HMO Conversions Clapham

HMO conversion in Clapham is shaped more by licensing than by planning. Lambeth runs a borough-wide additional HMO licensing scheme that catches any property occupied by three or more individuals not covered by mandatory licensing, so a house shared by three or more unrelated people here is licensable. Turning a Clapham family house into a shared house, or bringing an existing one up to licence standard, therefore means building to room sizes, kitchen and bathroom numbers and fire safety that the licence will check.

Mandatory licensing does not reach a flat in a purpose-built block of three or more self-contained flats; where such a flat is shared, it is the council's additional scheme, if any, that applies.

In Clapham, 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 Clapham: 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 for a shared house in Clapham

A change from a Clapham family house to a small shared house can be permitted development. Class L of the General Permitted Development Order 2015 permits a change from Class C3 (dwellinghouses) to Class C4 (houses in multiple occupation). The London Plan classes HMOs for three to six people as C4 and those for more than six as Sui Generis. Class L does not allow one house to become two or more separate C4 HMOs.

An Article 4 direction can remove the Class L right, and the London Plan asks boroughs weighing such directions to consider the strategic as well as local importance of HMOs. The owner or their agent confirms with Lambeth whether one covers the address. Above six sharers the position is clear: Lambeth says that if you rent an HMO to seven or more people you need planning permission for a change of use. Where permission is needed, Lambeth Local Plan Policy H9 supports new HMOs only where, among other tests, they do not result in the loss of family housing.

Housing in Clapham

For Clapham the Council Tax list gives about 22,800 homes; by type 72% flats and 28% houses, by age 34% post-war, 6% interwar and 58% older than 1919.

Which HMO licence a Clapham house will need

Every shared house in Clapham falls under one licensing route or another. GOV.UK defines a large HMO as one rented to 5 or more people who form more than 1 household, and that needs a mandatory licence. Below that, Lambeth's additional HMO licensing scheme is borough-wide and applies to any property occupied by three or more individuals not caught by mandatory licensing. GOV.UK also says renting out an unlicensed HMO can lead to an unlimited fine.

The landlord applies for the licence, and Lambeth charges the fee per habitable room, so the room count on the drawings affects the application as well as the rent. We build to the licence standards the landlord gives us and hand over the fire alarm and emergency lighting certificates and the room measurements the application needs. Lambeth also lists Clapham Common and Abbeville, Clapham East, Clapham Park and Clapham Town among its Phase 2 selective licensing wards, so the landlord confirms with Lambeth which scheme the house falls under.

Room sizes and shared kitchens in a Clapham HMO

Bedroom sizes in a licensed Clapham HMO are set nationally, not by choice. Since 1 October 2018 national minimum room sizes have been mandatory licence conditions in England. A room slept in by one adult needs 6.51 square metres, a room for two needs 10.22, and no room under 4.64 square metres may be used for sleeping at all. The licence also sets the number of kitchens, bathrooms and WCs for the number of occupants, which the landlord confirms with Lambeth before the layout is fixed.

In a Victorian Clapham terrace, with 58% of homes here built before 1919, the rooms are generous at the front and small at the back, and the box room over the stair is often the one that fails. The ground floor usually becomes the shared kitchen and living room, and a second bathroom goes where the old back bedroom was. We set out partitions to the measured drawings and confirm each room's size before plastering.

Fire safety, sound and energy in a Clapham HMO

Fire safety is the core of an HMO conversion in Clapham. A shared house is judged against building regulations Part B and the LACORS housing fire safety guidance, the recognised guide for existing HMOs, together with any fire conditions in the licence. In practice that means a protected escape stair, self-closing fire doors to each bedroom and to the kitchen, a mixed smoke and heat detection system linked through the house, and fire stopping around pipes and cables in each floor.

Sharers also live closer together than a family, so sound matters. We add acoustic insulation to the stud walls between bedrooms and to the floors between storeys where the rooms stack. Energy rules apply too: since 1 April 2020 a landlord may not let, or continue an existing let, with an EPC rating below E unless a valid exemption is registered. Loft insulation, draught-proofing and heating controls go in while the Clapham house is stripped.

• Insulation and heating upgrades toward the minimum EPC for letting
• En-suite shower rooms added to bedrooms
• Shared kitchens enlarged or added for the number of occupants

VOA Council Tax stock of properties, March 2025, for all 6 statistical areas in Clapham. Counts rounded by the VOA.

People planning hmo conversions in Clapham may also want bathroom renovation in Clapham, hmo conversions across Lambeth, bathroom fitting in London, kitchen fitting in London, how we handle hmo conversions across London and Small Bathroom Ideas.

Why Choose GS Renovation in Clapham

An HMO conversion is judged by the licence inspection and the fire standard, so the building has to be right on the drawings and on site. We build the rooms, bathrooms, kitchen, fire doors, detection and separation to the standards the landlord gives us, and hand over the certificates and records the licence application needs. One point of contact runs the programme. The price follows a survey of the house. The licence and any planning application stay with the landlord.

• Article 4 and licence position checked before a room is priced
• Free follow-up visit after completion if anything needs attention
• Fire doors, closers and seals fitted to every door on the escape route

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