Planning appeal decision
3 Warden Avenue, Rayners Lane, Harrow, HA2 9LP
Planning appeal 3341897 at 3 Warden Avenue, Rayners Lane, Harrow, HA2 9LP (London Borough of Harrow) was dismissed on 23 May 2024 by Inspector Andrews M, by written representations. The main issue, as the Inspector framed it: The use of the outbuilding as regards its form of occupancy.
a change of use of outbuilding at the rear from a gym to an annexe ancillary to the dwelling (retrospective application)
- Authority
- London Borough of Harrow
- Appeal type
- householder · Householder (HAS)
- Procedure
- Written Representations
- Development
- residential · Householder developments
- Inspector
- Andrews M
- Postcode
- HA2 9LP
Main issues, as the Inspector framed them
- The use of the outbuilding as regards its form of occupancy
What decided it
The independent pedestrian access to the outbuilding from the shared accessway, combined with the absence of evidence justifying the need for ancillary accommodation and the self-contained nature of the facilities, created a realistic risk of independent use as a separate dwelling in breach of garden land development policy.
What the Inspector cited
- Development plan policies
- Policy CS1 BLondon Plan 2021Harrow Development Management Policies Local Plan 2013Harrow Supplementary Planning Document: Garden Land Development April 2013
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


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The authority’s record since 2016 · every decision in 2024
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- Dismissed16 October 2026601122330 Kenmore Avenue, Kenton, HA3 8PQ
- Dismissed16 October 2026600828424 Uxbridge Road, Stanmore, Harrow, HA7 3LG
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.
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