reccomendations for remodeling slpitlevel ranch ?

Anyone have good results with re-modeling a split level ranch ? or have any advice on such a remodel ? or a link that has the advice ?
the house under consideration has a garage, middle, upper and lower level . The upper lower levels have about eight stairs each to the middle level. The front entrance opens on middle level into small hall way that connects to the three levels. Garage connected to middle level. The house is brick.
The idea is to add space above the middle level and possibly the garage, and to adjust roof lines or front (a face lift) to give a more modern appearence.
thanks for any ideas, thoughts or links, R
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