Change of use applications in Cardiff

There were 249 change of use applications in Cardiff in the last 12 months. 67 involve HMOs. Of the 151 decided so far, 139 were approved. Change of use covers conversions between planning use classes: shops to flats, offices to homes, houses to HMOs or care homes.

Date received
Get alerts for Cardiff

Filter applications

Date receivedLast 90 days
Date receivedLast 90 days
Select one year, or two for a range.
Number of homesAny
StatusAny
Application routeAny
Application type1 selected
KeywordsNone
Match

Matches words or phrases in the application address and description.

Showing 50 of 70 applications
15 Oct 2026 Registered 26/02188/FUL

62 Llantrisant Street Cathays Cardiff CF24 4JE

Conversion of Class C4 HMO to large sui generis house with dormer loft conversion

Full Planning Permission Cardiff
15 Oct 2026 Registered 26/02193/CLEUD

221 Mackintosh Place Roath Cardiff CF24 4RP

Establish use as 4 flats

Cert of Lawfulness Existing (s191) Cardiff
15 Oct 2026 Registered 26/02179/FUL

28 Norbury Road Fairwater Cardiff CF5 3AU

Change of use of the existing commercial premises from B1/B2 use to D2 (Assembly and Leisure) to operate as a recovery and wellness facility (Elevate ...

Full Planning Permission Cardiff
14 Oct 2026 Registered 26/02165/FUL

110 Maindy Road Cathays Cardiff CF24 4HQ

Change of Use from Single Dwelling house, to a Six-Bedroom HMO. Erection of a Two-Storey Rear Extension, Rear Dormer Roof Extension and Installation o...

Full Planning Permission Cardiff
13 Oct 2026 Registered 26/02159/CLEUD

Unit 2 64-75 St Mary's Street Cardiff CF10 1FA

Use of Unit 2 as mixed class A3 and class D2 use

Cert of Lawfulness Existing (s191) Cardiff
12 Oct 2026 Registered 26/02139/CLPUD

32 Clive Street Grangetown Cardiff CF11 7JB

Use of the property as a supported living residence for no more than six residents.

Cert of Lawfulness Proposed (s192) Cardiff
12 Oct 2026 Registered 26/02014/FUL

1 And 3 Soberton Avenue And Land To The Rear Gabalfa Cardiff CF14 3NJ

Conversion from 4 to 9 flats with ground floor rear and side extensions, first floor rear extensions and rear dormer loft conversions. Demolition of r...

Full Planning Permission Cardiff
7 Oct 2026 Registered 26/02152/FUL

70 May Street Cathays Cardiff CF24 4EY

Ground floor rear extension, rear dormer extension and change of use from class C4 House in Multiple Occupation (HMO) to large Sui Generis house.

Full Planning Permission Cardiff
5 Oct 2026 Registered 26/02099/FUL

20 Janet Street Splott Cardiff CF24 2BD

Proposed conversion of dwelling to form two flats

Full Planning Permission Cardiff
5 Oct 2026 Registered 26/02094/FUL

29 Cranbrook Street Cathays Cardiff CF24 4AL

Proposed construction of a dormer loft conversion and Change of Use from a Dwellinghouse (Use Class C3) to House in Multiple Occupation (Use Class C4)...

Full Planning Permission Cardiff
5 Oct 2026 Registered 26/01813/FUL

27 Gelligaer Street Cathays Cardiff CF24 4LD

Retrospective change of use to a C4 House in Multiple Occupation (HMO)

Full Planning Permission Cardiff
2 Oct 2026 Registered 26/02087/FUL

44 Blanche Street Adamsdown Cardiff CF24 1QT

Change of use of an existing four-bedroom dwellinghouse to a five-bedroom HMO with minor associated alterations

Full Planning Permission Cardiff
2 Oct 2026 Registered 26/02041/FUL

74 Wyndham Crescent Pontcanna Cardiff CF11 9EF

Change of use from accountancy office back to single residential dwelling.

Full Planning Permission Cardiff
1 Oct 2026 Registered 26/02044/FUL

50 Hendre Road Trowbridge Cardiff CF3 1QW

Change of use to House in Multiple Occupation (HMO)

Full Planning Permission Cardiff
30 Sept 2026 Registered 26/01932/FUL

84 Manor Way Whitchurch Cardiff CF14 1RL

Convert garage into short-term visitor accommodation.

Full Planning Permission Cardiff
29 Sept 2026 Registered 26/02064/FUL

87 Pearl Street Adamsdown Cardiff CF24 1PL

Change of use of the existing ground-floor takeaway to a self-contained two-bedroom flat, with retention of the existing first-floor flat and associat...

Full Planning Permission Cardiff
28 Sept 2026 Registered 26/02050/CLPUD

First And Second Floor 85 Romilly Crescent Pontcanna Cardiff CF11 9NQ

Change of use from Residential to C6 short-term let.

