Dwelling Units — Density × Katha Method
বাসস্থান ইউনিট — ঘনত্ব × কাঠা পদ্ধতি
Two ways to think about units
PlanBD shows three unit estimates:
| Method | Meaning |
|---|---|
| Permitted | Desirable density (DU/katha) × plot katha — planning target |
| Maximum | Permitted + 10% for A3 apartments (discretionary allowance) |
| FAR-based | Max buildable area ÷ average unit size — reference only |
Density × katha formula
katha = plotAreaM² ÷ 66.89 (1 katha ≈ 720 sq ft)
PermittedDU = ceil(desirableDensity × katha)
A3 bonus = ceil(PermittedDU × 0.10) // A3 only
MaximumDU = PermittedDU + A3 bonus
desirableDensity comes from your density block (Appendix 3.6). Without a block assignment, density-method estimates are omitted.
A3 apartment bonus
Category A3 (flat/apartment) gets an extra 10% units above the desirable density cap — this is a discretionary allowance under DAP §3.6.4.1(d), not automatic approval.
FAR-based reference
Dividing total buildable GFA by typical unit size (from block metadata) gives a FAR-based unit count. This can differ from the density method — RAJUK may apply whichever rule is more restrictive at approval stage.
Run your plot in the FAR Calculator — section 7 Unit Analysis shows all three figures.
References
- [1]
Desirable density per block
SRO 466/2025 · Appendix 3.6
- [2]
A3 +10% discretionary allowance
DAP · §3.6.4.1(d)
- [3]
Low-cost housing unit minimum
Bidhimala 2025 · Category A6