Dear Joey, 
My ming gua is Metal, West group, 
I am building a house. Facing Direction South, Main door facing north. Land size, width 14m, length 22 m
Because of house building rules, the 6m front part of the land cant be build and therefore will function as a front garden and carpark. 
 1. To determine the areas within the house, sheng qi, tian yi, etc. Do i need to find the center of the house? or the center of the land ? 
 2. Is it true that when building the kitchen, the gesture when cooking should not be shoving towards the main door as it will throw away wealth? 
 Thank you very much,
regards,
Joie