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Planning ApplicationsKnebworth Parish Council

Knebworth Parish Council Planning Applications

120 planning applications in the Knebworth area — 17 currently pending, 29 approved.

Planning Signal monitors all planning applications submitted to the relevant district council for the Knebworth area. Track planning permission decisions and get free email alerts for new applications.

120
Total applications
17
Pending
29
Approved

Recent Planning Applications in Knebworth

UndecidedFull

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

6 Aug 2026

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UndecidedFull

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

3 Aug 2026

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UndecidedFull

Single storey side and rear extensions with car port following removal of existing detached rear garage and shed.

76 Pondcroft Road Knebworth Hertfordshire SG3 6DE

6 Jul 2026

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UndecidedFull

Single storey rear extension following demolition of existing conservatory

27 Stockens Green Knebworth Hertfordshire SG3 6DQ

29 Apr 2026

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UndecidedTrees

2 x Hornbeam - Reduce by 3.5m height

2 Church Gardens Stevenage Road Knebworth Hertfordshire SG3 6AR

17 Apr 2026

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UndecidedFull

Installation of front brick wall including brick piers, coping stones, metal railings, and vehicular access gate following removal of existing timber picket fence and vehicular gate.

12 Stevenage Road Knebworth Hertfordshire SG3 6AW

14 Apr 2026

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UndecidedOutline

Insertion of side dormer to facilitate loft conversion

35 Hornbeam Spring Knebworth Hertfordshire SG3 6AY

8 Apr 2026

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UndecidedFull

Erection of two storey side extension following demolition of existing ground floor side extension

14 Deards End Lane Knebworth Hertfordshire SG3 6NL

2 Apr 2026

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UndecidedFull

Single storey rear extension.

53 Orchard Way Knebworth Hertfordshire SG3 6BT

1 Apr 2026

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UndecidedFull

Insertion of front bay window following removal of existing garage doors to facilitate garage conversion into habitable accommodation. Front entrance porch and installation of side canopy. Insertion of rooflights to existing rear element roofslope. Alterations to fenestration. Erection of boundary wall/railings and installation of entrance gates.

Larch House Old Knebworth Lane Knebworth Hertfordshire SG3 6FS

27 Mar 2026

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ConditionsFull

Two storey rear extension with Juliet balcony, front porch and addition of pitched roof to existing garage and replace garage door with a window to facilitate conversion of garage into habitable accommodation following removal of existing porch. (renewal of previously approved planning permission 22/01469/FPH granted 26.07.2022)

80 London Road Knebworth Hertfordshire SG3 6HB

16 Mar 2026

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RejectedOutline

Single storey rear extension

53 Orchard Way Knebworth Hertfordshire SG3 6BT

12 Mar 2026

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PermittedTrees

T1: Oak - 2 -3 m Reduction (approx 30%). T2: Ash - Crown tidy and deadwood removal

12 Deards End Lane Knebworth Hertfordshire SG3 6NL

10 Mar 2026

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UndecidedFull

Erection of one self-build dwelling including ancillary annexe following demolition of existing dwelling to including parking, hard and soft landscaping and installation of rear swimming pool.

Annexe At Cuckoo Hall 73 Park Lane Old Knebworth Hertfordshire SG3 6PP

27 Feb 2026

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UndecidedAmendment

Front boundary brick wall and installation of gate and fencing.

12 Stevenage Road Knebworth Hertfordshire SG3 6AW

25 Feb 2026

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UndecidedFull

Single storey rear extension following demolition of existing conservatory. Insertion of front and rear ground floor window following removal of existing garage doors and roller shutter to facilitate conversion of garage into habitable accommodation.

31 Gun Road Gardens Knebworth Hertfordshire SG3 6ED

9 Feb 2026

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PermittedAmendment

Insertion of utility room rooflight (as Non-Material Amendment to planning permission 25/02928/FPH granted 08.01.2026).

32 Stockens Dell Knebworth Hertfordshire SG3 6BG

9 Feb 2026

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ConditionsFull

Two storey side extension, single storey rear extension with lantern skylights, and installation of front porch canopy. Replacement pitched roof over existing attached garage. Alterations to fenestration and hardscaping works.

31 Stevenage Road Knebworth Hertfordshire SG3 6NN

27 Jan 2026

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ConditionsFull

First floor side extension above existing garage and part two storey side extension. Front porch extension and insertion of front ground floor window following removal of existing garage doors to facilitate garage conversion. Alterations to fenestration. Erection of detached garage.

