Change of use applications in Cardiff

There were 206 change of use applications in Cardiff in the last 12 months. 53 involve HMOs. Of the 114 decided so far, 106 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 50 of 75 applications
2 days ago Pending 26/01990/CLEUD

5 Talworth Street Roath Cardiff CF24 3EH

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

Cert of Lawfulness Existing (s191) Cardiff
8 Sept 2026 Pending 26/01887/FUL

276 North Road Gabalfa Cardiff CF14 3BL

Conversion first and second floors from one flat to two with roof lights added.

Full Planning Permission Cardiff
7 Sept 2026 Registered 26/01870/FUL

7 Colum Place Cathays Cardiff CF10 3EP

Change of use from a dwelling to a childrens home

Full Planning Permission Cardiff
7 Sept 2026 Pending 26/01877/CLEUD

10 Brithdir Street Cathays Cardiff CF24 4LG

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

Cert of Lawfulness Existing (s191) Cardiff
7 Sept 2026 Pending 26/01878/FUL

St Julians Forge Bridge Road Old St Mellons Cardiff CF3 6YJ

Proposed conversion and extensions of existing annex to form a dwelling house & erection of a detached bungalow

Full Planning Permission Cardiff
4 Sept 2026 Pending 26/01814/FUL

Flat 1 Conway Court 18 Penhill Road Pontcanna Cardiff CF11 9PR

Change of use from a Class C3 dwellinghouse to a Class C4 House in Multiple Occupation, for occupation by three unrelated persons

Full Planning Permission Cardiff
4 Sept 2026 Pending 26/01837/FUL

12 Seymour Street Splott Cardiff CF24 2NQ

Change of use from a dwellinghouse to a class C4 House in Multiple Occupatio (HMO).

Full Planning Permission Cardiff
2 Sept 2026 Registered 26/01845/FUL

1 Churchill Villas Churchill Way Cathays Cardiff CF10 2EA

Change of use to body piercing studio with ancillary use (jewellery sales)

Full Planning Permission Cardiff
1 Sept 2026 Pending 26/01844/FUL

125 Maindy Road Cathays Cardiff CF24 4HN

Change of Use from Dwellinghouse (C3) to 4-Person House in Multiple Occupation (HMO) (C4)

Full Planning Permission Cardiff
1 Sept 2026 Registered 26/01848/FUL

Ty Mawr Farm Graig Road Lisvane Cardiff CF14 0UF

Completion of existing, part built stables with change of for part of the completed building for pet crematorium with change of use of existing log ca...

Full Planning Permission Cardiff
31 Aug 2026 Pending 26/01838/FUL

48 May Street Cathays Cardiff CF24 4EX

Conversion from Class C3 house to large sui generis house in multi-occupation

Full Planning Permission Cardiff
31 Aug 2026 Pending 26/01839/FUL

56 Crwys Road Cathays Cardiff CF24 4NN

First floor rear extension, rear dormer loft conversion and conversion of upper floors to 2 flats

Full Planning Permission Cardiff
28 Aug 2026 Pending 26/01831/FUL

Unit 23B Ely Distribution Centre Argyle Way Caerau Cardiff CF5 5NP

Change of use of existing industrial unit to mot testing station and motor vehicle repair workshop

Full Planning Permission Cardiff
26 Aug 2026 Pending 26/01820/FUL

6 North Road Cathays Cardiff CF10 3DU

Conversion of office building into a Sui Generis House in Multiple Occupation (HMO)

Full Planning Permission Cardiff
21 Aug 2026 Registered 26/01780/FUL

3 Wharton Street Cathays Cardiff CF10 1AG

Change of use from Class A1 (Shop) to Class A3 (Food and Drink)

Full Planning Permission Cardiff
20 Aug 2026 Registered 26/01770/FUL

46A Tudor Street Riverside Cardiff CF11 6AJ

Change of use of upper floors from existing HMO to 2 no. 2 bedroom self -contained flats and 4 no. studio flats to first and second floors

Full Planning Permission Cardiff
20 Aug 2026 Approved 26/01773/CLEUD

32 Connaught Road Roath Cardiff

Use of the property as 5 residential care flats (Class C2).

Cert of Lawfulness Existing (s191) Cardiff
20 Aug 2026 Awaiting decision 26/01774/CLEUD

57 Connaught Road Roath Cardiff CF24 3PW

Use of the property as 4 residential care flats (Class C2).

