My house is approximately 7~8 years old, and we bought it newly built. The foundation is mainly clay, and I live in a relatively dry environment (Calgary, Alberta, Canada). It is a walkout house, so there is a slight grade away from my house.
Recently, I dug some post holes for a deck near the house, and 3 or 4 feet down, water began pooling (approximately 20~30cm deep). This was following an infrequent, but repetitive rain lasting about a day at one time.
The question is, is it natural for that much water to form that shallow and close to the house foundation? I was not conscious of the issue until lately, and understood the importance of lowering downspouts during the rainy season.
Is this a concern, and if so, what can be done to remedy the issue?