18 Deards End Lane Knebworth Hertfordshire SG3 6NL

1. 1 Apr 2026

   Received by North Hertfordshire

2. 26 May 2026

   Decision issued: Prior Approval Not Required

3. 9 Aug 2026

   Added to PlanIndex

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.

Prior approval applications arise where permitted development rights already grant the principle of the work, such as larger home extensions, changes of use to housing or agricultural buildings. The council may only consider the specific matters set out in the rules, for example transport, flooding or appearance, and in many classes the work may proceed if the council does not respond within the deadline, commonly 56 days.

More on prior approval applications in our guide

• 18 Deards End Lane Knebworth Hertfordshire SG3 6NL

  23/00142/LDCP Submitted 20 Jan 2023 8m away

  Installation of 2 No. rear roof lights to existing roof slope

  Granted Lawful development Loft or dormer 7 docs

• 16 Deards End Lane Knebworth Hertfordshire SG3 6NL

  26/00995/TCA Submitted 15 Apr 2026 47m away

  T1: Cedar - Crown reduction by approx 7m, crown lift / raise canopy by approx 2m. Reduce lateral spread by approx 2m. Prune back to provide approx 0.5m clearance from the BT telephone line where branches are currently encroaching. T2: Thuja - Crown reduction by approx 5m. Crown lift / raise canopy by approx 2m. Reduce lateral spread by approx 2m.

  Granted Trees 4 docs

• 18a Deards End Lane Knebworth Hertfordshire SG3 6NL

  19/02562/TCA Submitted 23 Oct 2019 51m away

  T1 Ash - Crown reduce by up to 4m back to good viable growth points.

  Granted Trees 4 docs

• 14 Deards End Lane Knebworth Hertfordshire SG3 6NL

  26/00868/FPH Submitted 2 Apr 2026 92m away

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

  Refused Householder Extension Demolition 10 docs
  Domestic

• 21a Deards End Lane Knebworth Hertfordshire SG3 6NL

  24/01664/FPH Submitted 29 Jul 2024 147m away

  Replace existing timber windows with triple glazed dark grey aluminium windows

  Decided Householder Windows or glazing
  Domestic

• 12 Deards End Lane Knebworth Hertfordshire SG3 6NL

  20/02668/FPH Submitted 17 Nov 2020 149m away

  Part single storey part two storey side extensions, insertion of gable window to existing side gable end, erection of single storey attached front garage and ground and first floor rear extensions following demolition of existing front attached garage and rear conservatory

  Withdrawn Householder Extension Demolition +1 24 docs
  Small domestic

• 26/01462/PNR Granted

  Agricultural Barn Hall Barn Ashwell Road Newnham Hertfordshire SG7 5JX

  Change of use and conversion of two bays of existing agricultural barn to form two light industrial units (Class E (g) (iii)).

  5 Jun 2026 Prior approval
• 26/01115/PNQ Granted

  Land Located To The Southwest Of Deadman's Hill Gannock Road Sandon Hertfordshire

  Change of use of an agricultural barn to one dwelling to include alterations to fenestration and provision of two parking spaces.

  18 May 2026 Prior approval
• 26/00667/PNAA Granted

  33 Kite Way Letchworth Garden City Hertfordshire SG6 4YQ

  Enlargement of detached bungalow by the construction of an additional storey to result in an overall height of 8.55 metres.

  20 Mar 2026 Prior approval
• 24/02360/PNQ Withdrawn

  Fear End Fears Green Sandon Buntingford Hertfordshire SG9 0QY

  Conversion of agricultural buildings into 9 residential dwellings

  21 Oct 2024 Prior approval
• 24/02399/PNAA Granted

  The Cottage 73 Park Lane Old Knebworth Hertfordshire SG3 6PP

  Enlargement of detached bungalow by the construction of an additional storey to result in an overall height of 6.45 metres.

  24 Oct 2024 Prior approval