Rear extension refusal overturned on appeal in Havering.

Havering refused a rear extension over its impact on the neighbouring occupiers' light and outlook, and its conflict with the council's depth guidance. The Inspector allowed it anyway - once the actual design and orientation were properly weighed against the guidance's own exceptions.

The application

✓Site: a two-storey semi-detached house on Stewart Avenue, Upminster, with a long rear garden.
✓Proposal: a single storey rear extension - part flat roof with a rooflight, part pitched - plus an extension of the garage to the front.
✓Decision: refused by Havering, then allowed on appeal by the Planning Inspectorate, subject to conditions.

Why the council refused it

Havering's single refusal reason focused on the rear extension only - the garage extension to the front wasn't objected to at all. The council found that the rear extension's orientation, depth and closeness to the shared boundary would cause overshadowing, loss of light, and an overbearing impact on the neighbouring occupiers at the adjoining property, contrary to the council's Local Plan Policy 7 and its Residential Extensions and Alterations Supplementary Planning Document.

What the Inspector found

The Inspector agreed the extension's depth conflicted with the SPD's general guidance - but noted the SPD itself says the acceptable depth depends on site-specific factors like plot width, size and shape. Looking at the actual design, the section nearest the neighbour was a modest, flat-roofed element subordinate to the main pitched roof, limiting its bulk. It would be visible above the existing boundary treatment, but not overbearing.

The neighbour's rear bay window would see the extension only in oblique views, with the main outlook over their garden preserved - and the garden's width and depth meant a sense of openness remained despite some added enclosure. Assessing the sun's path and the properties' orientation, the Inspector found no significant loss of light either. Despite the SPD conflict, the proposal was found to comply with Policy 7 when the development plan was read as a whole.

Where the council's assessment fell short

A few gaps stand out when you compare the refusal reason to the Inspector's decision:

The SPD's own exception wasn't engaged with. The refusal treated the depth guideline as a hard limit, but the SPD explicitly allows for site-specific factors like plot width and shape to justify a greater depth. The council didn't explain why those factors didn't apply here.

"Overshadowing" and "overbearing" were asserted, not demonstrated. The refusal reason stated these impacts as conclusions. The Inspector's decision only reached the opposite result after actually assessing the roof form, the existing boundary treatment, the garden's proportions, and the sun's path - the kind of detailed look the refusal reason doesn't show any evidence of.

A guideline conflict was treated as equivalent to policy breach. Some conflict with the SPD's numeric depth guidance doesn't automatically mean a breach of the amenity-protecting Local Plan policy itself. The Inspector's decision turned on separating the two - conflict with the supplementary guidance didn't stop the scheme from complying with the underlying policy when assessed on its actual effects.

What this means for other appeals

✓Check whether a depth or size guideline has a built-in exception. Many SPDs allow site-specific factors like plot width or shape to justify exceeding a general rule - if yours does, make that case explicitly rather than leaving the numeric conflict unaddressed.
✓Back up outlook and light claims with real assessment. Existing boundary treatment, garden proportions, and the sun's actual path are the kind of detail that can turn a generic "overbearing" objection into a demonstrable non-issue.
✓Separate guideline conflict from policy breach. A scheme can conflict with a supplementary document's numeric rule of thumb and still comply with the core amenity policy it's meant to serve, once the actual effects are properly weighed.

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