone, pebble dash, render, timber, plastic or tiles on article 2(3) land, which includes conservation areas, National Parks, National Landscapes, the Broads and World Heritage Sites. The list is exhaustive, and it catches tile hanging as well as render.
Is external wall insulation permitted development?
Often yes on an undesignated house where the finish remains of similar appearance, but the added thickness creates separate problems. Insulation on a boundary wall projects onto neighbouring land, which is trespass whatever the planning position, and a wall on a footway edge cannot be thickened into the highway without consent.
How should a materials condition be discharged?
Match the submission to the wording. Where samples are required, build a panel early and leave it in place for inspection rather than waiting for a visit to be arranged. Where details are required, submit a schedule with product data sheets and a British Standard or RAL colour reference rather than a trade name.
Sources and further reading
This article is general guidance about the planning system in England and, where stated, the rest of the UK. It is not legal or professional advice. Check your local planning authority’s validation requirements and take professional advice for your specific site.