The Cornish large-group market splits cleanly into two segments. The high-end conversions — former manor houses, large estate properties, architect-finished barns — usually deliver on capacity properly: two sets of fridge-freezers, a range cooker plus a hob, dishwasher big enough to clear after twelve, and bedrooms grouped on different floors so the under-tens can be put to bed without shutting down the lounge. The middle-tier stock is more variable: large floor area but a kitchen scaled for six, three bathrooms when you really need five, and a single hot water tank that empties by the fourth shower of the morning.
The interesting tier is what's emerging at the £3,000-6,000 a week level — purpose-fitted group properties with games rooms, hot tubs, professional kitchens and acoustic zoning. Sykes, Holidaycottages.co.uk and Cottages.com all carry a chunk of this stock; Cornwall Hideaways specialises in it at the top end. Booking a year ahead is normal for these properties at peak times (Easter, summer, Christmas, New Year). For wedding-party or milestone-birthday bookings, two-year lead times are not unusual.