willows can be a large problem,mostly with foundations.wells if they are the old stone or tile type.if it is artesian well no tree roots go 100 or 2oo feet down looking for water.if you have older water or drainage lines then be concerned now.they will also sprout and grow about any where they can pop out from seed or damage.if they are properly mainmtained and structurely pruned they can be a very attractive tree.but in the long term if anything you are worried about is within30 feet it would be best to plan noe with a more satisfactory tree to your site that you can appreciate for years to come!!a nice flowering dogwood,a nice maple for your area ,a live oak can be a vey nice for shade and a touch of home feeling but may take longer than planting some quick growers.i am in vt so mabey someone from your area can help you more.good lucl DRANO DUANE
