Change of use applications in Cardiff

There were 55 change of use applications in Cardiff in the last 12 months. 12 involve HMOs. All 25 decided so far were approved. Change of use covers conversions between planning use classes: shops to flats, offices to homes, houses to HMOs or care homes.

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Showing 30 of 30 applications
26/01395/FUL 6 Jul 2026 Registered

190 Aberporth Road Llandaff North Cardiff CF14 2PS

Change of use from c3 dwelling house to c4 6 bed HMO.

Cardiff 6 Jul 2026
26/01391/CLEUD 6 Jul 2026 Registered

173 Rhymney Street Cathays Cardiff CF24 4DL

Use of the property as a Sui Generis House in Multiple Occupation (HMO).

Cardiff 6 Jul 2026
26/01393/FUL 6 Jul 2026 Registered

138 Rhymney Street Cathays Cardiff CF24 4DJ

Change of use from C3 Dwellinghouse to C4 House in Multiple Occupation (5 Bedrooms) and construction of rear dormer.

Cardiff 6 Jul 2026
26/01381/FUL 3 Jul 2026 Registered

119 Penarth Road Grangetown Cardiff CF11 6JU

Retention of Use as a Class C1 - Guest house/serviced accommodation.

Cardiff 3 Jul 2026
26/01370/FUL 2 Jul 2026 Registered

36 Albany Road Roath Cardiff CF24 3RQ

Change of Use from A1 to A2

Cardiff 2 Jul 2026
26/01373/VAR 2 Jul 2026 Registered

243 - 245 Cathedral Road Pontcanna Cardiff CF11 9PP

Change of use to Class A3 Coffee Shop, external and internal alterations and other associated refurbishments. (Approved 05/12/2025 - 25/02566/FUL); Va...

Cardiff 2 Jul 2026
26/01349/FUL 29 Jun 2026 Registered

36 Fishguard Road Llanishen Cardiff CF14 5PQ

Proposed change of use of ground floor commercial unit from A1 to A3 usage

Full Planning Permission Cardiff 29 Jun 2026
26/01336/FUL 26 Jun 2026 Registered

72 Albany Road Roath Cardiff CF24 3RS

GROUND FLOOR REAR EXTENSION AND SIDE EXTENSION TO SHOP WITH CHANGE OF USE TO ESTATE AGENCY PLUS SIDE DORMER LOFT CONVERSION TO FLAT 1

Full Planning Permission Cardiff 26 Jun 2026
26/01261/CLEUD 18 Jun 2026 Decided

58 Tewkesbury Street Cathays Cardiff CF24 4QT

Use of the property as a C4 House in Multiple Occupation (HMO).

Cert of Lawfulness Existing (s191) Cardiff 18 Jun 2026
26/01256/FUL 17 Jun 2026 Registered

16 Park Grove Cathays Cardiff CF10 3BN

Conversion of office to 3 flats

Full Planning Permission Cardiff 17 Jun 2026
26/01252/FUL 17 Jun 2026 Registered

276 North Road Gabalfa Cardiff CF14 3BL

CONVERSION FROM TWO TO THREE FLATS OVER THE EXISTING OFFICE WITH REAR DORMER LOFT CONVERSION

Full Planning Permission Cardiff 17 Jun 2026
26/01242/FUL 16 Jun 2026 Registered

33 Dalton Street Cathays Cardiff CF24 4HB

Change of use from a single dwelling house to 2 no. two-bedroom flats, including a two-storey rear extension and associated external alterations

Full Planning Permission Cardiff 16 Jun 2026
26/01201/FUL 10 Jun 2026 Registered

100 Brunswick Street Canton Cardiff CF5 1LL

Change of use from dwelling to 6 bedroom (7 occupant) HMO. Including rear dormer loft conversion

Full Planning Permission Cardiff 10 Jun 2026
26/01203/FUL 10 Jun 2026 Registered

Car Park Rear Of Cardiff University 33 - 34 Park Place Cathays Cardiff CF10 3TN

Demolition of boundary wall and construction of a six storey building with residential use on the upper floors and a flexible use at ground floor (eit...

Full Planning Permission Cardiff 10 Jun 2026
26/01162/FUL 4 Jun 2026 Registered

110 Clare Road Grangetown Cardiff CF11 6RU

Change of ground floor use to class A3 cafe.

Full Planning Permission Cardiff 4 Jun 2026
26/01148/FUL 3 Jun 2026 Registered

Clive Lodge 51 Clive Road Canton Cardiff CF5 1HG

Two storey side extension, infill side extension, rear dormer roof extension, hip to gable and ridge raise of the rear ground floor annex and installa...

Full Planning Permission Cardiff 3 Jun 2026
26/01145/CLEUD 3 Jun 2026 Decided

60 May Street Cathays Cardiff CF24 4EY

Use of the property as a C4 House in Multiple Occupation (HMO).

