I had the same thing happen to a house in Charlotte I inspected…it became a deal killer… the client and the agent were both happy on how I reported it and they moved onto another deal.
I simply stated the following;
*While the grade around the foundation is satisfactory, there is significant spalling to the exterior block veneer and extensive efflorescence to the interior of the garage foundation walls; this is indicative that moisture is wicking into the foundation. Presently there are no indications that this condition has affected the structural integrity of the foundation however further evaluation by a licensed general contractor is warranted to determine the origination of the moisture and what remedies may be necessary. *
Privately I advised the client to have the homeowner to provide the last 12 months utility (water) bill to see if there may be an leak as well as speaking with neighbors about to see if they are aware of any underground springs in the area. When all was said and done they felt that there was an underground spring based upon the fact that the utility bills were about average for the neighborhood and the neighbors themselves said the yard was pretty much wet year long. The house by the way was 10 years old.
Hope that helps…
PS. The house in Charlotte was on Waverly Lynn…it has the same siding that your has… it would be funny if its the same house. lol