Planning application
6/2026/1031/HOUSE
17 Sycamore Avenue Hatfield AL10 8LZ
Proposal
Erection of a part single storey, part two-storey rear extension, garage conversion, front porch extension, alterations to fenestration and external materials
As published by the council, reference 6/2026/1031/HOUSE
Timeline
Dates from the published record
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12 Jun 2026
Received by Welwyn Hatfield
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24 Jul 2026
Added to PlanIndex
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Decision
Awaiting decision
The statutory target is eight weeks for most applications and thirteen for major development. Extensions of time are common.
What happens while it is decided
The process from here
This application is with Welwyn Hatfield for determination. The council publicises it, consults neighbours and technical bodies where required, and weighs the responses against local and national planning policy.
The statutory target is eight weeks for most applications and thirteen for major development, though extensions of time are common. Comments carry most weight while the case is undecided, so check the council portal for the deadline if you want to respond.
About householder applications
How this application type works
Householder applications cover work to an existing house and its garden: extensions, loft and garage conversions, porches, outbuildings and similar alterations within the boundary of the home. They cannot be used to create a separate dwelling or change what the building is used for. Councils aim to decide them within eight weeks, and immediate neighbours are usually notified and given a chance to comment.
Nearby applications
Within 500 metres
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6/2026/1160/HOUSE Awaiting decision
2 Sycamore Avenue Hatfield AL10 8LZ
Installation of a sliding front boundary gate, raising the roof height and converting the garage into habitable use, installation of a pergola to the rear elevation of the dwelling and alteration to fenestration.
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6/2025/2267/VAR Refused
The former Three Valleys Water site (now Peregrine Way) Bishops Rise Hatfield 38 Hatfield Delivery Office Po Box 48 Town Centre Hatfield AL10 9HL
Variation of Condition 2 (Approved Plans) and removal of condition 16 (Kissing Gate) on planning permission S6/2012/1790/S73B
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6/2021/1025/HOUSE Refused
1 Peregrine Way Hatfield AL10 9UP
Erection of two storey front and side extension; conversion of loft to habitable space; insertion of upper floor window on side elevation; and insertion of rooflights.
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6/2025/2484/FULL Granted
109 Woods Avenue Hatfield AL10 8QQ
Retrospective subdivision of flat into two separate dwellings
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6/2024/1792/FULL Granted
109 Woods Avenue Hatfield AL10 8QQ
Erection of a rear extension
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6/2026/0249/FULL Granted
23 Cedar Road Hatfield AL10 8NZ
Change of use from dwellinghouse (Use Class C3) to a 4 bedroom House in Multiple Occupation (Use Class C4) and installation of a cycle rack
Other householder applications
In Welwyn Hatfield
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6/2025/2262/HOUSE Granted
9 Hill Rise Cuffley Potters Bar EN6 4ED
Erection of a part single and part two storey rear extension, garage conversion to habitable use and alterations to fenestration
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6/2026/0904/HOUSE Granted
7 Greenfield Hatfield AL9 5HW
Erection of a single storey rear extension, conversion of double integral garage, covered porch, replacement front dormer and erection of new boundary wall following the removal of the existing hedge
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6/2026/0975/HOUSE Granted
4 Northwood Welwyn Garden City AL7 2PX
Erection of single storey rear extension and open pergola following demolition of conservatory
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6/2026/0998/HOUSE Granted
41 Lemsford Lane Welwyn Garden City AL8 6YN
Erection of a single storey side/rear extension following the demolition of existing outbuilding
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6/2026/1293/HOUSE Awaiting decision
33 Claves Crescent Welwyn Garden City AL7 1WN
Erection of a single storey rear conservatory