# Flat B, 35 Arvon Road, Islington (rear dormer)

- **Decision:** dismissed, 10 September 2026
- **Decided by:** Planning Inspector: David Troy
- **Authority:** Islington (London)
- **Appeal reference:** 6010980
- **Application reference:** P2026/0457/FUL
- **Procedure:** written-representations
- **Development:** Flat-roof dormer on rear outrigger roof and enlarged rear window
- **Site context:** inside-settlement
- **Green Belt:** no
- **Framework applied:** August 2026 NPPF
- **Determinative policies:** DP3
- **Development plan policies:** London Plan 2021 D3, D4, Islington Local Plan 2023 PLAN1, Islington Urban Design Guide 2017
- **Main issues:** character and appearance
- **Tags:** householder, design-refusal, parties-consulted-on-2026-framework, tier-2

## Summary
A flat-roofed dormer on a rear outrigger in an Islington terrace was dismissed for harm to the host building and the terrace (DL ¶9).

## What made the difference
Poor fit with the terrace's roofscape. The appellant's energy-efficiency and space benefits were modest (DL ¶13).

## Policy findings
- **DP3: fail.** dormer harms host building and terrace; modest benefits (space, energy efficiency) insufficient (DL 9, 13)

## Key facts
- Parties consulted on the 17 Aug 2026 Framework (DL 2)

## Sources
- https://appeal-planning-decision.service.gov.uk/comment-planning-appeal/appeals/6010980
- https://appeal-planning-decision.service.gov.uk/published-document/4c4c81d4-6b4d-4746-8818-1c1edfa74fd3

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Source: https://planningdistilled.org/research/england/nppf-navigator/decisions/PINS-6010980.html

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