This novel comes close to offering a taste of Scheerbart's thinking and aesthetic, but what there is falls short in a few key areas.
First, Scheerbart's larger idea of openness/light/color/space as a means to expand or alter the consciousness is a grand and important idea (that architecture here therefore dominates vain personal choices like fashion is evident). However, while this claim finds it nuances and evolving contexts in the work, the consciousness work itself is largely absent. In other words, if you're looking for an introduction to Scheerbart's broader thinking, this will not provide it.
So that leaves the novel to stand on its own (unless you are reading it as part of a larger collection of Scheerbart). On this level, as architectural utopia, it's a fairly beautiful fantasy. A kind of turn-of-the-century steampunk-engineered foray into glass and light and color, there is nothing like it which I have seen. Though here, too, Scheerbart does not aspire to utopia, really. His works and designs remain for the very rich; that servants and workers are constantly on beck and call, are subjected to ever-changing work conditions, are offered no voice through the novel, and that no apologies or expectations are made that anyone will ever enjoy the new designs but those who can afford them and have idle money to spend--these do not a utopia make.
As a non-utopic novel, finally, it is passably interesting, though the personalities of the characters and their development seem incidental to our author. They are undeveloped or largely static, acting for motives which are singular or from an ennui of indolence. For this, however, the work is quite short, and reads more like an exercise in where and how color might be installed than a story where characters are important.
Satire? Irony? There is and there may be more than I saw. However, for satire to work, a reasonable anchor point must be established from which the absurd might be measured. If all the characters (and the larger society) are equally absurd, that irony is lost.
I enjoyed and appreciated the read; but I cannot recommend it to all but a very peculiar niche of readers.