After you mutiplied lenth and thickness of everyroom do join them together? our builder asked us how many square footage would we want our...
our builder asked us how many square footage would we want our new house, i know how big i want respectively room.
No you multiply the length by the size: example 10X12= your answer. that should be close enough for him IE; 10 ft X10ft = 100 square feet . length times wideness
If you draw the floor plan as to how all the rooms and hallway connect, just multiply the overall length by the overall width. as contained by 50' long by 30' wide would be 50x30=1500 square feet. Or yes, you would donate all the rooms together. last time i built a house for someone using that method, they finished up with a house so big that they ended up selling it and buying a smaller one.
Answers: Your math is correct. Your assumption is wrong.
It is not ONLY how many square feet per room, but how they fit together. That is one cause why it takes some archetectual skills to design a house.
The best bet is for you to tell him the dimension of EACH room, identify the room, and letting him choose the plans that group your needs. You need to check those plans back either of you commits. It may be difficult to meet your exact numbers, especially near a good layout.