An HMO extension adds space to a shared house, usually a ground-floor bedroom with ensuite or a bigger communal kitchen. Landlords in Sunbury-on-Thames (KT12, TW16 and TW17) 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
- KT12, TW16 and TW17
- Location
- 15 miles south-west of London
- Pricing region
- South East
What do extensions for extra rooms in Sunbury-on-Thames involve?
- Foundations, structure and roof
- Kitchen or bedroom fit-out
- Ensuite drainage and extraction
- Party wall coordination where needed
- Fire separation and detection extended to the new space
Which rules apply in Sunbury-on-Thames?
Here is what usually applies to a Sunbury-on-Thames job of this kind. It is general information rather than legal advice, and the council’s written HMO standards have the final detail.
- 3–6 unrelated sharers is use class C4; changing from a family house is usually permitted development unless an Article 4 direction applies.
- A conversion can be a material change of use under the building regulations, so confirm with building control before work starts.
- 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.
How much do extensions for extra rooms cost in Sunbury-on-Thames?
| 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 |
These are typical ranges including VAT, adjusted for South East, where costs run above the UK average. The fixed price for a house in Sunbury-on-Thames follows a site visit.
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 Sunbury-on-Thames landlords need it?
We usually get the call when:
- Adding a ground-floor room
- A kitchen too small for the number of sharers
Questions about extensions for extra rooms in Sunbury-on-Thames
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.
Do you cover all of Sunbury-on-Thames?
Yes. We work across Sunbury-on-Thames and the KT12, TW16 and TW17 postcode areas, plus the rest of Surrey. Nearby places we also cover include Walton-on-Thames, Hampton, Hanworth.
Does a shared house in Sunbury-on-Thames 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 Sunbury-on-Thames?
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 Sunbury-on-Thames
- Walton-on-Thames · 1 mi
- Hampton · 2 mi
- Hanworth · 3 mi
- Ashford (Surrey) · 3 mi
- Feltham · 3 mi
- Esher · 3 mi
- All of Surrey
Other HMO services in Sunbury-on-Thames
- Loft conversions for extra rooms in Sunbury-on-Thames
- Communal kitchen refits in Sunbury-on-Thames
- Layout changes and room reconfiguration in Sunbury-on-Thames
- Large HMO conversions (7+ sharers) in Sunbury-on-Thames
- Ensuite installation in Sunbury-on-Thames
- House to HMO conversion in Sunbury-on-Thames
- Fire alarm and detection systems in Sunbury-on-Thames
- HMO fire safety upgrades in Sunbury-on-Thames