In short: An HMO extension adds space to a shared house, usually a ground-floor bedroom with ensuite or a bigger communal kitchen. In Surrey we survey first, price each item separately and hand over the certificates and photos a council asks for.
- Nation
- England
- Pricing region
- South East
- Postcode areas
- GU, RH, KT, TW
- Main towns
- Woking, Guildford, Esher, Redhill, Staines
What do extensions for extra rooms in Surrey involve?
- Party wall coordination where needed
- Building control completion
- Kitchen or bedroom fit-out
- Planning route check and drawings
- Fire separation and detection extended to the new space
- Ensuite drainage and extraction
Which rules apply in Surrey?
- 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.
- The Fire Safety Order 2005 applies to the common parts of HMOs, enforced by the fire and rescue authority.
- National rules ask for an adequate number of bathrooms, WCs and basins and suitably located kitchens; numeric ratios are set by each council.
- 7 or more sharers is a sui generis large HMO and normally needs planning permission.
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 Surrey?
| 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 Surrey
- Woking
- Guildford
- Esher
- Redhill
- Staines
- Banstead
- Leatherhead
- Aldershot
- Ewell
- Farnham
- Epsom
- Camberley
- Egham
- Sunbury-on-Thames
- Ashford (Surrey)
- Walton-on-Thames
- Godalming
- Reigate
- Horley
- Caterham
Questions about extensions for extra rooms in Surrey
Do you handle building control?
Yes, from application to completion certificate.
Is a kitchen extension worth it?
Often, when the existing kitchen limits how many people the council will allow. A bigger kitchen can unlock an extra room.
Do you carry out extensions for extra rooms across Surrey?
Yes, across the whole of Surrey, including Woking, Guildford, Esher.
Who licenses HMOs in Surrey?
HMOs in Surrey 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 Surrey
- Loft conversions for extra rooms in Surrey
- Communal kitchen refits in Surrey
- Layout changes and room reconfiguration in Surrey
- Large HMO conversions (7+ sharers) in Surrey
- Ensuite installation in Surrey
- House to HMO conversion in Surrey
- Professional and co-living HMO refurbs in Surrey
- Escape routes, emergency lighting and fire stopping in Surrey