This page tracks the planning applications made for HMOs by searching through all of the applications.
There are currently 16 applications under consideration for HMOs.
In the last six months 3 have been approved, and 7 refused.
These figures were last updated today.
Read below to see why there are more applications than there have been before.
ⓘ Why are there more HMO applications than before?
HMO Planning Requirements Before December 2025
Before the new rules took effect, Hillingdon operated under a "two-tier" system based on the size and location of the property. Large HMOs—defined as properties housing seven or more unrelated people—were classified as sui generis and have always required a formal planning application across the entire borough.
However, small HMOs (housing between three and six people) were generally considered "permitted development". This meant owners could convert a family home into a small HMO without any planning permission, provided the property was not located in a restricted area.
Specifically, planning applications for small HMOs were only mandatory if the property was located within the former Brunel or Uxbridge South wards. In those two wards, an Article 4 Direction was already in place to protect the character of neighborhoods surrounding the university. In all other parts of the borough, these conversions could proceed without council oversight.
HMO Planning Requirements After December 2025
As of December 11, 2025, the council implemented a borough-wide immediate Article 4 Direction. This removed permitted development rights for small HMOs in all 21 wards of Hillingdon, eliminating the distinction between "hotspot" wards and the rest of the borough.
Now, every new HMO conversion, whether for three people or ten, requires a full planning application before the change of use can legally occur. This gives the council the power to assess every proposal against local policies regarding parking, waste storage, and the impact on residential amenity.
Why Planning Applications Have Increased
There are significantly more planning applications for HMOs today than a year ago because the council effectively closed the legal route that previously allowed small HMOs to be created without oversight. The increase is driven by three main factors:
Mandatory Compliance: New conversions in the 19 wards that previously allowed permitted development must now submit formal applications.
Regularisation: Landlords with existing small HMOs are now filing for Certificates of Lawful Use to officially document that their properties were established before the new restrictions began.
Increased Enforcement: The council now requires investigation into all HMO complaints to verify their planning status, as many small HMOs no longer have automatic rights to operate without permission.
Ward Statistics
Click column headers to sort. Hover over 'Other' to see details (e.g. Withdrawn, Appeals).
Change of use from Use Class C4 (House in Multiple Occupation) to a Sui Generis 7-bed, 7-person HMO and resubmission and extension of the approved dormer extension. Amendments to fenestration. Provision of refuse and cycle storage (part retrospective).
Validated: 26 Nov 2025(2 months ago)
Click to see the 9 applications older than 6 months ↓
Change of use from a dwellinghouse (Use Class C3) to a 6 person HMO (Use Class C4) (Application for a Certificate of Lawful Development for a Proposed Development).
Change of use from C4 small HMO to C3(b), erection of a single-storey rear extension following amendments to fenestrations (Application for a Certificate of Lawful Development for a Proposed Development)
Proposed conversion of existing dwellinghouse from Class C3 (single family dwellinghouse) to Class C4 (small scale HMO) with the addition of 1 obscure glazed window in the upper floor side elevation (Application for a Certificate of Lawful Development for a Proposed Development)
Validated: 11 Sep 2025(4 months ago)
Click to see the 21 applications older than 6 months ↓
Details pursuant to the discharge of Conditions 7 (Parking Provision) of planning permission ref. 75428/APP/2023/443, dated 19-05-23 (Conversion of Class C3 Dwellinghouse into 7B7P Sui Generis HMO with two storey side extension and part double storey rear extension)
Details pursuant to the discharge of Condition 3 (landscape scheme) of planning permission ref. 13428/APP/2024/992, dated 12-07-2024 (Change of use from Class C4 House in Multiple Occupation (HMO) to Sui Generis HMO (6 persons to 7) and conversion of the garage to habitable use with associated cycle parking to the front)
Change of use from a dwellinghouse (Use Class C3) to a House in Multiple Occupation (HMO) (Use Class C4) (Application for a Certificate of Lawful Development for an Existing Development)
Change of use from Class C3 (Dwellinghouse) to C4 (Small HMO) up to six persons (Application for a Certificate of Lawful Development for a Proposed Development)
Change of use of a single dwellinghouse (Class C3) to a 3 x bedroom HMO accommodation (Class C4) (Application for a Certificate of Lawful Development for a Proposed Development)
Conversion of roof to habitable accommodation to include a hip to gable roof extension and rear dormer and 2 side facing windows and alterations to fenestration. Change of use from a C3 dwelling to a 6-room House of Multiple Occupation (HMO) with retention of a self-contained annexe to be used as a separate dwelling.
