17 Lyndon Mead, Sandridge, St Albans, AL4 9EX

Planning appeal 6010603 at 17 Lyndon Mead, Sandridge, St Albans, AL4 9EX (St Albans City Council) was allowed on 8 September 2026 by Inspector J Bell-Williamson, 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 Framework and relevant development plan policies.

Double storey side extension to replace existing single storey side extension, small rear infill extension, reconfiguration of ground and first floor to provide better layout

Authority: St Albans City Council
Appeal type: householder · Householder
Procedure: Written
Development: residential
Inspector: J Bell-Williamson
Postcode: AL4 9EX

Main issues, as the Inspector framed them

whether the proposal would be inappropriate development in the Green Belt having regard to the Framework and relevant development plan policies
whether any harm by reason of inappropriateness would be clearly outweighed by other considerations, so as to amount to the very special circumstances required to justify the proposal

What decided it

The proposed extension would not result in a disproportionate addition to the original building's size when assessed against the Framework's policy GB7 criteria, as the external dimensions would not be disproportionately altered despite the quantitative increase in floorspace.

What the Inspector cited

Development plan policies: Policy 1Policy 13Policy LG9
National Planning Policy Framework: Policy GB7
Judgments: Holborn Studios Ltd v The Council of the London Borough of Hackney [2017] EWHC 2823 (Admin); Bernard Wheatcroft Ltd v SSE [JPL 1982 P37]

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.

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The decision letter

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

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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.