1 Marlborough Park Southdown Road Harpenden Hertfordshire Al5 1Nl

This site has had 2 applications since 2017: 1 approved, 1 refused.

• 5/2017/3622 Granted

  1 Marlborough Park Southdown Road Harpenden Hertfordshire Al5 1Nl

  Application for Prior Approval - Change of use from Class B1 (offices) to Class C3 (residential) to create two, one bedroom and two, two bedroom dwellings

  Decided 13 Feb 2018 Prior approval

1. 21 Sep 2017

   Received by St Albans

2. 16 Nov 2017

   Decision issued: COU Prior approval required and refused

3. 21 Aug 2026

   Added to PlanIndex

St Albans refused this application for the reasons on the decision notice; only the applicant can appeal, and refused schemes often return in revised form. More in our guide to what happens after a planning decision.

Prior approval applies where permitted development rights already grant the principle of the work, leaving the council only the specific matters the rules name, commonly within 56 days. More in our guide to planning application types.

• 1 Marlborough Park Southdown Road Harpenden Hertfordshire Al5 1Nl

  5/2017/3622 Submitted 20 Dec 2017 50 yards away

  Application for Prior Approval - Change of use from Class B1 (offices) to Class C3 (residential) to create two, one bedroom and two, two bedroom dwellings

  Granted Prior approval 12 docs

• 12 Gordons Walk Harpenden Hertfordshire Al5 1Lq

  5/2025/2277 Submitted 15 Dec 2025 100 yards away

  Part single, part two storey rear extension, garage conversion and insertion of window

  Granted Householder Extension Windows or glazing 11 docs
  Small domestic

• 21 Churchfield Harpenden Hertfordshire Al5 1Lj

  5/2021/1442 Submitted 16 May 2021 150 yards away

  Hip to gable roof alterations to accommodate additional bedroom and office

  Granted Householder Loft or dormer Roofing 9 docs
  Domestic

• 130A Southdown Road Harpenden Hertfordshire Al5 1Pu

  5/2026/1560 Submitted 20 Aug 2026 150 yards away

  88% historically approved · decision due ~16 Oct

  Conversion of an external covered colonnade to office space for a community building including new windows and doors to existing colonnade openings and one new window

  Awaiting decision Windows or glazing 9 docs

• 137 Southdown Road Harpenden Hertfordshire Al5 1Pu

  5/2024/0266 Submitted 13 Feb 2024 150 yards away

  96% historically approved · decision due ~10 Apr

  Discharge of Condition 5 (erection of low level screen around the flue) of planning permission 5/2022/1685 dated 24/01/2024 for Change of use of ground floor from Class E to Sui generis (takeaway), installation of new flue to rear

  Awaiting decision Conditions 5 docs

• 128A Southdown Road Harpenden Hertfordshire Al5 1Pu

  5/2020/2968 Submitted 9 Dec 2020 150 yards away

  Loft conversion with rear rooflights (part retrospective)

  Granted Loft or dormer 11 docs

• 5/2026/1784 Awaiting decision

  Sainsburys Everard Close St Albans Hertfordshire Al1 2Qu

  Prior Approval - A non-domestic, flat roof-mounted solar PV installation. 916 modules are designed for the system. Each panel is rated at 455W, totalling a system size of 416.78kW

  Received 1 Oct, published by the council 4 Oct 2026 Prior approval
• 5/2026/1777 Awaiting decision

  66 Pondfield Crescent St Albans Hertfordshire Al4 9Pf

  Prior Notification - Single storey rear extension 3.0m in height x 6.0m in depth with 2.70m height to eaves

  Received 29 Sep, published by the council 4 Oct 2026 Prior approval
• 5/2026/1579 Granted

  9 Cambridge Road St Albans Hertfordshire Al1 5Lh

  Prior Notification - Single storey rear extension 2.95m in height x 6m in depth with 2.95m height to eaves

  Received 25 Aug, published by the council 31 Aug 2026 Prior approval
• 5/2026/1727 Awaiting decision

  9 Tassell Hall Redbourn Hertfordshire Al3 7Jd

  Prior Notification - Single storey rear extension 3.4m in height x 4m in depth with 2.6m height to eaves

  Received 22 Sep, published by the council 26 Sep 2026 Prior approval
• 5/2026/1701 Awaiting decision

  Unit 1 Riverside Industrial Estate London Colney Bypass London Colney Hertfordshire Al2 1Hj

  Prior Approval - Demolition of Unit 1 comprises a singular rectangular industrial building with a service yard and hardstanding area for vehicle parking. The building extends to approximately 6,409.87 sqm and is of steel portal frame construction. The bui

  Received 17 Sep, published by the council 23 Sep 2026 Prior approval