Council hub · East of England
Welwyn Hatfield planning applications
3,639 applications. 90% approved. 58 days to decide.
As of September 2026, PlanIndex holds 3,639 planning applications from Welwyn Hatfield. 725 were decided in the trailing 12 months, with 90% of clear-cut outcomes approved.
Welwyn Hatfield takes a median of 58 days to decide a planning application. See how that compares.
All applications
Newest first · page 1 of 73
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6/2026/1555/COND Awaiting decision
58 Bell Lane Brookmans Park AL9 7AY
Submission of details pursuant to condition number 5 (energy statement) on planning permission 6/2025/2133/FULL
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6/2026/1547/TC Awaiting decision
28 Parkfields Welwyn Garden City AL8 6ED
1 x Weeping Birch to reduce height by approx 1.5m and width
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6/2026/1538/TPO Awaiting decision
Chine House Wild Hill Hatfield AL9 6EB
Ground works and associated root pruning/ severance of T3 (Oak) and other trees not advised to be the subject of a TPO to facilitate installation of a root barrier 66m in length and 4m in depth TPO 580 (2016)
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6/2026/1533/ADV Awaiting decision
37-39 Bradmore Green Brookmans Park AL9 7QR
Remove old signage & replace with new
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6/2026/1531/TPO Withdrawn
37 The Ridgeway Cuffley EN6 4BB
T1 English Oak (Quercus robur) ref T316 fell to ground level
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6/2026/1526/HOUSE Awaiting decision
32 Turpins Chase Welwyn AL6 0RR
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
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6/2026/1527/COND Awaiting decision
Land at Hollybush Lane to the east of A1000 and north of Ascots Lane Welwyn Garden City AL7 4EG
Submission of details pursuant to condition numbers 1 (Construction Environmental Management Plan), 2 (Arboricultural Method Statement and Tree Protection Plan), 3 (Construction Method Statement - Phase 2 only) and 4 (Site Waste Management Plan) on planning permission 6/2025/1024/RM
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6/2026/1523/EMT Awaiting decision
5 Hitherway Welwyn Garden City AL8 7RG
4 x Whitebeams to fell. No replanting
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6/2026/1518/HOUSE Awaiting decision
48 Great Ganett Welwyn Garden City AL7 3DE
Erection of single storey rear extension
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6/2026/1507/TC Awaiting decision
10 Scholars Mews Welwyn Garden City AL8 7JQ
1 x Crab Apple to reduce by approx 1.2m height and width
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6/2026/1514/TPO Awaiting decision
6A Wendover Drive Welwyn AL6 9LT
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
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6/2026/1506/LAWP Awaiting decision
Gosmore Brocket Road Welwyn Garden City AL8 7TT
Erection of single storey side extensions x 2 and two storey rear extension
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6/2026/1502/HOUSE Awaiting decision
143 The Ryde Hatfield AL9 5DP
Erection of single storey rear extension with raising of roof to existing extension, and alterations to openings to rear and side elevations
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6/2026/1503/LAWE Awaiting decision
27 Batterdale Hatfield AL9 5JG
Certificate of lawfulness for the existing like-for-like replacement of damaged and aged windows on the front and rear elevations
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6/2026/1497/TC Awaiting decision
2 Valley Road Welwyn Garden City AL8 7DF
1 x Holly to reduce height by approximately 3m height 1 x Lawson cypress to reduce by approximately 2.5m in height. 1 x Plum to reduce height by approximately 3m Above 3 are domination side of the garden, they are thick dense and evergreen. Reducing to allow more light into garden and control the size 1 x Apple to reduce lateral branches over lawn area by approximately 2m to reduce lateral branches over lawn to maintain size of tree & provide more space and light to lawn area 1 x Ash to reduce lateral branches over lawn area by approximately 2m to reduce lateral branches as now crossing half the garden and blocking light
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6/2026/1499/EMT Awaiting decision
49 Knightsfield Welwyn Garden City AL8 7JE
1 x Irish Yew to remove in sections to ground level. Remove as tree is close to front room window and blocking the light. Tree owner is also elderly and wants to be able to see out of the window
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6/2026/1494/PN8 Awaiting decision
6 West View Hatfield AL10 0PJ
Prior approval for the erection of a single storey rear extension measuring 6m in depth, 3m in height and 3m to the eaves
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6/2026/1492/TC Awaiting decision
49 Knightsfield Welwyn Garden City AL8 7JE
1 x Irish Yew to remove in sections to ground level. Remove as tree is close to front room window and blocking the light
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6/2026/1496/LAWP Awaiting decision
