An HMO extension adds space to a shared house, usually a ground-floor bedroom with ensuite or a bigger communal kitchen. In Highbury, a town of about 27,000 people in Greater London, the work is planned around the HMO rules for England and the council’s written HMO standards.
- Area
- Greater London, England
- Postcodes
- N5
- Location
- 3 miles north of London
- Pricing region
- London
What do extensions for extra rooms in Highbury involve?
- Planning route check and drawings
- Fire separation and detection extended to the new space
- Kitchen or bedroom fit-out
- Ensuite drainage and extraction
- Party wall coordination where needed
Which rules apply in Highbury?
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 Highbury before we price.
- 7 or more sharers is a sui generis large HMO and normally needs planning permission.
- Building regulations cover structural changes, new partitions, ensuite drainage, fire-resisting construction and notifiable electrical work.
- Smoke alarms on every storey with living accommodation and CO alarms by fixed combustion appliances (other than gas cookers) are required by law.
- Council standards often step up at 5 and 6 sharers, for example a separate WC at 5 and a second bathroom from 6.
How much do extensions for extra rooms cost in Highbury?
| Item | UK typical | Local guide | Per |
|---|---|---|---|
| Single-storey extension, about 15 m² | £35,000 – £60,000 | £44,800 – £76,800 | project |
| Single-storey extension per m² | £1,800 – £4,000 | £2,300 – £5,100 | m² |
Prices in Highbury 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?
Typical time on site: 8–14 weeks. We agree the programme with you before starting and send photo updates as the work progresses.
When do Highbury landlords need it?
Landlords in Highbury most often ask us for this when:
- Adding a ground-floor room
- Moving to more sharers with consent
Questions about extensions for extra rooms in Highbury
Will the extension affect neighbours?
Possibly, if it is on or near a boundary. Party wall procedures may apply in England and Wales.
Do you cover all of Highbury?
Yes. We work across Highbury and the N5 postcode areas, plus the rest of Greater London. Nearby places we also cover include Islington, Holloway, Stamford Hill.
Where do I check the HMO rules for an address in Highbury?
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 extensions for extra rooms cost in Highbury?
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.
Extensions for extra rooms near Highbury
- Islington · 1 mi
- Holloway · 1 mi
- Stamford Hill · 2 mi
- Archway · 2 mi
- Camden Town · 2 mi
- Chalk Farm · 2 mi
- All of Greater London
Other HMO services in Highbury
- Loft conversions for extra rooms in Highbury
- Communal kitchen refits in Highbury
- Layout changes and room reconfiguration in Highbury
- Large HMO conversions (7+ sharers) in Highbury
- Ensuite installation in Highbury
- House to HMO conversion in Highbury
- Rewires and EICR remedials in Highbury
- HMO fire safety upgrades in Highbury