Planning application
26/0865/CLP
15 Thornbury Gardens Borehamwood Hertfordshire WD6 1RB
Proposal
Erection of outbuilding in rear garden. Certificate of lawful development (Proposed).
As published by the council, reference 26/0865/CLP
Timeline
Dates from the published record
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23 Jun 2026
Received by Hertsmere
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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 Hertsmere 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 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
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21/0600/HSE Granted
40 Manor Way Borehamwood Hertfordshire WD6 1QY
Single storey rear extension. (amended plans received 24/06/2021 reducing rear extension depth).
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23/0259/PD42 Granted
7 Thornbury Gardens Borehamwood Hertfordshire WD6 1RB
Single storey rear extension. Depth: 6.00m, Height: 2.71m, Eaves: 2.55m
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26/0921/HSE Awaiting decision
29 Kenilworth Drive Borehamwood Hertfordshire WD6 1QL
Installation of rear conservatory.
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24/1154/CLP Granted
58 Thornbury Gardens Borehamwood Hertfordshire WD6 1RE
Change of use from C3 to C4 (5 person HMO). Demolition of existing outbuilding to allow for single storey rear extension.
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24/1248/CLP Granted
58 Thornbury Gardens Borehamwood Hertfordshire WD6 1RE
Conversion of loft to habitable space including rear dormer. Certificate of lawful development (Proposed).
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24/1155/HSE Granted
58 Thornbury Gardens Borehamwood Hertfordshire WD6 1RE
Part single part two storey rear extension following demolition of outbuilding.
Other lawful development applications
In Hertsmere
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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).
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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).
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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).
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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).
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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).