The features that actually matter for family stays, ranked by impact on the week: walking distance to a lifeguarded sandy beach (or a footpath that takes prams); enclosed garden, properly fenced, ideally with grass; a kitchen big enough to manage breakfast for six without a queue; at least two bathrooms or a downstairs WC for the toddler-training years; a wet room or boot room near the front door; bedrooms grouped so the under-fives are on the same floor as the adults. None of those are luxuries — they're operational. Cottages that surface them in their listings have thought about families; cottages that lead with "log burner and country views" usually haven't.
Cornish family destinations split into roughly four bands. Premium beachfront (Mawgan Porth, Watergate Bay, Constantine, Daymer Bay) — high cost, low effort, the cottage does the work. Mid-tier walkable beach (Padstow surrounds, Falmouth's Gyllyngvase strip, Looe, Bude) — middle pricing, good amenities, family-tested infrastructure. Quieter coves (Maenporth, Trevone, Crackington, Hannafore) — lower cost, fewer crowds, you swap convenience for calm. Holiday-park alternatives (Haven, Park Holidays, Away Resorts) — all-in pricing, on-site pools and entertainment, less editorial character but fewer logistical headaches.