An HMO loft conversion adds one or two letting rooms, often with an ensuite, in the roof space. Brighton is 47 miles south of London. We price loft conversions for extra rooms there against England’s HMO rules and the council’s written HMO standards, so work is planned to the standard an inspection looks for. With students as well as working sharers renting in Brighton, we plan bigger jobs for the gap between academic-year tenancies where we can.
- Area
- East Sussex, England
- Postcodes
- BN1, BN2 and BN3
- Location
- 47 miles south of London
- Council
- Brighton & Hove City Council
- Pricing region
- South East
What do loft conversions for extra rooms in Brighton involve?
- New stair within the protected route
- Building control sign-off
- Planning or permitted development check
- Fire doors and extended alarm system
- Structural design and steelwork
Which rules apply in Brighton?
Here is what usually applies to a Brighton job of this kind. It is general information rather than legal advice, and the council’s written HMO standards have the final detail.
- 3–6 unrelated sharers is use class C4; changing from a family house is usually permitted development unless an Article 4 direction applies.
- Building regulations cover structural changes, new partitions, ensuite drainage, fire-resisting construction and notifiable electrical work.
- 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.
Brighton & Hove City Council: local HMO schemes
| Article 4 (HMO) | In force across the council area City-wide C3-C4 Article 4 Direction confirmed Jan 2020 and in force June 2020 (replaced the 2013 five-ward direction). |
|---|---|
| Additional licensing | In force across the council area Additional licensing across all 23 wards 1 Jul 2024-30 Jun 2029. |
| Selective licensing | In force in part of the council area Kemptown, Moulsecoomb & Bevendean, Queen's Park, Whitehawk & Marina 2 Sep 2024-1 Sep 2029. Central Hove & Regency designation (made 6 Jul 2026, due 20 Oct 2026) is paused pending a legal challenge. |
Schemes change. Check the council’s current pages for the exact address in Brighton before you buy or start work. Source: Brighton & Hove City Council HMO licensing page, checked 2026-10-31.
How much do loft conversions for extra rooms cost in Brighton?
| Item | UK typical | Local guide | Per |
|---|---|---|---|
| Dormer loft conversion, about 30 m² | £40,000 – £60,000 | £44,800 – £67,200 | project |
| Rooflight loft conversion, about 30 m² | £22,500 – £30,000 | £25,200 – £33,600 | project |
Prices in Brighton are shown with our regional adjustment for South East (above the UK average). Your quote is itemised and fixed in writing once the scope and specification are agreed.
How long does it take?
Typical time on site: 6–10 weeks. We agree the programme with you before starting and send photo updates as the work progresses.
If the house is let to students, we work backwards from the next tenancy start date in Brighton.
When do Brighton landlords need it?
Landlords in Brighton 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 Brighton
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.
Do you cover all of Brighton?
Yes. We work across Brighton and the BN1, BN2 and BN3 postcode areas, plus the rest of East Sussex. Nearby places we also cover include Hove, Portslade, Rottingdean.
Which council covers HMOs in Brighton?
Brighton is covered by Brighton & Hove City Council. 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 Brighton?
Our guide ranges for South East 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 Brighton
- Hove · 1 mi
- Portslade · 3 mi
- Rottingdean · 4 mi
- Burgess Hill · 9 mi
- Worthing · 10 mi
- Seaford · 11 mi
- All of East Sussex
Other HMO services in Brighton
- Extensions for extra rooms in Brighton
- Large HMO conversions (7+ sharers) in Brighton
- Escape routes, emergency lighting and fire stopping in Brighton
- Ensuite installation in Brighton
- Layout changes and room reconfiguration in Brighton
- Fire alarm and detection systems in Brighton
- Fire doors in Brighton
- Communal kitchen refits in Brighton