Best way to take care of wet backyard?

Maybe prop it up on some cement pillars

You would need to set any building on blocks whether or not your yard stays wet. It would be helpful to know why your yard stays wet. Are you in a low spot that collects water from other areas? Do you have clay or hardpan that interferes with drainage? These may not even be visible (on the surface).

If your yard collects water because you are at a low point, you could put in a dry well or two to hold excess water. Ready-made drywells cost from $70 up, but you can make your own using a plastic drum or trash can, some gravel and a minor part or two. Here are a couple of YouTube videos explaining how one man made his. Part 1: https://www.youtube.com/watch?time_continue=1&v=tmDR5qnaQcU Part 2: https://www.youtube.com/watch?time_continue=8&v=2XOdhjvn8bw

If your yard won't drain because of heavy soil, then you need to steer extra water to one part of your yard. You don't need to bring in soil, but you will need to move some around. This is a swale: http://www.vizimac.com/wp-content/uploads/2014/08/Correct-Landscaping-Swale-Drainage.jpg It's a wide, low spot covered in grass. A swale can be connected to a garden area of moisture loving plants if you like. Here is a how to article: http://homeguides.sfgate.com/dig-swale-yard-53088.html

Lowe's and Home Depot sell catch basins and 4" flexible tubing that can be laid to route the water away from your intended shed area. I bought over 100" of tubing and three basins for around $75. You can find it in the garden department. Other than digging the trench to install it, the product is easy to put together and easy to configure to meet your needs.

You're welcome. Hope it works for you. I have She Shed envy!!

Find the lowest spot in the yard and dig a hol 1-2 feet deep and about 4 feet across. Line with brick and tile. Most of the water in the yard should drain down to it, you may have to change some towards the pool. Then plant some water plants. You can go so far as to get a little filter and pump then put some fish in for a nice water feature. Build the shed on the highest point of the lawn,.

Have you considered French drains? they are great for removing sitting water and getting it off the yard. We put some in. They are a lot of work, but not hard to do. You use your back and do a lot of digging but it is not difficult to figure and make them. You xan get them at your local home improvement stores.

Plant wild flower they can help soak up the water and are helpful for wildlife too

Plant wild flower they can help soak up the water and are helpful for wildlife too

Sand in your yard will help.