Land To The Rear Of, 340 Thelwall Lane, Warrington, WA4 1NJ

1. 14 May 2026

   Received by Warrington

2. 27 Aug 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 9 July 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

The published feed does not show a live status for this application, which usually means the council register holds more recent detail than the copy PlanIndex receives.

The council portal linked on this page carries the authoritative version, including the documents, any consultation deadline and the decision once made. PlanIndex refreshes its copy of the register on a daily cycle.

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

• Land To The Rear Of 340 Thelwall Lane, Warrington, WA4 1NJ

  2026/00619/FUL Submitted 11 May 2026 0m away

  Decision due ~6 Jul

  Part Retrospective planning permission for the retention of a detached self-contained residential dwelling with alterations to roof through the removal of dormers and reduction in height

  Status unknown Full applications Loft or dormer
  Domestic

• 304 Thelwall Lane, Warrington, WA4 1NJ

  2025/01503/HPA Submitted 23 Oct 2025 0m away

  Proposed single storey rear extension to extend beyond the rear wall by 5.46m, overall height of 2.80m and height to eaves of 2.80m

  Granted Prior approval Extension
  Small domestic

• 1, The Locks Thelwall New Road, Warrington, WA4 2GS

  2021/40547 Submitted 22 Nov 2021 137m away

  Replacement of the existing metal juliet balcony with a new larger cantilevered metal framed glazed balcony.

  Granted Full applications Windows or glazing 10 docs

• New World Site, Thelwall Lane, WARRINGTON, WA4 1NL

  2012/20213 Submitted 6 Jun 2012 160m away

  Application for approval of details reserved by condition 16 (affordable housing and occupancy criteria) on approval 2007/11944.

  Granted Conditions 6 docs

• 295 Thelwall New Road, Warrington, WA4 2NQ

  2024/01573/FULH Submitted 13 Dec 2024 165m away

  Loft conversion with hip to gable extension and rear dormer

  Refused Householder Extension Loft or dormer
  Domestic

• 135A Powder Mill Road, Latchford, Warrington, WA4 1GB

  2021/39010 Submitted 19 Mar 2021 194m away

  Householder - single storey rear extension (amended description).

  Granted Full applications Extension 9 docs
  Small domestic

• 2026/00830/CLDP Status unknown

  16 Hallows Avenue, Orford, Warrington, WA2 8DU

  Single Storey Side Extension

  30 Jun 2026 Lawful development
• 2026/00825/CLDP Status unknown

  42 Thorntree Green, Appleton, Warrington, WA4 4QU

  Demolition of conservatory & construction of single storey extension

  29 Jun 2026 Lawful development
• 2026/00826/CLDP Status unknown

  33 Wensleydale Close, Great Sankey, Warrington, WA5 3HZ

  Removal of Existing Conservatory Replaced with a Single Storey Rear Extension.

  29 Jun 2026 Lawful development
• 2026/00819/CLDP Status unknown

  1 Tilman Close, Great Sankey, Warrington, WA5 8ET

  Single storey rear extension and front canopy extension

  26 Jun 2026 Lawful development
• 2026/00807/CLDP Status unknown

  78 Pelham Road, Grappenhall And Thelwall, Warrington, WA4 2HA

  (none)

  24 Jun 2026 Lawful development