Change of use from Class C3 (Dwellinghouse) to Class C4 (HMO) for a maximum of 6 persons (Application for a Certificate of Lawful Development for a Proposed Development)
Extension and conversion of first floor of 15b Station Road to a 6-bed HMO, change of use Class C3 (dwelling house) to Class C4 (HMO) including alterations to the existing first floor to provide external amenity space. Erection of ground floor retail (Class E) storage space and bike and bin storage.
Conversion from a residential dwellinghouse (Class C3) to a 6-bed HMO (Class C4) (Application for a Certificate of Lawful Development for a Proposed Use)
Validated: 19 Aug 2025(5 months ago)
Click to see the 9 applications older than 6 months ↓
Change of use from a Class C3 (Dwellinghouse) to a Class C4 (Small HMO) for up to 6 people(Application for a Certificate of Lawful Development for a Proposed Development)
Change of use from a dwellinghouse (Use Class C3) to a House in Multiple Occupation (HMO) (Use Class C4) for up to 6 people. (Application for a Certificate of Lawful Development for a Proposed Development).
Conversion of an existing house (Use Class C3) into an HMO (House in Multiple Occupation, Use Class C4) (Application for a Certificate of Lawful Development for a Proposed Development)
Conversion of first floor of 15b Station Road to a 3-bed HMO, change of use Class C3 (dwelling house) to Class C4 (HMO) including alterations to the existing first floor to provide external amenity space. Erection of ground floor retail (Class E) storage space
Change of use from Use Class C3 (Dwellinghouse) to a 7-Bedroom (9-person) House in Multiple Occupation (HMO) (Use Class Sui Generis)(Retrospective application)
Change of use from Class C3 (Dwelling) to Class C4 (HMO) including conversion of garage to habitable use (Application for a Certificate of Lawful Development for a Proposed Development).
Details pursuant to the discharge of Conditions 3 (Cycle Storage), 4 (Charging Point) and 5 (Waste Storage) of planning permission ref. 75939/APP/2022/3043, dated 17-11-2023 (Conversion of a 6 bed HMO to a 8 bed HMO (Sui Generis)
Conversion of dwelling to a 6-bedroom 9-person HMO. Erection of a rear first floor extension and loft conversion to include a rear dormer and hip to gable end. Private amenity space, refuse area, cycle/car parking.
Change of use from Use Class C3 (dwellinghouse) to Use Class C4, to form a six-bedroom, six-person House in Multiple Occupation (HMO) with cycle store, Erection of a single storey extension to the rear, Conversion of roof space to habitable use to include a rear dormer
Conversion of roof space to habitable use to include a hip to gable roof extension, rear dormer and 3 front roof lights, single storey rear extension and change of use to 5-bedroom 5-person House in Multiple Occupation (HMO) (Part retrospective application).
Validated: 11 Sep 2025(4 months ago)
Click to see the 4 applications older than 6 months ↓
Conversion of roofspace to habitable use to include a hip to gable roof extension, rear dormer and 3 front rooflights, single storey rear extension and change of use to 6bedroom 6person HMO.(Part retrospective).
Change of use from (C3 use class) to a small House in Multiple Occupation (HMO) (C4 use class) (Application for a Certificate of Lawful Development for a Proposed Development)
Proposed change of use from dwellinghouse (Use Class C3) to Houses in Multiple Occupation (HMO) for 6 Persons (Use Class C4), including alterations to the rear window and door (Application for a Certificate of Lawful Development for a Proposed Use and Development).
