Planning application
26/00510/FULH
211 Cassiobury Drive Watford WD17 3AN
Proposal
Erection of part single, part double storey side and rear extensions, associated raised rear patio, part single storey front extension, loft conversion including x2 side facing rooflights and x1 front and rear rooflights and erection of single storey rear outbuilding
As published by the council, reference 26/00510/FULH
Timeline
Dates from the published record
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3 Jul 2026
Received by Watford
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6 Jul 2026
Validated
Checked as complete and ready for consideration.
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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 Watford 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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23/00920/HPD Granted
328 Cassiobury Drive Watford WD17 3AW
The erection of a single storey rear extension which would extend beyond the rear wall of the original house by 6m for which the maximum height would be 3m and for which the height of the eaves would be 2.90m
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24/00827/FULH Decided
312 Cassiobury Drive Watford WD17 3AW
Erection of double storey rear extension, first floor side extension, loft conversion including rear and side dormers and x2 front roof lights
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22/00186/FULH Decided
336 Cassiobury Drive Watford Hertfordshire WD17 3AW
Proposed second floor loft conversion, single storey rear extension, garage conversion and internal alterations, also a first floor front extension.
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23/01008/HPD Granted
55 Harford Drive Watford Hertfordshire WD17 3DQ
The erection of a single storey rear extension which would extend beyond the rear wall of the original house by 6.00m for which the maximum height would be 2.90m and for which the height of the eaves would be 2.60m
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23/00172/LDC Granted
61 Harford Drive Watford Hertfordshire WD17 3DQ
Lawful Development Certificate for a hip to gable roof conversion that involves the addition of a rear dormer.
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25/00589/FULH Decided
304 Cassiobury Drive Watford WD17 3AP
Retrospective application for existing x2 rear outbuildings and proposed side boundary treatment
Other householder applications
In Watford
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26/00582/FULH Awaiting decision
23 Westlea Avenue Watford WD25 9DH
Erection of single story side extension and front porch extension
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26/00578/FULH Awaiting decision
149 Rickmansworth Road Watford WD18 7FH
Erection of a single storey side and dormer roof extension comprising of new side Dutch gable to match 149a Rickmansworth Road.
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26/00576/FULH Awaiting decision
86 Fourth Avenue Watford Hertfordshire WD25 9QQ
(Retrospective) Erection of a single-storey outbuilding with a flat roof. The maximum overall height of the building is 2,850 mm.
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26/00449/FULH Refused
61 Park Road Watford WD17 4QJ
Erection of a first-floor extension over the existing flat roof (incorporating the scheme previously approved under ref: 26/00051/VAR) alongside a new loft conversion to provide additional habitable accommodation
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26/00413/FULH Decided
48 Meadow Road Watford WD25 0JA
Erection of a single storey side extension.