An HMO loft conversion adds one or two letting rooms, often with an ensuite, in the roof space. Landlords in City of Westminster (SW1 and W2) 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
- Greater London, England
- Postcodes
- SW1 and W2
- Location
- 1 miles south-west of London
- Pricing region
- London
What do loft conversions for extra rooms in City of Westminster involve?
- Feasibility and head-height check
- Building control sign-off
- Structural design and steelwork
- Ensuite where space allows
- Fire doors and extended alarm system
Which rules apply in City of Westminster?
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 City of Westminster before we price.
- 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.
- Floor area under a ceiling lower than 1.5 m does not count towards the room size, and many councils set larger sizes.
How much do loft conversions for extra rooms cost in City of Westminster?
| Item | UK typical | Local guide | Per |
|---|---|---|---|
| Dormer loft conversion, about 30 m² | £40,000 – £60,000 | £51,200 – £76,800 | project |
| Rooflight loft conversion, about 30 m² | £22,500 – £30,000 | £28,800 – £38,400 | project |
Use these as a starting point for budgeting. Access, condition and the council’s requirements in City of Westminster can move the figure either way, which is why we quote after seeing the house.
How long does it take?
Allow 6–10 weeks on site for a typical job. Drawings, approvals and long-lead items such as kitchens or fire door sets are booked before we start.
When do City of Westminster landlords need it?
Landlords in City of Westminster most often ask us for this when:
- A house with usable roof space
- Adding rooms to make an HMO work financially
Questions about loft conversions for extra rooms in City of Westminster
Does a loft room need a fire escape window?
In an HMO the main protection is usually a protected stair and fire doors. The building regulations and fire strategy decide the detail.
Do you cover all of City of Westminster?
Yes. We work across City of Westminster and the SW1 and W2 postcode areas, plus the rest of Greater London. Nearby places we also cover include Pimlico, London, Chelsea.
Where do I check the HMO rules for an address in City of Westminster?
With the local council for the address. 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 loft conversions for extra rooms cost in City of Westminster?
Our guide ranges for London 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.
Loft conversions for extra rooms near City of Westminster
- Pimlico · 1 mi
- London · 1 mi
- Chelsea · 2 mi
- Battersea · 2 mi
- Brixton · 3 mi
- Fulham · 3 mi
- All of Greater London
Other HMO services in City of Westminster
- Extensions for extra rooms in City of Westminster
- Large HMO conversions (7+ sharers) in City of Westminster
- Escape routes, emergency lighting and fire stopping in City of Westminster
- Ensuite installation in City of Westminster
- Layout changes and room reconfiguration in City of Westminster
- Fire alarm and detection systems in City of Westminster
- Professional and co-living HMO refurbs in City of Westminster
- House to HMO conversion in City of Westminster