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Roof extension of rear dormer window and roof light to front elevation to facilitate loft extension.

Development Type

Roof extension/ loft conversion



21 Mayfield Gardens, London, NW4 2PY

Development Type

Roof Extension. Loft Extension. 


Proposed Development

Roof extension involving extension of the existing rear dormer window to create a rear/both sides wrap around dormer window and 1 no. roof light to front elevation, to facilitate a loft extension. 


4D Planning's role

4D Planning were commissioned to prepare the design and architectural drawings for a loft conversion with a wrap around large dormer to maximise the permitted development rights of the detached house. We advised the client on the guidelines and how to push achieve the largest possible extension to maximise the loft and habitable space. We liaised with Barnet Council's planners to ensure that the application would be approved. The planning application was granted planning permission/ lawful development certificate.

We also produced some 3D visualisations to enhance the project for the benefit of the client.



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