But The Sunday Times understands that the ninth floor is as big as the eighth-floor unit, which is about 5,200 sq ft, excluding a rooftop terrace.
A video of SCDF officers inspecting the clandestine unit last Tuesday shows that it - unlike a racking system - is constructed like an enclosed floor, with interior fittings.
Already a subscriber? Log in
Read the full story and more at $9.90/month
Get exclusive reports and insights with more than 500 subscriber-only articles every month
ST One Digital
$9.90/month
No contract
ST app access on 1 mobile device
Unlock these benefits
All subscriber-only content on ST app and straitstimes.com
Easy access any time via ST app on 1 mobile device
E-paper with 2-week archive so you won't miss out on content that matters to you
