A commercial to HMO conversion turns space that was never a home, such as upper floors over shops or small office buildings, into shared accommodation. For a house in London 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
- Greater London, England
- Postcodes
- EC1A, EC1M, EC1N and EC1R
- Pricing region
- London
What does commercial and above-shop to HMO in London involve?
- Windows and thermal upgrades
- Coordination with planning and building control
- Survey of structure, services and access
- Sound insulation to floors and party walls
- Fire separation between the commercial unit and the homes above
Which rules apply in London?
Commercial and above-shop to HMO in London 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:
- Under the Renters’ Rights Act, civil penalties reach £40,000 for offences such as running an unlicensed HMO.
- 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.
How much does commercial and above-shop to HMO cost in London?
| Item | UK typical | Local guide | Per |
|---|---|---|---|
| Conversion works per letting room (walls, linings, electrics, decoration; excludes kitchens, bathrooms and fire systems; our estimate) | £3,500 – £6,500 | £4,500 – £8,300 | letting room |
| Panel alarm system (Grade A type), larger HMO | £1,750 – £4,500 | £2,250 – £5,750 | house |
| Acoustic ceiling or floor upgrade, 12–15 m² | £800 – £2,700 | £1,000 – £3,450 | room |
| Communal HMO kitchen with extra cooking and sink capacity (our estimate from domestic ranges) | £8,000 – £18,000 | £10,250 – £23,050 | kitchen |
| Ensuite shower room added to a bedroom | £4,000 – £10,000 | £5,100 – £12,800 | ensuite |
These are typical ranges including VAT, adjusted for London, where costs run above the UK average. The fixed price for a house in London follows a site visit.
How long does it take?
Typical time on site: 12–24 weeks. We agree the programme with you before starting and send photo updates as the work progresses.
When do London landlords need it?
We usually get the call when:
- A mixed-use building where the upper floors need bringing into use
- A small office building with planning for residential use
Questions about commercial and above-shop to HMO in London
Is building control needed?
Yes. Changing commercial space to residential use is a material change of use and needs building regulations approval.
Which postcodes in London do you work in?
All of them, including EC1A, EC1M, EC1N and EC1R, and the surrounding parts of Greater London.
Does a shared house in London need an HMO licence?
In England, a mandatory licence is needed for 5 or more people from 2 or more households. Smaller HMOs can need a licence where the council runs additional licensing, which is common in towns with many shared houses. Check the council’s website for the address.
How much does commercial and above-shop to HMO cost in London?
Our guide ranges for London 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.
Commercial and above-shop to HMO near London
- City of Westminster · 1 mi
- Pimlico · 1 mi
- Islington · 2 mi
- Camden Town · 2 mi
- Chelsea · 2 mi
- Chalk Farm · 3 mi
- All of Greater London
Other HMO services in London
- Large HMO conversions (7+ sharers) in London
- Escape routes, emergency lighting and fire stopping in London
- Sound insulation in London
- EPC and energy upgrades in London
- Rewires and EICR remedials in London
- Layout changes and room reconfiguration in London
- Student HMO refurbishment in London
- Small HMO conversions (3–6 sharers) in London