A house with 3 rooms + a bathroom, a livingroom and a kitchen, different dimensions each, atm i didnt had a measuring tape so i made QD gross estimates by head by comparing wall sizes to beds/sofas, counting tiles(measured just with my palm) and similar stuff... and wrote em on a map draft...

After that we did grabbed a measuring tape to give the exact dimensions and measured lenght and width+ the diagonals to correct possible measuring errors, i nailed em all down to 10cm2 margin at the most!... i actually kinda surprised myself...