The Horniman Museum & Gardens, 100 London Road, London, SE23 3PQ

DC/26/143238Full Planning PermissionPermitted

Full

Proposal

Internal and external upgrade improvement works of the existing CUE building, replacement of gas boiler with air-to-water source heat pumps, installation of a new mechanical ventilation heat recovery (MVHR), together with new floor insulation, draught proofing, sealing windows, air and box beams vents on the roof, new electrical cables and repairs to external timbers at Horniman Museum, 100 London Road SE23.

Received: 6 March 2026
Decided: 23 May 2026 · Granted
Decision level: Delegated (officer decision)
Council: London Borough of Lewisham
Ward: Forest Hill

Approximate site (title boundary)

Boundary © HM Land Registry, © Ordnance Survey · details

This information is subject to Crown copyright and database rights 2026 and is reproduced with the permission of HM Land Registry. The polygons (including the associated geometry, namely x, y co-ordinates) are subject to Crown copyright and database rights 2026 Ordnance Survey AC0000851063. Conditions of use.

ReceivedSubmitted6 Mar
ValidatedValidated31 Mar
Consult.Consultation26 May
TargetTarget Date26 May
DecidedDecided23 May

Decided in 53 days (council typically 56)

8 weeks typical decision time in Lewisham85% of full applications approved

This is a full planning application for window replacement at THE HORNIMAN MUSEUM & GARDENS, 100 LONDON ROAD, LONDON, SE23 3PQ. Lewisham has handled 2,816 applications of this type and approves 81% of them, typically deciding them in 66 days. This one was decided in 78 days, 12 days longer than Lewisham's median. The site is in a conservation area, with 4 listed buildings nearby. There have been 11 other applications at this address. In the past year there have been 196 applications across Forest Hill. We hold 2,595 applications in total for the SE23 postcode area.

Application Details

Reference

DC/26/143238

Address

THE HORNIMAN MUSEUM & GARDENS, 100 LONDON ROAD, LONDON, SE23 3PQ

Postcode

SE23 3PQ

Local Authority

Lewisham

Application Type

Full Planning Permission

Scale / Size

Small

Decision Status

Permitted

Current Status

Decided

Ward

Forest Hill

Applicant & Agent

Agent

PRS Architects

Agent Address

Studio 4, 33 Stannary Street, Studio 4, 33 Stannary Street, London, SE11 4AA

Planning Application Dates

Date Received

6 March 2026

Consultation Expiry

8 April 2026

Target Decision Date

26 May 2026

Date Decided

23 May 2026

Date Validated

31 March 2026

Date Submitted

6 March 2026

Neighbour Consultation Start

31 March 2026

Last Date for Comments

26 May 2026

Planning Decision

Decision

Granted

Decided By

Delegated

Statutory Period

56 days

Publicity

Last Advertised

8 April 2026

Appeal

Additional Information

Planning Portal ID

PP-14754515

Comments

Documents

Constraints

Coordinates

51.441130, -0.060737

Enriching application data

2/3

Council recordsAppealsFlood risk

Source: Lewisham

Contains public sector information from the Planning London Datahub, licensed under the Open Government Licence v3.0.

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Associated applications

2026
12 Mar
FRONT (London Rd): ONE Bay (T1)(ht.7m) FELL. Reason: it is located approximately 1m from the main foundations…
ApprovedTrees in Conservation AreasFiled alongsideDC/26/143344
2026
6 Mar
Internal and external upgrade improvement works of the existing CUE building, replacement of gas boiler with…
This applicationApprovedFullDC/26/143238
2026
6 Mar
Replacement of the existing gas cabinet air heater with air-to-air source heat pump (ASHPs) and air handling…
ApprovedFull Planning PermissionFiled alongsideDC/26/143242

Planning history at this site

13 other applications at this property, newest first.

Planning constraints

Designations that overlap or adjoin the site outline.

Conservation area: Forest Hill
Listed building: Grade II: Coombe Cliffe ConservatoryOn this site · +3 more
Article 4 direction: Small HMO Northern Extension+2 more
Registered park and garden: Horniman Gardens
Flood zone 1: Low probability (rivers and sea)

Possibly incomplete for this council: tree preservation orders.

Also checked, none recorded (19)

flood storage areas, green belt, scheduled monuments, World Heritage Sites, World Heritage Site buffer zones, registered battlefields, Heritage at Risk entries, nutrient neutrality catchments, national parks, National Landscapes, SSSIs, Special Areas of Conservation, Special Protection Areas, Ramsar sites, ancient woodland, national nature reserves, local nature reserves, heritage coasts and brownfield registers.

A guide only, from official open data; it is not a planning search. Flood zones cover rivers and sea, not surface water.

© Historic England 2026. Contains Ordnance Survey data © Crown copyright and database right 2026. The Historic England GIS Data contained in this material was obtained on 2026-10-09. The most publicly available up to date Historic England GIS Data can be obtained from HistoricEngland.org.uk.

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