@ Opalu

please I have a plot of land in Shapati Ibeju lekki. It is water logged during the raining season. I intend to build a story building that is 11.8m by 6.5m . The structural engineer did not visit the site but did raft foundation that is 1.2m high. The plot is on a flat land. I observed that the plot is at the lowest part of the road and I believed that when the road is built in future it might be filled and if the foundation is not very high the building will submerge. I intend to add 1m block wall on the 1.2m ground beam and 300mm beam on the block wall before casting the ground floor slab to elevate the foundation to 2.5m. I will also include columns 3.5m interval on the block wall area as shown in the image below. Kindly advise.

Pls i have a plot in Ibeju lekki (shapati) it was dried during the dried season waterlogged during the raining season. The plot is on the lowest part of the road but it is flat. I want to build a story building that is 6.5m by 11.8m and i want my foundation to the 2.5m high so that if the road is filled in future the building will not be submerged. Is it possible to have 1.2m raft foundation, then 1m block wall and 300mm beam before casting the ground floor as indicated the attachment.

Pls advise