33 Treecot Drive Leigh-on-sea Essex SS9 4AG

1. 15 Aug 2026

   Received by Southend-on-Sea

2. 17 Aug 2026

   Validated

   Checked as complete and ready for consideration.

3. 19 Aug 2026

   Added to PlanIndex

4. 12 Oct 2026

   Status changed to Decided

Southend-on-Sea has decided this application; the outcome above is the register's own wording and the decision notice on the council portal carries the detail. 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.

• 162 Bridgwater Drive Westcliff-on-sea Essex SS0 0DS

  21/01409/FULH Submitted 8 Jul 2021 150 yards away

  Erect single storey rear extension and single storey side extension

  Granted Householder Extension 5 docs
  Small domestic

• 10 Treelawn Drive Leigh-on-sea Essex SS9 4AQ

  26/00887/FULH 150 yards away

  86% historically approved

  Install one air conditioning unit to front elevation with associated pipework and electrical connections (Retrospective)

  Decided

• 10 Treelawn Drive Leigh-on-sea Essex SS9 4AQ

  26/01190/AD 150 yards away

  86% historically approved

  Application for Approval of Details pursuant to condition 02 (Noise Survey) of planning permission 26/00887/FULH dated 21.08.26 (Retrospective)

  Decided

• 17 Treelawn Gardens Leigh-on-sea Essex SS9 4AH

  21/01674/NON Submitted 13 Aug 2021 200 yards away

  Replace plan numbers PL005 and PL006 with plan numbers PL005-A and PL006-A removing side handrails from balcony (Non-Material Amendment to Planning Permission 21/01135/FULH dated 21.07.2021)

  Decided Amendments 8 docs

• 12 Treelawn Gardens Leigh-on-sea Essex SS9 4AH

  23/00385/FULH Submitted 3 Mar 2023 200 yards away

  Erect single storey side extension and single storey side/rear extension and alterations to elevations

  Granted Householder Extension 4 docs
  Small domestic

• 10 Treelawn Drive Leigh-on-sea Essex SS9 4AQ

  26/00583/CLP Submitted 28 Apr 2026 200 yards away

  Install air conditioner unit to front elevation

  Refused Lawful development

• 26/01070/CLP Granted

  58 Ronald Park Avenue Westcliff-on-sea Essex SS0 9QN

  Dormer to rear to form habitable accommodation in the loft space and rooflights to front (certificate of lawful development - proposed)

  Received 11 Aug, published by the council 14 Aug 2026 Lawful development
• 26/01065/CLP Granted

  1132 London Road Leigh-on-sea Essex SS9 2AJ

  Dormer to rear and rooflights to front to form habitable accommodation in the loftspace and single storey side/rear extension (certificate of lawful development - proposed)

  Received 10 Aug, published by the council 14 Aug 2026 Lawful development
• 26/01018/CLP Refused

  92 Vardon Drive Leigh-on-sea Essex SS9 3SQ

  Hip to gable roof extension with dormer to rear and rooflights to front to form habitable accommodation in the loftspace (certificate of lawful development - proposed)

  Received 30 Jul, published by the council 8 Aug 2026 Lawful development
• 26/01008/CLP Granted

  61 Flemming Avenue Leigh-on-sea Essex SS9 3AN

  Hip to gable loft conversion, rooflights to front, and dormer to rear with Juliet balcony to create habitable accommodation in roof space (Lawful Development Certificate - Proposed).

  Received 29 Jul, published by the council 8 Aug 2026 Lawful development
• 26/01020/CLP Granted

  66 Marlborough Road Southend-on-sea Essex SS1 2UD

  Single storey side extension (Lawful Development Certificate - Proposed)

  Received 31 Jul, published by the council 8 Aug 2026 Lawful development