Cert of Lawfulness Proposed (s192) Cardiff
28 Sept 2026 Registered 26/02002/CLPUD

Ground Floor Flat 85 Romilly Crescent Pontcanna Cardiff CF11 9NQ

Change of use from Residential to C6 short-term let.

Cert of Lawfulness Proposed (s192) Cardiff
23 Sept 2026 Registered 26/02013/FUL

46 Beresford Road Adamsdown Cardiff CF24 1RA

Change of use to Sui Generis House in Multiple Occupation (HMO) with associated works.

Full Planning Permission Cardiff
22 Sept 2026 Registered 26/01886/FUL

Waypointe Letty Street Cathays Cardiff CF24 4EL

Change of use from student accomodation to C4 co-living accommodation.

Full Planning Permission Cardiff
21 Sept 2026 Registered 26/01992/FUL

10 Sneyd Street Pontcanna Cardiff CF11 9DL

Retain existing retail unit, and conversion into 3no. flats.

Full Planning Permission Cardiff
18 Sept 2026 Registered 26/01980/VAR

Kings Castle 74 Cowbridge Road East Riverside Cardiff CF11 9DU

Change of use and sub-division of public house (A3) to create restaurant (A3) and separate retail unit (A1) at ground floor and conversion of existing...

Variation of conditions Cardiff
16 Sept 2026 Registered 26/01964/FUL

332 Newport Road Penylan Cardiff CF24 1RT

Retrospective change of use from dwellinghouse (Use Class C3) to a 5-person House in Multiple Occupation (Use Class C4).

Full Planning Permission Cardiff
16 Sept 2026 Awaiting decision 26/01962/CLEUD

47 Lisvane Street Cathays Cardiff CF24 4LH

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

Cert of Lawfulness Existing (s191) Cardiff
15 Sept 2026 Approved 15 Oct 26/01931/FUL

The Whitchurch Clinic First Floor 2A Merthyr Road Whitchurch Cardiff CF14 1DG

Retrospective change of use from approved B1/D1 use to a beauty salon.

Full Planning Permission Cardiff
11 Sept 2026 Registered 26/01917/FUL

8 The Retreat Penylan Cardiff CF23 5QZ

Proposed conversion of roof space, side & rear extensions & internal alterations to form a HMO

Full Planning Permission Cardiff
11 Sept 2026 Registered 26/01918/FUL

56 Miskin Street Cathays Cardiff

Conversion to four flats with ground floor rear extension and rear dormer loft conversion.

Full Planning Permission Cardiff
11 Sept 2026 Registered 26/01865/FUL

50 - 52 Station Road Llanishen Cardiff CF14 5LU

Change of use of the former Natwest bank to a bar (Planning Use Class A3), with sale of alcohol on and off the premises.

Full Planning Permission Cardiff
10 Sept 2026 Registered 26/01912/FUL

Welsh Evangelical Church 110 Harriet Street Cathays Cardiff CF24 4BX

Partial demolition of church hall and conversion to 2no. 6 bed C4 HMOs; two storey side extension for use as 2no. 1 bed duplex apartments, including r...

Full Planning Permission Cardiff
10 Sept 2026 Registered 26/01914/FUL

9 Redlaver Street Grangetown Cardiff CF11 7LY

Retention of single storey rear extension, rear dormer loft conversion and external alterations (previously approved under reference 24/02360/FUL rela...

Full Planning Permission Cardiff
9 Sept 2026 Approved 22 Sep 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 Registered 26/01890/FUL

161 North Road Mynachdy Cardiff CF14 3AG

Conversion into 3no. self-contained flats and 1no. studio apartment with single storey rear and side extension and rear dormer.

Full Planning Permission Cardiff
8 Sept 2026 Registered 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 Awaiting decision 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 Approved 22 Sep 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 Registered 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 Registered 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 Registered 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 Approved 29 Sep 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 Registered 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 Registered 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 Registered 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 Withdrawn 2 Oct 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 Registered 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
24 Aug 2026 Approved 19 Oct 26/01797/FUL

St Andrews United Reformed Church Wellfield Road Roath Cardiff CF24 3PB

Change of use of part of the existing church courtyard to allow siting and operation of a mobile coffee van

Full Planning Permission Cardiff
21 Aug 2026 Approved 2 Oct 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 the upper floors from an existing House in Multiple Occupation (HMO) to 2 no. two-bedroom flats, together with the erection of a two-...

Full Planning Permission Cardiff
20 Aug 2026 Approved 9 Sep 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 Approved 9 Sep 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
Recency
Last 2 weeks
2-4 weeks
1-2 months
Older

Get free email alerts for new change of use applications in Cardiff

Set up alerts

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.