- Decision
- dismissed, 29 September 2026
- Decided by
- Planning Inspector: Edward Dade
- Authority
- South Norfolk (East of England)
- Appeal reference
- 6008791
- Application reference
- 2026/0257
- Procedure
- written representations
- Development
- Erection of one self-build dwelling
- Homes
- 1
- Site context
- settlement edge, listed building setting
- Green Belt
- No
- Framework applied
- August 2026 NPPF
- Determinative policies
- N6(1), S5(1)(j)
- Development plan policies
- Greater Norwich Local Plan 2024 Policies 2, 3, 7.5, South Norfolk DM Policies Document 2015 DM1.3, DM3.10, DM4.4
- Main issues
- habitats sites nutrient neutrality; suitable location
Summary
A single self-build house just outside Colney's development boundary near Norwich Research Park. Dismissed because nutrient-neutral mitigation (upgrading a septic tank to a package treatment plant) was not secured for the development's lifetime, so harm to The Broads SAC could not be ruled out. Under N6(1) the proposal "should be refused", which settled the S5(1)(j) balance despite substantial weight to one home.
Issues and findings
- Transition. "During the appeal, the parties were invited to comment on the implications of the new Framework for the proposal" (DL ¶2).
- Habitats: FAIL. "in the absence of an enforceable mechanism to secure the long-term maintenance and management of the proposed PTP, I cannot be certain that the development would be nutrient neutral over its lifetime" (DL ¶22). A self-build home "would not amount to an overriding public interest" (DL ¶23).
- Location (local plan). Good footways, lighting and frequent buses, but "other day-to-day facilities, such as food shops and primary education, are located beyond a convenient walking distance from the site" (DL ¶33). Only "a small positive contribution" to sustainable transport objectives (DL ¶37).
- Self-build unsecured. "specifying this development type in the development description and a supporting statement does not provide adequate certainty the dwelling would be constructed and maintained as a self-build dwelling" (DL ¶30).
Planning balance
S5(1)(j) cited with no five-year supply. "Therefore, Policy N6(1) indicates the proposal should be refused. Consequently, the scheme's benefits would be substantially outweighed by its adverse effects when assessed against the national decision-making policies in the Framework" (DL ¶44). Plan-led conclusion (DL ¶45).
What made the difference
The paperwork gate: no management agreement or enforceable mechanism for the treatment plant. With that secured, the case would have turned on S5(1)(j)(i) and the location evidence, where two earlier dismissals weighed against it.
Transferable points
- Nutrient mitigation by a package treatment plant must be secured for the lifetime of the development, including de-sludging and inspection; an unexplained condition is not enough (DL ¶12–14, ¶22).
- N6(1) failure makes the S5(1) benefits "substantially outweighed" (DL ¶44).
- Good footways, lighting and buses do not make a location sustainable if everyday shops and schools are beyond walking distance (DL ¶32–33).
- A self-build claim needs a planning obligation (DL ¶30).
Policy findings
Policy codes are those of the National Planning Policy Framework (August 2026) unless a development plan is named.
| Policy | Finding | Weight | Note |
|---|---|---|---|
| N6(1) | fail | Broads SAC/Ramsar nutrient neutrality; package treatment plant mitigation acceptable in principle but lifetime management not secured (no agreements, no draft condition); no IROPI; no EDP in force; N6(1) "indicates the proposal should be refused" (DL 11-14, 22-23, 44) | |
| Habitats Regs (GIRAMS) | pass | recreational disturbance mitigated by draft UU contribution (DL 15-21) | |
| S5(1)(j) | fail | no 5YHLS (figure not stated); (j) cited; benefits substantially outweighed because N6(1) directs refusal (DL 43-44); (j)(i) well-related limb not separately tested | |
| HO7 | benefit | substantial | one dwelling (DL 41) |
| LP GNLP 7.5 / DM1.3 (local) | conflict | self-build not secured by any obligation; limited non-car access; no overriding benefits (DL 29-30, 37) | |
| HE6 | neutral | setting of Grade II The Old Hall and The Old Rectory preserved (DL 38-40) |
Key facts
- Letter header dates the decision "29th December 2026" (queue date 29 Sep 2026)
- Site outside Colney development boundary, across Watton Road from it (DL 27)
- Watton Road B1108 40 mph with footways, street lighting, frequent buses and signal crossing to Norwich Research Park; but food shops and primary school beyond convenient walking distance (DL 32-33)
- Two previous appeals on the site dismissed (APP/L2630/W/20/3258218, APP/L2630/W/23/3318141) (DL 34-35)
- Self-build intention in description and statement only, no UU for self-build (DL 30)
- Parties invited to comment on the 2026 Framework; appellant did not respond (DL 2, 4)
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.