- Nation
- England
- Pricing region
- North East
- Postcode areas
- DL, DH, TS, SR
- Main towns
- Darlington, Hartlepool, Stockton-on-Tees, Durham, Chester-le-Street
What do extensions for extra rooms in County Durham involve?
- Kitchen or bedroom fit-out
- Planning route check and drawings
- Fire separation and detection extended to the new space
- Party wall coordination where needed
- Foundations, structure and roof
- Ensuite drainage and extraction
Which rules apply in County Durham?
- 3–6 unrelated sharers is use class C4; changing from a family house is usually permitted development unless an Article 4 direction applies.
- 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.
- National rules ask for an adequate number of bathrooms, WCs and basins and suitably located kitchens; numeric ratios are set by each council.
- 7 or more sharers is a sui generis large HMO and normally needs planning permission.
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 County Durham?
| Item | UK typical | Local guide | Per |
|---|---|---|---|
| Single-storey extension, about 15 m² | £35,000 – £60,000 | £32,200 – £55,200 | project |
| Single-storey extension per m² | £1,800 – £4,000 | £1,650 – £3,700 | 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 County Durham
- Darlington
- Hartlepool
- Stockton-on-Tees
- Durham
- Chester-le-Street
- Billingham
- Stanley
- Consett
- Newton Aycliffe
- Bishop Auckland
- Seaham
- Peterlee
Questions about extensions for extra rooms in County Durham
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.
Is a kitchen extension worth it?
Often, when the existing kitchen limits how many people the council will allow. A bigger kitchen can unlock an extra room.
Do you carry out extensions for extra rooms across County Durham?
Yes, across the whole of County Durham, including Darlington, Hartlepool, Stockton-on-Tees.
Who licenses HMOs in County Durham?
HMOs in County Durham 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 County Durham
- Loft conversions for extra rooms in County Durham
- Communal kitchen refits in County Durham
- Layout changes and room reconfiguration in County Durham
- Large HMO conversions (7+ sharers) in County Durham
- Ensuite installation in County Durham
- House to HMO conversion in County Durham
- Full HMO refurbishment in County Durham
- Damp, mould and HHSRS repairs in County Durham