- Nation
- England
- Pricing region
- East of England
- Postcode areas
- SG, AL, WD, HP
- Main towns
- Watford, Hemel Hempstead, Stevenage, St Albans, Welwyn Garden City
What does commercial and above-shop to HMO in Hertfordshire involve?
- New kitchens, bathrooms and ensuites
- Survey of structure, services and access
- Windows and thermal upgrades
- Separate entrance and protected escape route
- Sound insulation to floors and party walls
- Coordination with planning and building control
Which rules apply in Hertfordshire?
- 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.
- Where the building regulations apply to a conversion, Part E sound requirements can apply between rooms and floors.
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 does commercial and above-shop to HMO cost in Hertfordshire?
| 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 | £3,700 – £6,900 | letting room |
| Panel alarm system (Grade A type), larger HMO | £1,750 – £4,500 | £1,850 – £4,750 | house |
| Acoustic ceiling or floor upgrade, 12–15 m² | £800 – £2,700 | £850 – £2,850 | room |
| Communal HMO kitchen with extra cooking and sink capacity (our estimate from domestic ranges) | £8,000 – £18,000 | £8,500 – £19,100 | kitchen |
| Ensuite shower room added to a bedroom | £4,000 – £10,000 | £4,250 – £10,600 | ensuite |
Typical time on site: 12–24 weeks. For a figure for your house, try the guide-price tool.
Commercial and above-shop to HMO by town in Hertfordshire
- Watford
- Hemel Hempstead
- Stevenage
- St Albans
- Welwyn Garden City
- Cheshunt
- Hatfield
- Borehamwood
- Hitchin
- Hoddesdon
- Letchworth Garden City
- North Watford
- Harpenden
- Bushey
- Hertford
- Rickmansworth
- Potters Bar
- Berkhamsted
Questions about commercial and above-shop to HMO in Hertfordshire
Do you work on listed or conservation area buildings?
Yes, with the right consents in place. Older high street buildings often need extra care with windows, fire upgrades and sound insulation.
Is building control needed?
Yes. Changing commercial space to residential use is a material change of use and needs building regulations approval.
Do you carry out commercial and above-shop to HMO across Hertfordshire?
Yes, across the whole of Hertfordshire, including Watford, Hemel Hempstead, Stevenage.
Who licenses HMOs in Hertfordshire?
HMOs in Hertfordshire 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 Hertfordshire
- Large HMO conversions (7+ sharers) in Hertfordshire
- Escape routes, emergency lighting and fire stopping in Hertfordshire
- Sound insulation in Hertfordshire
- EPC and energy upgrades in Hertfordshire
- Rewires and EICR remedials in Hertfordshire
- Layout changes and room reconfiguration in Hertfordshire
- Void and between-tenancy refurbs in Hertfordshire
- Professional and co-living HMO refurbs in Hertfordshire