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Dwelling Units — Density × Katha Method

বাসস্থান ইউনিট — ঘনত্ব × কাঠা পদ্ধতি

Two ways to think about units

PlanBD shows three unit estimates:

MethodMeaning
PermittedDesirable density (DU/katha) × plot katha — planning target
MaximumPermitted + 10% for A3 apartments (discretionary allowance)
FAR-basedMax 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. [1]

    Desirable density per block

    SRO 466/2025 · Appendix 3.6

  2. [2]

    A3 +10% discretionary allowance

    DAP · §3.6.4.1(d)

  3. [3]

    Low-cost housing unit minimum

    Bidhimala 2025 · Category A6

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