What changes the price

• Finish quality Plain, functional finishes suit budget or student lets; a higher specification — better flooring, fitted furniture, upgraded bathroom fixtures — suits professional tenants and commands higher rent. Your target tenant should drive this decision, not just the budget.
• Structural work Removing chimney breasts, replacing floors throughout, and the overall size of the property all add cost — stripping and rebuilding a large property throughout is a different job to a smaller, more contained conversion.
• Ensuite vs shared An ensuite bathroom in every room commands higher rent but adds plumbing, waterproofing and fit-out cost to each individual room, compared to shared facilities.
• Kitchen provision A single shared kitchen for the whole property is the simpler, lower-cost option. Adding wet kitchenettes to individual rooms or room clusters gives tenants more independence and suits higher-spec lettings, but significantly increases plumbing, electrical and ventilation work.
• Fire safety Interlinked smoke alarms, heat alarms in kitchens, and fire doors with self-closers on every bedroom and communal room are required for a licensed HMO, and apply regardless of room count.
• Additional space needed If the existing layout can't achieve compliant room sizes through reconfiguration alone, a dormer or extension adds the extra floor area needed — this is new-build work on top of the internal conversion, not instead of it.
• Planning route Small HMO conversions (3–6 occupants) are often Permitted Development, but this right is removed in Article 4 areas — some parts of Greater Manchester included — meaning full planning is needed instead.