- Nation
- England
- Pricing region
- South East
- Postcode areas
- HP, MK, SL, RG
- Main towns
- Milton Keynes, High Wycombe, Aylesbury, Bletchley, Amersham
What do extensions for extra rooms in Buckinghamshire involve?
- Kitchen or bedroom fit-out
- Party wall coordination where needed
- Foundations, structure and roof
- Ensuite drainage and extraction
- Heating, insulation and glazing
- Building control completion
Which rules apply in Buckinghamshire?
- 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.
- 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.
- Council standards often step up at 5 and 6 sharers, for example a separate WC at 5 and a second bathroom from 6.
- A conversion can be a material change of use under the building regulations, so confirm with building control before work starts.
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 Buckinghamshire?
| Item | UK typical | Local guide | Per |
|---|---|---|---|
| Single-storey extension, about 15 m² | £35,000 – £60,000 | £39,200 – £67,200 | project |
| Single-storey extension per m² | £1,800 – £4,000 | £2,000 – £4,500 | m² |
Typical time on site: 8–14 weeks. For a figure for your house, try the guide-price tool.
Extensions for extra rooms by town in Buckinghamshire
Questions about extensions for extra rooms in Buckinghamshire
Will the extension affect neighbours?
Possibly, if it is on or near a boundary. Party wall procedures may apply in England and Wales.
Can I extend an HMO under permitted development?
Some extensions to houses are permitted development, but rules differ for HMOs and by nation and council. We check the address before design.
Do you carry out extensions for extra rooms across Buckinghamshire?
Yes, across the whole of Buckinghamshire, including Milton Keynes, High Wycombe, Aylesbury.
Who licenses HMOs in Buckinghamshire?
HMOs in Buckinghamshire are licensed by the local council for the address. Where an area has several councils, each runs its own licensing and planning policies.
Other HMO services in Buckinghamshire
- Loft conversions for extra rooms in Buckinghamshire
- Communal kitchen refits in Buckinghamshire
- Layout changes and room reconfiguration in Buckinghamshire
- Large HMO conversions (7+ sharers) in Buckinghamshire
- Ensuite installation in Buckinghamshire
- House to HMO conversion in Buckinghamshire
- Commercial and above-shop to HMO in Buckinghamshire
- EPC and energy upgrades in Buckinghamshire