I have a project that entails roughly 1100 sf of patio and the township is requiring a storm water infiltration basin to be engineered and installed as a result of greater than 15 percent of the total property being impervious. Needless to say the additional cost incurred is going to be substantial and the homeowner is becoming increasingly frustrated with the project as she is dead set on staying within a certain budget. Between the engineer, the permits and renting the equipment to dig the pit, I am looking at close to 5K in extra costs, or roughly 20% additional. The way I see it, my options are to either scale down the design, change my style of paver and eat some cost, or find a viable alternative such as the permeable paver. I've never personally installed the Eco Paver or know anyone who has. In researching it online, it seems like it may be designed for this type of situation. I was wondering if anyone on here perhaps has worked with this system and can give some pointers. Also, has anyone overcome storm water management issues with this approach? I'd hate to lose this customer because they also want to give me all the softscape as well. I must say, as an impassioned landscaper who is branching out into hardscaping, one of the biggest frustrations has been dealing with the variance in township permitting regulations. I had this particular customer give me a lot of grief for not knowing about the drainage pit up front, but the fact is, I built a patio of the same size not more than 2 minutes away from her house and this was not required, so how the hell was I to know?! (Sorry, had to vent!) Any help would be appreciated!!