6 West View Hatfield AL10 0PJ
Certificate of lawfulness for erection of single storey rear extension, side and rear extension, hip to gable loft conversion with rear dormer
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6/2026/1498/HOUSE Awaiting decision
6 West View Hatfield AL10 0PJ
Erection of part single part two-storey rear extension
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6/2026/1491/VAR Awaiting decision
Land at Great North Road Stanborough Welwyn Garden City AL8 7TQ
Variation of condition 28 (approved plans) on planning permission 6/2025/0764/FULL
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6/2026/1495/EMT Awaiting decision
2 Valley Road Welwyn Garden City AL8 7DF
1 x Holly to reduce height by approx 3m height 1 x Lawson Cypress to reduce by approx 2.5m in height 1 x Plum to reduce height by approx 3m 1 x Apple to reduce lateral branches by approx 2m to reduce lateral branches over lawn 1 x Ash to reduce lateral branches over lawn area by approx 2m
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6/2026/1489/LAWP Awaiting decision
23 The Ridgeway Potters Bar EN6 4BB
Certificate of lawfulness for the erection of an outhouse to accommodate gym facilities
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6/2026/1482/TC Awaiting decision
29 Sheepcote Welwyn Garden City AL7 4QA
Remove 40ft ash tree - The ash tree is showing signs of basal decay and structural defects from previous poor pruning, raising concerns over its long-term stability. Its raised roots are also damaging and lifting garden pathways, creating an ongoing maintenance and trip hazard. Continued pruning would require significant ongoing expenditure, therefore removal is considered appropriate on arboricultural, safety and practical grounds
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6/2026/1483/COND Awaiting decision
57 Tolmers Road Cuffley Potters Bar EN6 4JG
Submission of details pursuant to condition number 3 (Hard and Soft Landscaping) on planning permission 6/2026/0435/FULL
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6/2026/1485/EMT Awaiting decision
82 Attimore Road Welwyn Garden City AL8 6LP
Remove Ash tree stem to ground level - tree is in the way of fence/boundary line.
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6/2026/1488/EM Awaiting decision
9 Autumn Grove Welwyn Garden City AL7 4DB
Installation of 1 x Extreme uPVC french door set, Smooth White uPVC frames inside & out, Multipoint locking mechanism, Ultion High Security door cylinder, White hardware, Trickle Vents to comply and Clear Toughened safety glass
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6/2026/1481/TC Awaiting decision
82 Attimore Road Welwyn Garden City AL8 6LP
Remove Ash tree stem to ground level
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6/2026/1487/EM Awaiting decision
5 Ashley Close Welwyn Garden City AL8 7LH
Proposed addition of a 3104 x 5474 mm pent roofed wooden shed to rear garden
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6/2026/1476/HOUSE Awaiting decision
9 Barleycroft Green Welwyn Garden City AL8 6JY
Replacement of existing wooden garage with wooden shed
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6/2026/1477/HOUSE Awaiting decision
4 Brookmans Avenue Brookmans Park AL9 7QJ
Retention of single storey timber structure as gym and addition of storm porch
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6/2026/1479/HOUSE Awaiting decision
6 Marsden Road Welwyn Garden City AL8 6XZ
Erection of single storey side extension and part single, part two storey rear extension
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6/2026/1478/COND Awaiting decision
27 The Grove Brookmans Park AL9 7RL
Submission of details pursuant to Condition 1 (details of external render) and Condition 2 (details of windows and doors) on planning permission 6/2025/1617/HOUSE
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6/2026/1472/HOUSE Awaiting decision
16 Oak Road Woolmer Green SG3 6LS
Erection of part single, part two storey rear extension, new windows and doors to existing side and rear elevations and installation of rooflight within the rear roofslope
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6/2026/1473/COND Awaiting decision
38 The Grove Brookmans Park AL9 7RN
Submission of details pursuant to Condition 2 (boundary treatments) on planning permission 6/2025/0285/HOUSE
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6/2026/1474/FULL Awaiting decision
108 Tolmers Road Cuffley Potters Bar EN6 4JR
Proposed replacement dwelling
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6/2026/1470/TPO Awaiting decision
Glebe House Ellesfield Welwyn AL6 9HB
TPO 1016 1 x White Poplar to reduce upper canopy by approximately 10m height - Reduce upper canopy due to large volume of regrowth from historical reduction. Cavities and decay at old pruning wounds. Tree is close to neighbouring properties with a recent limb failure. 1 x White willow leaning over river to reduce by approximately 50% -tree is leaning heavily over river, reduction will prevent risk of failing. 1 x Goat willow to reduce by approximately 4m height and 3m width - tree is in decline, reduction is to stabilise upper canopy and allow retention of tree.
