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Planning application

20/2227/NMA

18 Bishops Avenue Northwood HA6 3DG

Granted Three Rivers Non Material Amendments

Proposal

Non-material amendment to planning application 19/2283/FUL: Alterations to position of rear dormer and fenestration to rear and eastern side elevation

As published by the council, reference 20/2227/NMA

Timeline

Dates from the published record

  1. 22 Oct 2020

    Received by Three Rivers

  2. 26 Oct 2020

    Validated

    Checked as complete and ready for consideration.

  3. 17 Nov 2020

    Decision issued: approved

  4. 30 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

  • 26/0658/FUL Granted

    22 Bishops Avenue Northwood HA6 3DG

    Demolition of existing garage and construction of part-single, part-two storey front extension; single storey side and rear extensions; garage conversion; construction of new roof with loft accommodation, with an increase in ridge height, rear dormer window, and front/side rooflights; alterations to fenestration including relocation of entrance door; front porch; and installation of windows to side elevation

    23 Apr 2026 38m away Full applications
  • 26/1181/FUL Awaiting decision

    11 The Roughs Northwood HA6 3DE

    Removal of existing outbuildings and construction of an annexe

    21 Jul 2026 45m away Full applications
  • 26/0590/FUL Granted

    12 The Roughs Northwood HA6 3DF

    Demolition of existing garage, sheds and conservatory and construction of single storey side and rear extension; replacement roof, loft conversion including front/rear dormers and front/side rooflights, rear patio

    14 Apr 2026 63m away Full applications
  • 25/1297/TPO Refused

    9 The Roughs Northwood HA6 3DE

    T1 - Oak x 1 - reduce by 2m on height and 3m on overall spread, this will leave the tree at around 21 m in height with an approximate crown spread of 5-6 m. T2 - Oak x 1 - reduce by 2m on height and 2m on overall spread (as T1 above) T3 - Oak x 1 - reduce by 1-1.5m on height to clear dieback, prune back the south and east sides by around 1.5 m to leave these sections at about 2.5 m in length and so create a reasonably symmetrical crown. Reasons: trees 1 & 2 are woodland/field species rather than garden trees and these are now becoming somewhat large for this suburban location, Mr Ellis also has some concerns because the property is located within an area that has a shrinkable superficial site geology. Tree 3 is suppressed by the former two trees and as a result has developed a very asymmetrical crown with appreciable deadwood at the higher levels.

    31 Jul 2025 76m away Trees
  • 22/0685/FUL Granted

    8 Bishops Avenue Northwood Hertfordshire HA6 3DG

    Demolition of single storey garage, utility and store and construction of two storey side extension, two storey and single storey rear extensions, roof alterations including extension and increase in ridge height, crown roof form and accommodation within roof served by rooflights and patio to rear

    11 Apr 2022 84m away Full applications
  • 25/1326/CLED Granted

    5 The Roughs Northwood HA6 3DE

    Certificate of Lawfulness Existing Use: Conversion of garage into habitable accommodation

    5 Aug 2025 93m away Lawful development

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