We recently completed this project in Roland Park. This customer had flooding during heavy rainfalls that completely washed out his entire front and side yards. We installed a box drain with underground schedule 40 piping and graded tiers of river stone to solve the problem. The area was then seeded with stabilization matting and liriope plantings.
We also do grading, natural sumps, berms, swales, downspout disconnects, bio-retention ponds and mogul waving to handle large water issues on the residential landscape.