7 Mostyn Road Colwyn Bay LL29 8PB

1. 15 May 2026

   Received by Conwy

2. 29 May 2026

   Validated

   Checked as complete and ready for consideration.

3. 9 Jul 2026

   Decision issued: Approved

4. 7 Aug 2026

   Added to PlanIndex

Permission has been granted, usually subject to conditions listed on the decision notice, some of which must be discharged before work starts. The decision notice on the council portal sets out exactly what was approved.

Work must normally begin within five years of the decision or the permission lapses. Neighbours cannot appeal a grant; challenging one means judicial review of how the decision was made, within tight time limits.

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

• 1 Aucklands, Ground Floor Office Mostyn Road Colwyn Bay LL29 8PB

  0/52908 Submitted 13 Oct 2025 27m away

  Proposed change of use of existing ground floor and basement floor accommodation to a self-contained flat accommodation unit & associated works.

  Granted Full applications 16 docs

• Former Coach House to Rear of 74 Conway Road Colwyn Bay Conwy LL29 7LD

  0/50371 Submitted 12 Jan 2023 60m away

  Change of use of redundant outbuilding to emergency accommodation

  Granted Full applications 19 docs

• Former Coach House to Rear of 74 Conway Road Colwyn Bay Conwy LL29 7LD

  0/50553 Submitted 2 Mar 2023 60m away

  Approval of matters required by condition 4 (Photographic Survey) & 9 (Obscure glazing) of planning permission 0/50371 (Change of use of redundant outbuilding to emergency accommodation)

  Granted Conditions Windows or glazing 9 docs

• 33 Princes Drive Colwyn Bay LL29 8PD

  0/53512 Submitted 25 Jun 2026 61m away

  T1: Copper Beech, proposal of reducing the crown by approximately 1.5 - 2.5 meters overall.

  Granted Trees 6 docs

• 26 Mostyn Road Colwyn Bay LL29 8PB

  0/48059 Submitted 13 Jan 2021 70m away

  Change of use from offices into a single 3 bedroom dwelling.

  Granted Full applications 23 docs
  Domestic

• 27 Princes Drive Colwyn Bay LL29 8HT

  0/53154 Submitted 23 Dec 2025 76m away

  86% historically approved · decision due ~20 Mar

  Change of use from three storey office block to one, two bedroom flat and five, one bedroom flats

  Awaiting decision Full applications New dwelling 24 docs

• 0/53503 Granted

  Palo Seco 51 Pen Y Bryn Road Upper Colwyn Bay Colwyn Bay Conwy LL29 6AG

  Certificate of Lawfulness for the proposed construction of a single storey detached garden room and ancillary facilities ancillary to existing dwelling

  29 Jun 2026 Lawful development
• 0/53453 Granted

  4 Trem Yr Afon Llandudno Junction Conwy LL31 9AG

  Certificate of lawful development for the existing use of Class C1 Guest House to a C3 dwelling

  13 Feb 2026 Lawful development
• 0/53631 Awaiting decision

  Hyfrydle St Beuno's Road Great Orme Llandudno LL30 2JU

  Certificate of Lawfulness for the proposed change of fenestration to the rear elevation of the existing dwellinghouse.

  18 Aug 2026 Lawful development
• 0/53639 Awaiting decision

  5 Rhiw Road Colwyn Bay LL29 7TE

  Certificate of Lawfulness for the proposed replacement of existing vertical boiler flue to the principal elevation roof

  12 Aug 2026 Lawful development
• 0/53466 Granted

  Land South of Gwellyn Avenue Gwellyn Avenue Kinmel Bay Rhyl LL18 5HR

  Certificate of lawfulness for an existing use of the land for B8 (Storage and Distribution) and Sui Generis (Caravan Storage)

  9 Jun 2026 Lawful development