An HMO extension adds space to a shared house, usually a ground-floor bedroom with ensuite or a bigger communal kitchen. For a house in Truro we start with a measured survey, check the council’s written HMO standards for the number of sharers, and then price each item separately.
- Area
- Cornwall, England
- Postcodes
- TR1
- Location
- 41 miles west of Plymouth
- Pricing region
- South West
What do extensions for extra rooms in Truro involve?
- Kitchen or bedroom fit-out
- Planning route check and drawings
- Fire separation and detection extended to the new space
- Heating, insulation and glazing
- Party wall coordination where needed
Which rules apply in Truro?
Extensions for extra rooms in Truro 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:
- 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.
- The Fire Safety Order 2005 applies to the common parts of HMOs, enforced by the fire and rescue authority.
- 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 Truro?
| Item | UK typical | Local guide | Per |
|---|---|---|---|
| Single-storey extension, about 15 m² | £35,000 – £60,000 | £36,400 – £62,400 | project |
| Single-storey extension per m² | £1,800 – £4,000 | £1,850 – £4,150 | m² |
Prices in Truro are shown with our regional adjustment for South West (above the UK average). Your quote is itemised and fixed in writing once the scope and specification are agreed.
How long does it take?
Most jobs of this kind take 8–14 weeks. If a council deadline applies in Truro, tell us at the first call so the programme is built around it.
When do Truro landlords need it?
We usually get the call when:
- Moving to more sharers with consent
- A kitchen too small for the number of sharers
Questions about extensions for extra rooms in Truro
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 cover all of Truro?
Yes. We work across Truro and the TR1 postcode areas, plus the rest of Cornwall. Nearby places we also cover include Falmouth, Redruth, Newquay.
Where do I check the HMO rules for an address in Truro?
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 Truro?
Our guide ranges for South West 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 Truro
- Falmouth · 8 mi
- Redruth · 8 mi
- Newquay · 10 mi
- Camborne · 11 mi
- St Austell · 13 mi
- Plymouth · 41 mi
- All of Cornwall