Skip to content

Planning applications in AL6

We hold 915 planning applications for the AL6 postcode area, 210 of them submitted in the past year. 84% of decided applications here were approved. A decision typically takes 56 days. The area is covered by Welwyn Hatfield, North Hertfordshire, East Hertfordshire.

915
applications held
210
in the past year
84%
approved
56 days
median decision

Councils covering AL6

Welwyn Hatfield (823)North Hertfordshire (53)East Hertfordshire (38)St Albans (1)

Recent applications in AL6

Pending
23 Sept 202626/02288/FP
Welwyn Equestrian Centre Pottersheath Road Pottersheath Hitchin Hertfordshire AL6 9SZNorth Hertfordshire

Part demolition and alterations to existing barn and stables, including alterations to fenestration, replacement roofs, and insertion of front roof lights to facilitate conversion to form a single dwelling with associated residential garden and parking area.

Pending
16 Sept 20263/26/1315/NMA
12 East Riding Tewin Wood Tewin Hertfordshire AL6 0PAEast Hertfordshire

Non-material amendment to 3/26/0321/HH, removal of roof parapets

Pending
APPROVAL OF DETAILS RESERVED BY CONDITION
16 Sept 20266/2026/1611/COND
The North Star 82 Great North Road Welwyn AL6 0TAWelwyn Hatfield

Submission of details pursuant of conditions 5 (noise), 6 (EV charging points), 7 (cycle storage), 10 (travel plan statement on planning permission 6/2026/0025/VAR

Pending
HOUSEHOLDER APPLICATION
9 Sept 20266/2026/1570/HOUSE
16 Mardley Avenue Welwyn AL6 0UDWelwyn Hatfield

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

Pending
APPROVAL OF DETAILS RESERVED BY CONDITION
4 Sept 20266/2026/1545/COND
38 New Road Digswell Welwyn AL6 0AHWelwyn Hatfield

Submission of details pursuant to Condition 1 (Construction Traffic Management Plan) on planning permission 6/2023/2483/FULL

Permitted
HOUSEHOLDER APPLICATION
1 Sept 20266/2026/1526/HOUSE
32 Turpins Chase Welwyn AL6 0RRWelwyn Hatfield

Erection of a single storey side extension and a new garage on ground floor level, conversion of the existing garage and installation of an air source heat pump

Pending
1 Sept 202626/01924/FP
Former Big Cat Sanctuary Codicote Road Welwyn Hertfordshire AL6 9TUNorth Hertfordshire

Erection of 109 residential dwellings with access, parking, hard and soft landscaping and public open space following demolition of all existing buildings and structures

Permitted
28 Aug 202626/02183/NMA
8 The Stables Pottersheath Welwyn Hertfordshire AL6 9GRNorth Hertfordshire

Widen first floor (obscured) window on the SW elevation (as Non-Material Amendment to planning permission 26/00036/FPH granted 27/02/2026)

Permitted
WORKS TO TREES WITH TREE PRESERVATION ORDER
27 Aug 20266/2026/1514/TPO
6A Wendover Drive Welwyn AL6 9LTWelwyn Hatfield

T1 1 x Beech to remove in sections to ground level - Tree is almost dead and in poor condition T2 1 x Beech to reduce to clear property by 1.5m - Branches rubbing on property

Pending
20 Aug 20263/26/1113/FUL
Seven Pines Margery Lane Tewin Hertfordshire AL6 0JPEast Hertfordshire

Demolition of bungalow and construction of two dwellings with air source heat pump, EV charging point, cycle and bin store

Permitted
FULL PERMISSION
19 Aug 20266/2026/1431/FULL
Lodge Farm 124 Harmer Green Lane Digswell Welwyn AL6 0ETWelwyn Hatfield

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

Permitted
WORKS TO TREES WITH TREE PRESERVATION ORDER
18 Aug 20266/2026/1440/TPO
10 Mardley Heights Welwyn AL6 0TXWelwyn Hatfield

