The goldcrest breeds in mature lowland and mountain coniferous woodlands, mainly up to , and occasionally to . It uses spruce, larch, Scots pine, silver fir and mountain pine, and in man-made landscapes also introduced conifers such as douglas fir. Breeding densities of up to 591 pairs per square km (1,530 pairs per square mile) have been recorded in Norway spruce in Ireland, and goldcrests constituted over 60% of all birds found in Welsh Douglas fir and Norway spruce plantations. Broad-leaved woods are used only when some spruce or firs are also present. Sites such as parks and cemeteries are used only when they offer suitable conifers that are not otherwise locally available. The height and nature of any undergrowth is irrelevant.