Planning applications in Welwyn Hatfield
73 Mymms Drive Brookmans Park AL9 7AA
Erection of a new dwelling following demolition of the existing building
6 Handside Green Welwyn Garden City AL8 6SQ
Erection of part single part double storey rear and side extension to dwelling with fenestration alterations following the demolition and rebuild of g...
6 Handside Green Welwyn Garden City AL8 6SQ
Erection of part single part double storey rear and side extension, fenestration alterations and erection of garage following demolition of existing g...
60 Westland Drive Brookmans Park AL9 7UQ
Erection of single storey rear extension, hip to gable loft conversion and insertion of rear box dormer and alterations to fenestration, following the...
7 Welwyn Hall Gardens Welwyn AL6 9LF
Erection of a detached outbuilding in the rear garden following the demolition of the existing outbuilding
187 Blythway Welwyn Garden City AL7 1DS
Erection of home office/gym following the demolition of existing shed outbuildings
Red Lodge High Road Essendon Hatfield AL9 6HU
Certificate of Lawfulness for two single storey side extensions, replacement car port following removal of existing structures, new hardstanding and v...
23 The Ridgeway Cuffley Potters Bar EN6 4BB
Erection of a part double storey front extension - part double storey rear extension with inset balconies - 0.8m increase in ridge height and installa...
96 Birchwood Avenue Hatfield AL10 0PS
Erection of a part single-storey, part two storey side extension and a single storey rear extension, including associated internal reconfiguration, re...
32 Yew Grove Welwyn Garden City AL7 2HY
Erection of a single storey rear extension, following demolition of existing extension
18 Worcester Road Hatfield AL10 0DX
Erection of single storey rear extension and front lean to porch following the demolition of rear conservatory
11 Wheatbarn Welwyn Garden City AL7 2BN
Erection of a single storey rear extension following the demolition of conservatory
159 Handside Lane Welwyn Garden City AL8 6TA
Erection of part single and part two storey rear extension, following demolition of conservatory with alterations to side & rear openings
6 Densley Close Welwyn Garden City AL8 7JX
Erection of part two storey, part single storey side extension and formation of new parking space & crossover, following demolition of existing single...
159 Handside Lane Welwyn Garden City AL8 6TA
Erection of part single and part two storey rear extension, following demolition of conservatory with alterations to side and rear openings
Land West of Woolmer’s Park The Hay Barn (Howell Court Farm) Essendon AL9 5RL
Demolition of existing agricultural barn and erection of a replacement self-build dwellinghouse with associated access, parking, landscaping, installa...
Land at Spinney Lane Rabley Heath Welwyn AL6 0QS
Cessation of existing commercial use and erection of 5 dwellings
The Willows Marshmoor Lane Welham Green Hatfield AL9 7HT
Extension of existing residential dwelling, along with the demolition and re-construction of existing carport and store
56 Warren Way Digswell Welwyn AL6 0DN
Erection of a single storey rear extension following the demolition of existing conservatory
57 Tolmers Road Cuffley Potters Bar EN6 4JG
Erection of dwelling following the demolition of existing dwelling
6 South Mundells Welwyn Garden City AL7 1EP
Prior approval for demolition to remove the existing small industrial building and allow the site to be levelled and resurfaced in tarmac, creating a ...
93 Holloways Lane Welham Green Hatfield AL9 7NU
Erection of single storey rear extension following demolition of existing detached garage
187 Blythway Welwyn Garden City AL7 1DS
Erection of outbuilding for home office/ gym following demolition of existing shed/outbuilding
116 Harmer Green Lane Digswell Welwyn AL6 0ET
Replacement roof of existing garage/outbuilding, incorporating skylights along with other internal and external alterations following partial demoliti...
15 Guessens Road Welwyn Garden City AL8 6QL
Erection of two storey rear extension, single storey side and rear extensions following demolition of existing garage, insertion of rooflights and ins...
40 Brookside Crescent Cuffley Potters Bar EN6 4QN
Erection of two-storey front, side and rear extensions and alterations to the roof, including a crown roof to the rear, following partial demolition o...
