A proposed side and rear extension at 1 Ryecroft Road, Petts Wood, Orpington, has been refused planning permission by Bromley Council's Plans Sub-Committee No. 1.
The committee, meeting on Thursday, August 13, 2026, determined that the development, due to its scale, bulk, and massing, would create an incongruous addition to the host dwelling. This, they concluded, would unbalance the appearance of the semi-detached pair and be detrimental to the visual amenities of the surrounding area.
Reasons for Refusal
The primary reason for refusal centred on the design and its negative impact on the character and appearance of the area. The proposed extension was classified as having excessive scale, bulk, and massing due to its significant width, height, and overall depth. Specifically, the first-floor element would exceed half the width of the host dwelling. Despite amendments made to the current proposal, including a set-back from the front elevation and a reduced ridge line, the committee found that these changes were not significant enough to overcome the previous reasons for refusal. The cumulative massing and overall bulk were considered to be an overly bulky addition that failed to respect the scale of the existing dwelling and its attached pair, disrupting the symmetry of the semi-detached pair to an unacceptable degree. The proposed width was also noted to be wider than previously refused schemes.
Previous refusals and dismissals at appeal for similar extensions at 1 Ryecroft Road were primarily due to the proposed extension's height, scale, bulk, and massing, which were considered to be an incongruous addition to the host dwelling. These extensions were found to unbalance the appearance of the semi-detached pair and be harmful to the visual amenities of the surrounding area. Specific concerns raised by inspectors included the loss of the catslide roof feature, the extension extending across the full width of the property, and the overall bulk being a bulky and dominant addition that detracted from and visually competed with key features, degrading the dwelling's positive contribution and harming the character and appearance of the semi-detached pair and wider area.
In the context of the Petts Wood area, an 'incongruous addition' refers to a proposed extension that, due to its scale, bulk, and massing, does not fit harmoniously with the host dwelling and its semi-detached pair. Such additions unbalance the appearance of the properties and are considered harmful to the visual amenities of the surrounding area. This is particularly relevant in areas like Ryecroft Road, characterized by semi-detached dwellings with balanced appearances and specific features like catslide roofs, where extensions that disrupt symmetry and dominate the existing structure are deemed incongruous.
Policy Context
The decision aligns with previous refusals for similar extensions at the property. The officer's report highlighted that the proposed development would be contrary to Policies D3 and D4 of the London Plan (2021) and Policies 6 and 37 of the Bromley Local Plan (2019), as well as the Bromley Urban Design SPD 2023.
Other Considerations
The committee also considered the impact on neighbouring residential amenities, finding it acceptable, and noted no objections from the Highways department or the Environment Agency regarding flood risk. The meeting details can be found in the Decisions Thursday 13-Aug-2026 19.00 Plans Sub-Committee No. 1.pdf document.
