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Planning Application: 6/2026/1570/HOUSE




HOUSEHOLDER APPLICATION
Under Consultation
Mrs Sarah Madyausiku
s.madyausiku@welhat.gov.uk
16 Mardley Avenue Welwyn AL6 0UD
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
525029
217882

  • Welwyn East

  • Councillor Julie Cragg
  • Councillor Claire Hunt
  • Councillor Durk Reyner
Welwyn
100080989426
09/09/2026
09/09/2026
07/10/2026
Mr Amir Arsalan Tahouni
Mr Mehdi Jalali Roudsari
Flat 4 33 Mowbray Road London NW6 7QS
16 Mardley Avenue Welwyn Hertfordshire AL6 0UD
Description Distance
Parish 0.00
Great Crested Newts DLL Risk Zones 0.00
Delegated

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File Description Date Uploaded
Application Form - Without Personal Information
File: ApplicationFormRedacted.pdf (279 kb) Description: Applicationformredacted Created Date: 09/09/2026
Block Plan
File: 16mrd-atg-02-sp-dr-a- 260822 -p- 01.sp - proposed site plan.pdf (249 kb) Description: Proposed Site Plan Created Date: 09/09/2026
Elevations
File: 16mrd-atg-02-zz-dr-a- 260828 - proposed architectural drawings_Part3.pdf (268 kb) Description: Proposed Architectural Elevations Created Date: 09/09/2026
File: 16mrd-atg-01-zz-dr-a- 260822 - approved architectural drawings_Part3.pdf (223 kb) Description: Approved Architectural Elevations Created Date: 09/09/2026
File: 16mrd-atg-00-zz-dr-a- 260828 - as built architectural drawings_Part2.pdf (219 kb) Description: As Built Architectural Elevations Created Date: 09/09/2026
Floor Plans
File: 16mrd-atg-02-zz-dr-a- 260828 - proposed architectural drawings_Part1.pdf (272 kb) Description: Proposed Architectural Floor Plans Created Date: 09/09/2026
File: 16mrd-atg-01-zz-dr-a- 260822 - approved architectural drawings_Part1.pdf (276 kb) Description: Approved Architectural Floor Plans Created Date: 09/09/2026
File: 16mrd-atg-00-zz-dr-a- 260828 - as built architectural drawings_Part1.pdf (272 kb) Description: As Built Architectural Floor Plans Created Date: 09/09/2026
Location Plan
File: LocationPlan.pdf (378 kb) Description: Location Plan Created Date: 09/09/2026
Site Sections
File: 16mrd-atg-02-zz-dr-a- 260828 - proposed architectural drawings_Part4.pdf (211 kb) Description: Proposed Architectural Section A-A , B-B Created Date: 09/09/2026
File: 16mrd-atg-01-zz-dr-a- 260822 - approved architectural drawings_Part4.pdf (183 kb) Description: Approved Architectural Section Created Date: 09/09/2026
File: 16mrd-atg-00-zz-dr-a- 260828 - as built architectural drawings_Part3.pdf (145 kb) Description: As Built Architectural Section Created Date: 09/09/2026
Design & Access Statement
File: 16mrd-atg-zz-zz-rp-a-0001 - 260907 - design access and planning statement_Redacted.pdf (58676 kb) Description: Planning, Design and Access Statement_Redacted Created Date: 09/09/2026
Planning Statement
File: 16mrd-atg-zz-pll-a-0001 - 260907 - planning letter_Redacted.pdf (152 kb) Description: Planning Letter_Redacted Created Date: 09/09/2026
Roof Plans
File: 16mrd-atg-02-zz-dr-a- 260828 - proposed architectural drawings_Part2.pdf (231 kb) Description: Proposed Architectural Roof Plan Created Date: 09/09/2026
File: 16mrd-atg-01-zz-dr-a- 260822 - approved architectural drawings_Part2.pdf (225 kb) Description: Approved Architectural Roof Plan Created Date: 09/09/2026
Site Plan
File: 16mrd-atg-01-sp-dr-a- 260811 - a- 01.sp - approved site plan.pdf (210 kb) Description: Site Plan Created Date: 09/09/2026
File: 16mrd-atg-00-sp-dr-a- 260828 -a- 01.sp - as built site plan.pdf (246 kb) Description: As Built Site Plan Created Date: 09/09/2026
Organisation Name Sent Reply Due Reply Received
Welwyn Hatfield Borough Council Councillor Claire Hunt 16/09/2026 07/10/2026
Welwyn Hatfield Borough Council Councillor Durk Reyner 16/09/2026 07/10/2026
Welwyn Hatfield Borough Council Councillor Julie Cragg 16/09/2026 07/10/2026
