An HMO extension adds space to a shared house, usually a ground-floor bedroom with ensuite or a bigger communal kitchen. Beckenham is 8 miles south-east of London. We price extensions 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.
- Area
- Greater London, England
- Postcodes
- BR3, SE20 and SE25
- Location
- 8 miles south-east of London
- Pricing region
- London
What do extensions for extra rooms in Beckenham involve?
- Foundations, structure and roof
- Fire separation and detection extended to the new space
- Kitchen or bedroom fit-out
- Planning route check and drawings
- Party wall coordination where needed
Which rules apply in Beckenham?
Extensions for extra rooms in Beckenham 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.
- 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 Beckenham?
| 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 |
Use these as a starting point for budgeting. Access, condition and the council’s requirements in Beckenham can move the figure either way, which is why we quote after seeing the house.
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 Beckenham landlords need it?
Landlords in Beckenham most often ask us for this when:
- A kitchen too small for the number of sharers
- Moving to more sharers with consent
Questions about extensions for extra rooms in Beckenham
Will the extension affect neighbours?
Possibly, if it is on or near a boundary. Party wall procedures may apply in England and Wales.
Which postcodes in Beckenham do you work in?
All of them, including BR3, SE20 and SE25, and the surrounding parts of Greater London.
Where do I check the HMO rules for an address in Beckenham?
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 Beckenham?
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 Beckenham
- Catford · 3 mi
- Croydon · 4 mi
- Blackheath · 4 mi
- South Croydon · 4 mi
- Eltham · 4 mi
- Streatham · 5 mi
- All of Greater London
Other HMO services in Beckenham
- Loft conversions for extra rooms in Beckenham
- Communal kitchen refits in Beckenham
- Layout changes and room reconfiguration in Beckenham
- Large HMO conversions (7+ sharers) in Beckenham
- Ensuite installation in Beckenham
- House to HMO conversion in Beckenham
- Bedroom upgrades and room refits in Beckenham
- Rewires and EICR remedials in Beckenham