Planning application
26/0718/CLP
21 Holly Drive Potters Bar Hertfordshire EN6 2QL
Proposal
Construction of part single, part two storey rear extension with associated roof works. Certificate of Lawful Development (Proposed).
As published by the council, reference 26/0718/CLP
Timeline
Dates from the published record
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26 May 2026
Received by Hertsmere
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14 Jul 2026
Decision issued: Refuse to Grant Certificate
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24 Jul 2026
Added to PlanIndex
What refusal means
The process from here
The council refused this application for the reasons set out on the decision notice, which the council portal holds in full. Only the applicant can appeal a refusal; the time limit runs from the decision date and is shorter for householder schemes.
Refusal does not prevent a fresh attempt. Applicants often address the reasons for refusal and resubmit, so a refused scheme is not necessarily the end of proposals for the site.
About lawful development applications
How this application type works
A lawful development certificate is a legal determination, not a planning judgement. It asks the council to confirm either that existing use or works are lawful, often through the passage of time, or that a proposal would not need planning permission at all. The applicant must prove the facts; the merits of the scheme are not considered.
Nearby applications
Within 500 metres
-
26/0995/CLE Awaiting decision
22 Holly Drive Potters Bar Hertfordshire EN6 2QL
Conversion of house to 6x bed HMO (Class C4). Certificate of lawful development (Existing).
-
23/0155/HSE Refused
7 Holly Drive Potters Bar Hertfordshire EN6 2QL
Erection of front porch. (Retrospective application)
-
26/0764/FUL Awaiting decision
Canada Life Place Building Mutton Lane Potters Bar EN6 5BA
External alterations to facade and fenestration, removal of rooftop plant enclosure, and associated landscaping works.
-
26/0626/FUL Awaiting decision
Building To The Rear Of 28 - 30 Barnet Road Potters Bar Hertfordshire
Change of use to vehicle repairs, and associated alterations including replacement of doors and windows with shutters.
-
25/1105/OUT Granted
44 Barnet Road Potters Bar Hertfordshire EN6 2QU
Demolition of existing detached two storey mixed use building to facilitate construction of four storey mixed use building with accommodation in the roof space providing 11x flats and 2x ground floor commercial units. Associated hard and soft landscaping and bin / cycle storage. (Outline application with all matters reserved).
-
26/0694/PD42 Granted
29 Willow Way Potters Bar Hertfordshire EN6 2PR
Single storey rear extension. Depth: 5.59m, Height: 3.00m, Eaves: 3.00m.
Other lawful development applications
In Hertsmere
-
26/0872/CLP Granted
118 Theobald Street Borehamwood Hertfordshire WD6 4PA
Conversion of loft to habitable space with associated hip to gable roof alterations, to include rear dormer, insertion of 3x front rooflights and removal of chimney stack. Certificate of Lawful Development (Proposed).
-
26/0681/CLP Granted
40 Carrington Avenue Borehamwood Hertfordshire WD6 2HA
Conversion of loft to habitable space to include rear dormer, 3x front rooflights and removal of chimney stack Certificate of Lawful Development (Proposed).
-
26/1014/CLP Awaiting decision
24 Mount Grace Road Potters Bar Hertfordshire EN6 1RD
Construction of a single-storey outbuilding within the rear garden. Certificate of Lawful Development (Proposed).
-
26/1015/CLP Awaiting decision
24 Mount Grace Road Potters Bar Hertfordshire EN6 1RD
Construction of a single-storey BBQ within the garden. Certificate of Lawful Development (Proposed).
-
26/1011/CLE Awaiting decision
6 Brickfield Cottages Theobald Street Borehamwood Hertfordshire WD6 4SD
Construction of a single-storey detached outbuilding within the rear garden of the existing dwellinghouse for use as a private gym incidental to the enjoyment of the main dwelling (Use Class C3). Certificate of Lawful Development (Existing).