Planning authority · 2026
Three Rivers planning applications 2026
1,178 public planning records from 2026 in the production OGL dataset, newest first, linked to council source pages.
Applications
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Three Rivers/25/2135/TPO
75 The Drive Rickmansworth Hertfordshire WD3 4DY
G51. Hazel, Laburnum and Cherry. Pruning where they overhang the pavement to the property boundary line.G52 Norway Maple pruning to the boundary fenceT178 Silver Birch pruning and shaping a...
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Three Rivers/25/2143/FUL
Little Hensol Shire Lane Chorleywood Rickmansworth Hertfordshire WD3 5NH
Demolition of existing single storey side extension, garage, conservatory and construction of part single, part-two storey side extension, single storey rear extension with rooflights
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Three Rivers/25/2172/TCA
Oak Tree House 5 Seven Acres Northwood HA6 3JZ
T1 Leyland Cypress - FellGroup G1 (5x Leyland Cypress) - Fell
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Three Rivers/25/2173/TPO
Cherry Hill Cottage Trout Rise Loudwater Rickmansworth Hertfordshire WD3 4JR
T1 English Oak - Reduce lateral overhang back from neighbouring property by 2.5m.T2 English Oak - Reduce lateral overhang back from neighbouring property. Crown reduce 2.5m. Ivy management....
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Three Rivers/25/2198/CLPD
29 Dickinson Avenue Croxley Green Rickmansworth Hertfordshire WD3 3EU
Certificate of Lawfulness Proposed Development: Loft conversion including rear dormer and front rooflights
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Three Rivers/25/2227/PDE
196 Muirfield Road South Oxhey Watford Hertfordshire WD19 6BJ
Prior Approval: Single storey rear extension (depth 4.50 metres, maximum height 3.30 metres, maximum eaves height 3.00 metres)
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Three Rivers/25/1869/FUL
Invergarry 33 Astons Road Moor Park Northwood Hertfordshire HA6 2LB
Demolition of existing conservatory and construction of part single, part two storey rear extension with roof accommodation served by Juliet dormer windows; rear terrace balcony; garage con...
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Three Rivers/25/2008/FUL
Trelawny 1 Ardross Avenue Northwood HA6 3DS
Construction of first floor rear extension, partial conversion of existing garage into habitable accommodation and alterations to fenestration detail.
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Three Rivers/25/2013/FUL
193 - 203 High Street Rickmansworth Hertfordshire WD3 1BB
Replacement of external gas cooler, 2no. AC condenser units and 2no. new fridge packs at roof level.
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Three Rivers/25/2098/FUL
18 Brushwood Drive Chorleywood Rickmansworth Hertfordshire WD3 5RT
Construction of first-floor rear extension and lower ground floor rear extension, alterations to raised rear patio including replacement of decking, glass balustrading and stairs, alteratio...
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Three Rivers/25/2118/FUL
20A Copthorne Road Croxley Green Rickmansworth Hertfordshire WD3 4AQ
Replacement doors and windows, and alterations to front bay window.
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Three Rivers/25/2137/FUL
193 - 203 High Street Rickmansworth Hertfordshire WD3 1BB
Variation of Condition 2 (opening hours) to planning permission 13/1376/FUL to allow alterations to opening hours in December 2026
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Three Rivers/25/2138/CLPD
42 Claremont Crescent Croxley Green Rickmansworth Hertfordshire WD3 3QR
Certificate of Lawfulness Proposed Development: Loft conversion including hip to gable roof extension with rear juliet dormer and front rooflights, erection of front porch
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Three Rivers/25/2139/CLPD
10 Margeholes Carpenders Park Watford Hertfordshire WD19 5AP
Certificate of Lawfulness Proposed Development: Demolition of existing garage and canopy and construction of single storey rear extension
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Three Rivers/26/0017/NMA
Wolsey Business Park Tolpits Lane Watford Hertfordshire WD18 9BL
Non-material amendment pursuant to planning permission 24/1137/FUL to allow removal of 2no. trees, addition of UKPN substation, combination of 2no. substations towards eastern part of site,...
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Three Rivers/24/2073/OUT
Land To North Of Little Green Lane Croxley Green WD3 3SP
Outline Application: Development of up to 600 residential dwellings (Use Class C3(a)), construction of a 5-bedroom property for childrens social care and supported living (Use Class C3(b))....
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Three Rivers/25/1782/RSP
Wendover Bridle Lane Loudwater Rickmansworth Hertfordshire WD3 4JH
Retrospective: Erection of an outbuilding
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Three Rivers/25/2107/PDNA
New Model Farm Sarratt Road Rickmansworth Hertfordshire WD3 6AJ
Prior Notification: Erection of agricultural barn with solar panels
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Three Rivers/25/2112/CLPD
50 Harthall Lane Kings Langley Hertfordshire WD4 8JH
Certificate of Lawfulness Proposed Development : Stationing of a caravan for ancillary residential use
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Three Rivers/26/0151/FUL
Warner Bros. Studios Leavesden Warner Drive Watford Hertfordshire WD25 7LP
Removal of condition 13 (M25 Junction 21a Improvements) of planning permission 25/1308/FUL
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Three Rivers/25/1945/FUL
Up Yonder 76 Valley Road Rickmansworth Hertfordshire WD3 4BJ
Substantial demolition of existing dwelling, including construction of part-single, part-two storey front extension; single storey rear extension; loft conversion including replacement roof...
