Thanks Brian
Actually I am not looking for a How-to-fix book. What I am looking for is some sort of "homeowner math assistant" type book, if that makes sense. As I said above, I once saw a book which had a section on math for home finance, math for home repairs, etc.

What triggered the need of such a book is a conflict between me and the engineering office about exact dimensions in some corners of the new house which I am planning to build. Land looked like a rectangle, and it is almost a rectangle, but in fact is 'slightly' a parallelogram. They got it wrong in some dimensions, and I wanted to do my own math to be sure about a few things.

I did two calculations and got 25.5 cm, and 24.8 cm , with an average of approximately ~ 25 cm ( ~10 inches). My son did different calculations and got 32.8 cm. So, I wanted to upgrade my bookshelf in the area of geometry and home-related math.

OK. I can see many eyebrows about the 'insignificance' of these numbers related to a HOUSE. LOL. They are not that big of a deal in themselves, but they are necessary for some other details.