‘A dual-pitched roof’ means one dual-pitched roof, not two dual-pitched roofs

A householder in Buckinghamshire failed to convince an inspector that a curtilage swimming pool building would be permitted development, the inspector ruling that ‘a dual-pitched roof’ excludes buildings with two dual-pitched roofs (DCS Number 400-010-392).

The proposed building would have a central ridge with a dual-pitched roof, a projecting gable with a dual-pitched roof set below the ridge line of the main roof, and a lean-to on one flank. This arrangement would result in five different roof pitches. The appellant suggested that the term dual-pitched was used by legislators in the GPDO to differentiate between commonly found roof types and that it was not intended to restrict particular design styles.

The inspector acknowledged that the Technical Guidance states that ‘the height limit on a dual-pitched roof should also be applied to buildings that have hipped roofs (slopes on all four sides)’. He ruled, however, that the term ‘dual-pitched roof’ is very specific, and was not persuaded that the intention of the GPDO was to permit alternative roof forms with multiple pitches of the kind proposed. He concluded that the building would not have a dual-pitched roof. As a consequence, the maximum permitted height of the structure would be 3 metres. The building would be above that limit and, accordingly, would not constitute permitted development under the terms of the GPDO.  The council’s failure to grant a LDC in respect of the proposed detached swimming pool building was well-founded, he determined.

The following DCP chapter is relevant: 4.3421

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