HMO Conversions Southall

An HMO conversion in Southall now starts with a planning application. Ealing's immediate Article 4 direction removed the right to turn a dwelling into a small HMO from 30 October 2024, and a non-immediate direction followed on 14 November 2025. It covers the borough apart from Perivale ward and the Old Oak and Park Royal Development Corporation area. After planning comes licensing, and Ealing's standards for shared houses then fix bedroom sizes, kitchens, bathrooms and fire safety. We build the shared house to the approved plans and the licence conditions, for landlords converting a family house or upgrading an existing HMO.

In Southall, a light HMO conversion for four to six tenants typically costs £40,000 to £75,000 in construction, or £90,000 to £150,000 with an en-suite to every bedroom (indicative London ranges, Mayfair Studio and LetCompliance, 2026). GS Renovation Ltd, a building contractor based in Potters Bar, does the work in Southall: we build the fire doors, detection, bathrooms and kitchens to the council's HMO standards, the landlord applies for the licence, and a registered electrician certifies the electrics.

Planning permission for a Southall HMO under Article 4

A Southall house can no longer become a small HMO under permitted development. Class L of the General Permitted Development Order allows a change from a C3 dwellinghouse to a C4 HMO, but Ealing's Article 4 directions take that right away. The non-immediate direction covers the whole borough apart from Perivale ward and the Old Oak and Park Royal Development Corporation area, so Southall is inside it. An HMO for more than six people is sui generis and needs planning permission in any case.

Ealing's HMO planning guidance is aimed at converting a C3 dwelling to a small C4 HMO of 3 to 6 occupants, and applications are assessed against the London Plan 2021, including Policy H9, and Ealing's Development Management DPD 2013. A Management Plan goes in with the drawings. Likely conditions fix the approved plans and room sizes and prevent later subdivision, so the Southall house cannot quietly gain a bedroom after the licence. We build exactly what was approved.

Housing in Southall

Count the homes in Southall and you get about 14,510: 23% built since 1945, 47% between the wars and 30% before 1919, with flats at 36% and houses at 64%.

Which licence a Southall HMO needs

While the current designation lasts, a Southall HMO of three or more people from more than one household needs one of Ealing's licences. Mandatory HMO licensing applies where five or more people not living as a single household share facilities. Below that, Ealing's additional HMO licensing scheme has covered HMOs let to 3 or 4 unrelated individuals since 1 April 2022, across the whole borough, and the designation ceases on 31 March 2027 unless revoked earlier. Ealing ran a consultation on additional HMO licensing from 15 July 2026 to 24 September 2026.

GOV.UK warns that renting out an unlicensed HMO can lead to an unlimited fine, so the licence and the build run together. Ealing property licences generally last 5 years where there has been no previous enforcement. The landlord or their agent applies for the licence. We build to the standards it sets and hand over the fire alarm, emergency lighting, electrical and gas certificates that the installers issue, so the Southall house is ready when the licensing officer inspects.

Room sizes, kitchens and bathrooms in a Southall HMO

Ealing's standards set the layout of a Southall HMO before any wall moves. The national mandatory licence conditions govern bedroom size: at least 6.51 square metres for one adult, 10.22 for two, and no sleeping room under 4.64 square metres. Ealing adds its own rule that a room under 6.5m2 is never slept in, a bedroom holds two people at most, and no bedroom may be reached through a shared kitchen. Floor area under a ceiling below 1.5m does not count towards occupant numbers, which catches bedrooms in a rear roof slope. For planning, Ealing expects bedrooms to meet the Nationally Described Space Standard and London Plan housing design guidance.

The mandatory scheme stops short of flats in purpose-built blocks of three or more self-contained flats, which only an additional licensing scheme can catch.

Shared space is fixed too. Ealing requires 1 kitchen and 1 bathroom per 5 occupiers, and its HMO planning guidance asks for a combined living, dining and kitchen area of at least 25 sqm for 3 people, rising to 31 sqm for 6. On an interwar Southall terrace that often keeps the front reception as shared space and puts a second shower room upstairs. We price the plumbing and drainage for those extra wet rooms before the layout is fixed.

Fire safety, sound and energy in a Southall shared house

Fire safety is the core of an HMO conversion in Southall. The escape route through the hall and stair is protected, bedroom doors become self-closing fire doors, and a mains-powered interlinked detection and alarm system covers the rooms and circulation. The layout follows building regulations Part B, Ealing's HMO fire standards and the LACORS housing fire safety guidance, which licensing officers use as the recognised guide. Kitchens get a heat detector and a fire blanket. The common parts fall under the Fire Safety Order, so the work needs full plans rather than a building notice.

Sound and energy come next. Sound insulation between bedrooms and between floors cuts disputes between tenants who keep different hours, so we add insulated stud walls and upgrade ceilings where the budget allows. Since 1 April 2020 a landlord cannot let a property covered by the MEES Regulations with an EPC rating below E without a valid exemption. A Southall HMO conversion is the time to insulate the roof, upgrade the boiler and fit room-by-room heating controls.

• Service holes sealed so each bedroom and the kitchen stay separate fire compartments
• Snagging before the council's licence inspection
• Hard-wearing floors, finishes and decoration for a let house

VOA Council Tax stock of properties, March 2025, for all 5 statistical areas in Southall. Counts rounded by the VOA.

If you are weighing up options for your Southall property, it is worth reading bathroom renovation in Southall, hmo conversions across Ealing, what a main building contractor does, kitchen fitting in London, hmo conversions across London and How to Choose a Builder.

The GS Renovation Difference in Southall

An HMO conversion has three sets of rules working on the same house: the planning approval, the licence conditions and the building regulations. We build from one set of drawings that satisfies all three, so the room sizes planning fixed are the ones built and the fire doors and alarms are the ones the licensing officer checks. You get a written programme, a certificate file for the licence application your agent submits, and one team from strip-out to handover. As a landlord converting to let, you are a commercial client under the CDM Regulations, with duties of your own.

• Fire doors, closers and seals fitted to every door on the escape route
• Aftercare and snagging support once the job is finished
• Detection laid out to the grade the council's HMO fire guidance sets

Checked by Abdelaaziz Saaid, founder and director of GS Renovation Ltd (Companies House no. 14611254).