The Common Gull nests both in colonies and as isolated pairs. The nest is placed on islands and skerries, on rocks and in coastal meadows, but also on roofs, posts and artificial platforms in built-up areas. The female usually lays 3 eggs, which are incubated by both parents for about 24–27 days. The young leave the nest early but are fed and guarded by the parents until they fledge after around five weeks.