Yes to the stairwell – it should never face the front door. You should also not have an unobstructed view of the back door from the front door – again all good things will flow right through the home, out of the home. If you have a home office, or in your workplace, you should have your desk placed so that you are seated facing people walking in – you never want to turn your back on business.
Also, if you are a true believer in Feng Shui, you won’t have a pool in the backyard and you won’t be situated on a cliff. Water flowing in the back means missed opportunities. Not to mention bad luck. On a cliff – too much sun, lack of harmony, not to mention the likelihood your house might end up collapsing.
4 is also an unlucky number in many instances – not all – because of its close intonation to the word death. You’ll notice a lot of buildings in Asia skip the 4th floor much like we skip the 13th. Therefore you may want to look at your address and decide if the numbers are lucky or unlucky. 24 is particularly unlucky – meaning you will starve to death. 44 is also unlucky, but 48 is very good as is most numbers with an 8 in it. 8 rhymes with prosperity.