Helsinki is well represented by most international chains; check out the colourful and contemporary Scandic Paasi with its spacious, stylishly circus-themed family rooms, some with their own sauna.
For accommodation suited to family holidays in the far north of Finland, see our Lapland page.
In summer, do as the Finns do and stay in a lake-shore cottage or mökki (they can also be found at some ski resorts). Simple cottages can cost as little as €20 a night but the cheapest won’t have electricity or running water (you bathe in the sauna and lake, and there’s an outhouse loo). Lomarenga (lomarengas.fi)and Nettimökki (nettimokki.com) are reputable agencies.
Or adventurous families can stay for free by taking advantage of Finland's Every Man's Right (jokamiehenoikeus), by which you are permitted to camp, hike, berry and mushroom pick, and fish on uncultivated land.