Planning appeal decision
Blyth Farm, Rock Cottage, Gypsy Lane, Hazel End, Hertfordshire, CM23 1HA
Planning appeal 3354712 at Blyth Farm, Rock Cottage, Gypsy Lane, Hazel End, Hertfordshire, CM23 1HA (East Hertfordshire District Council) was allowed on 17 July 2025 by Inspector Jarvis P, by written representations. The main issue, as the Inspector framed it: Whether the proposal would be inappropriate development in the Green Belt having regard to the National Planning Policy Framework and relevant development plan policies.
Replacement dwelling
- Authority
- East Hertfordshire District Council
- Appeal type
- minor · Planning Appeal
- Procedure
- Written Representations
- Development
- residential · Minor Dwellings
- Inspector
- Jarvis P
- Postcode
- CM23 1HA
Main issues, as the Inspector framed them
- Whether the proposal would be inappropriate development in the Green Belt having regard to the National Planning Policy Framework and relevant development plan policies
- Whether sufficient information has been provided with regard to the noise impact of the air source heat pump
- If inappropriate, whether the harm by reason of inappropriateness, and any other harm, is clearly outweighed by other considerations, such as to amount to the very special circumstances required to justify the proposal
What decided it
The proposal qualified as appropriate development under Framework paragraph 154(g) because, despite being materially larger, it would not cause substantial harm to Green Belt openness.
What the Inspector cited
- Development plan policies
- Policy GBR1Policy EQ2Policy DES4
- National Planning Policy Framework
- Paragraph 154(d)Paragraph 154(g)Paragraph 56Paragraph 57
- Judgments
- R. (On the Application of Heath and Hampstead Society) v Camden LBC [2008] EWCA Civ 193; Surrey Homes Ltd v Secretary of State for Environment CO/1273/2000; Northavon DC v Secretary of State for the Environment [1993] J.P.L. 761
How the Inspector dealt with each one is set out in the app, in order: the development plan, national policy, housing land supply, other considerations and the planning balance, beside the letter.
See how each was appliedThe decision letter
Town Planner Pro holds this letter. The Appeals plan opens it and every other letter we hold, all of them searchable, with the main issues and what decided each case picked out. We do not show letters on the free site because they carry people’s names and addresses.
With an account
What an account adds to this decision


More decisions in East Hertfordshire District Council
The authority’s record since 2016 · every decision in 2025
- Allowed28 October 20266008487The Ranch House, Amwell Hill, Great Amwell, Ware, SG12 9QZ
- Allowed14 October 2026601275023 Bishops Road, Tewin Wood, Tewin, AL6 0NP
- Dismissed28 September 20266006224Land Near Fanshawes Ware Park, Ware, SG12 0DX
- Dismissed25 September 20266006716Little Orchard, London Road, Spellbrook, Hertfordshire, CM23 4BA
- Allowed8 September 2026601070820 Bury Lane, Bramfield, SG14 2QL
The main issues, what decided it, the planning balance and the policies and judgments listed as cited are read from the published letter by Town Planner Pro and are our summary, not the Inspector’s words; the letter itself is the record. Contains public sector information licensed under the Open Government Licence v3.0. Research, not advice.
®