An HMO extension adds space to a shared house, usually a ground-floor bedroom with ensuite or a bigger communal kitchen. Plymouth is in Devon. We price extensions for extra rooms there against England’s HMO rules and the council’s written HMO standards, so work is planned to the standard an inspection looks for. Plymouth has a university population, so many shared houses are let to students on yearly tenancies, and summer is the main window for works.
- Area
- Devon, England
- Postcodes
- PL1, PL2, PL3 and PL4
- Council
- Plymouth City Council
- Pricing region
- South West
What do extensions for extra rooms in Plymouth involve?
- Party wall coordination where needed
- Ensuite drainage and extraction
- Kitchen or bedroom fit-out
- Fire separation and detection extended to the new space
- Heating, insulation and glazing
Which rules apply in Plymouth?
Here is what usually applies to a Plymouth job of this kind. It is general information rather than legal advice, and the council’s written HMO standards have the final detail.
- 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.
Plymouth City Council: local HMO schemes
| Article 4 (HMO) | In force in part of the council area Article 4 Direction covering 11 neighbourhoods (incl. Mutley & Greenbank, City Centre, Stoke & Stonehouse, Lipson & Laira, Peverell) in force 14 Sep 2012. |
|---|---|
| Additional licensing | No scheme found |
| Selective licensing | No scheme found |
Schemes change. Check the council’s current pages for the exact address in Plymouth before you buy or start work. Source: Plymouth City Council HMO licensing page, checked 2026-10-31.
How much do extensions for extra rooms cost in Plymouth?
| 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 |
These are typical ranges including VAT, adjusted for South West, where costs run above the UK average. The fixed price for a house in Plymouth follows a site visit.
How long does it take?
Most jobs of this kind take 8–14 weeks. If a council deadline applies in Plymouth, tell us at the first call so the programme is built around it.
For student houses in Plymouth, booking by spring is the safest way to make the summer gap.
When do Plymouth landlords need it?
Landlords in Plymouth most often ask us for this when:
- A kitchen too small for the number of sharers
- Moving to more sharers with consent
Questions about extensions for extra rooms in Plymouth
Will the extension affect neighbours?
Possibly, if it is on or near a boundary. Party wall procedures may apply in England and Wales.
How far do you travel from Plymouth?
We cover the whole of Devon and work UK-wide. For Plymouth the nearest towns on our list are Plymstock (2 miles), Paignton (26 miles), Newton Abbot (26 miles).
Which council covers HMOs in Plymouth?
Plymouth is covered by Plymouth City 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 Plymouth?
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 Plymouth
- Plymstock · 2 mi
- Paignton · 26 mi
- Newton Abbot · 26 mi
- St Austell · 28 mi
- Torquay · 28 mi
- Exeter · 36 mi
- All of Devon
Other HMO services in Plymouth
- Loft conversions for extra rooms in Plymouth
- Communal kitchen refits in Plymouth
- Layout changes and room reconfiguration in Plymouth
- Large HMO conversions (7+ sharers) in Plymouth
- Ensuite installation in Plymouth
- House to HMO conversion in Plymouth
- Damp, mould and HHSRS repairs in Plymouth
- EPC and energy upgrades in Plymouth