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15 Chambers Gate Stevenage Herts SG1 3XE

26/00707/HPARefused

Refused on 30 October 2026

Council decision: Prior Approval Required and Refused3 reasons for refusal

Site boundary (council red line)

Proposal

Single storey rear extension which will extend beyond the rear wall of the original house by 4 m, for which the maximum height will be 3.5 m and the height of the eaves will be 2.5 m.

Received
25 September 2026
Public comments
1 · last counted 4 November 2026
Ward
Old Town
  1. Received25 Sep
  2. Validated25 Sep
  3. Consult.
  4. Target
  5. Decided30 Oct

Decided in 35 days

About this application

This is a planning application for a single storey rear extension at 15 Chambers Gate Stevenage Herts SG1 3XE. Stevenage has handled 1,782 applications of this type. This one was decided in 35 days, 2 weeks quicker than Stevenage's typical decision time. There are no previous applications recorded at this address. In the past year there have been 60 applications across Old Town. We hold 993 applications in total for the SG1 postcode area.

Why it was refused

  1. The development for the proposed single storey rear extension has commenced. Therefore, the proposed development would fail to accord with Schedule 2, Part 1, Class A (A.4) (2), and (A.4) (10) of the Town and Country Planning (General Permitted Development) (England) Order 2015 and therefore, requires planning permission.
  2. Insufficient evidence has been submitted to satisfy the Local Planning Authority that the development would not harm the amenities of neighbouring properties in accordance with Schedule 2, Part 1, Class A.4(7) to (9) of the Town and County Planning (General Permitted Development) (England) Order 2015 (As amended) and therefore, prior approval is required and refused
  3. No evidence has been provided as to the materials to be used in the construction of the proposed extension and therefore it is not possible to determine if they will have a similar appearance to the exterior of the existing dwellinghouse as per Schedule 2, Part 1, Class A, Condition A.3(a) of the Town and Country Planning (General Permitted Development) Order (England) 2015.

From the council's decision notice.

Application details

Postcode
SG1 3XE
Parish
To Follow

Planning application dates

Date validated
25 September 2026

Applicant and agent

Applicant
Private applicant

Planning decision

Case officer
Aliya Muskaan Khalil

Additional information

Documents
5

Site constraints

Checking the site
2/3
Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

  • Article 4 direction: Stevenage
  • Flood zone 1: Low probability (rivers and sea)
Also checked, none recorded (23)

flood storage areas, conservation areas, listed buildings, 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: Stevenage

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