facing north; northern exposure
Describes a building, room, window, or site that faces north. Often used in real estate or when discussing sunlight and temperature.
This room faces north, so it's a bit cold in winter.
Soft light comes in through the north-facing window.
Faces west, gets strong afternoon sun.
南向き describes something facing south and getting good sunlight, while 北向き describes the opposite direction, which tends to be darker and colder.
Compound of 北 (north) + 向き (facing, orientation). The reading きたむき follows standard kun'yomi.