Cert of Lawfulness Existing (s191) Cardiff
20 Aug 2026 Approved 26/01775/CLEUD

62 Cottrell Road Roath Cardiff CF24 3EZ

Use of the property as 2 residential care flats (Class C2).

Cert of Lawfulness Existing (s191) Cardiff
18 Aug 2026 Registered 26/01754/FUL

8 - 10 North Road Cathays Cardiff CF10 3DY

Conversion of a disused D1 Building (Office) to 3 x C4 Units and 1 x Sui Generis HMO

Full Planning Permission Cardiff
11 Aug 2026 Approved 26/01705/CLPUD

390 Cyncoed Road Cyncoed Cardiff CF23 6SA

Use of 390 Cyncoed Road as residential accommodation for up to six adults with mental health conditions, living together as a single household, with c...

Cert of Lawfulness Proposed (s192) Cardiff
11 Aug 2026 Registered 26/01643/FUL

57 Oakfield Street Roath Cardiff CF24 3RF

Conversion of a 2 bedroom flat into a five bedroom c4 house in multiple occupation with rear garden assigned to HMO with bin and bike storage faciliti...

Full Planning Permission Cardiff
11 Aug 2026 Registered 26/01709/FUL

Unit B 122 - 130 Albany Road Roath Cardiff CF24 3RU

Change of use of the ground floor commercial unit from Class A1 (retail) to Class A2 (financial and professional services) for use as a letting and pr...

Full Planning Permission Cardiff
11 Aug 2026 Registered 26/01708/FUL

Ground Floor 37 Whitchurch Road Gabalfa Cardiff CF14 3JN

Change of use from tanning salon to proffesional advice/solicitor serivces

Full Planning Permission Cardiff
10 Aug 2026 Registered 26/01699/FUL

58 Crwys Road Cathays Cardiff CF24 4NN

Conversion to three flats plus retaining shop unit with single storey and two storey rear extensions, new shop front, and rear dormer loft conversion.

Full Planning Permission Cardiff
10 Aug 2026 Registered 26/01698/FUL

8 Harriet Street Cathays Cardiff CF24 4BY

Ground floor rear extension, dormer loft conversion and change of use from Class C4 HMO to large sui generis HMO.

Full Planning Permission Cardiff
5 Aug 2026 Approved 26/01662/CLEUD

2 Llantwit Street Cathays Cardiff CF24 4AJ

Use of the property as four self-contained flats.

Cert of Lawfulness Existing (s191) Cardiff
5 Aug 2026 Approved 26/01658/FUL

124 City Road Roath Cardiff CF24 3DQ

Change of use to restaurant with ancillary take away use (A3 use class) with installation of extraction to the rear

Full Planning Permission Cardiff
4 Aug 2026 Approved 26/01649/FUL

16 Plas Newydd Whitchurch Cardiff CF14 1NR

Change of Use from Hairdressing Salon (Use Class A1 - Shop) to Beauty Salon (sui-generis) with ancillary laser treatments

Full Planning Permission Cardiff
4 Aug 2026 Approved 26/01653/FUL

168 Whitchurch Road Gabalfa Cardiff CF14 3NA

Change of use of part of the ground floor from D1 Non Residential, to A2 Professional Services.

Full Planning Permission Cardiff
3 Aug 2026 Registered 26/01571/FUL

Unit 15 Ground Floor 216 Penarth Road Leckwith Cardiff CF11 8NN

Change of use from business use to a place of worship.

Full Planning Permission Cardiff
31 Jul 2026 Registered 26/01626/VAR

4 Romilly Crescent Pontcanna Cardiff CF11 9NR

DEMOLITION OF EXISTING STORAGE AREA AND CONSTRUCTION OF DOUBLE AND SINGLE STOREY EXTENSION, EXTENDING EXISTING COFFEE AND WINE BAR AND FORMING FIRST F...

Variation of conditions Cardiff
31 Jul 2026 Registered 26/01629/HSE

2 Soberton Avenue Gabalfa Cardiff CF14 3NJ

Conversion of existing two storey coach house to one bedroom self contained annexe for dependent family member.

