17 Dellney Avenue Haywards Heath West Sussex RH16 3LX

1. 10 Oct 2025

   Received by Mid Sussex

2. 17 Nov 2025

   Decision issued: Permission

3. 12 Aug 2026

   Added to PlanIndex

The council has decided this application; the published outcome sits in the record above and the decision notice on the council portal carries the detail, including any conditions.

If permission was granted, work must normally begin within three years of the decision. If it was refused, the applicant can appeal within the statutory time limit or submit a revised scheme.

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

• 19 Dellney Avenue Haywards Heath West Sussex RH16 3LX

  DM/25/2351 Submitted 16 Sep 2025 9m away

  Variation of condition 3 of planning application DM/25/0771 to allow for an alternative external finish on the workshop (weather edge cladding instead of brickwork).

  Decided Amendments 8 docs

• 12 And 14 Eastern Road Haywards Heath West Sussex RH16 3NN

  DM/26/0502 Submitted 25 Feb 2026 45m away

  Two storey rear and side extensions and single storey rear extensions to a pair of semi-detached houses previously converted into four flats, with garden rooms within the rear garden and new parking spaces within the front garden.

  Decided Full applications New dwelling Extension 32 docs
  Several homes

• 26 Dellney Avenue Haywards Heath West Sussex RH16 3ND

  DM/26/0369 Submitted 12 Feb 2026 67m away

  Construction of a single storey rear extension

  Decided Lawful development Extension 9 docs
  Small domestic

• 2 Eastern Road Haywards Heath West Sussex RH16 3NN

  DM/21/2000 Submitted 20 May 2021 96m away

  Single storey rear extension with pitched roof. (amended plans received 29/07/2021)

  Decided Householder Extension 23 docs
  Small domestic

• 2 West Mallion Haywards Heath West Sussex RH16 4HP

  DM/26/1814 Submitted 22 Jul 2026 148m away

  72% historically approved · decision due ~16 Sep

  Twin Stemmed Oak - fell to ground.

  Decided Trees

• 29 Franklynn Road Haywards Heath West Sussex RH16 4DQ

  DM/25/3097 Submitted 2 Dec 2025 155m away

  Proposed single storey side extension replacing existing conservatory, rear extension.

  Decided Householder Extension 7 docs
  Small domestic

• DM/26/0778 Withdrawn

  Depot Rear Of 25 Gower Road Haywards Heath West Sussex RH16 4PL

  Install 5 no white uPVC windows and remove 1no window and insert 1no door in the existing wall

  25 Mar 2026 Lawful development
• DM/26/1282 Decided

  21 Bartlett Close Burgess Hill West Sussex RH15 0AT

  Proposed single storey rear / side extension

  22 May 2026 Lawful development
• DM/26/1239 Decided

  6 St Christophers Road Hurstpierpoint Hassocks West Sussex BN6 9UX

  Loft conversion with matching roof tile clad box dormer to rear

  18 May 2026 Lawful development
• DM/26/1142 Decided

  26 Fairfield Crescent Hurstpierpoint Hassocks West Sussex BN6 9SF

  Loft conversion via hip to gable and rear dormer.

  6 May 2026 Lawful development
• DM/26/1299 Decided

  4 Beech Hurst Close Haywards Heath West Sussex RH16 4AE

  Proposed single storey rear extension, internal remodelling and a replacement front porch.

  26 May 2026 Lawful development