To build a pool deck, you’ll want to create safe, secure access with a freestanding deck that comes right to the edge of — but doesn’t attach to — your pool. In terms of design, your deck can border just a section of the pool, go halfway around, or encircle the entire pool. The surface should be wide enough for safe walking — 4 feet is a good minimum — and after that, it’s up to your imagination. Include a nice lounging area for sunbathing, relaxing and keeping an eye on kids.