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Planning application

20/1896/FUL

23 Copthorne Road Croxley Green WD3 4AB

Granted Three Rivers Full Application

Proposal

Ground and lower ground floor side and rear extension, loft conversion including insertion of rear dormer window, alterations to fenestration and alterations to existing rear terrace.

As published by the council, reference 20/1896/FUL

Timeline

Dates from the published record

  1. 14 Sep 2020

    Received by Three Rivers

  2. 18 Sep 2020

    Validated

    Checked as complete and ready for consideration.

  3. 13 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 full applications applications

How this application type works

A full application seeks permission for a complete, detailed proposal in one go: siting, design, access and landscaping are all fixed at this stage. It is the standard route for new buildings, conversions and changes of use. The statutory target is eight weeks for smaller schemes and thirteen weeks for major development, though complex cases often take longer by agreement.

More on full applications applications in our guide

Nearby applications

Within 500 metres

  • 24/0007/TPO Granted

    27 Copthorne Road Croxley Green Rickmansworth Hertfordshire WD3 4AB

    Cypress (T90). This tree has grown to such an extent that it poses a risk to the property Flat 27a. In the recent high winds the tree has continually hit Flat 27a and this has dislodged the haunching of the concrete tiled roof. The tree is of such a height and spread that it could cause further significant damage should it deflect sufficiently or part of it fall. Proposed work: Whole crown reduction to 13m above ground level, to provide sufficient clearance to property.

    3 Jan 2024 31m away Trees
  • 26/0763/FUL Granted

    13 Copthorne Road Croxley Green Rickmansworth Hertfordshire WD3 4AB

    Construction of outbuilding with veranda to rear garden.

    12 May 2026 122m away Full applications
  • 26/0678/FUL Granted

    16A Copthorne Road Croxley Green Rickmansworth Hertfordshire WD3 4AE

    Demolition of existing garage and outbuilding, construction of two storey front and side extensions; single storey side and rear extensions; omission of rear balconies and replacement with rear juliet balconies, internal alterations and alterations to fenestration; alterations to driveway; extension of rear patio area; alteration of external materials including render and cladding; alteration of front entrance

    27 Apr 2026 170m away Full applications
  • 22/1016/DIS Decided

    The Windmill 34 Windmill Drive Croxley Green Rickmansworth Hertfordshire WD3 3FD

    Discharge of Condition 4 (Archaeology) and Condition 5 (Landscape Management) pursuant to planning permission 21/0531/FUL

    20 May 2022 174m away Conditions
  • 26/0876/FUL Refused

    58 Windmill Drive Croxley Green Rickmansworth Hertfordshire WD3 3FE

    Change of use of existing amenity verge to residential curtilage to facilitate construction of two-storey side extension with front dormer; demolition of existing flank boundary wall and erection of new fence to extend private rear garden; removal of existing trees; new side pathway, landscaping and tree planting; new pitched roofs to existing front dormers; new pitched roof to front porch; conversion of garage into habitable accommodation; and extension to front driveway.

    28 May 2026 197m away Full applications
  • 24/0111/FUL Granted

    28 Windmill Drive Croxley Green Rickmansworth Hertfordshire WD3 3FD

    Conversion of garage into habitable accommodation and construction of single storey front and rear extension; insulation and roofing to existing single storey rear extension.

    25 Jan 2024 215m away Full applications

In Three Rivers

  • 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 Full applications
  • 26/0889/FUL Granted

    Clovelly Bell Lane Bedmond Abbots Langley Hertfordshire WD5 0QS

    Demolition of existing conservatory and construction of single storey rear extension with pergola, rear patio, and sedum roof, solar panels and rooflights; alterations to side fenestration; alteration to external materials of front elevation including render

    1 Jun 2026 Full applications
  • 26/0816/FUL Granted

    25 Beacon Way Rickmansworth Hertfordshire WD3 7PF

    Loft conversion including increase in ridge height with rear dormer and front/side rooflights

    19 May 2026 Full applications
  • 26/1015/FUL Granted

    32 Tudor Manor Gardens Garston Watford Hertfordshire WD25 9TQ

    Variation of Condition 2 (Plans) pursuant to planning permission 25/1939/FUL to allow a reduction to the first floor extension; associated alterations to the fenestration.

    22 Jun 2026 Full applications
  • 26/1196/FUL Awaiting decision

    22 Main Avenue Moor Park Northwood Hertfordshire HA6 2HJ

    Construction of two outbuildings to rear of shop.

    27 Jul 2026 Full applications