the first I can say is that QMC is just not worth it to use it. U should work with adaptive subdivision instead and get the file good adjusted which will take several renderings until you will be where you want to be. QMC ALWAYS has artefacts in the renderings... good for you to see fast how it will come out but never to be used for final renderings.
To your house: add some displacement is what I can say as there nevr is a house with such accurate lines... but for an architectural company this might be more attractive the way it is... you should ask the customer how they want it...
the bleeding and other things you can only really see when you have your materials added and rendered the house with the exact materials. shaddows in real world often have the color of what is next to them... so it can look realistic even you have some color bleeding in there.
If you want to mirror the environment in the windows of the house it is best to use a hdri in the environment of your 3d program.
well, not much to say to the building - nice and detailled so far.
modern Architects don't like adding plants or so but I still prefer it when there is something that makes the scene a little more realistic - usual is to copy paste some people in there to show how it would look when someone lives there, but here should be said: less is more
letz see the project when you are done or at least after you have textured and rendered it as preview - that would be interesting.
Linear Mode
