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Planning application

25/1115/RSP

49 St Marys Avenue Northwood HA6 3AY

Granted Three Rivers Retrospective application

Proposal

Part retrospective: Demolition of existing conservatory and construction of single storey rear extension

As published by the council, reference 25/1115/RSP

Timeline

Dates from the published record

  1. 30 Jun 2025

    Received by Three Rivers

  2. 19 Aug 2025

    Decision issued: approved

  3. 24 Jul 2026

    Added to PlanIndex

What a grant of permission means

The process from here

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.

About amendments applications

How this application type works

An amendment application changes a permission that already exists. Non-material amendments cover small adjustments with no wider effect, while minor material amendments, usually made by varying a condition, allow modest design changes without a fresh application. Anything beyond that needs a new permission, so the scope here is deliberately narrow.

More on amendments applications in our guide

Nearby applications

Within 500 metres

  • 26/0935/FUL Granted

    53 St Marys Avenue Northwood HA6 3AY

    Construction of single storey rear extension with roof lantern, installation of window to side elevation

    8 Jun 2026 30m away Full applications
  • 24/0180/PDE Granted

    40 Sandy Lodge Way Northwood HA6 2AS

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

    6 Feb 2024 110m away Outline
  • 20/1811/FUL Granted

    42 Sandy Lodge Way Northwood HA6 2AS

    Single storey front porch extension

    2 Sep 2020 115m away Full applications
  • 20/1815/PDE Granted

    42 Sandy Lodge Way Northwood HA6 2AS

    Prior Approval: Single storey rear extension (depth 6m, maximum height 4 metres, maximum eaves height 2.90 metres)

    2 Sep 2020 117m away Outline
  • 23/2027/FUL Granted

    31 St Marys Avenue Northwood HA6 3AY

    Demolition of existing store and construction of single storey rear extension and pergola.

    29 Nov 2023 124m away Full applications
  • 26/1132/FUL Awaiting decision

    20 Batchworth Lane Northwood HA6 3DR

    Substantial demolition of existing dwelling; two storey and single storey front, side and rear extensions; construction of a front bay window; alterations to the front projection; removal of existing roof and construction of new roof form including side and rear dormer windows, front rooflights; alterations to fenestration and materials; internal alterations

    13 Jul 2026 188m away Full applications

In Three Rivers

  • 26/1089/NMA Granted

    Warner Bros. Studios Leavesden Warner Drive Watford Hertfordshire WD25 7LP

    Non-material amendment pursuant to planning permission 25/1308/FUL to allow alterations to Building 18 including alterations to fenestration detail, new canopy element and provision of a mezzanine level.

    7 Jul 2026 Amendments
  • 26/1062/NMA Granted

    24 Lynwood Heights Rickmansworth Hertfordshire WD3 4ED

    Non Material Amendments to planning permission 24/1799/RSP to allow alterations to the fenestration and render including change in exterior colour.

    1 Jul 2026 Amendments
  • 26/0845/RSP Granted

    Keepers Cottage Solesbridge Lane Chorleywood Rickmansworth Hertfordshire WD3 5SU

    Part-Retrospective: Change of use of land for the stationing of caravans for residential purposes.

    26 May 2026 Amendments
  • 25/0488/RSP Granted

    Scotsbridge House Scots Hill Croxley Green Rickmansworth Hertfordshire WD3 3BB

    Part Retrospective: Demolition of offices and erection of new development of 59 flats with associated parking and external landscaping

    19 Mar 2025 Amendments
  • 26/1189/RSP Awaiting decision

    30 Hillcroft Crescent Oxhey Hall Watford Hertfordshire WD19 4NY

    Retrospective Application: single storey rear extension

    23 Jul 2026 Amendments