The polycount of a model or a scene depends on many things, so 1500 polygons might be far to high under certain circumstances while it is not detailed enough in others.
Example: in an architecture visualisation you might spend the 1500 polygons on the water tap while in a mobile game the whole scene is made of only a few thousand polygons.
As for your Kitchen i’d say it’s very lowpoly by todays game standarts and certainly lacks a lot of detail if it’s meant to be for visualisation.
It even starts with your overall design of the scene.
The working plate shouldn’t be just a texture on the top, it should have a volume.
Maybe you should reconsider the black tiles all over the room, make things more distinctable.
Also your kitchen looks more like a bathroom to me.
Why not having actually cupboards under the plate?
You currently wasting a lot of storage space just for a working plate and a sink.
The sink should have a border as well, usually they are put into a hole in the plate from the top.
If you want to keep the faucet that way you should use different handles.
Right now you’re using two single handle ones next to a single faucet.
Rather use round handles for a double handle setup.
Get good references of faucets before starting to model one.