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 Blackburn we start with a measured survey, check the council’s written HMO standards for the number of sharers, and then price each item separately.
- Area
- Lancashire, England
- Postcodes
- BB1 and BB2
- Location
- 9 miles east of Preston
- Pricing region
- North West
What do extensions for extra rooms in Blackburn involve?
- Ensuite drainage and extraction
- Kitchen or bedroom fit-out
- Heating, insulation and glazing
- Planning route check and drawings
- Party wall coordination where needed
Which rules apply in Blackburn?
The rules below are the England-wide position for this kind of work. Councils add their own standards and schemes on top, so we always check the address in Blackburn before we price.
- 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.
- 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 Blackburn?
| 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 |
Use these as a starting point for budgeting. Access, condition and the council’s requirements in Blackburn can move the figure either way, which is why we quote after seeing the house.
How long does it take?
Most jobs of this kind take 8–14 weeks. If a council deadline applies in Blackburn, tell us at the first call so the programme is built around it.
When do Blackburn landlords need it?
Landlords in Blackburn 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 Blackburn
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 cover all of Blackburn?
Yes. We work across Blackburn and the BB1 and BB2 postcode areas, plus the rest of Lancashire. Nearby places we also cover include Darwen, Accrington, Chorley.
Does a shared house in Blackburn 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 Blackburn?
Our guide ranges for North West 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 Blackburn
- Darwen · 4 mi
- Accrington · 5 mi
- Chorley · 9 mi
- Rawtenstall · 9 mi
- Preston · 9 mi
- Leyland · 9 mi
- All of Lancashire
Other HMO services in Blackburn
- Loft conversions for extra rooms in Blackburn
- Communal kitchen refits in Blackburn
- Layout changes and room reconfiguration in Blackburn
- Large HMO conversions (7+ sharers) in Blackburn
- Ensuite installation in Blackburn
- House to HMO conversion in Blackburn
- Rewires and EICR remedials in Blackburn
- Damp, mould and HHSRS repairs in Blackburn