Brocket Park Warren Farm Marford Road Lemsford Welwyn Garden City AL8 7XG
Erection of single storey extension to the dairy, single storey extension to adjacent outbuilding and associated fenestration changes to facilitate gy...
6 South Mundells Welwyn Garden City AL7 1EP
Prior approval for demolition to remove the existing small industrial building and allow the site to be levelled and resurfaced in tarmac
8 Lemsford Road Hatfield AL10 0DH
Prior approval for the erection of a single storey rear extension measuring 6m in depth, 3.07m in height and 2.46m to the eaves following the demoliti...
2 Handside Lane Welwyn Garden City AL8 6SF
Erection of single storey rear extension following demolition of conservatory, garage conversion with raising of roof, loft conversion with dormers an...
Tylersley Farm Tylers Causeway Newgate Street Hertford SG13 8QN
Erection of two dwellings together with car parking and landscaping following the demolition of existing bungalow
14 Birkin Court Welwyn Garden City AL7 3FA
Erection of a first floor rear extension over existing terrace, ground floor rear extension and partial garage conversion
8 Lemsford Road Hatfield AL10 0DH
Prior approval for the erection of a single storey rear extension measuring 6m in depth, 3.07m in height and 2.46m to the eaves following the demoliti...
6 Densley Close Welwyn Garden City AL8 7JX
Erection of part two storey, part single storey side extension and formation of new parking space & crossover, following demolition of existing single...
20 Turmore Dale Welwyn Garden City AL8 6HS
Part conversion of existing garage, front infill extension and alterations to fenestration
4 Bulls Lane Hatfield AL9 7PD
Erection of a two storey side extension and single storey front extension following the demolition of the existing garage, single storey side extensio...
83 Brookmans Avenue Brookmans Park AL9 7QG
Erection of a self build two and half storey detached dwelling and front boundary wall and vehicular gates following the demolition of the existing dw...
47 Dixons Hill Close Welham Green Hatfield AL9 7EF
Erection of single storey rear and side extensions following the demolition of the existing detached sheds and attached W.C
47 Dixons Hill Close Welham Green Hatfield AL9 7EF
Erection of single storey rear and side extensions following the demolition of the existing detached sheds and attached W.C
Rose Cottage Kentish Lane Hatfield AL9 6JP
Replacement of an outbuilding (retrospective)
BioPark Broadwater Road Welwyn Garden City AL7 3AX
Demolition of existing buildings and construction of residential units (Use Class C3) and community hub (Use Class E/F.2), with public realm and open ...
Bell Bar Service Station Great North Road Hatfield AL9 6DA
Reconfiguration of the site to include the erection of an extension to the existing sales building, demolition of existing bungalow, 2no. new proposed...
8 Mannicotts Welwyn Garden City AL8 7BW
Erection of a single storey rear extension, first floor rear extension, removal of existing roof and replacement roof with loft and crown roof. New do...
10 Lowlands Hatfield AL9 5DY
Erection of single storey rear extension with mono pitch roof and rooflights and brick infill of existing front porch following the demolition of exis...
1 Mannicotts Welwyn Garden City AL8 7BW
Erection of a part single and part two storey rear extension, single storey side extensions on eitherside of the dwelling and erection of a detached g...
2 Breakmead Welwyn Garden City AL7 3HG
Erection of a single storey rear extension, loft conversion with dormer and demolition of shed
32 The Holdings Hatfield AL9 5HQ
Erection of a two-storey extension to the southern side of the dwelling and the erection of a single-storey extension to the northern side of the dwel...
12 The Valley Green Welwyn Garden City AL8 7DQ
Erection of a single storey rear extension following the demolition of the existing conservatory
200 Heronswood Road Welwyn Garden City AL7 3JQ
Erection of a single storey side and rear extension following the demolition of the existing garden store and covered passage
22 Endymion Road Hatfield AL10 8AS
Certificate of lawfulness for a hip to gable loft conversion with rear box dormer, insertion of skylights to front roof slope and demolition of second...
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Data updated 10 May 2026. Source: Welwyn Hatfield planning portal.