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Allowed29 January 20263369423

12-14 Marshalsea Road, London, SE1 1HL

Planning appeal 3369423 at 12-14 Marshalsea Road, London, SE1 1HL (London Borough of Southwark) was allowed on 29 January 2026 by Inspector Chamberlain G, by written representations. The main issue, as the Inspector framed it: The effect of the proposed amendments to the fenestration in the rear elevation of the appeal building on the significance of the Liberty of the Mint Conservation Area.

Extension of existing mansard roof to create full storey (6th floor), erection of new mansard roof above, change of use of part ground floor from office (B1(a)) to café (A1/A3), change of use of first to fifth floors from offices (B1(a)) to 5 x two bedroom flats, use of new roof level as 2 x two bedroom flats, refuse and cycle storage at ground floor, formation of roof terrace and installation of plant to roof

Authority
London Borough of Southwark
Appeal type
minor · Planning Appeal
Procedure
Written Representations
Development
residential · Other minor developments
Inspector
Chamberlain G
Postcode
SE1 1HL

Main issues, as the Inspector framed them

  • The effect of the proposed amendments to the fenestration in the rear elevation of the appeal building on the significance of the Liberty of the Mint Conservation Area

What decided it

The proposed window alterations, although larger than approved, are to a rear elevation visible only in glimpsed views from a side street and do not stand out as discordant when viewed in the context of the already-approved modern window scheme and adjacent modern buildings, thus preserving the conservation area's significance.

What the Inspector cited

Development plan policies
Policy HC1 of the London PlanPolicy P13 of the Southwark Local PlanPolicy P14 of the Southwark Local PlanPolicy P20 of the Southwark Local PlanPolicy P21 of the Southwark Local Plan

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 London Borough of Southwark

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

  1. Allowed20 October 20266010489
    269-275 Rye Lane and 1A Philip Walk, London, SE15 4UA
  2. Dismissed30 September 20266001859
    5 More London Place, London, SE1 2BY
  3. Dismissed29 September 20266003226
    Flat 4, 99 Kennington Park Road, London, SE11 4JJ
  4. Dismissed16 September 20266012237
    123 Benhill Road, London, SE5 7LZ
  5. Dismissed17 August 20266007608
    134 Tappesfield Road, London, SE15 3EZ

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.