Welwyn Parish Council Kharlie Staves 16/09/2026 07/10/2026
Hertfordshire Ecology Martin Hicks 16/09/2026 07/10/2026
Welwyn Hatfield Borough Council WHBC S106 and CIL Officer 16/09/2026 07/10/2026
Address Date Sent Expiry Date Date Reconsulted Reconsult Expiry Date
14 Mardley Avenue Welwyn AL6 0UD 16/09/2026 07/10/2026
18 Mardley Avenue Welwyn AL6 0UD 16/09/2026 07/10/2026
21 Mardley Avenue Welwyn AL6 0TU 16/09/2026 07/10/2026
23 Mardley Avenue Welwyn AL6 0TU 16/09/2026 07/10/2026
25 Mardley Avenue Welwyn AL6 0TU 16/09/2026 07/10/2026
2 Rosecroft Lane Welwyn AL6 0UB 16/09/2026 07/10/2026
Application Number Proposal Decision Distance
6/2023/1610/TPO 3x Sweet Chestnut trees at no 14 Mardley Avenue - crown reduction to maintain, and to rectify any tree defects: T1 - Crown reduction of 4 meters in height (back to previous) and 2m in width (equating to 20%), tree is close to the dwelling of 19 Marlborough Close and foreseeable to cause mechanical damage in future T2 - Crown reduction of 2 meters, tree is growing up tight to the fence and over the garden of 19 Marlborough Close and 2 Rosecroft Lane obstructing light penetration to the garden T3 - Crown reduction of 2 metres (equating to 20%) with dead wooding, tree is growing up tight to the fence and over the garden of 2 Rosecroft Lane obstructing light penetration to the garden Granted 0
6/2023/0670/TPO Fell T1 dead Horse Chestnut within TPO 24 Area 3 Granted
6/2020/0818/HOUSE Erection of two storey side and porch extension Granted 0
6/2019/2781/HOUSE Erection of front porch and two storey side extension to form ancillary dwelling Refused 0
6/2019/0991/HOUSE Side extension for a garage following conversion of existing garage Withdrawn 0
6/2018/2742/HOUSE Installation of 1 front dormer, 1 rear dormer and 2 rooflights for loft conversion, erection of a single storey rear/side extension, increase in height of garage. Construction of rear decking area and balustrade. Granted
6/2018/2090/HOUSE Installation of 1 front and 1 rear dormer window and 2 rooflights to facilitate loft conversion, erection of a single storey rear extension and installation of front window to facilitate conversion of garage to habitable space. Reduction in the size of the side window. Installation of rooflights into existing single storey rear extension. Construction of rear decking area, with associated steps and balustrades. Refused
6/2018/1851/HOUSE Installation of front and side dormers to facilitate roof alterations and recessed rear terrace with balustrade. Erection of a front porch. Replacement front windows and doors. Alterations to windows and doors Granted 0
643 (2017) for the continued amenity of the area following a review of the landscape. 0
6/2015/1529/HOUSE Erection of single storey rear extension and removal of side window and rear decked area Granted 0
N6/2008/1809/DS DISCHARGE OF CONDITION 2 (MATERIALS) OF PLANNING PERMISSION N6/2007/310/FP Granted 0
N6/2007/1026/FP ERECTION OF A TWO STOREY REAR EXTENSION AND INSERTION OF A FRONT DORMER Refused 0
N6/2007/0310/FP ERECTION OF A SINGLE STOREY REAR EXTENSION, RAISING OF ROOF, AND INSERTION OF FRONT DORMER WINDOW. Appeal Allowed 0
N6/2007/0310/FP ERECTION OF A SINGLE STOREY REAR EXTENSION, RAISING OF ROOF, AND INSERTION OF FRONT DORMER WINDOW. Refused 0
N6/1997/0477/FP Erection of replacement dwelling Granted 0
N6/1996/0247/FP Erection of two storey rear extension and side conservatory and alterations to roof to provide dormers and pitched roof over garage Granted 0
N6/1989/0446/TP Prune Sycamore Tree in rear garden Granted 0
N6/1989/0256/FP Erection of five detached dwellings with garages, together with associated works and access, after demolition of existing dwelling Refused 0
24 (1976) For the continued amenity of the land. 0

There are no NMAs associated with this application