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Planning appeal decision

Allowed28 January 20266001219

11 Blenheim Avenue, Southampton, SO17 1DW

Planning appeal 6001219 at 11 Blenheim Avenue, Southampton, SO17 1DW (Southampton City Council) was allowed on 28 January 2026 by Inspector Cahalane R, by written representations. The main issue, as the Inspector framed it: The effect of the proposed development on the character and appearance of the Oakmount Triangle Conservation Area.

This application is to replace all the first and second floor windows at the front of the house with high-efficiency, Residence R9 heritage-style uPVC windows, that are designed to authentically replicate 19th Century timber designs. The new windows will sit flush with the new frames, with hinges and a grained white coloured finish to match existing

Authority
Southampton City Council
Appeal type
householder · Householder (HAS)
Procedure
Written Representations
Development
residential · Householder developments
Inspector
Cahalane R
Postcode
SO17 1DW

Main issues, as the Inspector framed them

  • The effect of the proposed development on the character and appearance of the Oakmount Triangle Conservation Area

What decided it

The proposed uPVC windows, designed to sit flush with new frames in a grained white finish with matching hinges and minor proportional differences, would preserve rather than harm the character and appearance of the conservation area.

What the Inspector cited

Development plan policies
Saved Policy HE1 of the City of Southampton Local Plan Review (adopted 2015)Saved Policy CS14 of the Local Development Framework Core Strategy Development Plan Document (Amended Version incorporating the Core Strategy Partial Review March 2015)

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

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More decisions in Southampton

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

  1. Notice upheld15 September 20263371847
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  2. Notice upheld14 September 20263373218
    17 Vespasian Road, Southampton, SO18 1AY
  3. Dismissed27 August 20266010618
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  4. Dismissed27 August 20266010617
    Pavment Outside 10 Bargate Street, Southampton, SO14 2DA
  5. Notice upheld13 August 20263377915
    124 Bevois Valley Road, Southampton, SO14 0JZ

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.