6 Deeping Close Knebworth Hertfordshire SG3 6BW

26 Jan 2026

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UndecidedConditions

Details reserved by Condition 4 (Noise Assessment) of planning permission 25/00255/FP granted 25.4.2025.

150-152 London Road Knebworth Hertfordshire SG3 6EY

15 Jan 2026

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ConditionsFull

Erection of detached double garage with office in roof space and installation solar panels following demolition of existing garage.

15 Deards End Lane Knebworth Hertfordshire SG3 6NL

9 Jan 2026

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ConditionsFull

Replacement raised roof including 2.no front dormer windows, 2.no front rooflights windows and 1.no rear dormer window. Single storey rear extension following removal of existing conservatory. Alterations to fenestration including insertion of garage door on front elevation

27 Lytton Fields Knebworth Hertfordshire SG3 6BA

2 Jan 2026

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RejectedFull

Installation of 2 motorised entry and exit timber gates.

15 Deards End Lane Knebworth Hertfordshire SG3 6NL

15 Dec 2025

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ConditionsFull

Single storey rear extension following partial demolition of existing rear element and removal of existing lean-to, outbuildings, and chimney

3 Swangleys Lane Knebworth Hertfordshire SG3 6AA

10 Dec 2025

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ConditionsAdvertising

Installation of 1 no. internally illuminated fascia sign and 1 no. internally illuminated projection sign. (Development already carried out)

148 - 150 London Road Knebworth Hertfordshire SG3 6EY

10 Dec 2025

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ConditionsFull

Single store rear extension following demolition of existing rear extension. Rear box dormer and 3 front roof lights to facilitate conversion of loft into habitable accommodation.

9 Watton Road Knebworth Hertfordshire SG3 6AH

14 Nov 2025

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ConditionsFull

Part two storey and part single storey rear extension. Insertion of one front rooflight and one first floor side window

1 Gipsy Lane Knebworth Hertfordshire SG3 6PL

27 Oct 2025

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ConditionsFull

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. (Amended plan received 05/12/25).

Land Adjacent To 67 Park Lane Knebworth Hertfordshire SG3 6PW

27 Oct 2025

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PermittedTrees

T1 Weeping Willow - Repollard to previous pollarding points, approx. 8m and remove deadwood. Reshape. T2 Weeping Willow - Repollard to previous pollarding points, approx. 8m. T3 Weeping Willow - Repollard to previous pollarding points, approx. 8m and reshape. T4 Weeping Willow - Selective Crown clear and remove deadwood throughout crown. T5 Maple - Fell and replant. T6 Deodar Cedar - Fell and Remove. T7 Ash - Selective crown reduction/retrenchment to reduce end-weight over entrance, remove unstable deadwood. T8 Larch - Fell and remove.

Larch Howe Park Lane Old Knebworth Knebworth Hertfordshire SG3 6PS

3 Oct 2025

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PermittedConditions

Details reserved by condition 9 (Internal Doors) of listed building consent reference 25/01516/LBC granted 25.09.2025.

Rustling End Farm Rustling End Codicote Hitchin Hertfordshire SG4 8TD

2 Oct 2025

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PermittedConditions

Details reserved by condition 4 (Glazing Section) of listed building consent reference 25/01516/LBC granted 25.09.2025.

Rustling End Farm Rustling End Codicote Hitchin Hertfordshire SG4 8TD

2 Oct 2025

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PermittedTrees

T2: Maple - Reduce by 30%. T3: Yew - Reduce by 20%.

10A Deards End Lane Knebworth Hertfordshire SG3 6NL

1 Oct 2025

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ConditionsFull

Single storey side/rear infill extension.

4 Oakfields Avenue Knebworth Hertfordshire SG3 6NP

2 Sept 2025

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PermittedHeritage

Replacement of 9 no. timber windows

1 Gun Lane Knebworth Hertfordshire SG3 6BH

29 Aug 2025

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ConditionsFull

Conversion of existing cart shed to one 2-bed ancillary annex (to existing farmhouse) and ancillary leisure facilities (as amended by drawing nos. REF-CS-003-ELEV B1 and REF-CS-003-PLAN B1 and as amplified by REF-CS-Doors & Windows Rev A received on 12/09/2025).