4 x English Oak (Quercus robur), identified as T1, T2, T3 and T4 on the accompanying sketch plan, protected under TPO 641 (2017). Proposed works: Crown reduction of up to 20%; crown thinning of up to 20%; crown lift to approximately 3–4m; removal of epicormic trunkal growth; selective pruning to provide approximately 2m clearance from the dwelling and approximately 1m clearance from overhead lines. Reason for works: Continued periodic arboricultural management of this established group of Oaks, maintaining appropriate clearance from the dwelling and overhead services whilst retaining a balanced, natural canopy and the amenity value of the trees.

Pending
FULL PERMISSION
17 Aug 20266/2026/1441/FULL
22 The Avenue Welwyn AL6 0PPWelwyn Hatfield

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 infrastructure and landscape works following the demolition of the existing dwelling and separate detached building

Permitted
WORKS TO TREES WITH TREE PRESERVATION ORDER
14 Aug 20266/2026/1432/TPO
1 Oaklands View Welwyn AL6 0RJWelwyn Hatfield

TPO 203 & 879 - T1- Sweet chestnut tree to reduce all round by 2-3 metres for maintenance and light T2- Blue Atlantic Cedar tree- to cut back by 2-3 metres from the neighbours house and balance the crown for maintenance and light T3-Blue Atlantic Cedar tree to reduce all round by 2 metres for maintenance and light

Refused
FULL PERMISSION
14 Aug 20266/2026/1436/FULL
8 Robbery Bottom Lane Welwyn AL6 0UWWelwyn Hatfield

Erection of two 2-bed chalet bungalows (Use Class C3) following the subdivision of existing residential plot

Pending
WORKS TO TREES WITH TREE PRESERVATION ORDER
13 Aug 20266/2026/1422/TPO
8 Bluebells Welwyn AL6 0XDWelwyn Hatfield

TPO 639 (2017) - Trim two Hornbeam Trees by 25 to 30%

Pending
Small
WORKS TO TREES WITH TREE PRESERVATION ORDER
6 Aug 20266/2026/1393/TPO
10 Bluebells Welwyn AL6 0XDWelwyn Hatfield

T1 & T2 Hornbeam reduce back to previous pruning points 25% or approximately 2.5m (TPO 639 2017)

Pending
HOUSEHOLDER APPLICATION
4 Aug 20266/2026/1376/HOUSE
18 Briary Wood Lane Welwyn AL6 0TFWelwyn Hatfield

Erection of a single storey ground floor extension & part two storey rear, raising the roof and alterations to facilitate loft conversion to include new crown roof with front & rear dormers

Undecided
Small
Full Permission Householder
29 Jul 202626/01892/FPH
Briar Cottage Pottersheath Road Pottersheath Welwyn Hertfordshire AL6 9SUNorth Hertfordshire

Two-storey side/rear extension and insertion of first floor side window following demolition of existing shed and oil tank.

Pending
Small
WORKS TO TREES WITH TREE PRESERVATION ORDER
27 Jul 20266/2026/1305/TPO
20 Mardley Avenue Welwyn AL6 0UDWelwyn Hatfield

Up to a 2m reduction to Cherry tree, to maintain its healthy station and prevent over extension, from growing too large. Fell, process and remove Yew tree as resident has concerns that if it was to uproot or fail it would hit the house due to its location (covered by TPO 24 A3)

Pending
23 Jul 20263/26/1030/VAR
19 Firs Walk Tewin Wood Tewin Hertfordshire AL6 0NYEast Hertfordshire

Variation of Conditions 2 (approved plans), 4 (Landscape and Ecological Management Plan), 5 (Sustainability of Construction) and 10 (Landscape design proposals) pursuant to planning permission (ref: 3/22/0312/FUL) for (Demolition and replacement of dwelling with associated parking and landscaping): Alterations from approved plans - alterations to Ecology Plan relating to bee bricks, inclusion of a chimney, alterations to landscaping (retrospective).

