An HMO extension adds space to a shared house, usually a ground-floor bedroom with ensuite or a bigger communal kitchen. Landlords in Croydon (CR0, CR7 and SE25) usually come to us with a council letter, a fire risk assessment or a house they have just bought. We price from whichever you have.
- Area
- Greater London, England
- Postcodes
- CR0, CR7 and SE25
- Location
- 9 miles south of London
- Pricing region
- London
What do extensions for extra rooms in Croydon involve?
- Building control completion
- Foundations, structure and roof
- Planning route check and drawings
- Heating, insulation and glazing
- Kitchen or bedroom fit-out
Which rules apply in Croydon?
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 Croydon before we price.
- 7 or more sharers is a sui generis large HMO and normally needs planning permission.
- A conversion can be a material change of use under the building regulations, so confirm with building control before work starts.
- Smoke alarms on every storey with living accommodation and CO alarms by fixed combustion appliances (other than gas cookers) are required by law.
- National rules ask for an adequate number of bathrooms, WCs and basins and suitably located kitchens; numeric ratios are set by each council.
How much do extensions for extra rooms cost in Croydon?
| Item | UK typical | Local guide | Per |
|---|---|---|---|
| Single-storey extension, about 15 m² | £35,000 – £60,000 | £44,800 – £76,800 | project |
| Single-storey extension per m² | £1,800 – £4,000 | £2,300 – £5,100 | m² |
These are typical ranges including VAT, adjusted for London, where costs run above the UK average. The fixed price for a house in Croydon follows a site visit.
How long does it take?
Most jobs of this kind take 8–14 weeks. If a council deadline applies in Croydon, tell us at the first call so the programme is built around it.
When do Croydon landlords need it?
Typical reasons for this work in Croydon:
- A kitchen too small for the number of sharers
- Adding a ground-floor room
Questions about extensions for extra rooms in Croydon
Can I extend an HMO under permitted development?
Some extensions to houses are permitted development, but rules differ for HMOs and by nation and council. We check the address before design.
How far do you travel from Croydon?
We cover the whole of Greater London and work UK-wide. For Croydon the nearest towns on our list are South Croydon (1 miles), Wallington (3 miles), Carshalton (3 miles).
Where do I check the HMO rules for an address in Croydon?
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 extensions for extra rooms cost in Croydon?
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.
Extensions for extra rooms near Croydon
- South Croydon · 1 mi
- Wallington · 3 mi
- Carshalton · 3 mi
- Mitcham · 3 mi
- Purley · 3 mi
- Streatham · 3 mi
- All of Greater London