For most houses around Radlett, Borehamwood and St Albans, rendering the outside walls does not need planning permission. The exceptions catch people out, and they are more common in this part of Hertfordshire than many homeowners expect. Here is how to work out where you stand before the scaffolding goes up.
Rendering counts as an alteration to the outside of a house. Under the General Permitted Development Order, this is covered by Class A of Part 1, which lets you alter or improve a dwellinghouse without a planning application as long as the materials are of a similar appearance to the existing exterior. Applying render to a brick house has generally been accepted by councils as falling within this, because it is a common finish and does not change the size or use of the building.
So if you own a detached or semi-detached house on a normal residential street with no special designations, you can usually go ahead. The bigger question is whether your property has had its permitted development rights removed or restricted, which is where the real checks come in.
Some situations take your house outside the general rule. In these cases you will need either full planning permission or, for listed buildings, listed building consent, and the council will look closely at colour, texture and whether the finish suits the street.
Radlett falls within Hertsmere Borough Council, which has several conservation areas including parts of Watling Street, Aldenham and Shenley. St Albans and Harpenden have many more. If you are unsure, the council's online planning map will show you in a couple of minutes.
Planning and Building Regulations are two different systems, and homeowners regularly confuse them. Even where no planning permission is needed, Building Regulations can still apply. The trigger is usually thermal performance: if you are rendering more than 25 percent of a wall, or if you are adding external wall insulation under the render, the work is classed as renovating a thermal element and must meet current U-value targets.
In practice this means external wall insulation systems almost always require a Building Control application or an installer who is registered with a competent person scheme that can self-certify. A straightforward sand and cement or monocouche render over an existing solid or cavity wall, with no insulation added, usually does not need to be notified. Ask your renderer to confirm which category your job falls into and who is handling the paperwork.
Start with the planning constraints map on the Hertsmere, St Albans or Watford council website, depending on which side of the boundary you are on. It shows conservation areas, listed buildings and Article 4 areas as coloured overlays. Then check the original planning permission for your house if it was built after about 1990, as permitted development is often restricted by condition on newer estates.
If anything is unclear, a Lawful Development Certificate gives you written confirmation that the work is permitted. It costs around 129 pounds for a householder application and typically takes up to eight weeks. That is cheap insurance against a neighbour complaint or a problem when you come to sell, because solicitors do ask about exterior alterations.
For a standard house with no designations, there is nothing to wait for and the job is limited only by weather and scaffolding availability. Where a Lawful Development Certificate is sensible, build in eight weeks. Where full planning permission is needed, allow eight to twelve weeks from a validated application, plus time to prepare drawings and a short design statement. Listed building consent can take longer and may need a heritage statement.
It is worth getting this settled before booking a render date. Once render is on, removing it from historic brick is expensive and often damages the face of the bricks, so enforcement action on a listed or protected building can be a real cost rather than a slap on the wrist.
Usually yes without a planning application, but check for an Article 4 direction first and look at whether the council's conservation area appraisal mentions brick frontages as a key feature. If in doubt, a Lawful Development Certificate settles it in writing.
Repainting or re-rendering in a similar colour does not need planning permission on a normal house. A strong change, such as white to dark grey, is still generally permitted development but can attract complaints in conservation areas, so it is worth a quick check with the council.
Yes in almost all cases, because it counts as renovating a thermal element. Either the installer self-certifies through a competent person scheme or a Building Control application is made before work starts.
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