Pending
Small
App for Non-Material Amendments
21 Jul 20263/26/1021/NMA
12 Desborough Drive Tewin Wood Tewin Hertfordshire AL6 0HJEast Hertfordshire

Non-material amendment to 3/25/1431/HH, changes to fenestration

Pending
Small
WORKS TO TREES WITH TREE PRESERVATION ORDER
20 Jul 20266/2026/1271/TPO
33 Oaklands Rise Welwyn AL6 0RNWelwyn Hatfield

Removal of dead hornbeam tree. (covered by TPO 673 (2017))

Permitted
Small
WORKS TO TREES WITH TREE PRESERVATION ORDER
13 Jul 20266/2026/1229/TPO
2 Bracken Lane Welwyn AL6 0RBWelwyn Hatfield

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

Pending
13 Jul 20263/26/0823/FUL
44 Orchard Road Tewin Hertfordshire AL6 0HNEast Hertfordshire

Demolition of existing house and erection of detached two-storey dwelling with solar panels, air-source heat pump, new driveway, cycle store and bin store

Pending
HOUSEHOLDER APPLICATION
10 Jul 20266/2026/1198/HOUSE
9 Mardley Hill Welwyn AL6 0UEWelwyn Hatfield

Erection of single storey front, side and rear extension, raising the existing roof and formation of rear dormer. Alterations to the fenestration, including, installation of new windows and doors and external rendering and cladding, following the demolition of garage and porch

Pending
Small
WORKS TO TREES WITH TREE PRESERVATION ORDER
10 Jul 20266/2026/1205/TPO
12 Mardley Hill Welwyn AL6 0TNWelwyn Hatfield

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 neighbouring gardens as part of a larger group **a reduction doesnt seem suitable due to the existing canopy shape. Reducing the tree significantly will create a denser thicker poorly attached growth. Client happy to replant T3 - 1 x Beech tree to reduce overhanging lateral branches by approximately 2m. Reduce lateral overhang to no 16 as tree is too close to boundary and excessive overhang is leaving bird poo on kids play equipment

Permitted
Small
Lawful Development Certificate Proposed
8 Jul 202626/01621/LDCP
21 Danesbury Park Road Welwyn Hertfordshire AL6 9SHNorth Hertfordshire

Two storey rear extension following removal of existing single storey rear elements

Permitted
Small
WORKS TO TREES WITH TREE PRESERVATION ORDER
7 Jul 20266/2026/1182/TPO
18 Great North Road Welwyn AL6 0PSWelwyn Hatfield

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

Permitted
Small
WORKS TO TREES WITH TREE PRESERVATION ORDER
26 Jun 20266/2026/1108/TPO
16 Mardley Hill Welwyn AL6 0TNWelwyn Hatfield

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 proximity to property and roof. (Covered by TPO 24 A3)

Pending
FULL PERMISSION
19 Jun 20266/2026/1067/FULL
The North Star 82 Great North Road Welwyn AL6 0TAWelwyn Hatfield

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

Pending
Small
TREES IN CONSERVATION AREA
18 Jun 20266/2026/1063/TC
The Coach House Ellesfield Welwyn AL6 9HBWelwyn Hatfield

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

Pending
Small
TREES IN CONSERVATION AREA
17 Jun 20266/2026/1056/TC
16 The Green Welwyn AL6 9EAWelwyn Hatfield

Remove 1 x Weeping willow

Permitted
17 Jun 20263/26/0875/HH
Caverswall Queen Hoo Lane Tewin Hertfordshire AL6 0LTEast Hertfordshire

Demolition of single storey rear extension with roof terrace, erection of single storey rear extension with roof terrace and glass balustrades, new ground and first floor front windows with glass balustrade added to existing flat roof

Withdrawn
LAWFUL DEVELOPMENT - EXISTING
15 Jun 20266/2026/1036/LAWE
25 Bluebells Welwyn AL6 0XDWelwyn Hatfield

