An HMO loft conversion adds one or two letting rooms, often with an ensuite, in the roof space. Landlords in Hounslow (TW3, TW4 and TW6) 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
- TW3, TW4 and TW6
- Location
- 10 miles west of London
- Pricing region
- London
What do loft conversions for extra rooms in Hounslow involve?
- New stair within the protected route
- Dormer or roof windows
- Ensuite where space allows
- Structural design and steelwork
- Planning or permitted development check
Which rules apply in Hounslow?
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 Hounslow 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.
- 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.
- 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 Hounslow?
| 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 |
These are typical ranges including VAT, adjusted for London, where costs run above the UK average. The fixed price for a house in Hounslow follows a site visit.
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 Hounslow landlords need it?
Landlords in Hounslow most often ask us for this when:
- Adding rooms to make an HMO work financially
- A house with usable roof space
Questions about loft conversions for extra rooms in Hounslow
Does adding a loft room change the HMO planning position?
It can. Going from six to seven sharers moves a house into a large HMO in England, which normally needs planning permission. We check before design.
How far do you travel from Hounslow?
We cover the whole of Greater London and work UK-wide. For Hounslow the nearest towns on our list are Isleworth (1 miles), Heston (1 miles), Richmond (2 miles).
Does a shared house in Hounslow 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 loft conversions for extra rooms cost in Hounslow?
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 Hounslow
- Isleworth · 1 mi
- Heston · 1 mi
- Richmond · 2 mi
- Hanworth · 3 mi
- Feltham · 3 mi
- Southall · 3 mi
- All of Greater London
Other HMO services in Hounslow
- Extensions for extra rooms in Hounslow
- Large HMO conversions (7+ sharers) in Hounslow
- Escape routes, emergency lighting and fire stopping in Hounslow
- Ensuite installation in Hounslow
- Layout changes and room reconfiguration in Hounslow
- Fire alarm and detection systems in Hounslow
- Fire doors in Hounslow
- Sound insulation in Hounslow