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16 Mardley Avenue Welwyn AL6 0UD

6/2026/1570/HOUSEHOUSEHOLDER APPLICATIONApproved
Householder

Approved on 6 November 2026

Council decision: Granted2 conditions

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

Proposal

Proposed loft conversion, enlargement of the existing roof with increase in ridge height to form a truncated hipped roof, installation of two front dormers, a rear dormer with a rear balcony, and associated rooflights

Received
9 September 2026
Ward
Welwyn East
  1. Received9 Sep
  2. Validated9 Sep
  3. Consult.
  4. Target
  5. Decided6 Nov

Decided in 58 days (council typically 56)

About this application

This is a planning application for a loft conversion at 16 Mardley Avenue Welwyn AL6 0UD. Welwyn Hatfield has handled 57 applications of this type. This one was decided in 58 days. There has been 1 other application at this address. In the past year there have been 105 applications across Welwyn East. We hold 969 applications in total for the AL6 postcode area.

81% of householder applications at Welwyn Hatfield Borough 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

Application details

Postcode
AL6 0UD
Application type
HOUSEHOLDER APPLICATION
Parish
Welwyn

Planning application dates

Date validated
9 September 2026

Applicant and agent

Applicant
Private applicant
Agent address
Flat 4 33 Mowbray Road London NW6 7QS

Planning decision

Case officer
Mrs Sarah Madyausiku

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)

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

Also checked, none recorded (22)

flood storage areas, conservation areas, listed buildings, 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.

Planning history at this site

1 other application at this property, newest first.

  1. 2023
    24 Mar

    Fell T1 dead Horse Chestnut within TPO 24 Area 3

    ApprovedTrees6/2023/0670/TPO

Source: Welwyn Hatfield

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