Demolition plans in Welwyn Hatfield

154 demolition applications were submitted in Welwyn Hatfield in the last 12 months, from garages and outbuildings to whole buildings. Of the 114 decided so far, 96 were approved. Demolish-and-rebuild schemes also appear under planned new homes.

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Showing 28 of 28 applications
16 Oct 2026 Under Consultation 6/2026/1761/FULL

12-14 Bell Lane Brookmans Park AL9 7AY

Erection of one dwelling, with garage wing, external landscaping and associated works following demolition of existing dwelling and outbuildings

FULL PERMISSION Welwyn Hatfield
6 Oct 2026 Under Consultation 6/2026/1708/EM

Land adjacent to Beehive Pub Beehive Lane Welwyn Garden City AL7 4BW

Erection of 4 new build residential properties following the demolition of derelict bungalow

ESTATE MANAGEMENT Welwyn Hatfield
1 Oct 2026 Under Consultation 6/2026/1735/MAJ

Royal Veterinary College Hawkshead Lane North Mymms AL9 7TA

Erection of a small animals teaching hospital (Use Class F1), together with associated parking, landscaping, servicing, plant and associated works fol...

MAJOR DEVELOPMENT Welwyn Hatfield
29 Sept 2026 Under Consultation 6/2026/1647/HOUSE

19 Walker Grove Hatfield AL10 9PL

Erection of a single storey rear extension with balcony and the installation of glass balustrade, and proposed air conditioning unit, following the de...

HOUSEHOLDER APPLICATION Welwyn Hatfield
28 Sept 2026 Under Consultation 6/2026/1707/FULL

Welwyn Garden City Cadet Centre Lemsford Lane Welwyn Garden City AL8 6WW

Demolition of existing buildings and erection of a new Joint Cadet Centre, external store, associated soft and hard landscaping and associated works

FULL PERMISSION Welwyn Hatfield
25 Sept 2026 Under Consultation 6/2026/1690/HOUSE

113 The Ridgeway Northaw EN6 4BG

Erection of ground floor front extension, proposed roof extension including side box dormer, front dormer window, installation of rooflights, demoliti...

HOUSEHOLDER APPLICATION Welwyn Hatfield
22 Sept 2026 Under Consideration 6/2026/1633/FULL

23 The Ridgeway Cuffley EN6 4BB

Erection of new 5 bed dwelling following the demolition of existing dwelling

FULL PERMISSION Welwyn Hatfield
21 Sept 2026 Under Consultation 6/2026/1632/FULL

19 Pine Grove Brookmans Park AL9 7BP

Erection of dwelling following the demolition of existing dwelling

FULL PERMISSION Welwyn Hatfield
14 Sept 2026 Under Consultation 6/2026/1550/FULL

73 Mymms Drive Brookmans Park AL9 7AA

Erection of dwelling following demolition of existing dwelling

FULL PERMISSION Welwyn Hatfield
10 Sept 2026 Approved 23 Oct 6/2026/1577/HOUSE

1 The Orchard Welwyn Garden City AL8 7PL

Erection of a single storey rear extension following the part demolition of existing single storey rear extension.

HOUSEHOLDER APPLICATION Welwyn Hatfield
27 Aug 2026 Call In/Major Objection 6/2026/1441/FULL

22 The Avenue Welwyn AL6 0PP

Erection of one two-storey five bedroom detached dwelling and eight two bedroom flats laid out within two two storey blocks of four and associated inf...

FULL PERMISSION Welwyn Hatfield
26 Aug 2026 Under Consultation 6/2026/1476/HOUSE

9 Barleycroft Green Welwyn Garden City AL8 6JY

Replacement of existing wooden garage with wooden shed

HOUSEHOLDER APPLICATION Welwyn Hatfield
20 Aug 2026 To be Considered DMC-Date Agreed 6/2026/1474/FULL

108 Tolmers Road Cuffley Potters Bar EN6 4JR

Proposed replacement dwelling

FULL PERMISSION Welwyn Hatfield
19 Aug 2026 Under Consideration 6/2026/1431/FULL

Lodge Farm 124 Harmer Green Lane Digswell Welwyn AL6 0ET

Erection of four 4-bedroom detached dwellings with associated landscaping and parking, following the demolition of the existing stable building

FULL PERMISSION Welwyn Hatfield
19 Aug 2026 Under Consideration 6/2026/1466/HOUSE

36 Warren Way Digswell Welwyn AL6 0DN

Erection of two storey side extension, part single/two storey rear extension, insertion of two front dormer windows and front porch following the demo...