Conversion of an HMO (House in Multiple Occupation, (Use Class C4) into a Residential Institution, (Use Class C2) (Application for a Certificate of Lawful Development for a Proposed Development).
Details pursuant to the discharge of Condition 2 (Cycle parking, refuse) of Appeal Decision ref: APP/R5510/W/23/3319240, (Hillingdon Council ref. 27994/APP/2021/3851), dated 24-01-2024 (Change of use from Class C4 house in multiple occupancy (HMO) to Sui Generis HMO for 7 bed and 7 persons with no external alterations.)
Details pursuant to the discharge of Condition 2 (Cycle parking, refuse) of Appeal Decision ref: APP/R5510/W/23/3319240, (Hillingdon Council ref. 27994/APP/2021/3851), dated 24-01-2024 (Change of use from Class C4 house in multiple occupancy (HMO) to Sui Generis HMO for 7 bed and 7 persons with no external alterations.)
Change of use from a 5-bedroom residential property (Class C3) to an 8 bedroom HMO (Sui Generis) with associated amendments to front garden and car parking.
Change of use from Class C3 (Dwellinghouse) to C4 (Small HMO) up to six persons (Application for a Certificate of Lawful Development for a Proposed Development)
Existing use of the property as a Small HMO Class C4 (HMO) for up to 6 persons. (Application for a Certificate of Lawful Development for a Existing Use)
Change of use from Class C3 (Dwellinghouse) to Class C4 (Small Scale HMO), along with the erection of a single storey rear extension (Application for a Certificate of Lawful Development for a Proposed Development)
Validated: 11 Nov 2025(2 months ago)
Click to see the 5 applications older than 6 months ↓
Change of use from (C3 Use Class) to a small House in Multiple Occupation (HMO) (C4 Use Class) (Application for a Certificate of Lawful Development for a Proposed Development)
Change of use from existing 6-bed, 6-person HMO (Use Class C4) to a 7-bed, 7-person HMO (Use Class Sui Generis) with associated refuse and cycle storage provision
Proposed change of use from a Residential dwelling (Class C3) to a 6-persons max small HMO (Class C4) (Application for a Certificate of Lawful Development for a Proposed Development)
Proposed change of use from C3( Residential Family Dwelling) to C4 for 6 persons max (Small HMO) (Application for a Certificate of Lawful Development for a Proposed Development)
Change of use from Class C3 dwellinghouse to C4 HMO for up to 6 persons. (Application for a Certificate of Lawful Development for a Proposed Development)
Validated: 29 Dec 2025(28 days ago)
Click to see the 12 applications older than 6 months ↓
Details pursuant to the discharge of Conditions 5 (Bicycle Storage) of planning permission ref. 47363/APP/2023/1245, dated 22-06-2023 (Change of use from a Class C4 (HMO) to a Sui Generis 6-bed, 7 person HMO with the conversion of roof space to habitable use to include a rear dormer and one front roof light; including associated bin and bike storage).
Conversion of roof space to habitable use, including the construction of a rear dormer and from hip to gable end roof extension. Change of use from dwellinghouse (Use Class C3) to House in Multiple Occupation (Use Class C4) (maximum six-person HMO) (Application for a Certificate of Lawful Development for a Proposed Development)
Erection of a single storey wrap around extension to the side and rear, conversion of roof space to habitable use to include raising the ridge height, 2no front dormers, 2no side dormers, 2no rear dormers, amendments to fenestrations, installation of 2no EV charging units, 2no bike stores, following the demolition of the existing 2no front dormers, and a change of use from C3 (Dwelling) to Sui-generis (HMO).
Construction of rear extension, hip-to-gable roof conversion and rear dormer, and conversion of property from Class C3 (dwellinghouse) to Class C4 (small HMO) for up to 6 persons (Part-Retrospective).
Validated: 23 Dec 2025(1 month ago)
Click to see the 2 applications older than 6 months ↓
Conversion of existing residential dwelling (Class C3) into a 6-bedroom HMO (Class C4) (Application for a Certificate of Lawful Development for a Proposed Development).
