Erection of an extension to rear elevation

General Policy 2

GP2 permits development in accordance with Area Plan zoning if it respects site surroundings in siting, scale, form, design; does not adversely affect townscape character; and does not harm local residents' amenity. The officer assessed the rear single-storey extension's design, projection, height and openings against these tests, finding compliance due to minimised visual impact from parapet, no overbearing or unacceptable overlooking, and location at rear avoiding street scene harm.

Residential Design Guidance 3.2 Potential Visual Impact of an Extension upon the Existing House

Prefers pitched roofs over flat roofs when publicly visible, but allows exceptions for properties with flat/low pitched roofs. The existing house has pitched roof, so flat roof is against guidance, but parapet minimises impact, making design acceptable.

Type A: Uplands

Sets 3m max projection for semi-detached to avoid tunnelling effect on neighbour amenity (overbearing, outlook loss). 3.9m projection exceeds this, but existing 2m fence and 2.7m height ensure no tunnelling, overbearing or outlook harm.

Residential Design Guidance 5 (Architectural Details)

Requires extensions to match main dwelling style for coherent appearance, with similar window details and finishes. Assessed as similar style except flat roof, considered acceptable.

Residential Design Guidance 7 (Impact on Neighbouring Properties)

Considers neighbour impacts like loss of light/overshadowing, overbearing, overlooking/privacy loss. Single-storey height avoids overbearing/overshadowing; no south openings and separations/distances with walls mitigate overlooking.