33 Holly Walk Harpenden Hertfordshire Al5 5Rg

1. 27 Sep 2017

   Received by St Albans

2. 4 Oct 2017

   Validated

   Checked as complete and ready for consideration.

3. 29 Nov 2017

   Decision issued: Certificate of Lawfulness Approved

4. 25 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.

A lawful development certificate is a legal determination, not a planning judgement. It asks the council to confirm either that existing use or works are lawful, often through the passage of time, or that a proposal would not need planning permission at all. The applicant must prove the facts; the merits of the scheme are not considered.

More on lawful development applications in our guide

• 100 Crabtree Lane Harpenden Hertfordshire Al5 5Rf

  5/2026/0730 Submitted 13 Apr 2026 69m away

  Removal of rear garden store, erection of first floor side extension over existing ground floor footprint and associated internal alterations

  Decided Householder Extension 8 docs
  Domestic

• 14 Tylers Harpenden Hertfordshire Al5 5Rt

  5/2026/0348 Submitted 24 Feb 2026 95m away

  Single storey front extension & conversion of existing garage plus addition of patio doors to rear elevation

  Decided Householder Extension Windows or glazing 16 docs
  Small domestic

• 7 Tylers Harpenden Hertfordshire Al5 5Rt

  5/2025/2282 Submitted 15 Dec 2025 95m away

  Single-storey rear extension, ground-floor front infill extension and first-floor front extension

  Decided Householder Extension 13 docs
  Small domestic

• 153 Crabtree Lane Harpenden Hertfordshire Al5 5Rd

  5/2017/2504 Submitted 3 Sep 2017 123m away

  Certificate of Lawfulness (proposed) - Loft conversion with rear dormer window

  Granted Lawful development Loft or dormer Windows or glazing 7 docs

• 9 Aldwickbury Crescent Harpenden Hertfordshire Al5 5Rs

  5/2026/0388 Submitted 2 Mar 2026 131m away

  Part single storey front extension with pitched roof to existing extension and alterations to openings

  Decided Householder Extension 9 docs
  Small domestic

• 46 Granby Avenue Harpenden Hertfordshire Al5 5Qr

  5/2017/2766 Submitted 1 Oct 2017 205m away

  Demolition of existing dwelling and construction of two, three bedroom semi-detached dwellings (resubmission following approval of 5/2017/1892 dated 19/09/2017)

  Decided Demolition 14 docs
  Domestic

• 5/2026/1607 Decided

  5 Flavian Close St Albans Hertfordshire Al3 4Jx

  Certificate of Lawfulness (proposed) - Construction of single storey rear extension with tiled lean to roof fitted with 3no. roof lights

  1 Sep 2026 Lawful development
• 5/2026/0951 Refused

  23 Clarence Road St Albans Hertfordshire Al1 4Np

  Certificate of Lawfulness (proposed) - New single storey garden room and close boarded access gates

  15 May 2026 Lawful development
• 5/2026/1558 Granted

  31 Highfield Avenue Harpenden Hertfordshire Al5 5Ub

  Certificate of Lawfulness ( Proposed) - Proposed rear single-storey extension, side single-storey extension and removal of rear chimney stack

  20 Aug 2026 Lawful development
• 5/2026/0291 Refused

  66 Pondfield Crescent St Albans Hertfordshire Al4 9Pf

  Certificate of Lawfulness (proposed) - Hip to gable and new dormer

  16 Feb 2026 Lawful development
• 5/2026/1252 Refused

  7 Palfrey Close St Albans Hertfordshire Al3 5Re

  Certificate of Lawfulness (proposed) - Single storey/ground floor extension to dining room, to extend as far as kitchen rear/outside wall across to party wall. Repositioning French windows to new rear of room, and repositioning downpipe and soak away in r

  30 Jun 2026 Lawful development