Drainage issue from rain. In NJ

[Chris Breezy]

I recently inherited a house in nj it's on ground which is not the norm since hurricane sandy, most houses are on stilts. The house is only worth 100k at best so I don't want to put 30k into it just to raise a junk house. The grass is not level and it's causing the front of the house to sag. Any advice on how I can prevent the build up of rain from damageing my house