Another apartment basement and a prestigious restaurant have flooded, and more trees are dying in South Perth as major WA developer Finbar junks plans for the site billed to 'change the face of South Perth' amid chaotic groundwater changes.

Apartments at 100 Mill Point Road had their basement flooded for the past month, causing residents to speculate about what they have dubbed the 'Civic Heart Lakes' across the road.

Google photographs from November 2015 (left) show the trees outside the second flooded building alive. The trees are now apparently dead. Credit:Google Street View/Supplied

Finbar's builder Hanssen has for six months been pumping groundwater beneath the road from its adjacent Aurelia development site to Civic Heart, for re-infiltration via the ponds as per an approved management plan.

Street trees along the median strip on Civic Heart's other side have died in the past three months, prompting residents to speculate about salinity and the council to order an arborist's report.