Stwert, both of those are easily achievable.
35 degree angle between two elements, depending on what your referring to, you could possibly use the end sweep function on a nurbs surface, or you could snap align the two objects, and move the pivot accordingly and rotate 35 degrees in the appropriate direction.

As far as extrusion, as long as your units are set to the correct type I.E> Metric , Imperial, ect. and you know the dimensions, you can easily extrude a poly or group of objects exactly 4.5 meters Just by opening the channel box on the extrude operation after you activated the tool, and use the Translate for the correct axis(s) and enter 4.5 as the case may be.

you can also set your grid up so that each grid line represents a specific number of meters or inches, feet of what ever if this makes it easier for you.

I used to use autocad a lot as a civil draftsman for a surveyor in alabama, and personally I don't find the snap tools in autocad better then Maya's, you just have to know where all of Maya's are, and how to use them correctly.

So i suppose the answer to the original question which i took to mean can you use maya to design blueprints for a house, i'd say Yes.

G-man