Postcode area
Planning applications in SG3
12 planning applications were submitted in the SG3 postcode area in the last 30 days. The most common type was extensions (3).
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12 most recent applications
- 26/02332/TCA16 Sep 2026Undecided
Larch House Old Knebworth Lane Knebworth Hertfordshire SG3 6FS
R1: Robinia - Remove.
- 26/02149/FPH10 Sep 2026Undecided
159 Park Lane Old Knebworth Knebworth Hertfordshire SG3 6PR
Single storey rear and front extensions following demolition of existing rear element.
- 26/02159/DOC8 Sep 2026Undecided
66 Park Lane Knebworth Hertfordshire SG3 6PW
Details reserved by Condition 6 (Construction Method Statement) of outline planning permission reference 23/02946/OP granted on 18.06.2025.
- 26/02257/FPH8 Sep 2026Undecided
Holly House 8 Swangleys Lane Knebworth Hertfordshire SG3 6AA
Erection of detached double garage following demolition of existing detached garage
- 26/00261/FP8 Sep 2026Undecided
Nup End Industrial Estate Nup End Old Knebworth Knebworth Hertfordshire SG3 6QJ
Change of use land and siting of 8 storage containers. (Development already carried out).
- 26/02225/TCA7 Sep 2026Undecided
45 Stockens Green Knebworth Hertfordshire SG3 6DQ
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.
- 26/02039/FP3 Sep 2026Undecided
77 Park Lane Old Knebworth Knebworth Hertfordshire SG3 6PP
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.
- 26/02210/NMA2 Sep 2026Undecided
Larch House Old Knebworth Lane Knebworth Hertfordshire SG3 6FS
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)
- 26/02001/FPH1 Sep 2026Undecided
6 Gun Meadow Avenue Knebworth Hertfordshire SG3 6BS
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.
- 3/26/1207/HH28 Aug 2026Undecided
1 Raffin Park Datchworth Hertfordshire SG3 6RR
Demolition of existing side extension and construction of replacement two storey side extension. Alterations to openings and new windows. Replacement cladding, render, brickwork and roof tiles. Widening of driveway.
- 3/26/1192/HH27 Aug 2026Undecided
Monttaber Bragbury Lane Datchworth Hertfordshire SG3 6QZ
Demolition of garage, side and rear brick structure, raising of roof and roof alterations to provide additional accommodation to first floor, erection of two-storey rear and side extension, ground floor side extension with attached garage and storage room, first floor rear balcony, roof lights to front and rear. Garden patio with outdoor kitchen with pergola. Erection of front gates and landscaped brick wall to front entrance
- 26/01985/S7327 Aug 2026Undecided
66 Park Lane Knebworth Hertfordshire SG3 6PW
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.