HMO Conversions Balham

An HMO conversion in Balham is shaped by two Wandsworth rules as much as by the house. Wandsworth introduced additional HMO licensing on 1 July 2025, so its scheme now covers every HMO in the borough, and Policy LP29 supports new HMOs only where family housing is not lost. We build the bedrooms, kitchens, bathrooms and fire protection a landlord needs to meet the licence and the planning position, working from the drawings the owner's designer prepares.

In Balham, 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 Balham: 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 Balham HMO: C4, sui generis and LP29

A Balham house turned into shared housing is judged against Wandsworth Policy LP29 wherever planning permission is needed, for example an HMO for seven or more people. LP29, adopted in the Local Plan Partial Review on 4 March 2026, supports new HMOs only where they do not lose family housing as defined in Part A of Policy LP26, and where public transport access is PTAL 4 or higher. The policy also asks for access to suitable shops and services.

A small HMO for three to six people is Class C4, and Class L permits a change from C3 to C4 as permitted development. Class L does not let one house become two or more separate C4 HMOs. The London Plan asks boroughs weighing an Article 4 Direction on C3 to C4 changes to consider the strategic importance of HMOs. Check with Wandsworth whether any direction removes the Class L right at your Balham address before relying on it.

Housing in Balham

Count the homes in Balham and you get about 7,240: 24% built since 1945, 8% between the wars and 68% before 1919, with flats at 55% and houses at 45%.

Licensing a Balham HMO and what the licence changes

Every shared house let as an HMO in Balham needs a licence, whatever its size, and a licence is not planning permission. A large HMO rented to 5 or more people forming more than one household falls under mandatory licensing, and Wandsworth's additional scheme, in force since 1 July 2025, picks up the smaller HMOs mandatory licensing misses. The landlord applies; we build to the conditions. GOV.UK says renting out an unlicensed HMO can lead to an unlimited fine.

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.

The licence term is a reason to settle planning first. Wandsworth usually grants a property licence for five years, but a reduced term, usually one year, is likely where planning permission is required for HMO use or has been refused. For a Balham house of seven or more sharers, that makes the planning decision part of the business case, so the build is best programmed after it. We can price the fit-out on the proposed layout meanwhile, so the numbers are ready.

Room sizes, heights and amenities in a Balham shared house

The layout of a Balham HMO is set by Wandsworth's licence standards before any partition goes up. A room used for sleeping by one person aged over 10 must be at least 6.51 square metres, and by two people at least 10.22 square metres. Those are the national mandatory licence minimums, and no room under 4.64 square metres may be used for sleeping at all. A bedsit with its own kitchen facilities needs an extra 3.5 square metres on top. Habitable rooms need a height of 2.3 metres, with existing attic rooms allowed 2.14 metres over at least 75% of the room.

Amenities follow the head count. Where exclusive facilities cannot be provided, Wandsworth requires one bathroom or shower room, one toilet and one wash hand basin for every 5 occupants. In a Balham terrace the soil stack decides where new bathrooms can go, so the designer plans them first and the bedrooms around them. We set out partitions to the licence drawings, then plumb and tile to that plan. Kitchens are sized to the number of sharers the licence allows.

Fire safety, sound and energy rating in a Balham HMO

Fire protection is a large part of an HMO build in a Balham house. The escape route through the hall and stair is enclosed, bedroom and kitchen doors become self-closing fire doors, and a mains-wired, interlinked detection and alarm system is installed to the level set by the licence conditions. The LACORS housing fire safety guidance is the recognised guide, read with building regulations Part B. Old lath and plaster ceilings are upgraded where they do not give the fire resistance needed.

Sound and energy come next. Tenants in separate rooms hear each other, so walls and floors between lettings get insulation and a resilient layer. Wandsworth states that all HMOs must have an Energy Performance Certificate rated E or above under the Minimum Energy Efficiency Standard regulations, unless exempted. Insulating floors, lofts and walls while the house is open is the simplest moment to reach that rating, and heating controls for each room can be added at the same time.

• Interlinked smoke and heat alarms, mains-wired and graded to the council's HMO fire guidance
• En-suite shower rooms added to bedrooms
• Service holes sealed so each bedroom and the kitchen stay separate fire compartments

VOA Council Tax stock of properties, March 2025, for Balham and Nightingale Lane. Counts rounded by the VOA.

Plenty of Balham projects start with one job and grow, so it helps to see bathroom renovation in Balham, hmo conversions across Wandsworth, bathroom fitting in London, how snagging works at handover, how we handle hmo conversions across London and Getting Planning Permission.

Working With GS Renovation in Balham

You get a builder who works from the licence standards as the brief: room sizes, amenities, fire doors, alarms and escape route are set out from the licensing drawings and checked before plaster. We give you a written programme, coordinate the registered electrician for the alarm and wiring and a registered gas engineer for the heating, and hand over the certificates your licence application needs. The planning and licence applications stay with you or your agent.

• One point of contact on the phone, not a call centre
• Fire doors, closers and seals fitted to every door on the escape route
• Finished and snagged before the council's licence inspection

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