Cert of Lawfulness Existing (s191) Cardiff 3 Jun 2026
26/01126/FUL 2 Jun 2026 Registered

Flat 4 And 5 44 Harriet Street Cathays Cardiff CF24 4BY

Change of use from 2 no. 2-bedroom self-contained flats (Use class C3) to 2 no. 3-bedroom Houses in Multiple Occupation (Use Class C4).

Full Planning Permission Cardiff 2 Jun 2026
26/01122/CLPUD 1 Jun 2026 Decided

165 King's Road Pontcanna Cardiff CF11 9DE

Conversion of the property from three flats to a single dwelling.

Cert of Lawfulness Proposed (s192) Cardiff 1 Jun 2026
26/01108/CLPUD 29 May 2026 Decided

3 St John Street Cathays Cardiff CF10 1GJ

Use the premises for hot food takeaway purposes under the existing A3 use.

Cert of Lawfulness Proposed (s192) Cardiff 29 May 2026
26/01106/VAR 28 May 2026 Decided

15 Churchill Way Cathays Cardiff CF10 2HD

Change of use from shop (use class A1) to office (use class B1). (Approved 20 January 2026- 25/02922/FUL):- Variation of Condition 2 (Approved Plans) ...

Variation of conditions Cardiff 28 May 2026
26/01121/VAR 28 May 2026 Decided

2 Diana Street Roath Cardiff CF24 4TS

Variation of condition 2 of 17/00211/MNR to allow substitution of approved plans showing reduced extent of rear extension to that approved, and altera...

Variation of conditions Cardiff 28 May 2026
26/00959/FUL 12 May 2026 Registered

57 Rhymney Street Cathays Cardiff CF24 4DH

Change of use to class C4 House in Multiple Occupation (HMO) with rear extensions and dormer loft conversion.

Full Planning Permission Cardiff 12 May 2026
26/00958/CLEUD 12 May 2026 Registered

Rear Of 28 Ty-fry Road Rumney Cardiff CF3 3JN

Use of annexe as separate dwelling.

Cert of Lawfulness Existing (s191) Cardiff 12 May 2026
26/00907/FUL 7 May 2026 Registered

Oakhouse 340 Newport Road Penylan Cardiff CF24 1RT

Temporary permission for the retention and continued use of 4 no. pre-fabricated residential units

Full Planning Permission Cardiff 7 May 2026
26/00844/FUL 29 Apr 2026 Awaiting decision

12 Wellfield Road Roath Cardiff CF24 3PB

Change of Use of the rear ground floor from A1 shop to C3 one bedroom dwelling with external alterations.

Full Planning Permission Cardiff 29 Apr 2026
26/00838/FUL 28 Apr 2026 Registered

147 Clifton Street Adamsdown Cardiff CF24 1LZ

Proposed part conversion of basement and ground floor to form a flat (C3 Use).

Full Planning Permission Cardiff 28 Apr 2026
26/00819/CLPUD 24 Apr 2026 Decided

28 The Grove Rumney Cardiff CF3 3HG

Provide pet sitting services incidental to the residential use.

Cert of Lawfulness Proposed (s192) Cardiff 24 Apr 2026
26/00811/FUL 24 Apr 2026 Decided

Ground Floor 18 Windsor Place Cathays Cardiff CF10 3BZ

Change of Use of Ground Floor from Use Class B1 (Office) to Use Class D1 (Medical).

Full Planning Permission Cardiff 24 Apr 2026
26/00773/FUL 20 Apr 2026 Decided

185 - 187 Broadway Adamsdown Cardiff CF24 1QH

Change of Use from Retail Unit (A1 Use Class) into Restaurant with Ancillary Take Away (A3 Use Class) with the installation of extraction through the ...

Full Planning Permission Cardiff 20 Apr 2026
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Frequently asked questions

Do you need planning permission to run an HMO?
A small HMO (3-6 unrelated tenants, Class C4) usually doesn't need planning permission unless the area has an Article 4 direction. Larger HMOs (7+ tenants, 'sui generis') almost always need a full planning application.
What is Class E in planning?
Class E is the flexible commercial use class introduced in September 2020. It covers shops, offices, cafes, restaurants, gyms, clinics, nurseries and light industry. You can change uses freely within Class E without planning permission.
Can you convert offices to flats without planning permission?
Class MA permitted development rights let you convert Class E premises (including offices) to residential (Class C3) via a prior-approval application rather than full planning permission. Limits apply: max 1,500m², not in conservation areas or AONBs without additional consent.
Can I get email alerts for new change of use applications in Cardiff?
Yes. Click "Set up alerts" on this page and you'll get a daily or weekly email listing every new change of use application published by Cardiff. You can also narrow the alert to a postcode, street, or drawn area.

We check Cardiff's planning portal daily. New change of use applications appear here within a day of being published.