Oops, Yea- I fat fingered that from $50k.
But that's still roughly double/triple or more what street parking will cost (where space efficiency approaches 100% since driveways and additional
access pavement aren't needed).
Correct on double to triple for underground, but likely more for buildings with compact or less than ideal footprints (inefficient layout and access) and where structural and utility considerations need to be made for the building overhead.
But commercial grade (concrete/lanscaped) surface parking can easily cost $30k+/space, even in non-urban areas. A recent multi-acre university parking lot we did was just shy of $50k/ space (which is why parking garages start making economic sense around that price point), and that was in a 5 digit population college town on the outskirts of campus.
But the point remains that structural parking costs > surface parking costs >> street parking.
And that street parking shouldn't be thought of as subsidized[1], because as soon as it is considered free lunch for other pet purposes, developers won't relinquish control of it, and will potentially set buildings back an additional 8-25' (parallel-angled, per side of the street) to stay outside of minimum right-of-way widths.
[1] In addition to the fact that the dedication and assumption of future maintenance costs is in contractual consideration of the value of the land and improvements dedicated, additional generated tax revenue and economic growth, and is typically required by govt building codes.