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Three Rivers/25/2114/DIS
Lane End 6 Sandy Lodge Road Moor Park Rickmansworth Hertfordshire WD3 1LJ
Discharge of Condition 3 (Demolition and Construction Method Statement) and Condition 4 (Materials) pursuant to planning permission 23/0564/FUL
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Three Rivers/25/2117/CLPD
20 Batchworth Lane Northwood HA6 3DR
Certificate of Lawfulness Proposed Development: Construction of an outbuilding
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Three Rivers/25/2134/FUL
174 Harrow Way Carpenders Park Watford Hertfordshire WD19 5ER
Construction of single storey rear infill extension
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Three Rivers/26/0114/NMA
Warner Bros. Studios Leavesden Warner Drive Watford Hertfordshire WD25 7LP
Non-Material Amendment to Condition 2 (Plans) of planning permission 25/1308/FUL to allow correction to plan numbers.
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Three Rivers/25/0195/FUL
80 The Drive Rickmansworth Hertfordshire WD3 4DU
Demolition of existing dwelling and construction detached building containing 5 residential flats, with associated landscaping, provision of new vehicular access, car parking, cycle and ref...
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Three Rivers/25/1948/DIS
Cottage Farm Redhall Lane Chandlers Cross Rickmansworth Hertfordshire WD3 4LT
Discharge of Condition 5 (Contamination - Preliminary Risk Assessment) pursuant to planning permission 24/1950/FUL
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Three Rivers/25/1969/ADV
19 Church Street Rickmansworth Hertfordshire WD3 1DE
Advertisement Consent: Installation of 2no. fascia signs and 2no. projecting signs to the front elevation.
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Three Rivers/25/2032/RSP
5 Popes Road Abbots Langley Hertfordshire WD5 0EY
Part Retrospective: Roof replacement; construction of single storey side and rear extension and first floor rear infill extension, with associated internal alterations, new windows to side...
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Three Rivers/25/2069/FUL
31 Yorke Road Croxley Green Rickmansworth Hertfordshire WD3 3DW
Demolition of existing rear extensions and outbuilding and construction of part single-storey, part two-storey rear, side and front extensions, associated rear patio, alterations to fenestr...
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Three Rivers/25/2089/FUL
130 Valley Road Rickmansworth Hertfordshire WD3 4BP
Construction of part single, part two-storey rear extension, rear patio extension, front portico, alterations to fenestration, alterations to external materials, and internal alterations
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Three Rivers/25/2126/FUL
74 Eastwick Crescent Mill End Rickmansworth Hertfordshire WD3 8YJ
Demolition of existing conservatory and construction of single storey side and rear extension
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Three Rivers/25/2194/PDE
87 Hayling Road South Oxhey Watford Hertfordshire WD19 7DP
Prior Approval: Single storey rear extension (depth 4.30 metres, maximum height 3.00 metres, maximum eaves height 2.90 metres)
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Three Rivers/25/1824/TPO
10 Grovewood Close Chorleywood Rickmansworth Hertfordshire WD3 5PU
T1 - Oak Tree - applying for an annual prune due to intruding over neighbouring property and to maintain substantial health for the tree 2-3 metres reduction T3 - Beech Tree - Cut back over...
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Three Rivers/25/1916/TPO
Highwood Copthorne Road Croxley Green Rickmansworth Hertfordshire WD3 4AE
T1 - Sycamore - Crown reduction of 2.5-3.5 metres vertically and 1.5-2.5 laterally to bring back to growth points outside previous reduction points - to maintain the tree at a reasonable si...
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Three Rivers/25/1967/FUL
Parkview Bucknalls Close Garston Hertfordshire
Construction of three-storey extension to existing building to increase provision of internal space to 30 existing flats.
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Three Rivers/25/1973/FUL
168 Highfield Way Rickmansworth Hertfordshire WD3 7PJ
Removal of the existing roof and construction of an additional storey to create a two-storey dwelling with loft accommodation served by rear dormer and front/rear roof lights; front solar p...
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Three Rivers/25/1994/FUL
Tamahine The Green Croxley Green Rickmansworth Hertfordshire WD3 3HX
Demolition of existing store rooms and single storey rear extension; erection of a part single, part two storey side and rear extension including new roof; internal alterations and alterati...
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Three Rivers/25/2025/FUL
37 Penrose Avenue Carpenders Park Watford Hertfordshire WD19 5AD
Demolition of existing conservatory and shed, alterations to existing single storey rear projection including new roof, conversion of garage into habitable accommodation with associated sin...
