16 Downshire Hill London NW3 1NT

1. 2 Jul 2020

   Decision issued: Granted

2. 22 Jul 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.

Heritage applications concern listed buildings and conservation areas. Listed building consent is needed for works, inside or out, that affect the special interest of a listed building, and carrying out such works without consent is a criminal offence. The council weighs harm to the heritage asset against any public benefit of the proposal.

More on heritage and listed buildings applications in our guide

• Hampstead Hill Mansions Downshire Hill London NW3 1NY

  2025/2828/T 0m away

  REAR GARDEN: 1 x Sycamore (T1) - Fell to ground level.

  Granted Trees

• Hampstead Hill Mansions Downshire Hill London NW3 1NY

  2025/5507/T Submitted 4 Dec 2025 0m away

  REAR GARDEN: 1 x Cherry (T2) - Reduce this stem by 3m - 4m to suitable pruning points.

  Granted Trees 3 docs

• Hampstead Hill Mansions Downshire Hill London NW3 1NY

  2022/1370/T 0m away

  REAR GARDEN: 1 x Ash (T1) - Reduce crown by 3m on all aspects. 1 x Sycamore (T2) - Reduce height by 2.5m, reduce branches over neighbour's garden by up to 3m, ensuring 2m clearance from building. 1 x Thuja (T4) - Reduce height by 2m. 1 x Mock Orange (T5) - Reduce down to previous cuts, (around 2.5m reduction). 1 x Cherry (T6) - Reduce two leaning stems over grass to 2m below previous, reduce remaining crown back to previous cuts, (1.5m reduction). 1 x Thuja (T7) - Reduce height by 1.5m. 1 x Norway Maple (T8) - Reduce crown back to most recent cuts, (2.5m reduction). 1 x Photinia (T9) - Reduce overlong branches by 2m. 1 x Cherry (T11) - Reduce crown back to previous cuts, (2m reduction). 1 x Apple (T12) - Reduce crown by 3m. 1 x Contorted Willow (T13) - Reduce crown back to previous cuts, (1.5m reduction). 1 x Juniper (T14) - Fell to ground level. 1 x Elder (T15) - Reduce down to 2m. 1 x Sycamore (T16) - Reduce crown by 3m on all aspects.

  Granted Trees

• Hampstead Hill Mansions Downshire Hill London NW3 1NY

  2024/3849/T 0m away

  REAR SIDE GARDEN: 2 x Sycamores (T1 & T2) - Lift crown by approx. 4m on garage (Annex) axis reducing major lower limbs that extend over boundary, thin and shape top crown.

  Granted Trees

• Hampstead Hill Mansions Downshire Hill London NW3 1NY

  2026/3441/P Submitted 12 Aug 2026 0m away

  91% historically approved · decision due ~14 Oct

  Provision of balustrade to the perimeter of the flat roof area to provide safe access for planned maintenance works

  Awaiting decision Full applications 17 docs

• Hampstead Hill Mansions Downshire Hill London NW3 1NY

  2026/3668/T Submitted 26 Aug 2026 0m away

  99% historically approved · decision due ~21 Oct

  REAR GARDEN: 1 x Cherry (T2) - Reduce dead stem by approx. 5m to suitable growth points. Reduce remaining stem down to approx5m to suitable growth points to balance crown and reduce wind loading on remaining stem. 1 x Willow (T4) - Reduce back old, historically damaged limb by 1m - 2m back from lawn. Overextended limb running along fence line reduce back by approx. 2m to reduce loading.

  Awaiting decision Trees 2 docs
  Small domestic

• 2026/0825/L Granted

  88 Frognal London NW3 6XB

  Discharge of condition 4 (a) Plan, elevation and section drawings of all new internal doors at a scale of 1:10 with typical moulding and architrave details at a scale of 1:1. b) Plan, elevation and section drawings, including jambs, head and cill, of all new windows and doors, including garage doors and windows, at a scale of 1:10 with typical glazing bar details at 1:1) of 2025/3436/L (External works comprising demolition of existing conservatory and erection of single-storey ground floor extension; demolition of existing garage and erection of replacement garage; alterations and repairs to roof; repair and minor alterations to building facade; provision of new hard and soft landscaping. Interior works comprising general remodelling works; minor changes to planform and openings; installation of new mechanical and electrical services throughout)

  2 Mar 2026 Heritage and listed buildings
• 2026/2946/L Awaiting decision

  Flat 1, 73 Eton Avenue London NW3 3EU

  Replacement of existing defective rear lean-to conservatory with a new slimline powder-coated aluminium framed conservatory with clear double glazing, on the exact same footprint as existing.

  3 Sep 2026 Heritage and listed buildings
• 2026/3754/L Awaiting decision

  10 Great Ormond Street London Camden WC1N 3RB

  Coversion of 3 flats into 4 and internal alterations to the listed building

  2 Sep 2026 Heritage and listed buildings
• 2026/2194/L Withdrawn

  Dunboyne Road Estate Dunboyne Road London NW3 2YY

  Installation of Air Source and Water Source Heat Pumps in basement car park with associated acoustic and security enclosures; installation of PV Panels on roof of Blocks 1, 2 and 3; removal of existing gas boilers and associated plant; installation of a new estate-wide heating network including Heat Interface Units, radiators, pipework and associated infrastructure to serve Flats 1-71; excavation of trenches and installation of below-ground heating, water and electrical infrastructure; and associated ancillary works.

  29 May 2026 Heritage and listed buildings
• 2026/3773/L Awaiting decision

  47 Kelly Street London NW1 8PG

  Replacement of concrete roof tiles with slate roof tiles (Retrospective)

  28 Aug 2026 Heritage and listed buildings