Advice on Plumbing Scope for Pool House ADU Conversion (233 sq ft Studio)

[Dock Newell Jr]

Hey everyone,

I'm working on converting my pool house into a small studio ADU and would appreciate some input from those who have done similar projects. I'm also currently looking for a good plumber in the Florida Panhandle area if anyone has recommendations.

The structure is already built and has water supply and a drain line stubbed, along with its own subpanel for electrical. The space measures 183" x 183" (~233 sq ft) and I’m aiming to turn it into a simple Airbnb studio / guest suite.

The layout plan is roughly:

• 5’ x 7’ bathroom

  • 36"x36" shower

  • toilet

  • small vanity

• Kitchenette

  • sink

  • compact fridge

  • microwave

• Open studio area with bed + seating

• Mini split HVAC

The goal is to phase the project and get it income-ready first, not overbuild it.

What I’m trying to determine from the plumbing side:

1. What should I expect for rough plumbing scope for a setup like this?

2. If the drain line is already stubbed, what are common issues that come up tying in toilet + shower + sink in small conversions?

3. Any recommendations on small electric vs tankless water heaters for a studio ADU like this?

4. Anything I should make sure is planned before drywall goes up?

This will likely be a short-term rental or mid-term rental once finished.

If anyone has done a pool house or garage conversion ADU, I’d love to hear what plumbing challenges you ran into.

Also open to plumber recommendations in the Crestview / Fort Walton / Destin area if anyone here is local.

Appreciate any advice.