You're right, it's a good question and the answer depends on the specific wording of the electrical code being followed (typically the National Electrical Code (NEC) in the US). Here's a breakdown: NEC 210.52(D) Bathroom Receptacle Outlet(s). This section states that at least one receptacle outlet shall be installed in bathrooms and shall be supplied by at least one 20-ampere branch circuit. It outlines the placement rules, like adjacent to each basin, but also covers situations where a basin isn't present. Key Considerations



What Defines a Bathroom? The NEC definition is important. A "bathroom" is generally considered an area including a sink (basin) and one or more of the following: a toilet, a tub, or a shower. No Basin

Since you're describing a room only with a toilet and shower, with the vanity outside the room, it can be argued that this space doesn't meet the definition of a "bathroom" according to the NEC.

Code Interpretation

Local electrical inspectors have the final say on code interpretation. Their interpretation is what matters for your specific project.

General Recommendation and Best Practices



Consult Your Local Electrical Inspector

This is the most important step. Explain the situation to your local electrical inspector and get their opinion. They will know how the code is interpreted in your area and can give you a definitive answer.

Install a Receptacle Anyway (Best Practice)

Even if not strictly required by code, it's often a good idea to install a GFCI-protected receptacle in or near the shower room. This adds convenience for things like cleaning equipment (vacuums, etc.) or potential future uses. It can also increase the home's value.*

If You Install a Receptacle

If you do install a receptacle, be sure it's GFCI-protected (as required in bathrooms/damp locations) and installed according to all applicable code requirements for location, height, and wiring.

In summary:

Technically, it seems as if the room does not require a receptacle because there is no sink. However, the BEST practice and what you should do is talk to the local electrical inspector. Flag for review