An HMO extension adds space to a shared house, usually a ground-floor bedroom with ensuite or a bigger communal kitchen. For a house in Winchester we start with a measured survey, check the council’s written HMO standards for the number of sharers, and then price each item separately. Winchester has a university population, so many shared houses are let to students on yearly tenancies, and summer is the main window for works.
- Area
- Hampshire, England
- Postcodes
- SO21, SO23 and SO25
- Location
- 12 miles north of Southampton
- Pricing region
- South East
What do extensions for extra rooms in Winchester involve?
- Kitchen or bedroom fit-out
- Fire separation and detection extended to the new space
- Ensuite drainage and extraction
- Heating, insulation and glazing
- Foundations, structure and roof
Which rules apply in Winchester?
Extensions for extra rooms in Winchester 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:
- 7 or more sharers is a sui generis large HMO and normally needs planning permission.
- A conversion can be a material change of use under the building regulations, so confirm with building control before work starts.
- 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 Winchester?
| 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 |
Prices in Winchester are shown with our regional adjustment for South East (above the UK average). Your quote is itemised and fixed in writing once the scope and specification are agreed.
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.
For student houses in Winchester, booking by spring is the safest way to make the summer gap.
When do Winchester landlords need it?
Landlords in Winchester most often ask us for this when:
- Adding a ground-floor room
- A kitchen too small for the number of sharers
Questions about extensions for extra rooms in Winchester
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.
Which postcodes in Winchester do you work in?
All of them, including SO21, SO23 and SO25, and the surrounding parts of Hampshire.
Does a shared house in Winchester 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 Winchester?
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 Winchester
- Eastleigh · 7 mi
- Southampton · 12 mi
- Totton · 13 mi
- Andover · 13 mi
- Hythe · 15 mi
- Fareham · 16 mi
- All of Hampshire
Other HMO services in Winchester
- Loft conversions for extra rooms in Winchester
- Communal kitchen refits in Winchester
- Layout changes and room reconfiguration in Winchester
- Large HMO conversions (7+ sharers) in Winchester
- Ensuite installation in Winchester
- House to HMO conversion in Winchester
- Sound insulation in Winchester
- Student HMO refurbishment in Winchester