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 Rochester 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
- Kent, England
- Postcodes
- ME1, ME2 and ME4
- Location
- 28 miles east of London
- Council
- Medway Council
- Pricing region
- South East
What do extensions for extra rooms in Rochester involve?
- Party wall coordination where needed
- Foundations, structure and roof
- Ensuite drainage and extraction
- Building control completion
- Fire separation and detection extended to the new space
Which rules apply in Rochester?
The rules below are the England-wide position for this kind of work. Councils add their own standards and schemes on top, so we always check the address in Rochester before we price.
- 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.
- National rules ask for an adequate number of bathrooms, WCs and basins and suitably located kitchens; numeric ratios are set by each council.
Medway Council: local HMO schemes
| Article 4 (HMO) | In force in part of the council area Article 4 Direction for seven wards (Chatham Central & Brompton, Fort Pitt, Gillingham North/South, Luton, Strood North & Frindsbury, Watling), approved 16 Dec 2025, in force Jan 2026. |
|---|---|
| Additional licensing | Approved, starts 4 Jan 2027 Six wards (Chatham Central & Brompton, Fort Pitt, Gillingham North and South, Luton, Watling), 4 Jan 2027 to 3 Jan 2032. |
| Selective licensing | Approved, starts 4 Jan 2027 Seven wards (as additional licensing plus Strood North & Frindsbury), 4 Jan 2027 to 3 Jan 2032. |
Schemes change. Check the council’s current pages for the exact address in Rochester before you buy or start work. Source: Medway Council HMO licensing page, checked 2026-10-31.
How much do extensions for extra rooms cost in Rochester?
| Item | UK typical | Local guide | Per |
|---|---|---|---|
| Single-storey extension, about 15 m² | £35,000 – £60,000 | £39,200 – £67,200 | project |
| Single-storey extension per m² | £1,800 – £4,000 | £2,000 – £4,500 | m² |
Prices in Rochester are shown with our regional adjustment for South East (above the UK average). Your quote is itemised and fixed in writing once the scope and specification are agreed.
How long does it take?
Typical time on site: 8–14 weeks. We agree the programme with you before starting and send photo updates as the work progresses.
When do Rochester landlords need it?
Typical reasons for this work in Rochester:
- Moving to more sharers with consent
- Adding a ground-floor room
Questions about extensions for extra rooms in Rochester
Is a kitchen extension worth it?
Often, when the existing kitchen limits how many people the council will allow. A bigger kitchen can unlock an extra room.
Do you cover all of Rochester?
Yes. We work across Rochester and the ME1, ME2 and ME4 postcode areas, plus the rest of Kent. Nearby places we also cover include Chatham, Strood, Gillingham.
Which council covers HMOs in Rochester?
Rochester is covered by Medway 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 Rochester?
Our guide ranges for South East 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 Rochester
- Chatham · 1 mi
- Strood · 1 mi
- Gillingham · 2 mi
- Gravesend · 7 mi
- Maidstone · 8 mi
- Stanford-le-Hope · 10 mi
- All of Kent
Other HMO services in Rochester
- Loft conversions for extra rooms in Rochester
- Communal kitchen refits in Rochester
- Layout changes and room reconfiguration in Rochester
- Large HMO conversions (7+ sharers) in Rochester
- Ensuite installation in Rochester
- House to HMO conversion in Rochester
- Professional and co-living HMO refurbs in Rochester
- Rewires and EICR remedials in Rochester