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18 Carlton Way Cambridge Cambridgeshire CB4 2BZ

26/00154/FULFull ApplicationRefused
Full

Refused on 12 March 2026

Council decision: Refused PermissionDelegated (officer decision)2 reasons for refusal

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.

Proposal

Conversion of Existing Dwelling (C3) to 11 Bedroom 11 Person HMO (Sui Generis) together with side dormer roof extensions.

Received
16 January 2026
Decision level
Delegated (officer decision)
Ward
West Chesterton
Agent
Peter Philip Developments Ltd
  1. Received16 Jan
  2. Validated16 Jan
  3. Consult.24 Feb
  4. Target13 Mar
  5. Decided12 Mar

Decided in 55 days (council typically 49)

About this application

This is a full planning application for a dormer extension at 18 Carlton Way Cambridge Cambridgeshire CB4 2BZ. Cambridge has handled 1,534 applications of this type. This one was decided in 55 days, 6 days longer than Cambridge's typical decision time. The site is in a conservation area, with 20 listed buildings nearby. There have been 3 other applications at this address. In the past year there have been 117 applications across West Chesterton. We hold 1,501 applications in total for the CB4 postcode area.

90% of full applications at Cambridge City Council were approved. Across all application types, the council typically decides in about 7 weeks (median).

Based on decided applications received in the last 3 years.Planning something similar? See what gets approved on your street

Why it was refused

  1. The proposed dormer roof extensions would resemble an unsympathetic form of development due to their excessive scale and bulk. The extensions would dominate the existing roofscape and detract from the uniform appearance and form of the existing dwelling and neighbouring dwellings along this part of Carlton Way, and fail to preserve the character and appearance of the area. As such, the proposal is contrary to policies 55, 56, 58 and 59 of the Cambridge Local Plan 2018 and Paragraphs 135 and 139 of the National Planning Policy Framework (2024).
  2. The proposal does not provide an adequate level of internal amenity for future occupiers due to the lack of any communal/living room area and would force occupiers to live in their bedrooms. This lack of internal communal living space would subsequently result in occupiers spilling out into the rear garden more often than usual, and result in noise and disturbance upon the neighbouring properties. As such, the proposal is contrary to policies 35, 48, 55 and 58 of the Cambridge Local Plan 2018 and Paragraph 135 of the National Planning Policy Framework (2024).

From the council's decision notice.

Application details

Postcode
CB4 2BZ
Application type
Full Application
Scale / size
Small
District
Cambridge City Council

Planning application dates

Date validated
16 January 2026
Last date for comments
24 February 2026
Target decision date
13 March 2026

Applicant and agent

Agent
Peter Philip Developments Ltd
Architect profile
PETER PHILIP DEVELOPMENTS LTD
Agent address
Cubo Work 12 King St Nottingham NG1 2AS

Planning decision

Statutory period
56 days

Additional information

Documents
25

Site constraints

Checking the site
2/3
Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

  • Flood zone 1: Low probability (rivers and sea)
Also checked, none recorded (24)

flood storage areas, conservation areas, listed buildings, Article 4 directions, tree preservation orders, green belt, scheduled monuments, World Heritage Sites, World Heritage Site buffer zones, registered parks and gardens, 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.

Data © Crown copyright and others · sources and licences

Contains public sector information from planning.data.gov.uk (MHCLG and local planning authorities), licensed under the Open Government Licence v3.0. © Crown copyright and database right 2026.

© 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 2026-11-03. The most publicly available up to date Historic England GIS Data can be obtained from HistoricEngland.org.uk.

© Natural England copyright. Contains Ordnance Survey data © Crown copyright and database right 2026.

© Environment Agency copyright and/or database right 2026. All rights reserved. Flood Map for Planning, Open Government Licence v3.0.

Contains Ordnance Survey data © Crown copyright and database right 2026.

Source: Office for National Statistics licensed under the Open Government Licence v.3.0. Contains OS data © Crown copyright and database right 2026.

Source: Cambridge

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