Planning Applications in Welwyn, Hertfordshire

Planning authority: Welwyn Hatfield Borough Council

Search current and historic planning applications in Welwyn, Hertfordshire, published by Welwyn Hatfield Borough Council - 36 in the last 90 days. Explore them on the map, apply detailed filters, or receive free alerts for new proposals.

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Showing 36 of 36 applications
6/2026/1271/TPO 20 Jul 2026 Pending

33 Oaklands Rise Welwyn AL6 0RN

TPO 673 Removal of dead hornbeam tree

Welwyn Hatfield 20 Jul 2026
6/2026/1229/TPO 13 Jul 2026 Pending

2 Bracken Lane Welwyn AL6 0RB

Remove 1 x Oak. (covered by TPO 753 (2018))

Welwyn Hatfield 13 Jul 2026
6/2026/1198/HOUSE 10 Jul 2026 Pending

9 Mardley Hill Welwyn AL6 0UE

Erection of single storey front, side and rear extension, raising the existing roof and formation of rear dormer. Alterations to the fenestration, inc...

Welwyn Hatfield 10 Jul 2026
6/2026/1200/HOUSE 10 Jul 2026 Pending

98 Harmer Green Lane Digswell Welwyn AL6 0ES

Formation of front boundary gate with brick piers and erection of rear extension, rear orangery, side porch canopy, replacement front porch, alteratio...

Welwyn Hatfield 10 Jul 2026
6/2026/1205/TPO 10 Jul 2026 Pending

12 Mardley Hill Welwyn AL6 0TN

TPO 24 T2 - 1 x Oak to remove in sections to ground level. Tree is suppressed by neighbouring tree leaving a high canopy, blocking lights to neighbour...

Welwyn Hatfield 10 Jul 2026
6/2026/1182/TPO 7 Jul 2026 Pending

18 Great North Road Welwyn AL6 0PS

T1 - Sweet Chestnut tree - Fell one dead sweet Chestnut tree to ground level

Welwyn Hatfield 7 Jul 2026
6/2026/1121/HOUSE 29 Jun 2026 Pending

45 New Road Digswell Welwyn AL6 0AQ

Garage conversion to habitable area, front extension within existing garage roof overhang, installation of rooflights and alterations to fenestration

Welwyn Hatfield 29 Jun 2026
6/2026/1108/TPO 26 Jun 2026 Pending

16 Mardley Hill Welwyn AL6 0TN

T1 - 1 x Oak to reduce by approximately 2m height and width, ensuring to cut back clearing the house sufficiently. Oak reducing due to canopy in close...

Welwyn Hatfield 26 Jun 2026
6/2026/1099/HOUSE 25 Jun 2026 Pending

10 Windsor Close Welwyn AL6 9JZ

Erection of a single storey front extension with alterations to fenestration following the demolition of existing front porch

Welwyn Hatfield 25 Jun 2026
6/2026/1094/HOUSE 24 Jun 2026 Pending

89 Warren Way Digswell Welwyn AL6 0DL

Erection of single storey side/rear extension, new front porch/level access, new garage, new side window, widening of driveway and accessible ramp dow...

Welwyn Hatfield 24 Jun 2026
6/2026/1095/TPO 24 Jun 2026 Pending

31 Parkside Welwyn AL6 9DQ

T1 Goat Willow Pollard back to previous trimming points which is approx 3-4m off T2 Cedar Crown reduction by 2-3m approx back to previous pruning poin...

Welwyn Hatfield 24 Jun 2026
6/2026/1067/FULL 19 Jun 2026 Pending

The North Star 82 Great North Road Welwyn AL6 0TA

Use of an existing flat roof as a first-floor teaching terrace and installation of an external fire escape staircase

Welwyn Hatfield 19 Jun 2026
6/2026/1063/TC 18 Jun 2026 Approved

The Coach House Ellesfield Welwyn AL6 9HB

Reduce 1 x Horse chestnut by 2m. Cut back 1 x Sycamore to 1m beyond boundary line.

Welwyn Hatfield 18 Jun 2026
6/2026/1056/TC 17 Jun 2026 Approved

16 The Green Welwyn AL6 9EA

Fell 1 x weeping willow.

Welwyn Hatfield 17 Jun 2026
6/2026/1049/TC 16 Jun 2026 Withdrawn

41 High Street Welwyn AL6 9EF

Birch tree in corner of boundary next to residential homes, reduction in size by 30% to the overall size of the tree

Welwyn Hatfield 16 Jun 2026
6/2026/1036/LAWE 15 Jun 2026 Withdrawn

25 Bluebells Welwyn AL6 0XD

Certificate of Lawfulness for the erection of a first floor external balcony to the rear of the house

Welwyn Hatfield 15 Jun 2026
6/2026/1037/TC 15 Jun 2026 Approved

6 Hobbs Hill Welwyn AL6 9DS

Fell birch.

Welwyn Hatfield 15 Jun 2026
6/2026/1033/MAJ 12 Jun 2026 Pending

Sandyhurst 1 Welwyn By Pass Road Welwyn AL6 9HT

Erection of a 66 bedroom care home for the elderly (Use Class C2) with associated access, parking, landscaping and ancillary buildings following demol...

