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Planning application

21 Lansdowne Avenue Leigh-on-sea Essex SS9 1LJ

Awaiting decision Southend-on-Sea 26/01120/CLP Lawful development

Works: Extension Small domestic

Read from the description, not a valuation. How we read the register

Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.

Proposal

Single storey rear extension (certificate of lawful development - proposed)

As published by the council, reference 26/01120/CLP

Application record

Reference
26/01120/CLP
Category
Lawful development
Status
Registered
Ward
Chalkwell
Decision by
Delegated
Postcode
SS9 1LJ

Site history

Applications at this address on the Southend-on-Sea register

This site has had 3 applications.

  • 26/00986/CLP Awaiting decision

    21 Lansdowne Avenue Leigh-on-sea Essex SS9 1LJ

    Install dormer to rear and rooflights to front to form habitable accommodation in the loftspace (Lawful Development Certificate - Proposed)

    Lawful development
  • 26/00987/GPDE Awaiting decision

    21 Lansdowne Avenue Leigh-on-sea Essex SS9 1LJ

    Erect single storey rear extension projecting 5.5m beyond the existing rear wall of the dwelling, 2.7m high to eaves and with a maximum height of 3m

Timeline

Dates from the published record

  1. 28 Aug 2026

    Added to PlanIndex

  2. Decision

    Awaiting decision

    The statutory target is eight weeks for most applications and thirteen for major development. Extensions of time are common.

    Southend-on-Sea took a median of 59 days over the applications it decided in the last year.

Who's behind it

Company information only, from the register and Companies House

Agent on file, a planning consultancy registered in Benfleet

12 applications on PlanIndex · across 5 councils · 80% granted

Trade members see who it is, their full track record, and every application they have filed.

See who's behind it

What happens while it is decided

This application is with Southend-on-Sea for determination, against a statutory target of eight weeks. Over the last year Southend-on-Sea decided lawful development applications in a median of 56 days. More in our guide to how long planning decisions take.

About lawful development applications

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.

Nearby applications

Within 500 metres

  • 21 Lansdowne Avenue Leigh-on-sea Essex SS9 1LJ

    26/00986/CLP 0m away

    84% historically approved

    Install dormer to rear and rooflights to front to form habitable accommodation in the loftspace (Lawful Development Certificate - Proposed)

    Awaiting decision Lawful development Loft or dormer

  • 21 Lansdowne Avenue Leigh-on-sea Essex SS9 1LJ

    26/00987/GPDE 0m away

    84% historically approved

    Erect single storey rear extension projecting 5.5m beyond the existing rear wall of the dwelling, 2.7m high to eaves and with a maximum height of 3m

    Awaiting decision Extension
    Small domestic

  • 52 Woodfield Park Drive Leigh-on-sea Leigh-On-Sea Essex SS9 1LW

    21/01123/AD Submitted 26 May 2021 35m away

    Application for approval of details pursuant to condition 03 (details of materials), condition 07 (details of energy efficiency) and condition 09 (details of hard and soft landscaping) of planning permission 19/02239/FUL dated 06.02.2020

    Granted Conditions 7 docs

  • 53A Fernleigh Drive Leigh-on-sea Essex SS9 1LG

    24/01655/FUL Submitted 23 Oct 2024 66m away

    Extend existing vehicle crossover onto Fernleigh Drive

    Granted Full applications

  • 72 Woodfield Park Drive Leigh-on-sea Leigh-On-Sea Essex SS9 1LW

    21/01188/GPDE Submitted 3 Jun 2021 81m away

    Erect single storey rear extension, projecting 5.4m beyond the existing rear wall of the dwelling, 2.9m high to eaves and with a maximum height of 3.1m

    Decided Extension 4 docs
    Small domestic

  • 52 Fernleigh Drive Leigh-on-sea Essex SS9 1LQ

    22/02447/FULH Submitted 21 Dec 2022 100m away

    Erect part single/part two storey rear extension and single storey side and rear extension, install canopy to rear and install first floor balcony to front, alter elevations

    Granted Householder Extension 10 docs
    Small domestic

In Southend-on-Sea

  • 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