An HMO extension adds space to a shared house, usually a ground-floor bedroom with ensuite or a bigger communal kitchen. Coulsdon is 13 miles south of London. We price extensions for extra rooms there against England’s HMO rules and the council’s written HMO standards, so work is planned to the standard an inspection looks for.
- Area
- Greater London, England
- Postcodes
- CR5 and CR8
- Location
- 13 miles south of London
- Pricing region
- London
What do extensions for extra rooms in Coulsdon involve?
- Heating, insulation and glazing
- Fire separation and detection extended to the new space
- Planning route check and drawings
- Party wall coordination where needed
- Kitchen or bedroom fit-out
Which rules apply in Coulsdon?
Extensions for extra rooms in Coulsdon must satisfy national law for England, the council’s written HMO standards and, where walls, drainage or fire separation change, the building rules. In short:
- 7 or more sharers is a sui generis large HMO and normally needs planning permission.
- Building regulations cover structural changes, new partitions, ensuite drainage, fire-resisting construction and notifiable electrical work.
- Fire precautions follow a risk assessment; the LACORS Housing – Fire Safety guide (2008) is guidance, not law, but many councils base their standards on it.
- Council standards often step up at 5 and 6 sharers, for example a separate WC at 5 and a second bathroom from 6.
How much do extensions for extra rooms cost in Coulsdon?
| 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 |
Use these as a starting point for budgeting. Access, condition and the council’s requirements in Coulsdon can move the figure either way, which is why we quote after seeing the house.
How long does it take?
Most jobs of this kind take 8–14 weeks. If a council deadline applies in Coulsdon, tell us at the first call so the programme is built around it.
When do Coulsdon landlords need it?
Landlords in Coulsdon most often ask us for this when:
- A kitchen too small for the number of sharers
- Moving to more sharers with consent
Questions about extensions for extra rooms in Coulsdon
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.
Which postcodes in Coulsdon do you work in?
All of them, including CR5 and CR8, and the surrounding parts of Greater London.
Does a shared house in Coulsdon need an HMO licence?
In England, a mandatory licence is needed for 5 or more people from 2 or more households. Smaller HMOs can need a licence where the council runs additional licensing, which is common in towns with many shared houses. Check the council’s website for the address.
How much do extensions for extra rooms cost in Coulsdon?
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 Coulsdon
- Purley · 2 mi
- Banstead · 3 mi
- Wallington · 3 mi
- Sutton · 3 mi
- Carshalton · 4 mi
- South Croydon · 4 mi
- All of Greater London
Other HMO services in Coulsdon
- Loft conversions for extra rooms in Coulsdon
- Communal kitchen refits in Coulsdon
- Layout changes and room reconfiguration in Coulsdon
- Large HMO conversions (7+ sharers) in Coulsdon
- Ensuite installation in Coulsdon
- House to HMO conversion in Coulsdon
- Shared bathroom and shower room refits in Coulsdon
- Fire alarm and detection systems in Coulsdon