Complex sentence: Since the late 1990s and early 2000s, there has been a rapid expansion in housebuilding in the town, with 400 new houses built on the north side of the villiage in the last 5 years.
Split into simpler sentences: Since the late 1990s and early 2000s, there has been a rapid expansion in housebuilding in the town. It is currently expanding rapidly, with 400 new houses built on the north side of the villiage in the last 5 years.