An HMO extension adds space to a shared house, usually a ground-floor bedroom with ensuite or a bigger communal kitchen. Wallington is 10 miles south 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
- SM5 and SM6
- Location
- 10 miles south of London
- Pricing region
- London
What do extensions for extra rooms in Wallington involve?
- Building control completion
- Party wall coordination where needed
- Foundations, structure and roof
- Fire separation and detection extended to the new space
- Ensuite drainage and extraction
Which rules apply in Wallington?
Extensions for extra rooms in Wallington 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.
- National rules ask for an adequate number of bathrooms, WCs and basins and suitably located kitchens; numeric ratios are set by each council.
How much do extensions for extra rooms cost in Wallington?
| 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 Wallington can move the figure either way, which is why we quote after seeing the house.
How long does it take?
Allow 8–14 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 Wallington landlords need it?
Typical reasons for this work in Wallington:
- Moving to more sharers with consent
- Adding a ground-floor room
Questions about extensions for extra rooms in Wallington
Do you handle building control?
Yes, from application to completion certificate.
How far do you travel from Wallington?
We cover the whole of Greater London and work UK-wide. For Wallington the nearest towns on our list are Carshalton (1 miles), Sutton (2 miles), South Croydon (3 miles).
Where do I check the HMO rules for an address in Wallington?
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 Wallington?
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 Wallington
- Carshalton · 1 mi
- Sutton · 2 mi
- South Croydon · 3 mi
- Purley · 3 mi
- Croydon · 3 mi
- Mitcham · 3 mi
- All of Greater London
Other HMO services in Wallington
- Loft conversions for extra rooms in Wallington
- Communal kitchen refits in Wallington
- Layout changes and room reconfiguration in Wallington
- Large HMO conversions (7+ sharers) in Wallington
- Ensuite installation in Wallington
- House to HMO conversion in Wallington
- Bedroom upgrades and room refits in Wallington
- Professional and co-living HMO refurbs in Wallington