Balcony design approach is about the same as for any other room in the home. First you need to decide on its functions and purpose, style and color scheme. Will it be soft lounge area in Oriental style, cozy nook for reading or green area? Neither small size nor the northern climate is not an obstacle to this, just look at the stylish and cozy Scandinavian balconies.
The balcony finishing is better to give preference to materials suitable for outdoor use. As a floor covering can be used to steady precipitation and damage tiles (it is important that the tiles had anti-slip properties), artificial grass and decking. The latter option is optimal, since, although the cost of other more expensive in terms of safety and comfort.