In short: An HMO extension adds space to a shared house, usually a ground-floor bedroom with ensuite or a bigger communal kitchen. We carry this out across Kent, priced against the HMO rules for England and the council’s own standards.
- Nation
- England
- Pricing region
- South East
- Postcode areas
- TN, CT, ME, DA
- Main towns
- Saint Peters, Maidstone, Gillingham, Chatham, Royal Tunbridge Wells
What do extensions for extra rooms in Kent involve?
- Fire separation and detection extended to the new space
- Ensuite drainage and extraction
- Planning route check and drawings
- Heating, insulation and glazing
- Building control completion
- Kitchen or bedroom fit-out
Which rules apply in Kent?
- 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.
- A conversion can be a material change of use under the building regulations, so confirm with building control before work starts.
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 Kent?
| 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 |
Typical time on site: 8–14 weeks. For a figure for your house, try the guide-price tool.
Extensions for extra rooms by town in Kent
- Saint Peters
- Maidstone
- Gillingham
- Chatham
- Royal Tunbridge Wells
- Folkestone
- Margate
- Ashford (Kent)
- Canterbury
- Sittingbourne
- Gravesend
- Dartford
- Ramsgate
- Dover
- Tonbridge
- Strood
- Whitstable
- Deal
- Sevenoaks
- Rochester
- Herne Bay
- Broadstairs
- Faversham
- Swanley
Questions about extensions for extra rooms in Kent
Do you handle building control?
Yes, from application to completion certificate.
Will the extension affect neighbours?
Possibly, if it is on or near a boundary. Party wall procedures may apply in England and Wales.
Do you carry out extensions for extra rooms across Kent?
Yes, across the whole of Kent, including Saint Peters, Maidstone, Gillingham.
Who licenses HMOs in Kent?
HMOs in Kent are licensed by the local council for the address. Where an area has several councils, each runs its own licensing and planning policies.
Other HMO services in Kent
- Loft conversions for extra rooms in Kent
- Communal kitchen refits in Kent
- Layout changes and room reconfiguration in Kent
- Large HMO conversions (7+ sharers) in Kent
- Ensuite installation in Kent
- House to HMO conversion in Kent
- Bedroom upgrades and room refits in Kent
- Shared bathroom and shower room refits in Kent