Welwyn Hatfield 12 Jun 2026
6/2026/0991/FULL 5 Jun 2026 Pending

1 Hollybush Close Welwyn AL6 0PZ

Erection of single detached 3 bedroom dwelling to the North East of the original dwelling

Welwyn Hatfield 5 Jun 2026
6/2026/0974/TPO 3 Jun 2026 Pending

2 Woodacre Drive Welwyn AL6 0UA

T1 Oak Prune western aspect by 2 metres. (Covered by TPO24 A3 and TPO 642 (2017) G1)

Welwyn Hatfield 3 Jun 2026
6/2026/0953/TPO 1 Jun 2026 Pending

14 Birch Grove Welwyn AL6 0QP

T1-T10 Hornbeam - repollard back to previous pollard points roughly 3m cut back to main trunk. T11-T15 Hornbeam - 1.5m boundary cut back of all branch...

Welwyn Hatfield 1 Jun 2026
6/2026/0943/HOUSE 29 May 2026 Pending

69 Robbery Bottom Lane Welwyn AL6 0UL

Raising the existing roof line incorporating new rooflights, new dormer, external alterations to existing windows and doors and the creation of a new ...

Welwyn Hatfield 29 May 2026
6/2026/0908/COND 21 May 2026 Pending

59 New Road Digswell Welwyn AL6 0AL

Submission of details pursuant to Condition 14 (sustainable drainage scheme), 15 (verification report) and 16 (details of all units) on planning permi...

Welwyn Hatfield 21 May 2026
6/2026/0893/HOUSE 20 May 2026 Approved

Windy Ridge 40 Great North Road Welwyn AL6 0PX

Erection of two storey front extension with dormers, alteration to openings

Welwyn Hatfield 20 May 2026
6/2026/0850/TPO 14 May 2026 Approved

4 Mornington Digswell Welwyn AL6 0AJ

TG1 Tree Group overhanging road and footpath - Lift crowns overhanging road and foot path to 5 metres in height to allow clearance from road users and...

Welwyn Hatfield 14 May 2026
6/2026/0825/TPO 12 May 2026 Approved

Brambles Briary Wood End Welwyn AL6 0TD

TPO 800 T1 - Chestnut tree - crown reduce by approx 4-5m - tree is multi stem and we have recently removed the whole crown on one stem due to being co...

Welwyn Hatfield 12 May 2026
6/2026/0815/HOUSE 11 May 2026 Approved

111 Warren Way Digswell Welwyn AL6 0DL

Erection of part single storey, part two storey rear extension with rooflight to ground floor roof, enlarged patio area and ground floor and first flo...

Welwyn Hatfield 11 May 2026
6/2026/0800/COND 7 May 2026 Refused

36A Reynards Road Welwyn AL6 9TP

Submission of details pursuant to condition 1 (Construction Management Plan), condition 2 (Surface Water Drainage) and condition 3 (Material Samples),...

Welwyn Hatfield 7 May 2026
6/2026/0788/HOUSE 6 May 2026 Approved

40 Reynards Road Welwyn AL6 9TP

Demolition of an existing derelict outbuilding and its replacement with single-storey accommodation ancillary to the main dwelling

Welwyn Hatfield 6 May 2026
6/2026/0802/TPO 6 May 2026 Approved

5 Pine Crest Welwyn AL6 0EQ

T1 Oak: 30% reduction to suitable lateral growth points. T2 & T3 Sweet chestnuts: 30% reduction to suitable lateral growth points. (Covered by TPO655)

Welwyn Hatfield 6 May 2026
6/2026/0780/TPO 5 May 2026 Approved

8 Oak Piece Welwyn AL6 0XE

Sweet Chestnut tree: under TPO 534, marked as T2 Remove Tree as it's technically dead (assessed by Ashley Grey of Ashley Trees)

Welwyn Hatfield 5 May 2026
6/2026/0782/HOUSE 5 May 2026 Approved

11 Carleton Rise Welwyn AL6 9RP

Installation of a front portico

Welwyn Hatfield 5 May 2026
6/2026/0773/TC 1 May 2026 Approved

44 Mill Lane Welwyn AL6 9ET

TG1 Sycamore, Prunus and Hazel - Coppice/pollard the Sycamore and Hazel to the height of the Laurel hedge and bring the height of the dead/Ivy-clad pa...

Welwyn Hatfield 1 May 2026
6/2026/0764/COND 30 Apr 2026 Approved

45 High Street Welwyn AL6 9EH

Submission of details pursuant to condition 1 (method) and 2 (structural survey and a detailed schedule of repair works) on listed building consent 6/...

Welwyn Hatfield 30 Apr 2026
6/2026/0726/HOUSE 24 Apr 2026 Approved

9 Lanercost Close Welwyn AL6 0RW

Erection of a single-storey rear extension with lantern rooflight; erection of a timber pergola on raised patio; replacement of existing windows and d...

Welwyn Hatfield 24 Apr 2026
6/2026/0714/COND 22 Apr 2026 Approved

9 Wendover Lodge Church Street Welwyn AL6 9LR

Submission of details pursuant to Condition 4 (Archaeological post investigation assessment) and 11 (Energy assessment) on planning permission 6/2024/...

Welwyn Hatfield 22 Apr 2026
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Data updated daily. Source: Welwyn Hatfield Borough Council planning portal.