Sentinel House 193 - 197 Old Marylebone Road London W1H 4AD

1. 30 May 2007

   Received by Westminster

2. 26 Jun 2007

   Decision issued: Application Permitted

3. 20 Aug 2026

   Added to PlanIndex

Westminster granted permission on 26 June 2007, 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.

Applications for works to trees cover protected trees: consent under a tree preservation order, or six weeks notice for trees in a conservation area. More in our guide to planning application types.

• Sentinel House 16 Harcourt Street London W1H 4AD

  07/09566/CLEUD Submitted 2 Nov 2007 50 yards away

  Use of the sixth floor as offices (Class B1).

  Granted Lawful development 4 docs

• Sentinel House 16 Harcourt Street London W1H 4AD

  06/04937/FULL Submitted 22 Jun 2006 50 yards away

  Retention of three air conditioning condenser units and installation of one emergency generator within an existing plant enclosure at sixth floor roof level.

  Granted Full applications 8 docs

• 12 - 14 Harcourt Street London W1H 4HD

  06/06031/ADFULL Submitted 28 Jul 2006 50 yards away

  Details of rolled lead roof to approved extension pursuant to Condition 4 of planning permission dated 08 June 2006 (RN: 06/00236).

  Granted Full applications Extension 2 docs

• 12 - 14 Harcourt Street London W1H 4HD

  26/02158/ADV Submitted 31 Mar 2026 50 yards away

  82% historically approved · decision due ~26 May

  Display of two non-illuminated fascia signs measuring 0.31m x 1.98m and 0.46m x 3m. [Linked to 26/02157/FULL]

  Awaiting decision Advertising 1 doc

• 12 - 14 Harcourt Street London W1H 4HD

  26/02157/FULL Submitted 31 Mar 2026 50 yards away

  88% historically approved · decision due ~26 May

  Extension of and improvements to the existing ground floor terrace to the rear, modification to entrances, installation of security access gate, other associated external works and the installation of new signage. [Linked to 26/02158/ADV]

  Awaiting decision Full applications Extension 1 doc

• 12 - 14 Harcourt Street London W1H 4HD

  06/00236/FULL Submitted 12 Jan 2006 50 yards away

  Extension of rear second and third floors to provide additional office space (Class B1) and creation of a terrace area to the rear and side of the first floor. Installation of three air conditioning units to the rear first floor level.

  Granted Full applications Extension 11 docs

• 26/06901/TPO Decided

  110 Maida Vale London W9 1PS

  T3 Walnut: Raise crown over the beds by approximately 2m and clear Cherry. Reduce remaining crown back to previous and most recent reduction points up to approximately 1.5m. Thin crown density evenly throughout by 20%. T4 Walnut: Reduce back to previous and most recent points of reduction up to approximately 1.5m. Thin crown density by 20%. Remove dead wood. T5 Fig: Reduce lateral growth hard back garden side by approximately 1.25-1.5m. Reduce crown height back to previous points of reduction (approximately 1.4m). T7 Mulberry: Reduce crown road side by approximately 1.2m. Raise crown road side by approximately 1.2m. Thin crown density throughout by 20%. Reduce remaining over extended branches which protrude from the main crown structure back in to the main crown.

  Received 8 Oct, published by the council 12 Oct 2026 Trees
• 26/07241/TCA Awaiting decision

  11 Castellain Road London W9 1EY

  T1 - Mature Sycamore- Carry out a crown reduction of up to 3m in height and up to 2m laterally back to the previous, most recent established pruning points, retaining a balanced crown structure and natural form. Pruning cuts will be made to suitable growth points. T2 - Field Maple- Undertake a crown reduction of approx 2m in height and 1.5m laterally appropriate to the tree?s condition, structure and previous pruning history, whilst retaining a natural crown shape and viable growth points. Where suitable, reduce the crown to the previous reduction points, pruning back to appropriate secondary branches or growth points to create a balanced, natural-flowing canopy outline. As an Arboricultural Approved contractor (#AC2626), all works will be undertaken in accordance with BS39982010 - Tree Work - Recommendations. Reason for work: General tree maintenance

  Received 22 Oct, published by the council 23 Oct 2026 Trees
• 26/07207/TCA Awaiting decision

  2 Motcomb Street London SW1X 8JU

  T1, T2 and T3 - Bay Laurel reduce height by approx 2-3m from tips and shorten lateral growth by 1m from tips.

  Received 21 Oct, published by the council 23 Oct 2026 Trees
• 26/07205/TPO Awaiting decision

  Garden Enclosure Portman Square London W1H 6LJ

  T8 - CHERRY - - End-weight reduction - Specified extent Reduce crown of NE stem by 1 .5m, reducing load on decay canker and subsequent risk of failure. T22 - ACER - Prune from adjacent structure to clear lamp column by 1 meter T24 - CHERRY - - Lift low canopy - Pedestrian clearance to 4.5m over road. T37 - CHERRY - Remove faulted limb / limbs Remove lowest south facing branch to stem. G73 - CERCIS CANADENSIS - Lift low canopy - Pedestrian clearance to 2.5 m over footpath.

  Received 21 Oct, published by the council 23 Oct 2026 Trees
• 26/07220/TCA Awaiting decision

  Overseas House Park Place London SW1A 1LR

  T1 Betula jacquemontii- Fell- This tree has out grown its position in the small herbacious border and garden, it is blocking light and the roots are suppressing the growth of other ornamental shrubs and trees- The owner would like to remove it before it gets any larger- a poor choice for such a small garden, also blocking the view in to Green park. T2 Prunus sp.- Fell As above , in addition the trees lower branches have been removed and now has impaired form, is being suppressed by the London Plane tree and it has very few blossoms in the spring. If nessessary the tree owner would be prepared to replace the two trees with a more suitable tree

  Received 21 Oct, published by the council 23 Oct 2026 Trees