Householder Planning Permission Cardiff
31 Jul 2026 Registered 26/01622/FUL

Unit 20 Ely Distribution Centre Argyle Way Caerau Cardiff CF5 5NJ

Conversion of existing light industrial unit to variable size light industrial individual units with external alterations

Full Planning Permission Cardiff
30 Jul 2026 Registered 26/01617/FUL

1 Pen Y Bryn Way Gabalfa Cardiff CF14 3LE

Retrospective change of use from class C3 dwellinghouse to class C4 House in Multiple Occupation (HMO)

Full Planning Permission Cardiff
29 Jul 2026 Registered 26/01585/FUL

First, Second And Third Floor Of Oliver House 16 - 17 High Street Cardiff CF10 1AX

Change of use of first, second and third floor of Oliver House from Use Class B1 (office) to hotel (Use Class C1) with associated external alterations...

Full Planning Permission Cardiff
28 Jul 2026 Registered 26/01590/FUL

47 - 48 St Mary Street Cathays Cardiff CF10 1AD

Change of use of the entire property (ground, basement and upper floors) from Class A1 (shop) and Class B1 (office) to Class A3 (food and drink) to al...

Full Planning Permission Cardiff
27 Jul 2026 Registered 26/01573/FUL

32 Splott Road Splott Cardiff CF24 2DA

Change of Use of the Existing Building to a Community Office and Teaching Facility, Construction of a Single-Storey Rear Extension and Associated Exte...

Full Planning Permission Cardiff
23 Jul 2026 Registered 26/01537/FUL

First Floor 55 Whitchurch Road Gabalfa Cardiff CF14 3JP

Change of use of existing offices to living accomodation

Full Planning Permission Cardiff
23 Jul 2026 Awaiting decision 26/01531/FUL

60 Colum Road Cathays Cardiff CF10 3EH

Dormer Loft Conversion plus related alterations to convert existing class C4 HMO into a large sui generis HMO.

Full Planning Permission Cardiff
23 Jul 2026 Registered 26/01534/FUL

23 Gordon Road Roath Cardiff CF24 3AL

Retention of conversion from a large sui generis HMO to a class C4 HMO.

Full Planning Permission Cardiff
22 Jul 2026 Awaiting decision 26/01245/FUL

Red Balloon Nursery Circle Way East Llanedeyrn Cardiff CF23 9PZ

Change of use from nursery to House in Multiple Occupation (HMO).

Full Planning Permission Cardiff
21 Jul 2026 Registered 26/01510/FUL

66 Monthermer Road Cathays Cardiff CF24 4QY

Alterations and extensions to 8-bed HMO to form 4 x 1-bed apartments and 1 studio

Full Planning Permission Cardiff
20 Jul 2026 Approved 26/01382/CLEUD

23 Tewkesbury Street Cathays Cardiff CF24 4QQ

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

Cert of Lawfulness Existing (s191) Cardiff
20 Jul 2026 Registered 26/01408/VAR

Newbridge Inn Abergele Road Trowbridge Cardiff CF3 1RR

Proposed demolition of Public House & erection of new development to form flats with A1 commercial unit to part ground floor. (approved 03/12/2025 - 2...

Variation of conditions Cardiff
20 Jul 2026 Approved 26/01503/FUL

Platform Dumballs Road Butetown Cardiff

Change of use of Unit 2 to a dental practice (Class D1).

Full Planning Permission Cardiff
20 Jul 2026 Registered 26/01498/VAR

6 - 10 Romilly Crescent Pontcanna Cardiff CF11 9NP

Retention of alterations to external (authorised) seating area to front, including new canopy, raising/levelling of floor level, balustrade and associ...

Variation of conditions Cardiff
14 Jul 2026 Registered 26/01460/FUL

30 Courtenay Road Splott Cardiff CF24 2JQ

Change of use to large Sui Generis HMO

Full Planning Permission Cardiff
13 Jul 2026 Approved 26/01448/FUL

34 - 36 Monthermer Road Cathays Cardiff CF24 4RA

Use change from A2 to Sui Generis class as a tattoo studio.

Full Planning Permission Cardiff
10 Jul 2026 Approved 26/01445/FUL

20 Splott Road Splott Cardiff CF24 2BZ

Change of Use of Ground Floor Retail Unit (Class A1) to a Self-Service Launderette (Sui Generis) and Installation of New Shopfront and Flue

Full Planning Permission Cardiff
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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.