Stilegate Blanche Lane South Mimms EN6 3LF

1. 15 Aug 2007

   Received by Hertsmere

2. 3 Dec 2007

   Validated

   Checked as complete and ready for consideration.

3. 4 Feb 2008

   Decision issued: Grant Permission

4. 15 Sep 2026

   Added to PlanIndex

Hertsmere granted permission on 4 February 2008, 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.

The published feed does not state which type of application this is; the register entry on Hertsmere's portal will say. Our guide explains the common types.

• W Block Clare Hall Laboratories Blanche Lane South Mimms Hertfordshire

  22/0876/FUL Submitted 18 May 2022 150 yards away

  Erection of two new buildings within the grounds and an extension to the W-Block for research and development use (Class E), car parking, servicing, landscaping and associated works.

  Granted Full applications Extension 76 docs

• Clare Hall Manor Blanche Lane South Mimms Hertfordshire EN6 3LD

  22/1180/LBC Submitted 5 Jul 2022 200 yards away

  Internal alterations to the Modern West Wing to include removal of the north stairwell, widening of the first floor terrace and subdivision of the Modern West Wing to include layout changes to common room, to provide plant and laundry rooms. Widening of the first floor terrace at the southern end of the western wing and like for like replacement of rainwater goods. Internal alterations to the Main House to allow for the conversion of the communal kitchen to a common room (following grant of application 19/2031/LBC). (Application for Listed Building consent).

  Granted Heritage and listed buildings 15 docs

• Stilegate Blanche Lane South Mimms Potters Bar EN6 3LF

  TP/08/0367 Submitted 29 Feb 2008 200 yards away

  Erection of two storey dwelling (with basement below) following demolition of existing dwelling (amended plans received 11/07/08)

  Granted Full applications Demolition 7 docs
  Domestic

• W Block Clare Hall Laboratories Blanche Lane South Mimms Hertfordshire

  26/0988/OUT Submitted 17 Jul 2026 200 yards away

  87% historically approved · decision due ~11 Sep

  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.

  Awaiting decision Outline Demolition 105 docs

• N I B S C Blanche Lane South Mimms EN6 3QG

  TP/06/1348 Submitted 24 Oct 2006 400 yards away

  Erection of single storey laboratory building at the centre of the site (temporary permission).

  Granted Full applications 7 docs
  Small domestic

• 15 Blanche Lane South Mimms Potters Bar Hertfordshire EN6 3NY

  26/0061/FUL Submitted 20 Jan 2026 0.3 miles away

  Demolition of existing detached bungalow to facilitate construction of 3x two storey dwellings (2x semi-detached and 1x detached) to include hard and soft landscaping, front boundary works to include new crossover and erection of cycle and bin storage.

  Refused Full applications Demolition 26 docs