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 28m 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 30m 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 45m 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 49m 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 49m 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 59m away

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

  Granted Full applications 11 docs

• 2026/1278/PLD Refused

  11 Awel Y Mor Sketty Swansea SA2 9FL

  Ground floor rear extension (application for a Certificate of Proposed Lawful Development)

  5 Aug 2026 Lawful development
• 2026/0916/PLD Granted

  30 Station Road Grovesend Swansea SA4 4GY

  Single storey rear extension (appliction for a Certificate of Proposed Lawful Development)

  2 Jun 2026 Lawful development
• 2026/1246/PLD Granted

  13 Lon Gwynfryn Sketty Swansea SA2 0TZ

  Side hip to gable roof extension with upper floor side window, rear dormer with Juliet balcony and front rooflights (application for a Certificate of Proposed Lawful Development)

  29 Jul 2026 Lawful development
• 2026/1235/ELD Refused

  21 Malvern Terrace Brynmill Swansea SA2 0BE

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

  27 Jul 2026 Lawful development
• 2026/1047/PLD Granted

  48 Station Road Llanmorlais Swansea SA4 3TF

  Single storey rear extension (application for a Certificate of Proposed Lawful Development)

  22 Jun 2026 Lawful development