Hi I own a 3 bed semi with attached garage which has been converted into a bedroom and kitchen extension. The mrs wants a second story building onto the top of the garage creating a second story. Was told to dig a test hole on corner of the garage which is a cavity wall. Brick and block... in doing this my and the son have gone below the water table. The house is lower than the road and the front drive slopes downwards to house. Been pumping the water out into my manhole for a few hours but it just fills back to same level..its clear water..will this take months to shift. Will take some pics later