England · Local authority

Welwyn Hatfield planning applications

PlanningTrack collects planning applications and decisions from the public planning register of Welwyn Hatfield Borough Council. Search an address, application reference or proposal. Official Welwyn Hatfield website

Collected application statistics

Collected records · All available dates

40,297Searchable applications

283Recorded as pending

86%Approval rate · 33,821 approved or refused records

4,819Refused applications

29,002 approved · 4,819 refused · 2,219 withdrawn. Received dates in our records: 29 Apr 1948 to 29 Oct 2026. Most recent record check: 8 Nov 2026. Counts reflect the last collected status; some records may be out of date.

Local planning information

Council sources checked 14 Sept 2026

Planning information Planning and building Local plan Our Local Plan Pre-application advice Pre-application advice (planning applications)Conservation areas Schedule of properties removed from the Welwyn Conservation Area Article 4 directions Article 4 Directions

Conservation areas and Article 4 directions

Explore published planning boundaries and follow their source records for designation details. Coverage varies: an empty map does not mean there are no restrictions. Check the council’s current maps and documents before relying on a boundary.

Conservation areas9 mapped area records

Article 4 direction areasNo boundary records available in this collection

Interactive planning map loads with JavaScript. Dataset sources are linked below.

Download Article 4 coverage for all authorities (CSV)

Data downloaded 14 Sept 2026. Display boundaries are simplified and indicative. Map record counts are not a complete count of designations or directions.

Sources: Planning Data conservation areas and Article 4 direction areas. Contains public sector information licensed under the Open Government Licence v3.0.

