I have found a Davenham floorplan here. The toilet will have poor ventilation unless there is suction fan. The toilet should have been located next to the side as most cluster semi-D layout with window for ventilation.
http://ewayc4.wix.com/iskandarproperty#!eco-botanic-davenham-floor-plan/zoom/c1w8r/imagefnu
http://ewayc4.wix.com/iskandarproperty#!eco-botanic-davenham-floor-plan/zoom/c1w8r/imagefnu