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6/2026/1471/FULL Awaiting decision
5 Branch Close Hatfield AL10 0TW
Garage conversion and extension to garage for use as annex
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6/2026/1460/EM Awaiting decision
14 Brockswood Lane Welwyn Garden City AL8 7BG
Fitting an air-to-air heat pump on a rear wall
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6/2026/1465/EMT Awaiting decision
6 Parkway Close Welwyn Garden City AL8 6HJ
1 x Hawthorn to reduce height to leave around 4-5m above ground level. To retain balance and minimise overhang to neighbours garden
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6/2026/1467/LB Awaiting decision
3 Holly Hall Court Church Street Welwyn AL6 9LH
Replacement like-for-like front door and one window
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6/2026/1458/FULL Awaiting decision
Tesco Heart Building Car Park Shire Park Welwyn Garden City AL7 1TW
Installation of one padel tennis court as an additional ancillary sporting and recreational facility to the Tesco office headquarters, together with associated floodlighting, and hard landscaping works.
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6/2026/1461/EM Awaiting decision
469 Howlands Welwyn Garden City AL7 4HP
Removal of front hedge on boundary of property and to replace existing block paving, with new block paving with better drainage
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6/2026/1459/HOUSE Awaiting decision
16 Oak Road Woolmer Green SG3 6LS
Erection of annexe
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6/2026/1466/HOUSE Awaiting decision
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 demolition of existing single storey rear extension and detached garage
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6/2026/1445/ADV Awaiting decision
Pavement Outside 37-40 Wigmores North Welwyn Garden City AL8 6PH
Installation of 2x advertisement panels on either side of Street Hub Unit
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6/2026/1455/COND Awaiting decision
5610 Gypsy Moth Avenue Hatfield Business Park Hatfield AL10 9BS
Submission of details pursuant to Condition 4 (Verification Report) on planning permission 6/2022/2759/FULL
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6/2026/1449/COND Awaiting decision
4 Brookmans Avenue Brookmans Park AL9 7QJ
Submission of details pursuant to Condition 4 (landscaping) on planning permission 6/2023/0622/FULL
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6/2026/1453/COND Awaiting decision
Monks Walk School Knightsfield Welwyn Garden City AL8 7NL
Submission of details pursuant to Condition 1 (Biodiversity Gain Plan), Condition 2 (Habitat Management and Monitoring Plan) and Condition 3 (Construction Environmental Management Plan) on planning permission 6/2026/0205/MAJ
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6/2026/1450/EM Awaiting decision
168 Blythway Welwyn Garden City AL7 1DU
Refurbishment and upgrade of existing rendered, gable wall, with the application of a ‘breathable’ top silicone coat for durability and longevity
Recent decisions
Data to September 2026
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6/2026/1198/HOUSE Granted
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, including, installation of new windows and doors and external rendering and cladding, following the demolition of garage and porch
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6/2026/1370/LAWP Granted
17-17A Mill Lane Welwyn AL6 9EU
Certificate of lawfulness for the change of use of offices to 3 x 2 bedroom flats
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6/2026/1257/HOUSE Granted
21 The Swallows Welwyn Garden City AL7 1BX
Garage conversion with alterations to openings to front and rear elevations
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6/2026/1531/TPO Withdrawn
37 The Ridgeway Cuffley EN6 4BB
T1 English Oak (Quercus robur) ref T316 fell to ground level
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6/2026/1218/LAWP Granted
43 Great Ley Welwyn Garden City AL7 4TJ
Certificate of lawfulness for rear dormer roof extension to form a loft conversion
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6/2026/1124/FULL Withdrawn
39 The Ridgeway Northaw EN6 4BD
Proposed construction of new house and garage following demolition of existing house and garage
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6/2026/1236/EMT Granted
30 Coneydale Welwyn Garden City AL8 7RZ
Reduction by 40% of Oak tree (T5) Reduction of the Holly hedge (T8) to 8 feet high
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6/2026/1202/HOUSE Granted
40 Cecil Crescent Hatfield AL10 0HG
Erection of single storey rear extension
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6/2026/1210/LAWE Refused
9 Flamingo Close Hatfield AL10 9LU
Certificate of lawfulness for the existing use of the property as a HMO (Use Class C4) in continuous use for over 10 years
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6/2026/1250/LAWP Granted
40 Dellsome Lane Welham Green Hatfield AL9 7ND
Certificate of lawfulness for Class A - Larger single storey rear extension (previously subject to prior approval application ref: 6/25/1851/PN8), Class B - Roof extension/hip to gable conversion, Class C - Other alterations to roof
The full record
Decisions between 2019 and 2026
PlanIndex holds 3,293 decisions from Welwyn Hatfield between 2019 and 2026, part of 3,639 applications on record. Over that period 87% of clear-cut outcomes were approvals, 2,723 granted against 391 refused. The busiest single year was 2021, with 992 applications recorded.
