- Decision
- dismissed, 17 August 2026
- Decided by
- Planning Inspector: P Terceiro
- Authority
- Luton (East of England)
- Appeal reference
- 6005881
- Application reference
- 25/01027/FUL
- Procedure
- written representations
- Development
- Demolition of single-storey outbuilding and erection of terrace of 3 two-bed mews houses
- Homes
- 3
- Site context
- inside settlement, conservation area, listed building setting, PDL
- Green Belt
- No
- Housing land supply
- 3.36 years
- Framework applied
- December 2024 NPPF (transitional)
- Determinative policies
- HE6(4), S3
- Development plan policies
- Luton Local Plan 2011-2031 LLP1, LLP15, LLP25, LLP30, Luton Town Centre Design Guide SPD 2023
- Main issues
- conservation area; housing mix; living conditions
Summary
Three mews houses behind Cheapside in Luton's Plaiters Lea Conservation Area, replacing a flat-roofed outbuilding. Dismissed. The mix of pitched and flat roofs and the canted corner wall looked "awkward and contrived", causing less than substantial harm "at the lower end". Significant-weight benefits (three homes against a 3.36-year supply) did not outweigh the great weight given to the harm. The housing mix also conflicted with local policy. Although dated 17 August 2026, the letter applies the December 2024 Framework throughout.
Issues and findings
- Framework version. No preliminary note on the new Framework. The letter uses para 11(d) and the "great weight" and "less than substantial" vocabulary (DL ¶11, 31). Recorded as transitional.
- CA harm. "the proposed terrace with differing roof forms would appear awkward and contrived and result in a form of development that would harm the surrounding street scene and local character" (DL ¶8). Improving a poor site "does not necessarily follow" as successful integration (DL ¶9).
- Harm grading. "less than substantial in this case, and at the lower end of that spectrum" (DL ¶11).
- Balance. "These public benefits attract significant weight but fall short of overcoming the great weight I give to the harm" (DL ¶12).
- Tilted balance. "the application of the heritage related policies within the Framework provides a strong reason for refusing ... Paragraph 11 d) ii) ... is therefore not engaged" (DL ¶31).
Planning balance
Heritage balance under 2024 para 215 (now HE6(4)), then 11(d)(i) disapplication. Under the 2026 Framework the equivalent route would be S4 "substantially outweighed" with HE6(4). This letter predates that framing.
What made the difference
Roof-form design detail. The inspector accepted that the footprint, scale and density were fine in the tight grain (DL ¶10). A consistent pitched-roof terrace might well have succeeded, given the shortfall.
Transferable points
- Harm "at the lower end" of less than substantial still defeated significant-weight housing benefits against a 3.36-year supply (DL ¶11-12).
- Replacing an existing detractor does not in itself justify a design that fails to integrate (DL ¶9).
- A town-centre SPD's lower amenity-space guide can be given significant weight over a borough-wide garden standard (DL ¶20-21).
Policy findings
Policy codes are those of the National Planning Policy Framework (August 2026) unless a development plan is named.
| Policy | Finding | Weight | Note |
|---|---|---|---|
| HE6(4) | harm | great | decided under NPPF 2024 — "less than substantial ... at the lower end of that spectrum"; "great weight" to conservation; s72 cited; awkward mixed pitched/flat roofs and canted corner harm Plaiters Lea CA (DL 8-11) |
| HE6(4) | benefit | significant | 3 homes against 3.36-year supply, natural surveillance, economic, quick build-out, reuse of underused land: "significant weight but fall short of overcoming the great weight I give to the harm" (DL 12) |
| S3 | not-engaged | NPPF 2024 para 11(d)(i) — heritage policies give a "strong reason for refusing"; tilted balance "not engaged" (DL 31) | |
| HO5 | fail | housing mix — all 2-bed where evidence shows need for larger homes; LLP15 conflict (DL 14-17); code mapped by harvester | |
| P3 | pass | future and neighbouring living conditions acceptable; gardens below 45 sq m local standard but above 5 sq m town-centre SPD guide (DL 18-27); code mapped by harvester |
Key facts
- Council cannot show 5YHLS; 3.36 years not disputed (DL 12)
- Existing flat-roofed outbuilding said to detract from the CA (DL 7)
- Dated 17 August 2026 but applies the December 2024 Framework (para 11, "great weight", "less than substantial") with no reference to the new version
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.