- Decision
- allowed, 21 September 2026
- Decided by
- Planning Inspector: Thomas Courtney
- Authority
- Rother (South East)
- Appeal reference
- 6009677
- Application reference
- RR/2025/2135/FULL
- Procedure
- written representations
- Development
- Appeal against condition 4 (electrochromic/smart glazing to rear rooflights) on permission for garage-to-holiday-let conversion in the High Weald National Landscape
- Site context
- open countryside, national landscape
- Green Belt
- No
- Framework applied
- August 2026 NPPF
- Determinative policies
- DM6, N4, P3
- Development plan policies
- Rother Core Strategy 2014 EN1, EN5, DaSA Local Plan 2019 DEN1, DEN2, DEN7, High Weald AONB Management Plan DS1, DS2
- Main issues
- necessity of dark-skies condition
Summary
The appeal was against a condition requiring electrochromic or smart glazing in the rear rooflights of a holiday let in the High Weald. It was allowed, but only by substituting a less prescriptive condition. The inspector held that controlling light spill was necessary under N4 and P3 of the 2026 Framework. Tying the condition to one glazing technology failed the DM6 tests.
Issues and findings
- Need for control. "Policy N4 of the Framework requires substantial weight to be afforded to conserving and enhancing the natural beauty of protected landscapes, whilst Policy P3 seeks to maintain the character of tranquil areas and limit adverse impacts from artificial light on intrinsically dark landscapes and nature" (DL ¶6). Rooflights facing unlit land "would erode the sense of darkness and tranquillity" (DL ¶7).
- Blinds not enough. "Given that the accommodation would operate as a holiday let, such measures would not provide a sufficiently reliable or enduring means of controlling light spill" (DL ¶11).
- Wording (DM6). "Condition 4 in its current form is overly prescriptive … Such a condition [allowing any permanent measure] would satisfy the requirements of Policy DM6" (DL ¶13-14).
Planning balance
No overall balance; this was a test of whether the condition was necessary and reasonable.
What made the difference
Rooflights set flush in the roof and facing an unlit orchard justified control. The council accepted that films and similar treatments could work, which made naming a single technology unreasonable.
Transferable points
- In a National Landscape, N4's substantial weight and P3's dark-landscape limb justify conditions controlling internal light spill from rooflights (DL ¶6-8).
- Occupier-dependent mitigation such as blinds is not reliable for holiday lets (DL ¶11).
- Conditions should specify the outcome, not one proprietary technology (DL ¶13-14).
Policy findings
Policy codes are those of the National Planning Policy Framework (August 2026) unless a development plan is named.
| Policy | Finding | Weight | Note |
|---|---|---|---|
| N4 | harm | substantial | substantial weight to conserving natural beauty; rooflight light spill against an unlit orchard would erode darkness and tranquillity (DL 6-7) |
| P3 | harm | P3 limits artificial light on intrinsically dark landscapes and nature; nocturnal species (DL 6, 8) | |
| DM6 | accord | a light-control condition is necessary, but specifying electrochromic/smart glass is over-prescriptive; replaced with a condition allowing any permanent light-reduction measure (DL 3, 13-14) |
Key facts
- Blinds and curtains rejected as unreliable in a holiday let (DL 11)
- [object Object]
- Parties consulted on the Aug 2026 Framework (DL 2)
Sources
This note is one of the decisions behind the NPPF 2026 Navigator, which shows how each Framework test has been applied across all the decisions in the database. Also available as Markdown.