The dream symbolism suggests that you need to make a change in the way you are leading your life, and you are hoping to do this without risking too much emotional turmoil. So you are trying to "edge yourself" around the change you need to make. But that won't work. You don't know how much unknowable experience and emotion you will need to face to make the change in lifestyle you want to make, and you don't want to let go of certain possessions--or beliefs or ways of being--that seem to be too distractive to protect at the same time as you take the risk of a life change you're not sure you'll be able to cope with with your normal abilities. There are parts of your identity that you can't make sure you'll be able to bring with you if you make the commitment to completing this change.
I hope you'll comment on what I have suggested, by mentioning how it fits your present transition (or threshold) state; for then I may be able to gain greater depth of meaning for the parcels, the wall, and the water. For example, What can you identify as as a "Wall" in your life, that contains and protects from flooding by some forces of life? But ultimately this structure is unable to help you make the change you now need to make, and your trust in it as a way of managing your own life could be getting in the way of what you need to do to adjust to the life changes you now face.