I am building a single storey rear extension on a detached property. I know there is a height allowance of 4 meters but my query concerns an atrium window I'm putting in the flat roof of the extension and whether the height of this atrium has to be included in the 4 metre allowance or not?
PD and atrium window in flat roof
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No part of the development can be over the limit.
What are you defining as an atrium window?
If there may be a problem with the extension and roof, then it may be possible to build the extension under PD first, and then alter the roof under PD afterwards. But it depends what this atrium is
If there may be a problem with the extension and roof, then it may be possible to build the extension under PD first, and then alter the roof under PD afterwards. But it depends what this atrium is
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You have probably already been here: http://www.planningportal.gov.uk/permission/commonprojects/extensions/
Height is measured from the highest existing ground level around the existing dwelling wherever it is to be extended.
You may also find this document useful: http://www.planningportal.gov.uk/uploads/100806_PDforhouseholders_TechnicalGuidance.pdf
Height definition is on page 6
Height is measured from the highest existing ground level around the existing dwelling wherever it is to be extended.
You may also find this document useful: http://www.planningportal.gov.uk/uploads/100806_PDforhouseholders_TechnicalGuidance.pdf
Height definition is on page 6
Freddie
I've looked at the docs you suggested and am thinking that as our eaves on the extension are no higher than the existing eaves and the atria take the extension height to under 4 m then we should be okay. I'm basing this on page 16 of the communities and local gov doc. Am I right or still confused!?
I've looked at the docs you suggested and am thinking that as our eaves on the extension are no higher than the existing eaves and the atria take the extension height to under 4 m then we should be okay. I'm basing this on page 16 of the communities and local gov doc. Am I right or still confused!?
Provided it is lower than 4m and the eaves are no higher than the existing it would comply although the eaves must not exceed 3m high if within 2m of a boundary.
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