49 St Marys Avenue Northwood HA6 3AY

1. 30 Jun 2025

   Received by Three Rivers

2. 19 Aug 2025

   Decision issued: approved

3. 24 Jul 2026

   Added to PlanIndex

Three Rivers granted permission on 19 August 2025, 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 amendment application makes limited changes to a permission that already exists; anything beyond modest adjustment needs a fresh application. More in our guide to planning application types.

• 45 St Marys Avenue Northwood HA6 3AY

  19/2452/DDD Submitted 18 Dec 2019 50 yards away

  Oak - Reduce Crown

  Granted Trees 2 docs

• 35 St Marys Avenue Northwood HA6 3AY

  21/0992/FUL Submitted 19 Apr 2021 100 yards away

  Single storey rear extension, part single, part two storey side extension and alterations to garage roof

  Granted Full applications Extension 13 docs
  Small domestic

• 40 Sandy Lodge Way Northwood HA6 2AS

  24/0403/FUL Submitted 14 Mar 2024 100 yards away

  Demolition of existing single storey rear extension and construction of part single, part two storey rear extension with Juliet balconies, first floor side extension, single storey front and side extensions and loft conversion including side dormer, windows to front and rear and side rooflights, conversion of garage and alterations to fenestration

  Granted Full applications Extension Loft or dormer +2 28 docs
  Small domestic

• 40 Sandy Lodge Way Northwood HA6 2AS

  24/0180/PDE Submitted 6 Feb 2024 100 yards away

  Prior Approval: Single storey rear extension (depth 6 metres, maximum height 3 metres, maximum eaves height 3 metres)

  Granted Outline Extension 16 docs
  Small domestic

• 33 St Marys Avenue Northwood HA6 3AY

  20/2153/PDE Submitted 12 Oct 2020 150 yards away

  Prior Approval: Single storey rear extension (depth 8 metres, maximum height 3.90metres, maximum eaves height 2.80 metres)

  Granted Outline Extension 5 docs
  Small domestic

• 33 St Marys Avenue Northwood HA6 3AY

  21/0897/FUL Submitted 8 Apr 2021 150 yards away

  Construction of ground floor front bay window matching first floor

  Granted Full applications Windows or glazing 8 docs

• 26/1699/NMA Awaiting decision

  Ardmore 87 Lower Road Chorleywood Rickmansworth Hertfordshire WD3 5LA

  Non-material amendment pursuant to planning permission 25/0606/RSP to allow alterations to decking area

  Received 27 Oct, published by the council 28 Oct 2026 Amendments
• 26/1670/NMA Awaiting decision

  Maple Cross House, Denham Way And Kier Offices Off Maple Lodge Close, Maple Cross Rickmansworth Hertfordshire WD3 9SW

  Non-Material Amendments pursuant to planning permission 24/1963/FUL to allow the relocation of two trees

  Received 21 Oct, published by the council 22 Oct 2026 Amendments
• 26/1657/NMA Awaiting decision

  123 High Street Rickmansworth Hertfordshire WD3 1AN

  Non-Material Amendments to planning permission 26/1091/FUL to allow alteration to design of combined defibrillator and bleed kit cabinet.

  Received 19 Oct, published by the council 20 Oct 2026 Amendments
• 26/1621/NMA Awaiting decision

  115 Windmill Drive Croxley Green Rickmansworth Hertfordshire WD3 3FB

  Non Material Amendments to planning permission 24/1770/AOD to allow alterations to the fenestration

  Received 12 Oct, published by the council 30 Oct 2026 Amendments
• 26/1580/NMA Decided

  12 Fulford Grove South Oxhey Watford Hertfordshire WD19 7QG

  Non-Material Amendments to planning permission 26/0703/FUL to allow the approved bunker to change location

  5 Oct 2026 Amendments