An HMO extension adds space to a shared house, usually a ground-floor bedroom with ensuite or a bigger communal kitchen. Landlords in Caterham (CR3) 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
- Surrey, England
- Postcodes
- CR3
- Location
- 16 miles south of London
- Pricing region
- South East
What do extensions for extra rooms in Caterham involve?
- Party wall coordination where needed
- Ensuite drainage and extraction
- Planning route check and drawings
- Kitchen or bedroom fit-out
- Building control completion
Which rules apply in Caterham?
Extensions for extra rooms in Caterham 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:
- 3–6 unrelated sharers is use class C4; changing from a family house is usually permitted development unless an Article 4 direction applies.
- Building regulations cover structural changes, new partitions, ensuite drainage, fire-resisting construction and notifiable electrical work.
- Smoke alarms on every storey with living accommodation and CO alarms by fixed combustion appliances (other than gas cookers) are required by law.
- 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 Caterham?
| Item | UK typical | Local guide | Per |
|---|---|---|---|
| Single-storey extension, about 15 m² | £35,000 – £60,000 | £39,200 – £67,200 | project |
| Single-storey extension per m² | £1,800 – £4,000 | £2,000 – £4,500 | m² |
Use these as a starting point for budgeting. Access, condition and the council’s requirements in Caterham can move the figure either way, which is why we quote after seeing the house.
How long does it take?
Typical time on site: 8–14 weeks. We agree the programme with you before starting and send photo updates as the work progresses.
When do Caterham landlords need it?
Typical reasons for this work in Caterham:
- Moving to more sharers with consent
- Adding a ground-floor room
Questions about extensions for extra rooms in Caterham
Do you handle building control?
Yes, from application to completion certificate.
Which postcodes in Caterham do you work in?
All of them, including CR3, and the surrounding parts of Surrey.
Does a shared house in Caterham 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 Caterham?
Our guide ranges for South East 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 Caterham
- Coulsdon · 4 mi
- Purley · 4 mi
- Redhill · 5 mi
- South Croydon · 6 mi
- Banstead · 6 mi
- Reigate · 6 mi
- All of Surrey
Other HMO services in Caterham
- Loft conversions for extra rooms in Caterham
- Communal kitchen refits in Caterham
- Layout changes and room reconfiguration in Caterham
- Large HMO conversions (7+ sharers) in Caterham
- Ensuite installation in Caterham
- House to HMO conversion in Caterham
- Bedroom upgrades and room refits in Caterham
- Escape routes, emergency lighting and fire stopping in Caterham