An HMO loft conversion adds one or two letting rooms, often with an ensuite, in the roof space. Landlords in Willesden (NW10) 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
- NW10
- Location
- 5 miles west of London
- Council
- London Borough of Brent
- Pricing region
- London
What do loft conversions for extra rooms in Willesden involve?
- Structural design and steelwork
- New stair within the protected route
- Feasibility and head-height check
- Fire doors and extended alarm system
- Dormer or roof windows
Which rules apply in Willesden?
Loft conversions for extra rooms in Willesden 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.
- Smoke alarms on every storey with living accommodation and CO alarms by fixed combustion appliances (other than gas cookers) are required by law.
- Licensed HMOs must meet national minimum bedroom sizes: 6.51 m² for one person aged 10 or over, 10.22 m² for two, and 4.64 m² for a child under 10.
London Borough of Brent: local HMO schemes
| Article 4 (HMO) | In force across the council area Borough-wide Article 4 Direction (C3 to C4) since 1 Nov 2022. |
|---|---|
| Additional licensing | In force across the council area Borough-wide additional licensing in force 2 Feb 2026 to 1 Feb 2031. |
| Selective licensing | In force in part of the council area All wards except Wembley Park: Dollis Hill, Harlesden & Kensal Green, Willesden Green 1 Aug 2023-31 Jul 2028; 18 further wards 1 Apr 2024-31 Mar 2029. |
Schemes change. Check the council’s current pages for the exact address in Willesden before you buy or start work. Source: London Borough of Brent HMO licensing page, checked 2026-10-31.
How much do loft conversions for extra rooms cost in Willesden?
| 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 |
Prices in Willesden are shown with our regional adjustment for London (above the UK average). Your quote is itemised and fixed in writing once the scope and specification are agreed.
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 Willesden landlords need it?
Landlords in Willesden most often ask us for this when:
- Moving to a larger HMO with the right consents
- Adding rooms to make an HMO work financially
Questions about loft conversions for extra rooms in Willesden
How much head height do I need?
As a rule of thumb, about 2.2 metres at the highest point of the existing roof space before any work. Less can work with a dormer or lowered ceilings.
Do you cover all of Willesden?
Yes. We work across Willesden and the NW10 postcode areas, plus the rest of Greater London. Nearby places we also cover include Cricklewood, Notting Hill, Shepherds Bush.
Which council covers HMOs in Willesden?
Willesden is covered by London Borough of Brent. We read the council’s written HMO standards before pricing, and you should check the licence position for the exact address.
How much do loft conversions for extra rooms cost in Willesden?
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 Willesden
- Cricklewood · 2 mi
- Notting Hill · 2 mi
- Shepherds Bush · 2 mi
- Kilburn · 2 mi
- Acton · 2 mi
- Chiswick · 3 mi
- All of Greater London
Other HMO services in Willesden
- Extensions for extra rooms in Willesden
- Large HMO conversions (7+ sharers) in Willesden
- Escape routes, emergency lighting and fire stopping in Willesden
- Ensuite installation in Willesden
- Layout changes and room reconfiguration in Willesden
- Fire alarm and detection systems in Willesden
- Small HMO conversions (3–6 sharers) in Willesden
- Void and between-tenancy refurbs in Willesden