Ask the designer
It is possible to retain the existing roof depending on the scale of work being done which may save on cost. However it is best to consult your builder/ structural engineer about the feasibility of retaining the existing roof. Also consult them about both options before making and big decision especially in relation to structural issues.
There are three types of roof styles:
Hip style roof has always been a classic option and will remain timeless. Being a cost effective solution it offers wider eaves which provides good shading around the home and prevent rain from discolouring wall surfaces.
Skillion roofs are a more modern option and have been a trend since the early 2000’s. Though being a more modern option it is still a cost effective solution and provides good protection from the elements.
Parapet walls are currently in style as can be seen in modern style homes. By hiding the roof planes and gutters from ground level view, it gives your home a clean and crisp look modern look.
It is important to choose the right roof for the right areas of your home. Consider the orientation of the sun in relation to your opening and ensure that it meets the room’s functional needs.