A five-storey residential building under construction collapsed in Kinoo on Friday.
No one was injured.
Masons at the site said they had noticed structural problems and informed the owner but no action was taken.
They said they noticed a crack on one of the columns on Thursday, prompting them to stop construction.
On Friday, the building tilted towards one side before it crumbled as locals gathered to witness the incident.
Police arrived there minutes later and cordoned off the site as they waited for experts.
Officials from the National Construction Authority said the structure will have to be brought down and announced investigations will commence immediately to establish if the law was followed during the construction.
Last week, nine people were killed in Hurlingham, Nairobi, when a crane they were handling crumbled from a 14-floor proposed student accommodation.
One was injured.
Days later, three other construction workers were killed when a house they were constructing collapsed in Gachie area, Kiambu county.
More than 10 others were injured in the incident.
Rescuers took three days to clear the site and collected three bodies.
Nairobi and Kiambu among other regions are experiencing a construction boom with most buildings going more than six floors.
There are fears some of these structures are being constructed without proper supervision.