More application records

Decided - Granted6/2016/1076/EM
Erection of a single storey rear extension following demolition of existing rear conservatory and alterations to openings
30 Longcroft Lane, Welwyn Garden City, AL8 6EA
Received 24 May 2016
Decided - Granted6/2018/0299/HOUSE
Erection of single storey rear extension and side infill extension
24 Parkfields Welwyn Garden City AL8 6ED
Received 30 Jan 2018
Decided - Granted6/2017/2306/EM
Erection of 12ft x 8ft office/studio to rear of property and decking following demolition of existing decking
55 Great Ganett Welwyn Garden City AL7 3DB
Received 9 Oct 2017
Decided - RefusedN6/2007/0784/EM
PROPOSED HARDSTANDING AND INSTALLATION OF SOLAR PANEL TO ROOF
58 Kirklands, Welwyn Garden City, AL8 7RD
Received 22 May 2007
Decided - Granted6/2020/2629/HOUSE
Partial conversion of existing garage, single storey rear extension, first floor side extension and insertion of side access gate
63 Pentley Park Welwyn Garden City AL8 7SF
Received 12 Oct 2020
Decided - Refused6/2022/0523/HOUSE
Retention of a single storey side extension with an attached front garage (retrospective)
95 Robbery Bottom Lane Welwyn AL6 0UL
Received 4 Mar 2022
Decided - GrantedS6/2013/1305/DS
Discharge of conditions 9 (Lifetime Homes), 10 (Archaelogy) and 11 (Cross-over) from planning application S6/2012/1658/FP
24 Dellsome Lane, Welham Green, Hatfield, AL9 7NF
Received 17 Jun 2013
Decided - Refused6/2023/2532/LAWP
Certificate of lawfulness for erection of a single storey rear extension
16 Great North Road Welwyn Hertfordshire AL6 0PL
Received 20 Dec 2023
Decided6/2017/2210/TPO
Fell 1x Cherry Tree (T1) - Conservation Area
Hill House Park Street Hatfield AL9 5AZ
Received 28 Sept 2017
Decided - RefusedS6/2014/0546/LUP
Certificate of lawfulness for proposed outbuilding for gym & swimming pool
Zither Great North Road Brookmans Park Hatfield AL9 6ND
Received 14 Mar 2014
Decided - Granted6/2018/1244/LAWP
Certificate of lawfulness for the erection of garage and swimming pool outbuildings
Tylersley Farm Tylers Causeway Newgate Street Hertford SG13 8QN
Received 11 May 2018
Decided - Granted6/2025/1867/LAWP
Certificate of lawfulness for loft conversion, raising hip end to form gable with rear dormer window and rooflight within the front roofslope
17 Heathcote Avenue Hatfield AL10 0RQ
Received 2 Sept 2025
Decided - GrantedN6/2009/2101/DS
DISCHARGE OF CONDITION 8 (BOUNDARY TREATMENT) FROM PLANNING PERMISSION N6/2008/1342/FP
4 Harmer Green Lane Digswell Welwyn AL6 0AD
Received 28 Sept 2009
Decided - GrantedS6/2008/0890/MA
CONSTRUCTION OF PLANT ROOM
UNIVERSITY OF HERTFORDSHIRE, COLLEGE LANE, HATFIELD, HERTFORDSHIRE, AL10 9AB
Received 4 Jun 2008
Decided6/2020/1531/TC
Fell 1 x dead Medlar tree, lift crown of Mulberry Tree (specified in photograph which branches to be removed) and thin crown of Plum tree by 30% in order to abate overwhelming of several neighbouring species (Laburnum, American Oak and flowering shrub)
21 High Oaks Road Welwyn Garden City AL8 7BJ
Received 29 Jun 2020
Decided - GrantedN6/2004/1737/FP
ERECTION OF SINGLE STOREY SIDE EXTENSION AND REAR CONSERVATORY
6 Fordwich Road Welwyn Garden City AL8 6EY
Received 24 Nov 2004
Decided - GrantedS6/2008/1371/FP
ERECTION OF SIDE EXTENSION TO CREATE END OF TERRACE DWELLING
48 Birchwood Close Hatfield AL10 0PP
Received 9 Aug 2008
Decided - WithdrawnN6/2008/0820/FP
ERECTION OF BOUNDARY FENCE
3 Holwell Hyde, Welwyn Garden City, AL7 3DJ
Received 23 May 2008
Decided - Granted6/2019/0218/LB
Conversion of Northaw House to form 11 apartments (including refurbishment of existing single caretaker’s flat) and underground parking area, the Ballroom Wing to form 2 dwellings, the Stable Block to form 1 dwelling, refurbishment of existing dwelling at Oak Cottage, 3 dwellings within the Walled Garden, 7 dwellings within the Settlement Area, refurbishment of the Walled Garden, refurbishment of access routes and reinstatement of old route, provision of hard and soft landscaping, car parking and supporting infrastructure
Northaw House Coopers Lane Northaw Potters Bar EN6 4NG
Received 1 Feb 2019
Decided - Granted6/2018/0583/HOUSE
Erection of single storey rear and front extension including alterations to openings following demolition of rear conservatory
53 Woods Avenue Hatfield AL10 8QF
Received 28 Feb 2018
Decided - GrantedN6/2015/0703/DS
Approval of details reserved by condition 3 (materials) of planning permission N6/2014/2746/FP
8 Densley Close, Welwyn Garden City, AL8 7JX
Received 30 Mar 2015
Decided - Granted6/2017/2940/COND
Submission of details pursuant to condition 1 (material samples), 2f (tree protection measures), 5 (collection, containment and removal scheme for manure), 6 (external lighting scheme), 7 (dusk emergence survey) and 8 (green roof details) on planning permission 6/2016/2706/MAJ dated 20/06/17
Ponsbourne Riding School Newgate Street Hatfield SG13 8QS
Received 20 Dec 2017
Decided - Withdrawn6/2018/0149/EM
Extension of hand standing to include one additional car parking space.
Land to the front of 252, 254, 256 and 258 Heronswood Road Welwyn Garden City AL7 3JQ
Received 16 Jan 2018
Decided - Refused6/2024/1132/FULL
Retention of the change of use of a dwelling (C3) to a house in multiple occupation (HMO) (C4)
142 Aviation Avenue Hatfield AL10 9UE
Received 17 Jun 2024

Records are ordered by application ID, not submission date. Use search to find a particular address or proposal.

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Researching a proposal in Welwyn Hatfield Borough Council

Start with the address or application reference. Open a record to read the proposal, dates and available documents, then check the official register for the latest plans and consultation details. If nothing appears, check coverage before treating the result as a complete planning history.

How to search planning applications

Guides to planning records

All planning guides

Understanding planning · 13 min read
Planning application documents: what to read first
Understand planning application documents, officer reports and decision notices. Use a reading checklist, document table and worked example to inspect a case.
UK research
Published 16 Jul 2026Updated 13 Sept 2026
Understanding planning · 13 min read
Planning permission drawings: how to read plans
Read planning drawings, floor plans, elevations and sections. Use labelled diagrams, a drawing comparison table and revision checks to understand a proposal.
UK research
Published 6 Aug 2026Updated 13 Sept 2026
Property research · 13 min read
Planning approval rates: how to read council statistics
Understand planning approval rates with an interactive calculator, worked examples and comparison table. Check sample sizes, outcomes and coverage before comparing.
UK research
Published 13 Aug 2026Updated 13 Sept 2026

What these statistics cover

These figures describe applications collected by PlanningTrack for Welwyn Hatfield Borough Council, across all dates currently available. They are a partial dataset, rather than an authority-wide performance measure. The date range does not establish continuous historical coverage.

The approval percentage is approved records divided by approved plus refused records. Pending, withdrawn and unknown outcomes are excluded. No percentage is shown until there is an approved or refused record.

Check collection coverage