What are the Rules for house extensions in 2023 UK?

Spread the love

If you plan on building an extension this year, you should be aware of the house extension rules for 2023. Knowing the rules for building a house extension will allow you to build the extension of your dreams. Recent government legislation has made it easier to expand your living space with several changes to housing extension rules.

In this guide, we are going to summarise the key factors you need to think about when it comes to building an extension.

Do I Need Planning Permission for My Home?

As per regulations, If you live in a flat, maisonette, or building, you will require planning permission before any changes can be made. Similarly, some new developments, as well as older houses, are affected by this. There is a good chance you will have to obtain planning permission if your property is in a conservation area, although you should also consult your local authority first.

Creating new homes involves finding more carbon-efficient ways to heat them, improving their thermal efficiency, reducing overheating, and preparing for electric vehicle charging.


According to the Government Of the UK

“The Ministry of Housing, Communities and Local Government, now the Department for Levelling Up, Housing and Communities, publishes guidance called ‘Approved Documents’ on ways to meet building regulations.

These contain:

  1. General guidance on the performance expected of materials and building work to comply with the building regulations
  2. Practical examples and solutions to achieve compliance for some of the more common building situations.” 
See also  Make A Right Choice of Realtor Selling Your Home In Houston

Reference: https://www.gov.uk/government/collections/approved-documents

When considering a home improvement project, make sure you hire an experienced architect or renovation company in London that can walk you through the house extension rules of 2023. You can find great architects on websites like Houzz or someone with good reviews over the internet.

Here are a few key factors you should consider when building an extension.

House Extension Rules 2023

The house extension rules for 2023 are complicated, but they are straightforward. Nevertheless, they can pose a challenge when combined with conservation areas, heritage areas, or designated lands such as urban greenbelts.

You should consider what kind of house or property you own when determining how far you can extend. Terraced or semi-detached house extension rules typically differ from those of detached properties, and this generally has to do with how any extension will affect your neighbours.

If you intend to extend your home under permitted development rights, you should also consider the requirements for applying for planning permission. It can be tricky to navigate the permitted development rules in the UK if you are not familiar with the national guidelines on what you can and can only build with planning permission.

Back when I lived in East London, I looked for someone who could help me extend my house or get planning permission for your extension 2023. The house extension East London experts were of great help to me when I was looking for a house extension.  If you have no prior experience with house extensions, you should seek professional assistance.

See also  How To Get Student Housing in Innsbruck?

The following are some of the new rules that apply to house extensions.

Single-Story House Extensions Rules 2023

Previously, in the UK, single-story house extensions typically weren’t subject to planning permission.

When building a single-story extension, specific rules must be kept in mind. First, the extension must not cover more than half of the land surrounding the original house. This applies to any other type of build, such as sheds or outbuildings.

Additionally, the extension cannot be built in front of the side elevation or side elevation facing a highway, which would require planning permission. The materials used for the extension should match the property’s current look, except conservatories. Properties on designated land are not permitted to have exterior cladding.

The extension should also not extend beyond the back wall of the original property by more than four metres and should be at most four metres in height.

House Extension Two-Storey Extension Rules

When planning a two-storey extension, there are several guidelines to follow. Firstly, the extension should be at most three metres beyond the back wall of the house. Additionally, the maximum height of the extension’s eaves should be three metres if it is within two metres of a boundary.

The ridge and eaves height of the extension should not be taller than the existing property. The extension should be a minimum distance of seven metres from the rear boundaries. The roof pitch of the extension should match or closely resemble the existing property.

Additionally, planning permission is required for any raised platforms, verandas, or balconies. The upper-floor windows in the roof slope or side elevation should be obscure-glazed and unable to be opened. Permitted development rights do not cover properties on designated land for two-storey extensions. The extension’s exterior must use similar-looking materials to the original property.

See also  Home Inspection Checklist: A Comprehensive Guide to Buying a House

Rules For Side Extensions & Rear Extension 

Single-storey side extensions must not exceed four metres in height and must not be wider than half of the original property’s width. Additionally, side extensions are not allowed on designated land. As for rear extensions, they must not extend beyond the rear wall of the original property by more than four metres and must not be taller than four metres.


Depending on the type of property you own, you should consider extending your home. There are different rules and regulations for extending a terraced or semi-detached house than for a detached property, particularly when it comes to the impact on neighbouring properties. Another crucial consideration is whether you plan to apply for planning permission or utilise your permitted development rights.

In accordance with these guidelines, you need to receive consent from your local council in order to do anything that is not permitted. Having a solid understanding of these rules is crucial, as they are often complex and difficult to navigate.

However, it’s not just about following the rules; it’s about creating a functional and beautiful space that enhances your living experience. It’s essential to consult with a professional designer, architect, or planner to ensure that you get the most out of your extension that not only adheres to the regulations but also enhances the functionality, aesthetic, and value of your property.

A well-designed extension can provide a seamless transition between the existing and new space and increase your property’s overall value. 

Spread the love

jemmy ford