ᐅ Do we need a sewage lifting system, as the architect suggests?

Hello! My architect (very old and always stressed) says that I need a lifting station. However, my sewer connections are 2.5m (8 feet) below the foundation slab. What should I do?
Thanks in advance!

What is the reason for the lifting station? Also, not all lifting stations are the same!

What is the reason? How far is the distance to the sewer that needs to be covered? Is there a risk of flooding? Is it assumed that there will be a basement?

Specifically, a sewage lifting system.
The street level is 1.5 meters (5 feet) higher than the house. No risk of flooding, hillside location. No basement present.

If the lowest toilet is the guest bathroom on the ground floor below the sewer line, you will likely need a lifting station (or pump system).

Below the main sewer line, or below the sewer connections? The toilet is positioned lower than the main sewer line but higher than the connections to the sewer, as mentioned, on a slope.