Rules for House Extensions in 2022

Published On: November 14, 20220 Comments on Rules for House Extensions in 2022Tags: Last Updated: January 29, 20246.9 min read

You must be aware of the house extension regulations for 2022 if you intend to build an extension. Don’t let this stop you from deciding to construct an extension, though. To build the perfect addition you’ve always wanted, you just need to be aware of the regulations that govern house extensions.

house extension

We’ll list the main considerations you should have while planning to build an extension.

2022 House Extension Regulations

When thinking about a home improvement project, it’s crucial to select a qualified architect who can help you navigate the house extension regulations of 2022 and give you advice on the best layout and exterior design for your home—not just to make more space, but also to implement cutting-edge designs that can actually make your daily life better. While there are a lot of house extension regulations to take into account in 2022, they are not too complicated, but they can be challenging to follow when paired with protected regions, historic sites, or other designated locations such metropolitan greenbelts. The A&ES Britain Extension Guide to House Extension Rules 2022 is pleased to welcome you.

What kind of property you own is one of the key factors in figuring out how far you can go. In terms of the effects any extension will have on your adjacent neighbors, terraced or semi-detached house extension restrictions differ significantly from those that apply to detached properties. Whether you want to use your authorized development rights to expand your home or seek for planning permission is a crucial consideration in the 2022 house extension regulations. If you are unfamiliar with the authorized development regulations in Northampton, it may be difficult to navigate these nationally established standards on what you can and cannot do without receiving planning permission from your local council. Our knowledgeable experts can assist you if you’re unsure of how far you can extend or if you require planning approval for a house extension in 2022.

Rules for Single-Storey Extension

  • With an extension or any other sort of development, you can only enclose half of the property that was surrounding the original house. In addition, a shed or outbuilding may be included.
  • The extension cannot be placed in front of a side elevation or one that faces a roadway. Therefore, you would need planning clearance if you wanted to develop your extension outward toward the main road.
  • With the obvious exception of a conservatory, the materials utilized must match the current aesthetic of the home.
  • Exterior cladding is not permitted on buildings located on “designated land,” as the term is termed.
  • A single-story rear extension cannot extend more than four meters past the existing property’s back wall.
  • The extension’s height is limited to four meters.

Rules for Two-Storey Extension

  • If your home has more than one story, you are only allowed to extend out three meters from the house’s back wall.
  • If you are within two meters of the boundary, the extension’s eaves cannot be higher than three meters.
  • The ridge and eaves cannot be raised over the height of the current property.
  • The distance between the extension and the back boundary must be at least seven meters.
  • The roof pitch must match the existing property or be as near to it as possible.
  • Any raised platforms, verandas, or balconies require planning approval.
  • Obscure-glazed windows that cannot be opened must be installed in the roof slope or side elevation wall.
  • A two-story extension is not subject to approved development rights on any designated land.
  • The extension’s façade must be constructed with materials that look comparable to those of the house.

Rules for side extension

  • A single-story side extension may not be taller than four meters or broader than half the existing property’s width.
  • On designated land, side extensions are not authorized.

Rules for rear extension

  • A single-story rear extension cannot extend more than four meters past the existing property’s back wall.
  • The maximum length of a single-story extension to the back is four meters.

building home extension

Extension Regulations for Terraced and Semi-Detached Homes 2022

Allowable Development/Previous Approval

  • You are allowed to add on to a terraced or semi-detached house by up to 3 meters under approved development without needing a permit!
  • You will need to apply for a lawful development certificate for this, which can be done either before or after construction. However, we advise applying before construction because it is always wise to confirm that the structure you are constructing falls into the appropriate category. If you plan to sell the property within four years after the project’s completion, you must do this.
  • To ensure the success of your project, it is always vital to engage an experienced architect. Permitted development projects must adhere to various regulations.

Full Planning Permission/Householder

  • You will need to apply for planning permission for your extension if your house is located in a conservation area or if you want to create a more distinctive addition using materials different from the ones used for the original extension.
  • However, as a general rule of thumb, you should not violate the 45-degree rule, which is a line drawn at a 45-degree angle from your neighbor’s closest habitable space, such as a kitchen, living room, or bedroom, so as to not obstruct their outlook and access to light. Terraced and semi-detached house extension regulations under a householder application vary from council to council.

2022 Detached House Extension Regulations

Allowable Development/Previous Approval

  • You can add up to 4 meters to a detached property under allowed development, and up to 8 meters under the larger home extension scheme or prior consent.
  • To make sure your proposal complies with all of the house extension regulations for 2022, it is always a good idea to speak with an expert architect. As was already said, there are many other considerations that need to be taken into account.

Full Planning Permission/Householder

  • As was already said, you must request planning approval from your local planning authority if you live in a conservation area or other designated area, if your building is listed by Heritage England, or if you want to build a more unusual extension.
  • House extension regulations for detached homes in 2022 are much more lax, especially if your property is on a sizable plot with plenty of space between it and its neighbors’ homes.
  • However, it’s always a good idea to consult a skilled architect. So that your project doesn’t exceed the suggested restrictions for detached house extensions, they will know where to seek for the council’s regulations.

How much development is allowed in Northampton without a permit under the permitted development rules for 2022?

The term “permitted development allowances” applies to these. They are exclusive to homes. Maisonettes, other structures, and flats are not included. A local planning authority should be consulted to see whether the approved development rights will apply to your extension. This is to ensure that there are no additional limits to take into consideration. Depending on the kind of home you own and how far you want to extend, you may be able to do so until 2022 without needing planning approval. Changes to permitted development came into effect in 2020 as a result of the pandemic’s persistence and the necessity for more space among many households to conduct their everyday activities. By offering contractors and service providers work during a difficult time otherwise, this would also help Northampton’s economy.

The larger house extension plan—otherwise known as “prior approval”—was put into effect by the revisions. This is a 28-day application to find out how far you can extend without planning approval based on your neighbor’s lack of opposition. For example, you can add up to 6 meters to a terraced or semi-detached home instead of the original 3 meters, and you can add up to 8 meters to a detached home instead of the original 4 meters.

With this in mind, you must exercise caution because a variety of criteria, including height, ground level, elevated platforms, the original, as-built property footprint, and the location of the boundary wall, can cause your extension to be considered PD. Speak with one of our experts right now if you’re uncertain or need assistance determining how far you can expand without a permission in 2022.



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