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

Refused
Small
FULL PERMISSION
5 Jun 20266/2026/0991/FULL
1 Hollybush Close Welwyn AL6 0PZWelwyn Hatfield

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

Pending
Medium
Full Planning Permission
5 Jun 202626/00705/FP
Connor Gardens Danesbury Park Road Welwyn Hertfordshire AL6 9SNNorth Hertfordshire

Change of use of land to residential static caravans/park homes to include footpath extension, parking, improved access points and associated landscaping (including changing the levels of part of the quarry area) and infrastructure.

Refused
Small
WORKS TO TREES WITH TREE PRESERVATION ORDER
3 Jun 20266/2026/0974/TPO
2 Woodacre Drive Welwyn AL6 0UAWelwyn Hatfield

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

Pending
Small
WORKS TO TREES WITH TREE PRESERVATION ORDER
1 Jun 20266/2026/0953/TPO
14 Birch Grove Welwyn AL6 0QPWelwyn Hatfield

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 branches overhanging rear boundary.

Permitted
HOUSEHOLDER APPLICATION
29 May 20266/2026/0943/HOUSE
69 Robbery Bottom Lane Welwyn AL6 0ULWelwyn Hatfield

Raising the existing roof line incorporating new rooflights, new dormer, external alterations to existing windows and doors and the creation of a new parking space, erection of canopy following demolition of existing porch

Permitted
HOUSEHOLDER APPLICATION
20 May 20266/2026/0893/HOUSE
Windy Ridge 40 Great North Road Welwyn AL6 0PXWelwyn Hatfield

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

Pending
Small
Full Permission Householder
12 May 202626/00639/FPH
Chapel Barn Rabley Heath Road Codicote Welwyn Hertfordshire AL6 9UANorth Hertfordshire

Erection of detached ancillary garden annex with decking and associated access steps

Permitted
Small
WORKS TO TREES WITH TREE PRESERVATION ORDER
12 May 20266/2026/0825/TPO
Brambles Briary Wood End Welwyn AL6 0TDWelwyn Hatfield

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 completely dead. Client is worried about the balancing weight now on the other stem. Please see attached photos.

Conditions
Small
Full Permission Householder
11 May 202626/01202/FPH
Southernwood Pottersheath Road Pottersheath Welwyn Hertfordshire AL6 9STNorth Hertfordshire

Single storey rear extension, alterations to fenestrations including insertion of rear first floor Juliet balcony and external cladding

Permitted
Small
WORKS TO TREES WITH TREE PRESERVATION ORDER
6 May 20266/2026/0802/TPO
5 Pine Crest Welwyn AL6 0EQWelwyn Hatfield

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

Pending
HOUSEHOLDER APPLICATION
5 May 20266/2026/0782/HOUSE
11 Carleton Rise Welwyn AL6 9RPWelwyn Hatfield

Installation of a front portico

Permitted
Small
WORKS TO TREES WITH TREE PRESERVATION ORDER
5 May 20266/2026/0780/TPO
8 Oak Piece Welwyn AL6 0XEWelwyn Hatfield

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

Refused
Small
Lawful Development Certificate Proposed
5 May 202626/01038/LDCP
21 Danesbury Park Road Welwyn Hertfordshire AL6 9SHNorth Hertfordshire

Two storey rear extension following demolition of existing rear elements.

Permitted
Small
Permission in Principle
30 Apr 202626/01131/PIP
Land At The Rear Of 25 Danesbury Park Road Welwyn Hertfordshire AL6 9SHNorth Hertfordshire

Erection of up to 2 dwellings and associated infrastructure

Permitted
ESTATE MANAGEMENT
27 Apr 20266/2026/0744/EM
1 Old Forge Close Welwyn AL6 0SRWelwyn Hatfield

Proposed removal of redundant boiler chimney at rear of property