The trailing-year figures above track current activity. This record reaches back further, so a decision here may predate the online portal; each application still has its own page with the source link.
From the archive
Earliest records shown in full
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6/2019/2657/TC Withdrawn
69 Sweet Briar Welwyn Garden City AL7 3EB
Reduce 1 x Ash tree crown by 2m
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6/2019/2565/TC Granted
26 Guessens Road Welwyn Garden City AL8 6RA
Reduce 1x Fastigiate Pyrus tree (P1) by 30%
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6/2019/2836/COND Granted
Premier Inn Stanborough Road Welwyn Garden City AL8 6DQ
Submission of details pursuant to condition 5 (cycle parking) on planning permission 6/2018/1922/FULL
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6/2019/2637/LAWP Refused
63 Holloways Lane, Welham Green, Hatfield, AL9 7NU
Certificate of lawfulness for erection of rear dormer and installation of roof lights to facilitate loft conversion
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6/2019/2597/TPO Granted
17 Oaklands Rise Welwyn AL6 0RN
Reduce 1 x Oak (T1) crown by 20%
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6/2019/2802/TC Granted
47 Elmwood Welwyn Garden City AL8 6LD
Fell 1x Prunus Fructosa Globosa tree (T1)
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6/2019/2787/LAWE Refused
58 St Albans Road East Hatfield AL10 0EH
Certificate of lawfulness for the existing use of non-residential training centre (D1)
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6/2019/2588/COND Granted
2 New Road Welwyn Garden City AL8 7TX
Submission of details pursuant to condition 4 (remediation) on planning permission 6/2015/1984/FULL
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6/2019/2568/COND Granted
2 New Road Welwyn Garden City AL8 7TX
Submission of details pursuant to condition 4 (Site Characterisation, Submission and Implementation of Remediation Scheme, Unexpected Contamination and Monitoring and Maintenance) on planning permission 6/2015/1983/FULL
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6/2019/2673/TC Granted
27 Rooks Hill Welwyn Garden City AL8 6EU
Fell Line of Leyland Cypress Reduce 1 x Beech tree by 2m height & 1m width
Decision speed
12 months to September 2026, where both dates are published
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Within 8 weeks the statutory target for most applications 341 47%
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8 to 13 weeks the target band for major development 246 34%
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Over 13 weeks often extended by agreement 138 19%
Browse by ward
Applications by ward in Welwyn Hatfield
- Brookmans Park & Little Heath 264
- Haldens 85
- Handside 724
- Hatfield Cent. 131
- Hatfield East 143
- Hatfield South West 131
- Hatfield Villages 168
- Hollybush 94
- Howlands 198
- Northaw and Cuffley 331
- Panshanger 88
- Peartree 158
- Sherrards 388
- Welham Green & Hatfield South 150
- Welwyn East 255
- Welwyn West 284
Browse by postcode area
Applications by postcode district
Common questions
How many planning applications does Welwyn Hatfield decide?
In the 12 months to September 2026, Welwyn Hatfield decided 725 planning applications. 90% of clear-cut outcomes were approvals.
How long does a planning decision take in Welwyn Hatfield?
The median time from a planning application being received to a decision was 58 days over the 12 months to September 2026. Individual cases vary with complexity and consultation responses.
How many Welwyn Hatfield decisions arrive within the eight week target?
Of the 725 decisions in the 12 months to September 2026 where both dates are published, 47% came within eight weeks of the application being received, and 81% within thirteen weeks.
How many planning applications has Welwyn Hatfield decided in total?
PlanIndex holds 3293 decisions from Welwyn Hatfield between 2019 and 2026, out of 3,639 applications on record. Across that whole period 87% of clear-cut outcomes were approvals.
When is planning activity busiest in Welwyn Hatfield?
June 2026 was the busiest month across the 12 months to September 2026, with 168 applications recorded. The monthly pattern is listed on this page.
How do I find a planning application by its reference number?
Every application indexed here has its own page at a stable address. Look the reference up in a search engine together with the council name, or browse the latest applications below. Each page shows the description, address, dates and decision as the council published them.
Where can I see the full documents for an application?
Plans, drawings and officer reports stay on Welwyn Hatfield's own planning portal. Every application page here links straight to the source record.
Cite these figures
Click the text to select the whole citation.
Welwyn Hatfield: 3,639 planning applications on record as of September 2026. Trailing 12 months: 725 decided, 90% approved, median 58 days to a decision. 1,014 new applications received in the same period. Decisions on record run between 2019 and 2026: 3,293 in total, 87% approved. Source: PlanIndex, planindex.co.uk.