Complex sentence: The houses within Batavia are described as being fairly tall with a narrow façade and plastered walls inset with crossbar windows provided with rattan wickerwork for ventilation, and as in the Netherlands they were mainly terraced houses with small courtyard.
Split into simpler sentences: The houses within Batavia are described as being "fairly tall with a narrow façade and plastered walls inset with crossbar windows provided with rattan wickerwork for ventilation". And as in the Netherlands they were mainly terraced houses with small courtyard.