You should call and get a few quotes from different companies.  Since yours is a new house, your neighbors are likely need to have theirs done as well.  You could get discount if you have a few houses (at least two) do it together.  
 
When you get the quotes, don't just compare $$$, you have to make sure you compare the work.  They should provide you a drawing of how many and where the downpipes be located.