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21A Lower Road Great Amwell Hertfordshire SG12 9SZ

3/26/1027/ASDPNAdditional Storeys on a Dwelling PNApproved
Prior approval

Approved on 8 September 2026

Council decision: Prior Approval Req/Grant with Conditions7 conditions

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

Prior approval application for construction of additional storey to create first floor living accommodation, height of 6.67 m

Received
22 July 2026
Ward
Great Amwell & Stansteads
  1. Received22 Jul
  2. Validated22 Jul
  3. Consult.18 Aug
  4. Target9 Sep
  5. Decided8 Sep

Decided in 48 days

About this application

This is a planning application at 21A Lower Road Great Amwell Hertfordshire SG12 9SZ. East Hertfordshire has handled 13,484 applications of this type. This one was decided in 48 days, 2 weeks quicker than East Hertfordshire's typical decision time. There has been 1 other application at this address. In the past year there have been 55 applications across Great Amwell & Stansteads. We hold 1,482 applications in total for the SG12 postcode area.

Application details

Postcode
SG12 9SZ
Application type
Additional Storeys on a Dwelling PN
Scale / size
Small
Parish
Great Amwell Parish Council

Planning application dates

Date validated
22 July 2026
Last date for comments
18 August 2026
Target decision date
9 September 2026

Applicant and agent

Applicant
Private applicant
Architect profile
AT DESIGN (WELWYN) LTD
Agent address
30C High Street Welwyn AL6 9EQ

Planning decision

Case officer
Sarah Griffee
Statutory period
49 days

Additional information

Planning Portal ID
PP-15096137
Comments
0
Documents
7
Constraints
12

Site constraints

Checking the site
2/3
Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

  • Green belt: East Hertfordshire
  • Flood zone 1: Low probability (rivers and sea)

Not published by this council, so not checked: Article 4 directions. Ask the council if these matter.

Possibly incomplete for this council: tree preservation orders.

Also checked, none recorded (21)

flood storage areas, conservation areas, listed buildings, 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: East Hertfordshire

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