Hello! Welcome and good luck on your build!
Even if you get approved plans from someone else, it's probably unlikely that you'll be able to use them yourself. Your permit will probably have to include a site plan, and your local regulations may be different, and also your city ordinances may require a certain blueprint template. I had a minor delay in my build when the pool engineer accidentally drafted plans using the template from the neighboring county. I think there's a pool engineering website that owner-builders use. I don't recall it offhand, but it seemed to have good reviews back when I was considering the owner-builder route.
If I may offer some unsolicited advice on the owner-builder idea, I'd strongly suggest not to unless you have some serious skills. I very nearly went that route and I'm really glad I didn't. I'm fairly handy in a "can build a fence or shed" sort of way, but building a pool is in an entirely different league. Even now, over a year later, I'm still learning things about the design that I never would have thought of myself. My builder also occasionally had his crew come back and re-work things that he thought weren't quite up to par, and they were never anything that I would have caught on my own. Perhaps most importantly, a pool is not something you can easily redo if you get it wrong. It's not like adding a room addition or remodeling a bathroom. If you pour the shell and later discover that the plumbing wasn't quite done correctly, be prepared for some serious bills. You definitely can't rely on inspectors to catch everything either.
That said, if you *are* seriously skilled and/or you have your heart set on the OB route, then best of luck! I look forward to seeing progress reports.