Rustling End Farm Rustling End Codicote Hitchin Hertfordshire SG4 8TD

4 Aug 2025

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ConditionsHeritage

Internal and external alterations to existing cart shed one 2-bed ancillary annex (to existing farmhouse) and ancillary leisure facilities (as amended by drawing nos. REF-CS-003-ELEV B1 and REF-CS-003-PLAN B1 and as amplified by REF-CS-Doors & Windows Rev A received on 12/09/2025).

Rustling End Farm Rustling End Codicote Hitchin Hertfordshire SG4 8TD

4 Aug 2025

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ConditionsFull

Conversion of existing cart shed to one 2-bed ancillary annex (to existing farmhouse) and ancillary leisure facilities (as amended by drawing nos. REF-CS-003-ELEV B1 and REF-CS-003-PLAN B1 and as amplified by REF-CS-Doors & Windows Rev A received on 12/09/2025).

Rustling End Farm Rustling End Codicote Hitchin Hertfordshire SG4 8TD

4 Aug 2025

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ConditionsAmendment

Variation of condition 2 (revised plans) of planning permission 24/01864/FP granted 14.03.2025 for Conversion of existing dwelling into 6 self-contained flats (5 x 1-bed and 1 x 2-bed) to include two storey side extension; landscaping; fencing; parking; refuse and cycle storage and boundary treatments following demolition of existing garage.

Caxton Villa 14 Park Lane Knebworth Hertfordshire SG3 6PF

10 Jul 2025

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PermittedConditions

Details reserved by condition 2 (Materials) of listed building consent reference no 25/00652/LBC granted 02.06.2025

Rustling End Farm Rustling End Codicote Hitchin Hertfordshire SG4 8TD

10 Jun 2025

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PermittedConditions

Details reserved by condition 6 (Roof Lights) of listed building consent reference no 25/00652/LBC granted 02.06.2025

Rustling End Farm Rustling End Codicote Hitchin Hertfordshire SG4 8TD

10 Jun 2025

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PermittedConditions

Details reserved by condition 3 (Glazing) of listed building consent reference no 25/00652/LBC granted 02.06.2025

Rustling End Farm Rustling End Codicote Hitchin Hertfordshire SG4 8TD

10 Jun 2025

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UndecidedConditions

Details reserved by condition 4 (Windows) of listed building consent reference no 25/00652/LBC granted 02.06.2025

Rustling End Farm Rustling End Codicote Hitchin Hertfordshire SG4 8TD

10 Jun 2025

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PermittedConditions

Details reserved by condition 5 (Doors) of listed building consent reference no 25/00652/LBC granted 02.06.2025

Rustling End Farm Rustling End Codicote Hitchin Hertfordshire SG4 8TD

10 Jun 2025

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PermittedConditions

Details reserved by condition 7 (Insulation) of listed building consent reference no 25/00652/LBC granted 02.06.2025

Rustling End Farm Rustling End Codicote Hitchin Hertfordshire SG4 8TD

10 Jun 2025

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ConditionsFull

Two storey side and part single storey rear extensions including first floor rear terrace area with glass balustrade, single storey side extension and front porch canopy following demolition of existing double garage. Alterations to fenestration.

31 Stevenage Road Knebworth Hertfordshire SG3 6NN

21 May 2025

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ConditionsFull

Single storey extension and repositioning of porch.

Annexe At Cuckoo Hall 73 Park Lane Old Knebworth Hertfordshire SG3 6PP

19 May 2025

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ConditionsFull

Single storey side extension following demolition of existing side element.

37 Stockens Green Knebworth Hertfordshire SG3 6DQ

16 May 2025

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PermittedOutline

Single storey rear extension with the following dimension: Length as measured from rear wall of original dwelling - 3.50 metres

36 Hornbeam Spring Knebworth Hertfordshire SG3 6BE

7 May 2025

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ConditionsAmendment

Variation of condition 2 (revised plans) of planning permission 24/02725/FPH granted 05.12.2024 for Single storey front and side extensions following demolition of existing front and side element.

12 Woodstock Knebworth Hertfordshire SG3 6EA

25 Apr 2025

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RejectedFull

Change of use of land to equestrian and erection of stables and covered menage.

Land At Church Wood Three Houses Lane Codicote Hertfordshire

24 Apr 2025

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