17 Seamore Avenue Thundersley Benfleet Essex SS7 4EX

1. 4 Oct 2022

   Received by Castle Point

2. 28 Nov 2022

   Validated

   Checked as complete and ready for consideration.

3. 19 Jan 2023

   Decision issued: Approval

4. 9 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

• 49 Church Road Thundersley Benfleet Essex SS7 4BP

  22/0878/FUL Submitted 24 Nov 2022 55m away

  Demolish existing detached garage, conservatory and porch, erect part single/part two storey rear and side extension with balcony and external stair, convert dwelling to three flats, provide bin and cycle storage to rear and widen vehicular accesses

  Granted Full applications New dwelling Extension +1 12 docs
  Several homes

• 31 Seamore Avenue Thundersley Benfleet Essex SS7 4EX

  21/0363/FUL Submitted 12 Apr 2021 70m away

  Demolish existing garage and shed and construct part single/part two storey side/rear extension

  Granted Full applications Extension Demolition 6 docs
  Small domestic

• 24 Seamore Avenue Thundersley Benfleet Essex SS7 4EX

  26/0393/CLP Submitted 8 Jul 2026 75m away

  79% historically approved · decision due ~7 Sep

  Construct roof dormer extensions and external alterations to fenestration

  Awaiting decision Lawful development Extension Loft or dormer +1 12 docs

• 24 Seamore Avenue Thundersley Benfleet Essex SS7 4EX

  26/0387/CLP Submitted 6 Jul 2026 75m away

  Construct single storey rear extension and external alterations

  Granted Lawful development Extension 14 docs
  Small domestic

• 30 Seamore Avenue Thundersley Benfleet Essex SS7 4EX

  21/0258/FUL Submitted 18 Mar 2021 78m away

  Part two storey/part first floor rear extension

  Granted Full applications Extension 6 docs

• 33 Church Road Thundersley Benfleet Essex SS7 4BW

  24/0491/FUL Submitted 27 Aug 2024 80m away

  Demolition of conservatory and garage and construction of single storey rear/side extension incorporating attached garage

  Granted Full applications Extension Demolition 21 docs
  Small domestic

• 26/0322/CLP Granted

  152 High Road Benfleet Essex SS7 5LD

  Construct single storey rear extension projecting 3.0m from the rear elevation, with a flat roof incorporating a roof lantern. External materials to match the existing dwelling, including render, roof finishes and fenestration. The extension will provide additional habitable living space.

  8 Jun 2026 Lawful development
• 26/0481/CLE Awaiting decision

  Land Rear Of 17 Underhill Road Benfleet Essex SS7 1EW

  Site excavated and foul drainage installed

  24 Aug 2026 Lawful development
• 26/0476/CLP Awaiting decision

  6 Willison Way Benfleet Essex SS7 1FP

  Construct single storey rear extension and loft conversion

  19 Aug 2026 Lawful development
• 26/0334/CLP Granted

  21 Silver Point Marine Canvey Island Essex SS8 7TN

  Construct single storey rear extension and external alterations

  11 Jun 2026 Lawful development
• 26/0469/CLP Awaiting decision

  74 Thorney Bay Road Canvey Island Essex SS8 0HQ

  Demolition of the existing part-width rear conservatory and construction of a new single-storey rear extension measuring 7.2m in width and projecting 3m from the original rear wall of the dwelling. The extension will have an eaves height to not exceed 3m and a pitched roof with a maximum overall height not exceeding 4m. The external walls will be constructed in brickwork to match the existing dwelling. The proposal includes all associated building works required to construct and connect the extension to the existing dwelling.

  18 Aug 2026 Lawful development