Interesting topic and worth a discussion.
This is true that BTs (at-least theoretically) and to large extent practically too imposes good conditions for constructed structures as compared to the rest. In general, people many a time complain about construction costs and sometimes having an impression that in BT during house purchase they are being ripped off but construction can be expensive in BT due to more requirements for structure, compared to its counterpart societies.
Collapse of Margalla Towers in 2015 was a tragic incident and an eye opener but after decade+ of the incident no investigation had any findings/results. Hope the high risers have safe future due to human lives involved.
Why did Margalla Towers collapse? No answer yet
October 8, 2015
https://tribune.com.pk/story/969471/why-did-margalla-towers-collapse-no-answer-yet/
Unfortunately, the (public sector) structural engineers or their concerned departments can approve a high risers made out of paper and wood as fully fit, if one has enough $$ to massage their greed.
Another issue is land filling or depression areas. The structures constructed on them despite passing all structural checks may suffer gradual degradation over time. Following is also a discussion that I started sometime back on an unfortunate instance of BT LHR plaza collapse due to possible land excavation. Also, as a personal experience, I bought 7 Marla double story in Umer Block P-8 (about 4 - 5 years old) but some solid cracks started to emerge right under the ceiling.
In a nutshell, yes more standards/checks need to be imposed especially on the one that go beyond 2 stories whether residential and commercial. Also, land/soil can can be important to avoid filled or depressed plots to avoid any later hassle and big maintenance costs.
https://www.zameen.com/forum/discussions/buying_property/bahria_town_construction_standards_is_that_all_a_hoax_-29844.html
