ask us a question on permitted development           Permitted Development England
How to build a home extension  without Planning Permission using your PD rights - Oct. 1st 2008



Home Page About Us FAQ Advertise on this site Disclaimer Privacy Contact Us Site Map

Appeal Decision 58 - Certificate of Lawful Development.

This appeal decision summary and assessment has been produced by Planning Jungle Limited.  For more information, please go to

December 2009 - Code a00058


Summary of Case (appeal dismissed): 


The property is a two-storey detached house. The application included a proposed two-storey rear extension, the ground floor of which would have had depth 4m, and the first floor of which would have had depth 3m. 


The first key issue was whether the proposed rear extension would be contrary to Class A, part A.1(f), which states that “Development is not permitted by Class A if … the enlarged part of the dwellinghouse would have more than one storey and … (i) extend beyond the rear wall of the original dwellinghouse by more than 3 metres”. 


The appellant argued that there is a “fall back” scenario, in that Class A, part A.1(f) would allow him to erect a two-storey extension with depth 3m, and then subsequently Class A, part A.1(e) would allow him to extend the ground floor of this extension by an additional metre to depth 4m.  


The Inspector disagreed, and stated that this “fall back” position is not relevant. He stated that the proposed development would be a “single operation”, and that Class A, part A.1(f) would restrict both storeys to a depth of 3m. 


Main Conclusions: 


·       Where it is proposed to erect a two-storey rear extension, Class A, part A.1(f) would restrict both storeys to a depth of 3m. It therefore is not possible on a detached property to erect (as a single operation) a two-storey rear extension that has a ground floor with depth 4m and a first floor with depth 3m.
[Note: This would appear to contradict at least one other appeal decision – for further information see the entry in the “Reference Section” on “A.1(f)”].
[Relevant to: A.1(f)].


Links to the “Appeal Decision Notice” and other associated documents (e.g. drawings, etc): 


·       Appeal Decision Notice: 

·       Existing Drawings: 

·       Proposed Drawings: 






Download documents and diagrams of useful

Permitted Development information

permitted development documents download

 Appeal Decisions