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Three Rivers/25/2068/CLPD
31 Yorke Road Croxley Green Rickmansworth Hertfordshire WD3 3DW
Certificate of Lawfulness Proposed Development: Loft conversion including hip-to-gable roof extension, rear dormer with Juliet balcony, front rooflights and flank windows
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Three Rivers/25/2104/CLPD
Sundial Cottage The Green Croxley Green Rickmansworth Hertfordshire WD3 3HT
Certificate of Lawfulness Proposed Development: Construction of a swimming pool in the rear garden
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Three Rivers/25/2130/TCA
33 Sandy Lodge Road Moor Park Rickmansworth Hertfordshire WD3 1LP
TG2 Sycamore Maple x3 group Goals:? Reduce spread of crown? Provide of clearance to property 31 sandy lodge road? Reduce and/or remove live, interfering, over-extended branches as needed, 3...
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Three Rivers/25/2132/CLPD
42 Margeholes Carpenders Park Watford Hertfordshire WD19 5AR
Certificate of Lawfulness Proposed Development: Demolition of existing conservatory and construction of single storey rear extension
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Three Rivers/25/2157/TPO
Overbury Woodside Walk Northwood HA6 3ET
G1 - Holly - Self-seeded trees that are growing close to the boundary with Holly Manor (see photograph 1)Works: RemoveT1 - Oak x 1 - (third-party) Tree one is an oak tree that is significan...
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Three Rivers/25/2207/PDE
12 Margeholes Carpenders Park Watford Hertfordshire WD19 5AP
Prior Approval: Single storey rear extension (depth 6.00 metres, maximum height 3.27 metres, maximum eaves height 3.00 metres)
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Three Rivers/26/0013/TPO
Holmoak 31 Sandy Lodge Road Moor Park Rickmansworth Hertfordshire WD3 1LP
T1 ? Holm oakTree currently oversized for the site and in close proximity to buildings (approx. 14m crown spread).Proposed works: reduce the crown by 2 to 2.5 metres, cutting back to the ol...
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Three Rivers/25/1902/FUL
Magnolias Donkey Gate Solesbridge Lane Chorleywood Rickmansworth Hertfordshire WD3 5SN
Loft conversion including rear juliet dormer with window and front rooflights
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Three Rivers/25/1912/DIS
No.3 To No.6 Wolsey Business Park Tolpits Lane Watford Hertfordshire WD18 9BL
Discharge of Condition 11(Environmental Assessment and Remediation and Verification Strategy) pursuant to planning permission 24/1137/FUL
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Three Rivers/25/2043/DIS
20 High Street Rickmansworth Hertfordshire WD3 1ER
Discharge of Condition 3 (Material Details) pursuant to planning permission 25/0912/FUL and 25/1019/LBC
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Three Rivers/25/2058/LBC
Bucks Hill Bottom Cottage Bucks Hill Kings Langley Hertfordshire WD4 9AE
Listed Building Consent: Construction of single storey side conservatory and insertion of rooflights.
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Three Rivers/25/2208/PDE
36 Fotherley Road Mill End Rickmansworth Hertfordshire WD3 8QG
Prior Approval: Single storey rear extension (depth 4.00 metres, maximum height 3.43 metres, maximum eaves height 2.55 metres)
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Three Rivers/25/2238/NMA
49 St Marys Avenue Northwood HA6 3AY
Non-material amendment pursuant to planning permission 25/1115/RSP to allow replacement of rooflight with a lantern rooflight to single storey rear extension
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Three Rivers/25/1842/FUL
White Roses London Road Rickmansworth Hertfordshire WD3 1JR
Demolition of existing detached garage and construction of single storey detached garage
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Three Rivers/25/2019/FUL
Thatches Loudwater Lane Loudwater Rickmansworth Hertfordshire WD3 4HY
Variation of Condition 2 (plans) pursuant to planning permission 22/0595/FUL to allow alterations to fenestration
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Three Rivers/25/2174/PAC
The Mulberry Bush Dawes Lane Sarratt Rickmansworth Hertfordshire WD3 6BQ
Prior Notification: Use of part of The Mulberry Bush Farm for the purposes of camping in the calendar year of 2026 (no more than 60 days in total)
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Three Rivers/26/0050/FUL
Land Adjacent Berry Farm Berry Lane Chorleywood WD3 5EU
Demolition of existing buildings and structures and construction of single storey detached dwelling with associated vehicle access, parking, and landscaping.
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Three Rivers/25/2042/RSP
38 Gallows Hill Lane Abbots Langley Hertfordshire WD5 0DA
Variation of Condition 2 (Plans) pursuant to planning permission 21/2745/FUL to allow additional ground floor flank window and alterations to rear doors
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Three Rivers/25/2060/CLPD
142 Highfield Way Rickmansworth Hertfordshire WD3 7PJ
Certificate of Lawfulness Proposed Development: Demolition of existing sheds and construction of an outbuilding
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Three Rivers/25/2065/FUL
24 Beresford Road Mill End Rickmansworth Hertfordshire WD3 8QU
Demolition of existing storage shed and conservatory and construction of two storey side extension and single storey rear extension; removal of chimney breasts, external materials including...
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Three Rivers/25/2066/RSP
4 Rushmoor Close Rickmansworth Hertfordshire WD3 1NA
Retrospective: Erection of front porch extension