An HMO extension adds space to a shared house, usually a ground-floor bedroom with ensuite or a bigger communal kitchen. In Seaham, a town of about 22,000 people in County Durham, the work is planned around the HMO rules for England and the council’s written HMO standards.
- Area
- County Durham, England
- Postcodes
- SR7
- Location
- 14 miles south-east of Newcastle upon Tyne
- Council
- Durham County Council
- Pricing region
- North East
What do extensions for extra rooms in Seaham involve?
- Heating, insulation and glazing
- Kitchen or bedroom fit-out
- Building control completion
- Ensuite drainage and extraction
- Fire separation and detection extended to the new space
Which rules apply in Seaham?
Here is what usually applies to a Seaham job of this kind. It is general information rather than legal advice, and the council’s written HMO standards have the final detail.
- 3–6 unrelated sharers is use class C4; changing from a family house is usually permitted development unless an Article 4 direction applies.
- A conversion can be a material change of use under the building regulations, so confirm with building control before work starts.
- 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.
Durham County Council: local HMO schemes
| Article 4 (HMO) | In force in part of the council area Directions cover Durham City and other named areas (2016-2022); extension to rest of county proposed. |
|---|---|
| Additional licensing | No scheme found |
| Selective licensing | In force in part of the council area Selective licensing in 103 designated areas 1 Apr 2022-31 Mar 2027; consultation on a replacement (87 postcodes, c.38% of PRS) closed 12 Aug 2026. |
Schemes change. Check the council’s current pages for the exact address in Seaham before you buy or start work. Source: Durham County Council HMO licensing page, checked 2026-10-31.
How much do extensions for extra rooms cost in Seaham?
| 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 |
Prices in Seaham are shown with our regional adjustment for North East (below the UK average). Your quote is itemised and fixed in writing once the scope and specification are agreed.
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 Seaham landlords need it?
Landlords in Seaham most often ask us for this when:
- Moving to more sharers with consent
- Adding a ground-floor room
Questions about extensions for extra rooms in Seaham
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.
Which postcodes in Seaham do you work in?
All of them, including SR7, and the surrounding parts of County Durham.
Which council covers HMOs in Seaham?
Seaham is covered by Durham County Council. We read the council’s written HMO standards before pricing, and you should check the licence position for the exact address.
How much do extensions for extra rooms cost in Seaham?
Our guide ranges for North East 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 Seaham
- Houghton-Le-Spring · 5 mi
- Sunderland · 5 mi
- Peterlee · 5 mi
- Washington · 8 mi
- Chester-le-Street · 9 mi
- Durham · 10 mi
- All of County Durham
Other HMO services in Seaham
- Loft conversions for extra rooms in Seaham
- Communal kitchen refits in Seaham
- Layout changes and room reconfiguration in Seaham
- Large HMO conversions (7+ sharers) in Seaham
- Ensuite installation in Seaham
- House to HMO conversion in Seaham
- Sound insulation in Seaham
- Escape routes, emergency lighting and fire stopping in Seaham