An HMO extension adds space to a shared house, usually a ground-floor bedroom with ensuite or a bigger communal kitchen. Landlords in Letchworth Garden City (SG6 and SG7) 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
- Hertfordshire, England
- Postcodes
- SG6 and SG7
- Location
- 21 miles south-west of Cambridge
- Pricing region
- East of England
What do extensions for extra rooms in Letchworth Garden City involve?
- Heating, insulation and glazing
- Party wall coordination where needed
- Fire separation and detection extended to the new space
- Building control completion
- Kitchen or bedroom fit-out
Which rules apply in Letchworth Garden City?
Extensions for extra rooms in Letchworth Garden City 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.
- 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 Letchworth Garden City?
| Item | UK typical | Local guide | Per |
|---|---|---|---|
| Single-storey extension, about 15 m² | £35,000 – £60,000 | £37,100 – £63,600 | project |
| Single-storey extension per m² | £1,800 – £4,000 | £1,900 – £4,250 | m² |
Use these as a starting point for budgeting. Access, condition and the council’s requirements in Letchworth Garden City 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 Letchworth Garden City landlords need it?
We usually get the call when:
- Moving to more sharers with consent
- Adding a ground-floor room
Questions about extensions for extra rooms in Letchworth Garden City
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 Letchworth Garden City?
Yes. We work across Letchworth Garden City and the SG6 and SG7 postcode areas, plus the rest of Hertfordshire. Nearby places we also cover include Hitchin, Stevenage, Luton.
Does a shared house in Letchworth Garden City need an HMO licence?
In England, a mandatory licence is needed for 5 or more people from 2 or more households. Smaller HMOs can need a licence where the council runs additional licensing, which is common in towns with many shared houses. Check the council’s website for the address.
How much do extensions for extra rooms cost in Letchworth Garden City?
Our guide ranges for East of England 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 Letchworth Garden City
- Hitchin · 3 mi
- Stevenage · 5 mi
- Luton · 11 mi
- Ampthill · 12 mi
- Welwyn Garden City · 12 mi
- Harpenden · 13 mi
- All of Hertfordshire
Other HMO services in Letchworth Garden City
- Loft conversions for extra rooms in Letchworth Garden City
- Communal kitchen refits in Letchworth Garden City
- Layout changes and room reconfiguration in Letchworth Garden City
- Large HMO conversions (7+ sharers) in Letchworth Garden City
- Ensuite installation in Letchworth Garden City
- House to HMO conversion in Letchworth Garden City
- Full HMO refurbishment in Letchworth Garden City
- Bedroom upgrades and room refits in Letchworth Garden City