HMO Conversions Barnet

HMO conversion in Barnet means turning a family house into a shared house for unrelated tenants, or bringing an existing HMO up to licence standard. Barnet is one of the boroughs where the permitted development shortcut has gone: a borough-wide Article 4 Direction put in place in May 2016 requires planning permission for all future HMOs. The landlord or their agent applies for permission and any licence. We build to the conditions: fire doors, detection, escape routes, kitchens, bathrooms and room layouts.

In Barnet, 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 Barnet: 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.

Barnet's HMO Article 4 direction and what it changes

Barnet Council records a borough-wide Article 4 Direction put in place in May 2016 that requires planning permission for all future HMOs. Nationally, Class L of the General Permitted Development Order lets a C3 house become a small C4 HMO without an application, so the direction removes that shortcut here. The Planning Data record for the direction gives a start date of 2016-05-29. If a house in Barnet is already in lawful HMO use, keep the evidence, because a certificate of lawfulness rests on it.

For a house owner, this means the change of use is decided before any building work is priced in detail. Your agent or designer prepares the application and the layout, and we build to the drawings once permission is granted. The council also says it will take enforcement action against unauthorised and illegal HMO properties, so starting works on a shared house before consent puts the whole spend at risk.

Housing in Barnet

Barnet has around 160,480 homes on the Council Tax list: 46% post-war, 34% interwar and 20% predate 1919, with 50% flats and 50% houses.

HMO licensing and the register Barnet Council keeps

Planning permission and licensing are separate hurdles in Barnet. GOV.UK defines an HMO as a property rented out by at least 3 people who are not from 1 household but share facilities such as the bathroom and kitchen. A large HMO is one rented to 5 or more people forming more than 1 household, and that needs a mandatory licence unless it is a flat in a purpose-built block of three or more flats. A smaller one may still need a licence depending on the council area, so the landlord checks the current position with Barnet Council.

Barnet Council publishes a register of properties licensed under its HMO Licensing Scheme, updated monthly, as section 232 of the Housing Act 2004 requires. Renting an unlicensed HMO can lead to an unlimited fine, so the licence conditions shape the build: room sizes, kitchen and bathroom numbers, fire doors, a detection system and escape routes. The landlord or their agent applies for the licence; we build the kitchens, bathrooms, fire separation and alarms the conditions call for.

Small and large HMOs in Barnet: C4 or sui generis

The number of tenants sets the planning route for a Barnet shared house. The London Plan glossary defines HMOs for three to six people as Use Class C4 and HMOs for more than six people as Sui Generis. A seven-bedroom house let to seven people is therefore not a C4 HMO at all, and needs planning permission on its own merits. Class L also does not permit a single C3 dwellinghouse to become two or more separate C4 HMOs, so one house cannot be split into two shared houses under that right.

London Plan Policy H9 says boroughs should take account of the role of HMOs in meeting housing needs and that HMOs of a reasonable standard should generally be protected. In Barnet the C4 and sui generis split matters less for planning than in many boroughs, because the borough-wide Article 4 Direction already requires planning permission for all future HMOs. It matters more for the licence, where a larger house brings more kitchens, bathrooms and fire protection. The designer fixes the occupancy first, and we price the build once it is.

Room sizes, fire safety and energy in a Barnet HMO

The national minimum room sizes are mandatory conditions of an HMO licence in England: 6.51 square metres for one adult, 10.22 for two, and no sleeping room under 4.64. In a Barnet house that decides how many lettable rooms the plan yields, because an interwar semi's box room can be too small to count. Kitchens, bathrooms and WCs are then sized to the number of occupants in the licence conditions, and we lay out the partitions and sanitaryware to the licensed numbers.

Fire safety is the heaviest part of the build. Bedroom doors become fire doors with self-closers, a mains-wired detection and alarm system covers the escape route and the kitchen, and the stair is protected as a route out. We follow Part B, the licence conditions and the LACORS housing fire safety guidance. Sound insulation between lettings and an EPC rating of at least E, the MEES bar for continuing lets, finish the Barnet specification.

• Snagging before the council's licence inspection
• Self-closing fire doors and frames to every bedroom and the kitchen
• Insulation and heating upgrades toward the minimum EPC for letting

VOA Council Tax stock of properties, March 2025, for all 42 statistical areas in Barnet. Counts rounded by the VOA.

Alongside hmo conversions in Barnet, the pages that usually help next are bathroom renovation in Barnet, our Barnet area guide, builders in Barnet, what a kitchen fit covers, hmo conversions across London and Small Bathroom Ideas.

Why Choose GS Renovation in Barnet

We build HMOs to the planning consent and the licence conditions, so the house is ready when the licensing officer inspects. We work from the approved layout, fit the fire doors, detection, emergency lighting where required, kitchens and bathrooms, and a registered electrician certifies the installation. You get one written programme, and we gather the fire alarm, electrical and gas certificates the licence application asks for, so the landlord can apply and let without chasing paperwork.

• Clean, tidy and reliable tradespeople
• EPC upgrades done while the walls and floors are still open
• Existing HMOs brought up to licence conditions, fire works first

Reviewed jobs near Barnet

2 MyBuilder reviews from Barnet, with each customer's own job title:

• Install new kitchen, Barnet, 15 Apr 2022 (5 out of 5)
• Bathroom Refurbishment, Barnet, 14 Oct 2021 (5 out of 5)

Read all 31 on our reviews page.

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