I would think the price depends on how well known the architect is. I believe the better known architects will charge much more than that. Some architects will also charge you 15% of the construction project. If you choose wisely, you may find an architect who will save you money, even with you paying him 15%. Remember, architects will get a discount on construction materials, and they will reduce the number of mistakes you make. Also, the architect who does the plans should be the one who continues the work, as there are numerous smaller matters that will have to be decided as the work gets underway. The experience of the architect is invaluable there.