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Planning application

26/0872/CLP

118 Theobald Street Borehamwood Hertfordshire WD6 4PA

Granted Hertsmere Certificate Proposed Lawful Use/Dev

Proposal

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).

As published by the council, reference 26/0872/CLP

Timeline

Dates from the published record

  1. 24 Jun 2026

    Received by Hertsmere

  2. 24 Jul 2026

    Added to PlanIndex

  3. 28 Jul 2026

    Decision issued: Permitted

What a grant of permission means

The process from here

Permission has been granted, usually subject to conditions listed on the decision notice, some of which must be discharged before work starts. The decision notice on the council portal sets out exactly what was approved.

Work must normally begin within three years of the decision or the permission lapses. Neighbours cannot appeal a grant; challenging one means judicial review of how the decision was made, within tight time limits.

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.

More on lawful development applications in our guide

Nearby applications

Within 500 metres

  • 23/0024/HSE Granted

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    Demolition of existing rear extension and garage, construction of two storey side extension, part single, part two storey rear extension, new front canopy, front dormer and alterations to fenestration to include 2 x rear roof lights. (AMENDED DESCRIPTION: 09/03/2023 - front dormer)

    6 Jan 2023 97m away Householder
  • 21/1250/TPO Granted

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    T11 OAK. Crown reduce in height from 10m to 8m and width from 8m to 6m.

    15 Jun 2021 170m away Trees
  • 21/1111/HSE Granted

    105 Theobald Street Borehamwood Hertfordshire WD6 4PT

    Conversion of garage to habitable room. Single storey front extension and insertion of roof lanterns to existing rear extension.

    24 May 2021 304m away Householder
  • 26/0525/HSE Granted

    68 Linton Avenue Borehamwood Hertfordshire WD6 4QY

    Construction of single storey front porch with pitched roof and external render. (Retrospective.)

    20 Apr 2026 321m away Householder
  • 24/1052/HSE Granted

    2 Chiltern Close Borehamwood Hertfordshire WD6 4ND

    Conversion of garage to habitable space, two storey side extension with associated roof works and insertion of 2x rooflights. Front porch extension with new front entrance and alterations to fenestration.

    14 Aug 2024 323m away Householder
  • 26/0900/FUL Awaiting decision

    The Pavilion 82 Aycliffe Road Borehamwood Hertfordshire WD6 4JW

    Change of use from F2 (football club) to a mix of F2 and F1(a) for the additional provision of preschool services.

    29 Jun 2026 330m away Full applications

In Hertsmere

  • 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).

    19 May 2026 Lawful development
  • 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).

    22 Jul 2026 Lawful development
  • 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).

    22 Jul 2026 Lawful development
  • 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).

    21 Jul 2026 Lawful development
  • 26/0791/CLP Granted

    56 Rushfield Potters Bar Hertfordshire EN6 3HJ

    Conversion of loft to habitable space with rear dormer and Juliet balcony, and insertion of 3x front rooflights. Certificate of Lawful Development (Proposed).

    8 Jun 2026 Lawful development