An HMO loft conversion adds one or two letting rooms, often with an ensuite, in the roof space. In Cambridge, a place of roughly 150,000 people, the work is planned around the HMO rules for England and the council’s written HMO standards. With students as well as working sharers renting in Cambridge, we plan bigger jobs for the gap between academic-year tenancies where we can.
- Area
- Cambridgeshire, England
- Postcodes
- CB21, CB22, CB23 and CB24
- Location
- 30 miles south-east of Peterborough
- Council
- Cambridge City Council
- Pricing region
- East of England
What do loft conversions for extra rooms in Cambridge involve?
- New stair within the protected route
- Ensuite where space allows
- Building control sign-off
- Feasibility and head-height check
- Dormer or roof windows
Which rules apply in Cambridge?
Loft conversions for extra rooms in Cambridge 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.
- 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.
- Licensed HMOs must meet national minimum bedroom sizes: 6.51 m² for one person aged 10 or over, 10.22 m² for two, and 4.64 m² for a child under 10.
Cambridge City Council: local HMO schemes
| Article 4 (HMO) | Proposed No small-HMO Article 4 direction in force; after a 2026 petition the council said (July 2026) it is building the case for one. No direction made yet. |
|---|---|
| Additional licensing | No scheme found |
| Selective licensing | No scheme found |
Schemes change. Check the council’s current pages for the exact address in Cambridge before you buy or start work. Source: Cambridge City Council HMO licensing page, checked 2026-10-31.
How much do loft conversions for extra rooms cost in Cambridge?
| Item | UK typical | Local guide | Per |
|---|---|---|---|
| Dormer loft conversion, about 30 m² | £40,000 – £60,000 | £42,400 – £63,600 | project |
| Rooflight loft conversion, about 30 m² | £22,500 – £30,000 | £23,850 – £31,800 | project |
These are typical ranges including VAT, adjusted for East of England, where costs run above the UK average. The fixed price for a house in Cambridge follows a site visit.
How long does it take?
Allow 6–10 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.
If the house is let to students, we work backwards from the next tenancy start date in Cambridge.
When do Cambridge landlords need it?
Typical reasons for this work in Cambridge:
- Adding rooms to make an HMO work financially
- A house with usable roof space
Questions about loft conversions for extra rooms in Cambridge
Does a loft room need a fire escape window?
In an HMO the main protection is usually a protected stair and fire doors. The building regulations and fire strategy decide the detail.
Do you cover all of Cambridge?
Yes. We work across Cambridge and the CB21, CB22, CB23 and CB24 postcode areas, plus the rest of Cambridgeshire. Nearby places we also cover include Newmarket, Ely, Huntingdon.
Which council covers HMOs in Cambridge?
Cambridge is covered by Cambridge 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 loft conversions for extra rooms cost in Cambridge?
Our guide ranges for East of England 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.
Loft conversions for extra rooms near Cambridge
- Newmarket · 13 mi
- Ely · 15 mi
- Huntingdon · 16 mi
- Haverhill · 16 mi
- Saint Neots · 16 mi
- Letchworth Garden City · 21 mi
- All of Cambridgeshire
Other HMO services in Cambridge
- Extensions for extra rooms in Cambridge
- Large HMO conversions (7+ sharers) in Cambridge
- Escape routes, emergency lighting and fire stopping in Cambridge
- Ensuite installation in Cambridge
- Layout changes and room reconfiguration in Cambridge
- Fire alarm and detection systems in Cambridge
- House to HMO conversion in Cambridge
- Shared bathroom and shower room refits in Cambridge