An HMO extension adds space to a shared house, usually a ground-floor bedroom with ensuite or a bigger communal kitchen. Landlords in Crowborough (TN3 and TN6) 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
- East Sussex, England
- Postcodes
- TN3 and TN6
- Location
- 21 miles north-east of Brighton
- Pricing region
- South East
What do extensions for extra rooms in Crowborough involve?
- Foundations, structure and roof
- Ensuite drainage and extraction
- Planning route check and drawings
- Fire separation and detection extended to the new space
- Building control completion
Which rules apply in Crowborough?
Extensions for extra rooms in Crowborough 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.
- 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 Crowborough?
| 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 Crowborough can move the figure either way, which is why we quote after seeing the house.
How long does it take?
Allow 8–14 weeks on site for a typical job. Drawings, approvals and long-lead items such as kitchens or fire door sets are booked before we start.
When do Crowborough landlords need it?
Typical reasons for this work in Crowborough:
- Moving to more sharers with consent
- Adding a ground-floor room
Questions about extensions for extra rooms in Crowborough
Do you handle building control?
Yes, from application to completion certificate.
How far do you travel from Crowborough?
We cover the whole of East Sussex and work UK-wide. For Crowborough the nearest towns on our list are Royal Tunbridge Wells (7 miles), East Grinstead (9 miles), Tonbridge (10 miles).
Where do I check the HMO rules for an address in Crowborough?
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 Crowborough?
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 Crowborough
- Royal Tunbridge Wells · 7 mi
- East Grinstead · 9 mi
- Tonbridge · 10 mi
- Haywards Heath · 12 mi
- Hailsham · 14 mi
- Sevenoaks · 15 mi
- All of East Sussex
Other HMO services in Crowborough
- Loft conversions for extra rooms in Crowborough
- Communal kitchen refits in Crowborough
- Layout changes and room reconfiguration in Crowborough
- Large HMO conversions (7+ sharers) in Crowborough
- Ensuite installation in Crowborough
- House to HMO conversion in Crowborough
- Sound insulation in Crowborough
- Shared bathroom and shower room refits in Crowborough