England · Postcode area SG3
Planning applications in SG3, North Hertfordshire
PlanningTrack collects these records from the public planning register of North Hertfordshire District Council. 75 applications with a postcode in SG3 were received in the last 12 months. Search an address, application reference or proposal, or open the North Hertfordshire planning applications page. Official North Hertfordshire website
- Registered26/02638/TCA
T1: Eucalyptus - Fell
The Conifers Gipsy Lane Knebworth Hertfordshire SG3 6DJ
Received 19 Oct 2026 - Registered26/02513/TCA
Eucalyptus - Remove.
The Conifers Gipsy Lane Knebworth Hertfordshire SG3 6DJ
Received 5 Oct 2026 - Registered26/02443/TCA
T1: Fir - Remove. T2: Fir - Remove branches overhanging driveway by 3-4m. Branches that face away reduce height by 3m
25a Deards End Lane Knebworth Hertfordshire SG3 6NL
Received 29 Sept 2026 - Awaiting decision26/02439/EC
The Electronic Communications Code (Conditions and restrictions) Regulations 2003 (as amended) Regulation 5 Notice of Intention to Install Fixed Line Broadband Apparatus: install cabling to exterior wall.
Park Gate House Park Lane Old Knebworth Knebworth Hertfordshire SG3 6QD
Received 29 Sept 2026 - Decided26/02332/TCA
R1: Robinia - Remove.
Larch House Old Knebworth Lane Knebworth Hertfordshire SG3 6FS
Received 16 Sept 2026 - Decided26/02149/FPH
Single storey rear and front extensions following demolition of existing rear element.
159 Park Lane Old Knebworth Knebworth Hertfordshire SG3 6PR
Received 10 Sept 2026 - Registered26/02257/FPH
Erection of detached double garage following demolition of existing detached garage
Holly House 8 Swangleys Lane Knebworth Hertfordshire SG3 6AA
Received 8 Sept 2026 - Decided26/02159/DOC
Details reserved by Condition 6 (Construction Method Statement) of outline planning permission reference 23/02946/OP granted on 18.06.2025.
66 Park Lane Knebworth Hertfordshire SG3 6PW
Received 8 Sept 2026 - Registered26/00261/FP
Change of use land and siting of 8 storage containers. (Development already carried out).
Nup End Industrial Estate Nup End Old Knebworth Knebworth Hertfordshire SG3 6QJ
Received 8 Sept 2026 - Decided26/02225/TCA
T1: Silver Birch - Reduce crown by around 30% (around 2-3m) to bring back into proportion and reduce wind and stress loading on the main stem connection.
45 Stockens Green Knebworth Hertfordshire SG3 6DQ
Received 7 Sept 2026 - Awaiting decision26/02039/FP
Erection of one detached three-bedroom dwelling including detached double garage with Air Source Heat Pump and soft and hard landscaping works following demolition of existing detached structures.
77 Park Lane Old Knebworth Knebworth Hertfordshire SG3 6PP
Received 3 Sept 2026 - Decided26/02210/NMA
External wall insulation and timber boarding added to east wall. Front door design updated, bi-fold doors changed to 6 doors and addiotnal rooflight added to landing outside bedroom 6 (as Non-Material Amendment to Planning Permission 26/00817/FPH granted 03.06.2026)
Larch House Old Knebworth Lane Knebworth Hertfordshire SG3 6FS
Received 2 Sept 2026 - Decided26/02001/FPH
Single storey infill side extension to link existing garage to dwelling. Insertion of dormer windows to existing front, rear and side roofslopes. Alterations to fenestration.
6 Gun Meadow Avenue Knebworth Hertfordshire SG3 6BS
Received 1 Sept 2026 - Registered26/01985/S73
Variation of conditions 1 and 14 (Revised Plans-Ecological Enhancements) of Reserved Matters application reference 25/01658/RM granted 28.11.2025 for reserved matters (appearance, landscaping, layout, scale and internal access) for the erection of 9 dwellings with associated landscaping, parking and amenity space pursuant of outline permission 23/02946/OP granted 19.06.2025.
66 Park Lane Knebworth Hertfordshire SG3 6PW
Received 27 Aug 2026 - Decided26/02081/FPH
Erection of two storey side extension following demolition of existing ground floor side extension
14 Deards End Lane Knebworth Hertfordshire SG3 6NL
Received 19 Aug 2026 - Decided26/02067/TPO
T1: Yew - Clear from path & reduce away from no 68. T2: Beech- Girdle ivy at 1.5m. T3: Oak - Remove 4x Elm, 3x Sycamore, 1x Norway Maple from under its crown & reduce lowest roadside limb that is resting in Sycamore by 2-3m & Second limb above Highway by 2-3m. T4, T5: Holly - Girdle ivy at 1.5m. T6: 4x Hornbeam- Reduce/re-pollard back to boundary. T7: Oak, 2x Sycamore - Remove from beneath Ash, Oak & Lime. T8: Philadelphus - Remove 2x ivy covered stems & 1x Ivy covered
57 Haygarth Knebworth Hertfordshire SG3 6HF
Received 18 Aug 2026 - Decided26/02058/TCA
T25: Pear - Remove
4 Deards End Lane Knebworth Hertfordshire SG3 6NL
Received 17 Aug 2026 - Decided26/02057/TCA
T1: Linden - Reduce by 1/3. T2: Sycamore - Remove. T10, T11: Sycamore - Remove. T12: Liquid Amber - Remove. T13: Elder - Remove.T16: Hawthorn - Remove. T17: Damson - Remove. T18: Silver Birch - Remove. T19: Apple - Remove. T20: Horse Chestnut - Reduce up to 1/3. T21: Oak - Reduce up to 1/3. T22: Horse Chestnut - Reduce up to 1/3. T23: Fir - Remove. T24: Hazel - Remove trunks.
6 Deards End Lane Knebworth Hertfordshire SG3 6NL
Received 17 Aug 2026 - Decided26/02051/TCA
2x Fir - Reduce in height by 3m removing the over hanging branches.
25a Deards End Lane Knebworth Hertfordshire SG3 6NL
Received 17 Aug 2026 - Registered26/02035/FP
Erection of building for church hall use including car parking, hard and soft landscaping, bin store and air source heat pump enclosure on south-west elevation. Alterations to existing vehicular access.
Land Adjacent To 67 Park Lane Knebworth Hertfordshire SG3 6PW
Received 13 Aug 2026 - Decided26/02012/DOC
Details reserved by condition 7 (Archaeological Written Scheme of Investigation) of reserved matters application reference no 25/01658/RM granted 28.11.2025.
66 Park Lane Knebworth Hertfordshire SG3 6PW
Received 10 Aug 2026 - Decided26/01837/FPH
Single storey rear extension. Alterations to existing garage including insertion of front window following removal of garage door and raising roof to facilitate garage conversion. Erection of open-sided front porch and pitched roof above existing front bay window.
78 London Road Knebworth Hertfordshire SG3 6HB
Received 6 Aug 2026 - Decided26/01964/FPH
Single storey rear extension following demolition of existing side/rear element.
57 Pondcroft Road Knebworth Hertfordshire SG3 6DE
Received 5 Aug 2026 - Decided26/01625/FPH
Enlargement of existing front dormer windows and insertion of 2 no. front rooflights. Insertion of rear box dormer with 2 no. Juliette balconies. Replacement flat roof above existing rear element and demolition of existing conservatory. Front porch extension and alterations to fenestration.
27 Lytton Fields Knebworth Hertfordshire SG3 6BA
Received 3 Aug 2026
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