12 Suffolk Avenue Leigh-on-sea Essex SS9 3HD

1. 29 Dec 2025

   Received by Southend-on-Sea

2. 9 Apr 2026

   Validated

   Checked as complete and ready for consideration.

3. 4 Jun 2026

   Decision issued: Grant Lawful Dev Certificate (Proposed)

4. 19 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

• Westcliff High School For Girls Kenilworth Gardens Westcliff-On-Sea Essex SS0 0BS

  21/00724/FUL Submitted 9 Apr 2021 122m away

  Erect extensions to side and rear of existing Sports Hall and alter elevations

  Granted Full applications Extension 12 docs

• 90 Manchester Drive Leigh-on-sea Essex SS9 3HR

  26/01019/FULH 210m away

  84% historically approved

  Erect single storey front extension, erect detached outbuilding to rear, demolish side garage and alter elevations

  Awaiting decision New dwelling Extension +1
  Small domestic

• 47 Manchester Drive Leigh-on-sea Essex SS9 3HP

  24/01249/FULH Submitted 6 Aug 2024 248m away

  Erect single storey rear extension and front porch

  Granted Householder Extension
  Small domestic

• 96 Cricketfield Grove Leigh-on-sea Leigh-On-Sea Essex SS9 3EL

  21/01260/FULH Submitted 16 Jun 2021 360m away

  Erect two storey side extension and single storey rear extension (Amended Proposal)

  Granted Householder Extension 8 docs
  Small domestic

• 15 Glenbervie Drive Leigh-on-sea Essex SS9 3JU

  22/02346/FULH Submitted 7 Dec 2022 365m away

  Hipped to gable roof extension with dormer to rear to form habitable accommodation in the loftspace (retrospective)

  Granted Householder Extension Loft or dormer 5 docs
  Domestic

• 174 Mountdale Gardens Leigh-on-sea Essex SS9 4AB

  26/00472/FULH Submitted 8 Apr 2026 394m away

  Install dormer to front and rear to create habitable accommodation in the roof space, rooflight to side elevation

  Granted Householder Loft or dormer
  Domestic

• 26/00613/CLE Granted

  57 York Road Southend-on-sea Essex SS1 2BZ

  Use dwelling as a 9-person HMO (Certificate of Lawfulness - Existing)

  5 May 2026 Lawful development
• 26/01132/CLP Status unknown

  16 Plymtree Thorpe Bay Essex SS1 3RA

  Detached outbuilding to rear (certificate of lawful development - proposed)

  7 Aug 2026 Lawful development
• 26/00690/CLP Refused

  472 Woodgrange Drive Southend-on-sea Essex SS1 3ED

  Extend garage at front and rear

  21 May 2026 Lawful development
• 26/00741/CLE Granted

  57 - 59 Elm Road Leigh-on-sea Essex SS9 1SP

  Confirmation that planning permission 16/01572/FUL as varied by 18/01443/AMDT has been lawfully implemented (Certificate of Lawful Development - Existing)

  2 Jun 2026 Lawful development
• 26/00746/CLP Granted

  21 Shanklin Drive Westcliff-on-sea Essex SS0 9XU

  Removal of chimney stack on rear roof slope, erect dormer to rear to create habitable accommodation in roof space, two rooflights to front roof slope, alterations to elevations (Lawful Development Certificate - Proposed)

  2 Jun 2026 Lawful development