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46 Overstone Road Harpenden Hertfordshire AL5 5PJ

5/2025/2005Certificate of Lawfulness - (proposed)Refused
Outline / PiP

Refused on 23 December 2025

Council decision: Certificate of Lawfulness RefusedDelegated (officer decision)2 reasons for refusal

Approximate location: the centre of the postcode, not the exact property.

Proposal

Certificate of Lawfulness (proposed) - The proposal seeks to add a front porch to the property and remove the existing dormer and replace it with an improved larger scale dormer extension at 46 Overstone Road Harpenden Hertfordshire AL5 5PJ

Received
31 October 2025
Decision level
Delegated (officer decision)
Ward
Harpenden West
  1. Received31 Oct
  2. Validated3 Nov
  3. Consult.12 Dec
  4. Target12 Dec
  5. Decided23 Dec

Decided in 50 days (council typically 56)

About this application

This is an outline application for a dormer extension at 46 Overstone Road Harpenden Hertfordshire AL5 5PJ. St Albans has handled 912 applications of this type. This one was decided in 53 days, 3 days quicker than St Albans's typical decision time. There have been 2 other applications at this address. In the past year there have been 196 applications across Harpenden West. We hold 3,774 applications in total for the AL5 postcode area.

71% of outline applications at St Albans City and District Council were approved. Across all application types, the council typically decides in about 8 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. A Certificate of Lawfulness (proposed) cannot be issued on the basis that it has not been demonstrated to the satisfaction of the Local Planning Authority that the proposal would constitute a porch for the purposes of Class D. This is because the proposal, based on the information provided, would not be erected outside an external door at the dwellinghouse. Moreover, the proposal would fail to comply with criterion e(i) of Class A, Schedule 2, Part 1 of the Town and Country Planning (General Permitted Development) (England) Order 2015 [as amended] as it would result in a development that extends beyond a wall forming a principal elevation of the dwellinghouse.
  2. In addition, the proposed dormer window would fail to comply with condition B.2(a) as it would not be constructed of materials which are of a similar appearance to those used in the construction of the exterior of the existing dwellinghouse. Formal planning permission would therefore be required. Christine Traill Strategic Director – Community and Place Delivery Dated 23/12/2025 First Schedule (Development/Use) - Certificate of Lawfulness (proposed) - The proposal seeks to add a front porch to the property and remove the existing dormer and replace it with an improved larger scale dormer extension Second Schedule (Location) - 46 Overstone Road Harpenden Hertfordshire

From the council's decision notice.

Application details

Postcode
AL5 5PJ
Application type
Certificate of Lawfulness - (proposed)
Scale / size
Small
Parish
Harpenden Town

Planning application dates

Date validated
3 November 2025
Consultation expiry
12 December 2025
Consultation end
12 December 2025
Target decision date
12 December 2025
Application expires
28 December 2025

Applicant and agent

Applicant
Private applicant

Planning decision

Statutory period
55 days

Additional information

Planning Portal ID
PP-14433025
Documents
11

Site constraints

Checking the site
2/3
Council recordsAppealsFlood risk

Designations at the address point. Ones next to the site may also apply.

  • 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.

Associated applications

  1. 2025
    31 Oct

    Ground and first floor rear extension. Including new windows and new rooflights. Alterations to existing rear…

    DC3 Conditional PermissionFullFiled alongside5/2025/2004
  2. 2025
    31 Oct

    Certificate of Lawfulness (proposed) - The proposal seeks to add a front porch to the property and remove the…

    This applicationRefusedOutline5/2025/2005

Source: St Albans

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