North London AD Facility, Coursers Farm, Coursers Road, Colney Heath, AL4 0PG

1. 21 Jul 2021

   Received by Hertsmere

2. 17 Aug 2021

   Decision issued: Raise No Objections

3. 18 Aug 2026

   Added to PlanIndex

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.

An outline application tests the principle of developing a site before the detail is worked up. Some or all of the particulars, such as appearance, layout, scale, access and landscaping, are held back as reserved matters for later approval. Permission at outline stage does not by itself allow building to start; the reserved matters must be approved first.

More on outline applications in our guide

• Tyttenhanger House Coursers Road Colney Heath St Albans Hertfordshire AL4 0PG

  26/0793/LBC Submitted 9 Jun 2026 0m away

  84% historically approved · decision due ~25 Aug

  Repair and conservation of the timber roof structure and pitched roof coverings, re-covering of lead surfaces to the flat valley roof; repair and restoration of the clock tower (cupola), chimneys and entrance canopy; repair, repointing and conservation of the brick envelope; repairs to lead flashing, gutters, pipes and rainwater goods; repair of external windows; installation of roof insulation and photo-voltaic panels; repair of windows and doors; refurbishment and conservation of third floor including long gallery, addition of secondary window glazing; provision of kitchen and WCs; installation of lighting, fixtures and fittings; installation of glazed partitions; repainting, repair and conservation of timber panelling and associated works. (Associated application for full planning permission 26/0801/FUL.)

  Awaiting decision Heritage and listed buildings Roofing Windows or glazing 76 docs

• Tyttenhanger House Coursers Road Colney Heath St Albans Hertfordshire AL4 0PG

  26/0801/FUL Submitted 9 Jun 2026 0m away

  84% historically approved · decision due ~25 Aug

  Repair and conservation of the timber roof structure and pitched roof coverings, re-covering of lead surfaces to the flat valley roof; repair and restoration of the clock tower (cupola), chimneys and entrance canopy; repair, repointing and conservation of the brick envelope; repairs to lead flashing, gutters, pipes and rainwater goods; repair of external windows; installation of photo-voltaic panels and ancillary external works. (Associated listed building consent application 26/0793/LBC.)

  Awaiting decision Full applications Roofing Windows or glazing 48 docs

• Tyttenhanger House Coursers Road Colney Heath St Albans Hertfordshire AL4 0PG

  26/0713/DOC Submitted 26 May 2026 0m away

  84% historically approved · decision due ~21 Jul

  Application for approval of details reserved by condition 4 (Internal doors to meeting room 01 and kitchen) (part discharge) of planning permission reference 25/0446/LBC.

  Decided Conditions 12 docs

• Tyttenhanger House Coursers Road Colney Heath St Albans Hertfordshire AL4 0PG

  25/0445/FUL Submitted 24 Mar 2025 69m away

  Change of use to provide flexible class C3 (dwellinghouse) or class E(g)(i)(offices) together with internal refurbishment and consequential internal and external alterations including improving pedestrian access, steps, installation of new external door and replacement windows. (Associated Listed Building Consent 25/0446/LBC)

  Granted Full applications Windows or glazing 45 docs
  Domestic

• Tyttenhanger House Coursers Road Colney Heath St Albans Hertfordshire AL4 0PG

  25/0446/LBC Submitted 24 Mar 2025 69m away

  Internal refurbishment and consequential internal and external alterations including improving pedestrian access, steps and new external door and installation of replacement windows to facilitate the change of use to provide flexible class C3 (dwellinghouse) or class E(g)(i)(offices). (Listed Building Consent with associated full application 25/0445/FUL)

  Granted Heritage and listed buildings Windows or glazing 44 docs
  Domestic

• Tyttenhanger House Coursers Road Colney Heath St Albans Hertfordshire AL4 0PG

  22/2005/DOC Submitted 1 Dec 2022 212m away

  Application for approval of details reserved by Condition 2 (details of the proposed cleaning of the panelling, size of the power boxes, implementation of building regulations including fire proofing of doors and the position of extraction facilities, and proposed installation of emergency lighting) of planning permission reference 21/0735/LBC.

  Decided Conditions 9 docs

• 26/0962/EI2 Decided

  Land Known As Home Farm Common Lane Radlett Hertfordshire

  Request for a scoping opinion (Environmental Impact Assessment).

  10 Jul 2026 Outline
• 25/1379/OUT Granted

  Fields Theobald Street Radlett Hertfordshire WD7 7LS

  Demolition of dwelling (Use Class C3) to provide 4x new dwellings (Use Class C3). Outline planning application (with all matters reserved except access).

  19 Sep 2025 Outline
• 26/0838/EI1 Granted

  Imperial Place Maxwell Road Borehamwood Hertfordshire

  Request for screening opinion (Environmental Assessment - Screening).

  16 Jun 2026 Outline
• 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).

  25 Jul 2025 Outline
• 26/0723/EI1 Granted

  Land To The West Of Swanland Road South Mimms Hertfordshire

  Request for screening opinion (Environmental Assessment - Screening) - Proposed development of a solar farm, including associated ancillary infrastructure and development and landscape and environmental enhancements

  27 May 2026 Outline