Change of use from a Class C4 small HMO to an 8-person Sui Generis large HMO including erection of a first floor rear extension with amendments to fenestration and associated alterations (revised description 15.08.25)
Validated: 01 Aug 2025(5 months ago)
Click to see the 3 applications older than 6 months ↓
Confirmation of change of use from a dwellinghouse (Use Class C3) into a House in Multiple Occupation (HMO) (Use Class C4) (Application for a Certificate of Lawful Development for a Proposed Use)
Conversion of an existing house (Use Class C3) into a House in Multiple Occupation (HMO) (Use Class C4) (Application for a Certificate of Lawful Development for a Proposed Use)
Confirmation of continuous use of the property as a C4 HMO for 6 people. Erection of single-storey side extension. Erection of single-storey rear extension. (Application for a Certificate of Lawful Development for an Existing Development)
Change of use from Class C3 (Dwellinghouse) to Class C3 (HMO) for up to 6 persons, Erection of single-storey rear and side extension, including cycle storage and bin storage to the front.
Erection of a single storey side and rear wrap around extension, insertion of window to first floor flank wall, change of use from single family residential to 5 bed 5 person HMO.
Validated: 20 Oct 2025(3 months ago)
Click to see the 14 applications older than 6 months ↓
Details pursuant to the discharge of Condition 4 (Electric Charging Point), Condition 5 (Car Parking Layout) and Condition 6 (Landscaping) of planning permission ref. 27891/APP/2022/2859, dated 30-08-23 (Conversion of existing 6 people Class C4 HMO to a 7 people Sui Generis HMO).
Change of use from a dwellinghouse (Use Class C3) to a House in Multiple Occupation (HMO) (Use Class C4) (Application for a Certificate of Lawful Development for a Proposed Development).
Change of use of the existing dwelling (Use Class C3) to a 6-person HMO (Use Class C4) and erection of a single-storey rear extension (Application for a Certificate of Lawful Development for a Proposed Use or Development)
Change of use from Class C3 (Dwellinghouse) to Class C4 (HMO) for a maximum of 6 persons (Application for a Certificate of Lawful Development for a Proposed Development)
Validated: 01 Dec 2025(1 month ago)
Click to see the 9 applications older than 6 months ↓
Change of use from a Class C4 dwellinghouse (small HMO) to 2 x 1-bed flats (Class C3) (Dwellinghouse) (Application for a Certificate of Lawful Development for a Proposed Development)
Change of use of a dwellinghouse (Use Class C3) to a four-bedroom six-person House in Multiple Occupation (HMO) (Use Class C4) (Application for a Certificate of Lawful Development for a Proposed Use)
Change of use from (C3 Use Class) to a small House in Multiple Occupation (HMO) (C4 Use Class) (Application for a Certificate of Lawful Development for a Proposed Development)
Validated: 14 Aug 2025(5 months ago)
Click to see the 5 applications older than 6 months ↓
Details pursuant to the discharge of Conditions 3 (refuse storage), 4 (cycle storage) and 5 (charging point) of planning permission ref. 70356/APP/2022/2654, dated 28-03-2023 (Change of use from a 6 unit small HMO (Use Class C4) to a 7 unit HMO (Sui Generis) for up to 7 people with amendments to the existing rear extension)
Change of use from residential house (Class C3) to a 4-bed House in Multiple Occupation (HMO) (Class C4) (Application for a Certificate of Lawful Development for a Proposed Use)
Conversion of roof space to habitable use to include rear dormer. Change of use from Class C3 (Dwelling) to Class C4 (Small HMO) (Application for a Certificate of Lawful Development for a Proposed Development)
Erection of a rear dormer and conversion of roof from hip to gable end. Change of use to use from residential property (Class C3) to an 7 bedroom HMO (Sui Generis).
Erection of a single storey extension to the rear, change of use from C3 residential to C4 6 person HMO (Application for a Certificate of Lawful Development for a Proposed Development).
Change of use from a dwellinghouse (Use Class C3) to a House in Multiple Occupation (HMO) (Use Class C4) (Application for a Certificate of Lawful Development for an Existing Development).