11 Cromwell Street Mount Pleasant Swansea SA1 6EZ

1. 31 Mar 2026

   Received by Swansea

2. 6 May 2026

   Decision issued: Was Lawful (existing)

3. 28 Jul 2026

   Added to PlanIndex

Swansea granted permission on 6 May 2026, subject to any conditions on the decision notice. Work must normally begin within five years or the permission lapses. More in our guide to what happens after a planning decision.

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.

• 21 Rhondda Street Mount Pleasant Swansea SA1 6ER

  2026/0197/FUL Submitted 5 Feb 2026 50 yards away

  Replacement single-storey flat-roofed infill extension, extension of the existing single-storey rear extension at ground floor level, and construction of a first-floor rear extension with the existing rear roof ridge extended over the new first-floor extension

  Granted Full applications Extension 14 docs
  Small domestic

• 5 Cromwell Street Mount Pleasant Swansea SA1 6EZ

  2026/0993/ELD Submitted 15 Jun 2026 50 yards away

  Use of Property as a HMO (Class C4) (application for a Certificate of Existing Lawful Development)

  Granted Lawful development 11 docs

• 25 The Promenade Mount Pleasant Swansea SA1 6EN

  2020/0796/ELD Submitted 4 May 2020 50 yards away

  Use of property as a seven bedroom House in Multiple Occupation (application for a Certificate of Existing Lawful Use)

  Refused Lawful development 13 docs

• 27 The Promenade Mount Pleasant Swansea SA1 6EN

  2019/1277/FUL Submitted 5 Jun 2019 50 yards away

  First and second floor front balconies, two front rooflights, increase in eaves height and replacement flat roof to garage, addition of new garage door and entrance door to rear elevation, extension to rear two storey pitched roof to create continuous ridgeline, addition of three rooflights to rear pitched roof and one rooflight to main roof

  Granted Full applications Extension Loft or dormer 7 docs

• 27 The Promenade Mount Pleasant Swansea SA1 6EN

  2019/0850/FUL Submitted 10 Apr 2019 50 yards away

  First and second floor front balconies, two front rooflights, increase in eaves height and creation of flat roof above garage to provide first floor rear balcony, addition of new garage door and entrance door to rear elevation, extension to rear two storey pitched roof to create continuous ridgeline, addition of three rooflights to rear pitched roof and one rooflight to main roof

  Refused Full applications Extension Loft or dormer 7 docs

• 15 The Promenade Mount Pleasant Swansea SA1 6EN

  2018/2083/FUL Submitted 26 Sep 2018 50 yards away

  Retention of change of use from residential (Class C3) to HMO for 3 people (Class C4)

  Granted Full applications 11 docs

• 2026/1645/PLD Awaiting decision

  27 Sycamore Road West Cross Swansea SA3 5LB

  Detached outbuilding (application for a Certificate of Proposed Lawful Development)

  Received 7 Oct, published by the council 9 Oct 2026 Lawful development
• 2026/1344/ELD Granted

  50 Eversley Road Sketty Swansea SA2 9DA

  Raised deck (application for a Certificate of Existing Lawful Development)

  Received 17 Aug, published by the council 27 Aug 2026 Lawful development
• 2026/1525/PLD Refused

  15 Westland Avenue West Cross Swansea SA3 5NP

  Single storey rear extension and alterations to fenestration (application for a Certificate of Proposed Lawful Development)

  Received 18 Sep, published by the council 25 Sep 2026 Lawful development
• 2026/1627/PLD Awaiting decision

  73 Mumbles Road West Cross Swansea SA3 5AA

  Stationing of a caravan to provide ancillary residential accommodation (application for a Certificate of Proposed Lawful Development)

  Received 5 Oct, published by the council 9 Oct 2026 Lawful development
• 2026/1270/ELD Refused

  188 Hanover Street Swansea SA1 6BP

  Use of property as a HMO (Class C4) (application for a Certificate of Existing Lawful Development)

  Received 4 Aug, published by the council 25 Aug 2026 Lawful development