House Extension In Chelmsford: What Is Permissible Without A Full Planning Application?

By Author: Nathan Brown
Total Articles: 2
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Planning permission for a house extension can be time-consuming. From checking permitted development rights to seeking pre-application advice and preparing the application to consultation and finally waiting for the decision, a lot has to be dealt with. Homeowners are often curious about whether one can skip the meticulous process when building an extension.
Thanks to permitted development, it’s possible as long as one abides by the rules! Therefore, all need to explore and understand them before embarking on a project to avoid getting into trouble with the law. Let’s start with the primary conditions to be fulfilled, followed by looking into the rules for each type of house extension in Chelmsford.
General Conditions Outlining an Extension Without Planning Permission
Here are the three primary conditions a house owner must fulfil when undertaking a house extension project in the absence of concrete planning permission:

1. No record of home extension in the past
Houses extended since the 1st of July 1948 cannot be worked on to increase living spaces. They will definitely demand planning ...
... permission.
2. Listed houses or those in conservation areas
The type of properties, as given above, is best extended under the guidance of experts.
3. Only houses come under permitted development
Neither flats nor maisonettes are eligible for extension without permitted development. Only houses that have not been converted in the past can be freely developed.
Rules For Different House Extension Types in Chelmsford Without Planning Permission

According to the General Permitted Development Orders of 1995, here are the changes to residential properties allowed and not allowed without planning permission:

For majority extensions:
• Forward and side extensions are only possible on a property away from the highway
• The extension does not solicit roof alterations to the existing house or the inclusion of chimneys, verandas, etc
• The materials for extension should match those used in the house’s exterior
• The house extension should be less than half of the land surrounding the property
• The extension built should always be smaller than the tallest part of the house
For single-storey extensions:
• The extended part of a detached house must never exceed the rear wall by 4 m. For every other residence, it’s 3 m
• The height of the extension must never exceed 4 m
For two-storey extensions:
• The extended part’s roof pitch should match that of the original house
• Windows on the first floor of an extension must have an obscured glaze and be non-operable. The windows can only be opened when it’s at least 1.7 m from the floor.
For porch extensions:
• The height of the porch can be maximum 3 m
• The maximum area an external ground can be is 3 m2
• The closeness of the porch to the boundary can be at the most 2 m when there is a highway next to it
For side extension:
• You can build a side extension of one storey only and not more
• The maximum height permissible is 4 m
For rear extension:
• Rear extensions of single storeys can go as far as 4 m and 3 m for detached and other houses, respectively
• In the case of double storeys, rear extensions can expand as far as 3 m from the original residence on condition that it is 7 m away from the wall at the rear side
For basement extension:
• The basement is not part of a separate unit
• The usage of the basement extension stays unchanged
• The builder has not excavated the land to form a new basement
• The inclusion of a lightwell has not altered the external appearance
For loft conversions:
• Dormer windows of the converted loft must always be within the highest part of the existing roof
• The cubic content of the converted space is a maximum of 40 m3
• Dormer windows must be within the roof plane on the primary elevation and not extended forward any more

As long as one is under the guidance of an extension contractor in the UK, one can make informed decisions and enjoy a homeowner’s permitted development rights. Experts of house extensions in Chelmsford recommend approaching a trusted and reliable team of architects and planners.

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