A large HMO is a shared house for seven or more people. For a house in Carshalton we start with a measured survey, check the council’s written HMO standards for the number of sharers, and then price each item separately.
- Area
- Greater London, England
- Postcodes
- CR4, SM5 and SM6
- Location
- 10 miles south of London
- Pricing region
- London
What do large HMO conversions (7+ sharers) in Carshalton involve?
- Emergency lighting where the escape route needs it
- Second kitchen or extra kitchen capacity
- Ensuites or extra bathrooms
- Feasibility review and measured survey
- Planning and building control drawings, coordinated with your designer
Which rules apply in Carshalton?
The rules below are the England-wide position for this kind of work. Councils add their own standards and schemes on top, so we always check the address in Carshalton before we price.
- Mandatory HMO licence for 5 or more people in 2 or more households (since October 2018); councils can add additional licensing for smaller HMOs.
- Licensed HMOs must meet national minimum bedroom sizes: 6.51 m² for one person aged 10 or over, 10.22 m² for two, and 4.64 m² for a child under 10.
- Council standards often step up at 5 and 6 sharers, for example a separate WC at 5 and a second bathroom from 6.
- 3–6 unrelated sharers is use class C4; changing from a family house is usually permitted development unless an Article 4 direction applies.
How much do large HMO conversions (7+ sharers) cost in Carshalton?
| Item | UK typical | Local guide | Per |
|---|---|---|---|
| Conversion works per letting room (walls, linings, electrics, decoration; excludes kitchens, bathrooms and fire systems; our estimate) | £3,500 – £6,500 | £4,500 – £8,300 | letting room |
| Panel alarm system (Grade A type), larger HMO | £1,750 – £4,500 | £2,250 – £5,750 | house |
| Protected route upgrades: fire-resisting linings, fire stopping, lighting (three-storey house, our estimate) | £2,000 – £6,000 | £2,550 – £7,700 | house |
| Ensuite shower room added to a bedroom | £4,000 – £10,000 | £5,100 – £12,800 | ensuite |
| Communal HMO kitchen with extra cooking and sink capacity (our estimate from domestic ranges) | £8,000 – £18,000 | £10,250 – £23,050 | kitchen |
These are typical ranges including VAT, adjusted for London, where costs run above the UK average. The fixed price for a house in Carshalton follows a site visit.
How long does it take?
Most jobs of this kind take 10–20 weeks. If a council deadline applies in Carshalton, tell us at the first call so the programme is built around it.
When do Carshalton landlords need it?
Landlords in Carshalton most often ask us for this when:
- A large house, three or more storeys, or a building with lots of rooms
- You have planning in place, or want to apply
Questions about large HMO conversions (7+ sharers) in Carshalton
Does a seven-bed HMO need planning permission?
In England, normally yes: seven or more unrelated sharers is a sui generis use outside class C4. Wales and Northern Ireland require permission for new HMOs anyway, and in Scotland more than five residents falls outside the houses class. Councils also apply concentration policies, so we check the address first.
Do you cover all of Carshalton?
Yes. We work across Carshalton and the CR4, SM5 and SM6 postcode areas, plus the rest of Greater London. Nearby places we also cover include Wallington, Sutton, Mitcham.
Where do I check the HMO rules for an address in Carshalton?
With the local council for the address. Councils in England can add additional licensing and Article 4 directions on top of the national rules. Check the council’s website for the exact address before you buy or start work.
How much do large HMO conversions (7+ sharers) cost in Carshalton?
Our guide ranges for London are in the table on this page, and the guide-price tool gives a figure for your house. A fixed written quote follows a free site visit.
Large HMO conversions (7+ sharers) near Carshalton
- Wallington · 1 mi
- Sutton · 2 mi
- Mitcham · 2 mi
- Morden · 2 mi
- Croydon · 3 mi
- South Croydon · 3 mi
- All of Greater London
Other HMO services in Carshalton
- House to HMO conversion in Carshalton
- Escape routes, emergency lighting and fire stopping in Carshalton
- Fire alarm and detection systems in Carshalton
- Sound insulation in Carshalton
- Loft conversions for extra rooms in Carshalton
- Extensions for extra rooms in Carshalton
- Void and between-tenancy refurbs in Carshalton
- Bedroom upgrades and room refits in Carshalton