HMO Conversions Knightsbridge

With 83% of homes recorded as flats across the Hans Town and Brompton statistical areas that cover Knightsbridge, HMO work here can mean a shared flat as well as a shared house. Kensington and Chelsea licenses every privately rented home occupied by three or more people from two or more households who share facilities, and its own HMO standards set room and kitchen sizes above the national minimum. A project can mean bringing an existing shared flat or house up to those standards, or planning a new one around them, with the fire safety work at its centre.

In Knightsbridge, 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 Knightsbridge: 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.

Which Knightsbridge lets count as HMOs and need a licence

Any Knightsbridge flat or house let privately to three or more occupiers, from at least two households sharing a kitchen or bathroom, has to be licensed. That rule runs across Kensington and Chelsea, and the borough's Additional HMO licensing scheme, which picks up every HMO the mandatory scheme leaves out, began on 1 June 2023. The owner or their agent applies for the licence; we carry out the works the licence and the local standards require.

Mandatory licensing in the borough covers HMOs with five or more occupiers forming more than one household, but a purpose-built flat in a block of more than two self-contained flats falls under the Additional scheme instead. That matters in Knightsbridge, where much of the housing is in mansion blocks. One older category is treated differently: a building converted into flats that does not meet the 1991 Building Regulations, with at least a third of the flats privately rented, is an HMO but needs no licence here.

Housing in Knightsbridge

Around 10,560 homes make up Knightsbridge on the valuation list; 83% are flats and 17% houses, and 66% date from before 1919, 19% from between the wars and 15% from after 1945.

Kensington and Chelsea HMO room standards in Knightsbridge

The council has adopted its own HMO standards, set higher than the national floor, and they turn directly into building work in Knightsbridge. A bedroom for one occupant has to reach 8.5 square metres, a bedroom for two 11 square metres, and a shared kitchen 5.5 square metres, according to its guide for shared houses and flats in multiple occupation. Nationally, mandatory licence conditions set 6.51 square metres for one adult and 10.22 for two, and no room under 4.64 square metres may be slept in, so the borough figures are the ones to build to.

Bathrooms are set out in the same detail. Where four or fewer people share, the standard sets at least one WC per four persons, no more than one floor from each user. The shared house standard also sets a minimum bath of 1600mm x 700mm and a minimum shower of 800mm x 800mm. In a tall Knightsbridge terrace that floor rule often decides where a second WC goes. We measure every room at survey and mark up where partitions must move before pricing.

Planning for a new HMO or a change to an existing Knightsbridge HMO

A Knightsbridge house can move from a family home to a small HMO without an application only where national rules allow it. Class L of the General Permitted Development Order 2015 permits a change from Class C3 to Class C4 unless an Article 4 direction removes the right, so your designer checks whether one covers the address. The London Plan glossary defines C4 as an HMO for three to six people. Class L does not allow one house to become two or more separate C4 HMOs. An HMO for more than six people is Sui Generis and needs planning permission.

Existing HMOs are protected. Proposed main modification MM99 to Policy HO1 protects HMOs unless the loss of the HMO or its rooms falls under one of two exceptions. They are an upgrade to the council's HMO standards that loses some rooms, or a layout that cannot be upgraded to meet them. The London Plan asks boroughs to protect HMOs of a reasonable standard under Policy H9. Your designer confirms the planning position for the Knightsbridge property before we price the layout.

Fire doors, alarms and escape in a Knightsbridge shared house

Fire safety is a major item in an HMO upgrade, and in Knightsbridge it is shaped by the tall, narrow houses and the flats within blocks. The escape route through the hall and stair is protected with fire-resisting walls and ceilings, bedroom and kitchen doors become self-closing fire doors, and an interlinked fire detection and alarm system covers the escape route and the rooms the guidance calls for. The council's HMO fire standards and the LACORS housing fire safety guidance set the level for each layout.

Sound and energy come next. Bedrooms that share a wall or floor with another letting benefit from added insulation, and where a new wall is built between lettings it is specified for sound as well as fire. Where the HMO needs an EPC, for example when the whole house is let on one tenancy, the MEES rules apply. Since 1 April 2020 a covered property cannot be let below E without a valid exemption, and local authorities enforce the rules with a maximum fine per property.

• Protected escape routes through the hall, stair and landings
• Electrics extended to every bedroom, certified by a registered electrician
• En-suite shower rooms added to bedrooms

VOA Council Tax stock of properties, March 2025, for Hans Town and Brompton. Counts rounded by the VOA.

If you are weighing up options for your Knightsbridge property, it is worth reading bathroom renovation in Knightsbridge, hmo conversions across Kensington and Chelsea, bathroom fitting in London, kitchen fitting in London, our London hmo conversions page and Small Bathroom Ideas.

Trusted HMO Conversions in Knightsbridge

Landlords use GS Renovation for HMO work because we build from the licence conditions and the council's standards rather than from a guess. We measure every room against the borough's sizes, set out the fire doors, detection and protected route, and build the kitchens, bathrooms and WCs to the numbers the standards require. The landlord or their agent applies for the licence; we give them the drawings and programme they need. A registered electrician certifies the alarm and wiring, and you receive a written quotation after a site visit.

• Every bedroom measured against the national minimum room sizes
• Waste cleared as we go, not left piled up outside
• EPC upgrades done while the walls and floors are still open

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