When you run your own business, either alone or with other people, you have control over far more than your own office.  You decide where you should run the business from and what the general plan of the whole building should be.  

If you haven't yet set up your business, or if you need to move into now premises, you should make sure you choose a site which has good Feng Shui.  The first thing to do is to consider the history of the building, since it has its own chi energy just as we have our own internal chi energy.  The building's chi energy will be influenced by what has in it before, so you need to make sure it has a positive tract record.  If the previous business located in it have fail, this is a bad sign.  

Look at the entrance to to building - the one your customers will see - dispassionately.  Is it welcoming?  Does it invite you enter?

The Home Office

In today's world, more and more people are working from home, and this trend is likely to continue.  If you work from home it is best to have a separate home office.  This means that you are working while inside it, but once you leave it and perhaps, close the door behind you, you are no longer at work.  The best position for this room is to face south, which is the fame direction.  However, if it is to be used more as a study then an office, a better location is facing northeast, which is the knowledge directions.