Town Planner Pro
Free trial
Search appeal decisions

Planning appeal decision

Dismissed14 July 20266002300

Hamilton House, Larch Avenue, Ascot, SL5 0AP

Planning appeal 6002300 at Hamilton House, Larch Avenue, Ascot, SL5 0AP (Royal Borough of Windsor and Maidenhead) was dismissed on 14 July 2026 by Inspector V Simpson, by written representations. The main issue, as the Inspector framed it: the effect of the development on climate change.

the Conversion and extension of the existing building to form 4 flats

Authority
Royal Borough of Windsor and Maidenhead
Appeal type
minor · Planning
Procedure
Written
Development
residential
Inspector
V Simpson
Postcode
SL5 0AP

Main issues, as the Inspector framed them

  • the effect of the development on climate change
  • the effect of the development on the Thames Basin Heaths Special Protection Area (the SPA)

What decided it

The failure to secure a signed planning obligation providing SAMM and SANG mitigation measures meant that a likely adverse effect on the integrity of the Thames Basin Heaths SPA could not be ruled out, requiring refusal under the Habitat Regulations.

The modest housing benefits and efficient use of previously developed land were outweighed by the inability to rule out adverse effects on the SPA and the failure to secure carbon net-zero mitigation, with habitat site protection providing a strong reason for refusal that displaced the presumption in favour of sustainable development.

What the Inspector cited

Development plan policies
SP2QP1QP3NR4
National Planning Policy Framework
Paragraph 57Paragraph 11
Judgments
Westminster City Council v Gems House Residences Chiltern Street Ltd [2025] EWHC 1789

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 applied

The 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.

Appeals plan, £15 a month

With an account

What an account adds to this decision

113 other decided appeals within two kilometres of this site. In the app every dot opens its decision, and its letter wherever one was published, and you can draw your own site to see what has been decided around it.AllowedDismissedSplitThis decision
An appeal decision in the app, with the main issues, policies and judgments cited picked out beside the letter
Every letter, there to read. We pick out the main issues, the policies and the judgments cited, so you can work through the letter faster.
Searching the full text of appeal decision letters in the app
Search inside every letter. By words or by meaning, filtered by authority, outcome, appeal type and procedure, with every locatable decision on the map and the Inspector named on each.
Start your free trial

More decisions in Royal Borough of Windsor and Maidenhead

The authority’s record since 2016 · every decision in 2026

  1. Allowed27 October 20266007126
    Grove Park Industrial Estate Waltham Road, White Waltham, Maidenhead, SL6 3JF
  2. Allowed26 October 20266014376
    Roseland, High Road, Cookham, Maidenhead, SL6 9JS
  3. Dismissed21 October 20266009694
    Land Adjacent to Stud Green Farm, Sturt Green, Holyport, SL62JH
  4. Dismissed9 October 20266009005
    59 to 61 and Land to the Rear of 59 to 61 St Leonard's Road, Windsor, SL4 3BX
  5. Notice upheld24 September 20263353235
    Sunnyside Stanwell Road, Horton, Slough, SL3 9PE

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.

In the app this decision sits on the map beside every appeal around it, with its letter to read and the main issues, policies and judgments cited picked out.