Bees who have done a major household renovation...looking for some input.

1) What was your project?
2) What was your timeline?
also - if you want to share the cost of your project great - I know people out there are inquisitive like me but have no idea what things can cost!

DH and I have basically decided that our home is our "forever" home...which means a major renovation is in our future. The biggest items for us is adding a 3rd car stall and expanding the kitchen/great room area - which means adding square footage.

Just wondering how far in advance you started planning? When you engaged a contractor or architect? When you got started and how long it took... Lots of questions!