Dhaka's Rooftop Gardens — Municipal Tax Rebates for Urban Agriculture Amid Missing Building-Code Rules

Dhaka is one of the world's most densely populated megacities, with arable land shrinking rapidly at its edges; a Department of Agricultural Extension estimate puts the city's roof stock at over 450,000 rooftops covering roughly 5,000 hectares of unused space.
Since Bangladesh's 2018 National Agriculture Policy explicitly encouraged rooftop cultivation under "Specialised Agriculture," Dhaka North City Corporation (DNCC) has offered a 10% holding-tax rebate to residents who maintain rooftop gardens — a direct municipal financial incentive rather than a grant. City-tracked estimates put more than 30,000 rooftop gardens in operation, covering roughly 7% of the city's building-tops and growing around 45 varieties of fruit and vegetables.
Researchers and The Daily Star's investigative reporting find the practice remains legally unrecognised: the Bangladesh National Building Code has no rooftop-farming provisions, so new buildings are not designed to safely bear soil loads or drainage, and there are no density or floor-area-ratio (FAR) incentives for developers to accommodate it. Structural risk (dampness, damage) and low public awareness are cited as the main barriers to scaling beyond the current informal base.
This is a real, financially incentivised practice with tangible uptake, but it remains a municipal pilot-scale policy layered onto an unplanned, largely informal activity rather than a systematically monitored ecosystem-service programme; no city-wide data exists on stormwater retention, temperature, or biodiversity impact.

Read the full analysis: https://asianews.network/dhakas-rooftops-could-feed-the-city-but-law-keeps-getting-in-the-way/