The most common issue we run into with modifications is when people don't have a clear idea of what they want. If you are thinking about modifications, you should always have a plan.
Have you planned and visualized each of your home design changes? Now all you need to do is find out how much your changes will cost.
When modifying a set of house plans, there are generally 3 main options with which to proceed. Your options greatly depend on the changes you have in mind.
As a general rule when it comes to modifying house plans, anything is possible. An experienced draftsman can usually make any change, but there are issues to keep in mind.