Height of shower base

[Richard Roshak]

Is there a height limit a shower base can be above a floor? See attached photo.

[Markus Keller]

I'm not aware of a height restriction. If there is it would probably apply to the manufacturing portion of the shower base not the installation part. Like I said though I'm not aware of one.
More importantly that installation is a trip hazard going in and a fall hazard coming out, especially for kids or older folks. That's essentially 1 1/2 steps up.
The following may be a local thing but around here whenever we see a shower raised up like that or a bathroom floor that has been raised up its pretty safe to assume that the drain lines are some combination of not compliant, in the process of becoming a problem and/or not done by an actual Plumber.

[Jim Robinson]

I would not worry about it unless it was higher than a standard tub. We have that situation almost every day in an inspection. Was the floor in the shower level with the bathroom floor or sunken even lower?

[Jerry Peck]

I would not worry about it unless it was higher than a standard tub.

Or even some Jacuzzi and other brand hydromassage tubs.

We removed a Jacuzzi tub and put in a shower for that very reason - getting to hard to step over that high tub side for a shower. We didn't want to jack hammer the slab out to put in a zero threshold shower, but at about 3" high, the curb height should be okay for the long run.