HOUSEHOLDER APPLICATION Welwyn Hatfield
17 Aug 2026 Refused 12 Oct 6/2026/1301/LAWP

20 Kingsmead Cuffley Potters Bar EN6 4AN

Certificate of lawfulness for the erection of an outbuilding and double garage within the curtilage of existing dwelling including formation of drivew...

LAWFUL DEVELOPMENT - PROPOSED Welwyn Hatfield
14 Aug 2026 Approved 9 Oct 6/2026/1339/EM

241 Daniells Welwyn Garden City AL7 1QD

Erection of single storey rear extension following demolition of conservatory & alterations to openings

ESTATE MANAGEMENT Welwyn Hatfield
13 Aug 2026 Under Consultation 6/2026/1426/FULL

6 Ross Close Hatfield AL10 0QT

Erection of dwelling, following demolition of outbuilding

FULL PERMISSION Welwyn Hatfield
13 Aug 2026 Under Consideration 6/2026/1434/FULL

Heathfield Lodge Great North Road Little Heath Potters Bar EN6 1JD

Erection of two-storey block of 4 x 2 bedroom apartments with parking and landscaped gardens following the demolition of existing bungalow

FULL PERMISSION Welwyn Hatfield
11 Aug 2026 Under Consideration 6/2026/1407/FULL

11 Georges Wood Road Brookmans Park AL9 7BY

Erection of new dwelling and associated hard and soft landscaping following demolition of the existing dwelling and the detached garage.

FULL PERMISSION Welwyn Hatfield
7 Aug 2026 Approved 4 Sep 6/2026/1385/PN14

Car Park at Bishops Square Hatfield Business Park Hatfield AL10 9NE

Prior approval for demolition of existing carpark building

DEMOLITION - PRIOR APPROVAL Welwyn Hatfield
7 Aug 2026 Call In/Major Objection 6/2026/1404/FULL

14 Hanyards Lane Cuffley Potters Bar EN6 4AT

Erection of a three storey dwelling with associated landscaping to front and rear, following the demolition of existing two storey dwelling

FULL PERMISSION Welwyn Hatfield
7 Aug 2026 Approved 1 Oct 6/2026/1264/FULL

53 Brookmans Avenue Brookmans Park AL9 7QG

Erection of dwelling with boundary wall and gates following demolition of existing property

FULL PERMISSION Welwyn Hatfield
5 Aug 2026 Refused 24 Sep 6/2026/1389/HOUSE

33 Roe Green Lane Hatfield AL10 0SH

Erection of part two-storey, part single storey rear and side extensions, single storey front extension, alterations to the roof including rear dormer...

HOUSEHOLDER APPLICATION Welwyn Hatfield
3 Aug 2026 Approved 20 Oct 6/2026/1352/HOUSE

6 Handside Green Welwyn Garden City AL8 6SQ

Erection of part single part double storey rear extension and single storey side extension to dwelling, fenestration alterations and erection of garag...

HOUSEHOLDER APPLICATION Welwyn Hatfield
31 Jul 2026 Approved 24 Sep 6/2026/1354/HOUSE

241 Daniells Welwyn Garden City AL7 1QD

Erection of single storey rear extension and alterations to opening following demolition of conservatory

HOUSEHOLDER APPLICATION Welwyn Hatfield
31 Jul 2026 Under Consideration 6/2026/1355/FULL

Welwyn Pump Station School Lane Welwyn AL6 9PL

Erection of nine dwellings following demolition of existing garages and office building with associated access, internal roads, parking, landscaping, ...

FULL PERMISSION Welwyn Hatfield
31 Jul 2026 Under Consideration 6/2026/1357/MAJ

Former Big Cat Sanctuary Codicote Road Codicote AL6 9TU

Erection of 109 residential units with access, parking, hard and soft landscaping, public open space and associated works following the demolition of ...

MAJOR DEVELOPMENT Welwyn Hatfield
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Frequently asked questions

Do you need planning permission to demolish a building?
Most demolition outside conservation areas is permitted development under Part 11 of the GPDO, but you must submit a prior-approval application covering method and restoration. Demolition of dwellinghouses always needs prior approval, even where permitted development applies.
What is a 'replacement dwelling' application?
Planning permission to demolish an existing dwelling and replace it with a new one. The principle is not automatic: councils assess the replacement against local policy on impact, scale, design and any heritage or rural-character considerations.
Can I get email alerts for new demolition applications in Welwyn Hatfield?
Yes. Click "Set up alerts" on this page and you'll get a daily or weekly email listing every new demolition application published by Welwyn Hatfield. You can also narrow the alert to a postcode, street, or drawn area.

We check Welwyn Hatfield's planning portal daily. New demolition applications appear here within a day of being published.