Can I disassemble a mansard roof?

I wish I have a better picture but here it is:
http://img.villagephotos.com/p/2005-10/1090906/exterior.jpg
The house has a flat roof. Towards the left side is a two story portion of the house. The roof of that is actually a flat roof, the small sloped portion I was told is called a Mansard roof. I hate the way it looks but I don't know if this mansard roof part is decorative or structural? Is it part of the roof framing? or can I take it apart and make it into a simple 90 degree angle flat roof without reframing the roof?
I know this is probably more a question for a contractor, but this is a house I plan on putting an offer on and I need to get as much information as possible about what can and cannot be done.
Thanks in advance,
MC
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MiamiCuse wrote:

It could be framed in any number of ways. The odds are pretty good it was tacked on, but you won't know until you poke a hole or gain access to the attic.
It's possible to rework anything in residential construction - if you have the money. Most likely it's not a huge amount of money to disassemble it, but you'll have a lot of work putting it back together, particularly the roofing.
R
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MiamiCuse wrote:

Check with the building department in municipality where the home is located - should have drawings. Consider ductwork, etc., in the plan.
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MC, you've posted a number of questions about that house. They should be looked at and answered together. The solution to any one problem will have a ripple effect, and so they should be looked at as a system. To get your money's worth out of the project, you need a design pro to look at the whole house. The fee would be cheap insurance. TB
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