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 Merseyside, priced against the HMO rules for England and the council’s own standards.
- Nation
- England
- Pricing region
- North West
- Postcode areas
- L, CH, WA, PR
- Main towns
- Liverpool, Birkenhead, St Helens, Southport, Wallasey
What do extensions for extra rooms in Merseyside involve?
- Ensuite drainage and extraction
- Planning route check and drawings
- Heating, insulation and glazing
- Kitchen or bedroom fit-out
- Party wall coordination where needed
- Building control completion
Which rules apply in Merseyside?
- 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.
- 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 Merseyside?
| Item | UK typical | Local guide | Per |
|---|---|---|---|
| Single-storey extension, about 15 m² | £35,000 – £60,000 | £33,600 – £57,600 | project |
| Single-storey extension per m² | £1,800 – £4,000 | £1,750 – £3,850 | 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 Merseyside
- Liverpool
- Birkenhead
- St Helens
- Southport
- Wallasey
- Bootle
- Bebington
- Huyton
- Kirkby
- Prescot
- Heswall
- Maghull
- Ashton in Makerfield
- Newton-le-Willows
- Formby
- Litherland
- Speke
- Garston
- Halewood
Questions about extensions for extra rooms in Merseyside
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 handle building control?
Yes, from application to completion certificate.
Do you carry out extensions for extra rooms across Merseyside?
Yes, across the whole of Merseyside, including Liverpool, Birkenhead, St Helens.
Who licenses HMOs in Merseyside?
HMOs in Merseyside 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 Merseyside
- Loft conversions for extra rooms in Merseyside
- Communal kitchen refits in Merseyside
- Layout changes and room reconfiguration in Merseyside
- Large HMO conversions (7+ sharers) in Merseyside
- Ensuite installation in Merseyside
- House to HMO conversion in Merseyside
- Professional and co-living HMO refurbs in Merseyside
- Small HMO conversions (3–6 sharers) in Merseyside