51 Gilpin Green Harpenden Hertfordshire Al5 5Np

1. 25 Oct 2017

   Received by St Albans

2. 26 Oct 2017

   Validated

   Checked as complete and ready for consideration.

3. 1 Dec 2017

   Decision issued: Certificate of Lawfulness Approved

4. 17 Sep 2026

   Added to PlanIndex

St Albans granted permission on 1 December 2017, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.

A lawful development certificate is a legal determination that existing or proposed works do not need planning permission; the merits of the scheme are not considered. More in our guide to planning application types.

• 16 Gilpin Green Harpenden Hertfordshire Al5 5Nr

  5/2017/3556 Submitted 15 Dec 2017 100 yards away

  Construction of one, four bedroom dwelling following demolition of existing dwelling

  Granted Demolition 19 docs
  Domestic

• 24 Gilpin Green Harpenden Hertfordshire Al5 5Nr

  5/2017/3099 Submitted 3 Nov 2017 100 yards away

  Two storey front extension

  Granted Householder Extension 16 docs
  Domestic

• 14 Gilpin Green Harpenden Hertfordshire Al5 5Nr

  5/2021/1459 Submitted 16 May 2021 100 yards away

  First floor side and rear extensions and alterations to existing dropped kerb

  Granted Householder Extension 9 docs
  Small domestic

• 16 Gilpin Green Harpenden Hertfordshire Al5 5Nr

  5/2021/1959 Submitted 4 Jul 2021 100 yards away

  Non Material Amendment - Reduction in size of rooflights, insertion of new window, alterations to balustrade, installation of air source heat pump and changes to glazed gable arrangement to planning permisssion 5/2020/2035 dated 22/12/2020 for Demolition

  Refused Amendments Loft or dormer Demolition +1 12 docs

• 14 Gilpin Green Harpenden Hertfordshire Al5 5Nr

  5/2017/2575 Submitted 10 Sep 2017 100 yards away

  Non Material Amendment - Removal of window from front elevation and centralisation of front door to planning permission 5/2017/1375 dated 30/06/2017 for Single storey front, side and rear extensions, rear patio, concrete paving for additional parking spac

  Granted Amendments Extension Windows or glazing 4 docs
  Small domestic

• 77 Overstone Road Harpenden Hertfordshire Al5 5Pl

  5/2016/3722 Submitted 13 Dec 2016 100 yards away

  Single storey front and rear extensions and new openings

  Granted Householder Extension 14 docs
  Small domestic

• 5/2026/1638 Granted

  1 Castle Rise Wheathampstead Hertfordshire Al4 8Hx

  Certificate of Lawfulness (proposed) - Proposed loft hip to gable with rear dormer, internal alterations and all associated works at 1 Castle Rise, AL4 8HX

  Received 7 Sep, published by the council 13 Sep 2026 Lawful development
• 5/2026/1622 Granted

  9 Necton Road Wheathampstead Hertfordshire Al4 8At

  Certificate of Lawfulness (proposed) - Dormer to rear elevation to existing bedroom. new window to rear

  Received 2 Sep, published by the council 13 Sep 2026 Lawful development
• 5/2026/1561 Granted

  125 New House Park St Albans Hertfordshire Al1 1Uh

  Certificate of Lawfulness (existing) - The retrospective development comprises minor external alterations to the rear elevation of the dwellinghouse at 125 New House Park. The applicant seeks a Certificate of Lawfulness (Existing) under Section 191 of the

  Received 21 Aug, published by the council 31 Aug 2026 Lawful development
• 5/2026/1772 Awaiting decision

  14 Ashley Road St Albans Hertfordshire Al1 5Da

  Certificate of Lawfulness (Proposed) - Loft Conversion, Hip to gable, Rear dormer

  Received 29 Sep, published by the council 11 Oct 2026 Lawful development
• 5/2026/1759 Awaiting decision

  2 Grimston Road St Albans Hertfordshire Al1 5Ep

  Certificate of Lawfulness (Proposed) - Erection of a single-storey detached timber log cabin with a pent (mono-pitch) roof in the rear garden, for purposes incidental to the enjoyment of the dwellinghouse (domestic storage and hobby workshop). Footprint 9

  Received 28 Sep, published by the council 11 Oct 2026 Lawful development