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

Hertsmere granted permission on 17 August 2021, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.

An outline application tests the principle of developing a site, holding back details such as appearance and landscaping as reserved matters for later approval. More in our guide to planning application types.

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

  26/0793/LBC Submitted 9 Jun 2026 50 yards away

  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.)

  Decided 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 50 yards away

  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.)

  Decided 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 50 yards away

  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

  26/1399/LBC Submitted 28 Sep 2026 50 yards away

  87% historically approved · decision due ~23 Nov

  Repairs and associated alterations to an outbuilding attached to Tyttenhanger House.

  Awaiting decision Heritage and listed buildings

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

  25/0445/FUL Submitted 24 Mar 2025 100 yards 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 100 yards 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

• 26/1236/OUTEI Awaiting decision

  Home Farm Common Lane Radlett Hertfordshire WD7 8PL

  Outline planning application (with all matters reserved except access) comprising a residential development of up to 650 dwellings (Use Class C3); a one-form entry primary school and nursery; supporting mixed uses (Use Classes E and F) with associated landscaping; amenity space; drainage infrastructure and all other associated works. The application is accompanied by an Environmental Statement (EIA Development).

  Received 26 Aug, published by the council 29 Sep 2026 Outline
• 26/0962/EI2 Decided

  Land Known As Home Farm Common Lane Radlett Hertfordshire

  Request for a scoping opinion (Environmental Impact Assessment).

  Received 10 Jul, published by the council 24 Jul 2026 Outline
• 26/1112/OUT Awaiting decision

  Land South Of Allum Lane Elstree Borehamwood Hertfordshire

  Outline planning application (with all matters reserved except access) for the erection of residential dwellings (Class C3), new access, landscaping, parking and ancillary works.

  Received 5 Aug, published by the council 9 Aug 2026 Outline
• 26/1048/OUT Awaiting decision

  Land Rear Of 31 - 61 Blanche Lane South Mimms Hertfordshire

  Construction of up to 49 dwellings on Land off Blanche Lane. (Outline application to include access, all other matters reserved)

  Received 28 Jul, published by the council 11 Aug 2026 Outline
• 26/0988/OUT Awaiting decision

  W Block Clare Hall Laboratories Blanche Lane South Mimms Hertfordshire

  Outline application (with all matters reserved except for means of access) for the demolition of buildings on site and erection of up to 185 homes (including 50% affordable housing) alongside access, landscaping, car parking and associated works.

  Received 17 Jul, published by the council 1 Aug 2026 Outline