built-up

Made of sections or layers, one on top of the other.
Having increased in size, quantity, or intensity over time; accumulated.
Constructed or enhanced.
Having buildings, especially having residences and high population density.
(British) (of an area of land) Having street lights and therefore subject to a 30 mph speed limit.
(Europe) (of an area of land) Having specific traffic signaling and therefore usually subject to a maximum 50 km/h speed limit.