FSI & redevelopment feasibility calculator
Answer one simple question, fill in a few details about your plot, and see the permissible FSI, rehab and saleable area, rent, corpus and rough feasibility — instantly. No jargon needed.
The FSI calculator estimates the permissible FSI, rehab area, saleable area, rent, corpus and indicative feasibility for a housing society plot in Mumbai under DCPR 2034. It covers both the 33(7) scheme for cessed buildings and the 33(7B)+20(B) scheme for non-cessed societies, and shows results instantly as committee members type in plot details.
Is your building a cess (cessed) building?
What is a cess building?
Cess building redevelopment DCPR 33(7)
Fill in what you know about your society — every box starts at zero. The results below update as you type.
Results — 33(7)
Note: 33(7) incentive is calculated on your aggregate existing carpet. The detailed model applies per-tenant caps (residential 27.88–120 sq.m / 300–1292 sq.ft), so a full survey may adjust these figures. Feasibility is indicative — confirm approval premiums with your PMC and lawyer.
Non-cess redevelopment DCPR 33(7B) + 20(B)
The base scheme is 33(7B); 20(B) adds extra FSI in exchange for an affordable-housing (PTC) component. Fill in what you know — every box starts at zero.
Results — 33(7B) + 20(B)
Note: 20(B) unlocks the extra FSI up to the road-width ceiling (3.0 up to 18 m, 4.0 above); the affordable-housing / PTC share is provided to MCGM by purchasing PTC units — shown here as a cost. Feasibility is indicative — confirm all premiums with your PMC and lawyer.
What are the DCPR 33(7) and 33(7B)+20(B) schemes?
33(7) governs the redevelopment of old cessed buildings in Mumbai's island city. The extra buildable area comes from an incentive FSI that depends on the ratio between the land rate and the construction rate, and on the number of plots and tenants. 33(7B) is the base regulation used for such redevelopment today, and it is combined with 20(B), which grants additional FSI in exchange for handing an affordable-housing (PTC) component to the municipal corporation. This calculator implements both so your committee can see the permissible area and rough economics before a developer ever presents an offer.
Common questions
What is the difference between 33(7) and 33(7B)+20(B)?
33(7) is the regulation for redeveloping old cessed buildings in the island city, where extra FSI is driven by an incentive linked to the land-rate-to-construction-cost ratio and the number of tenants. 33(7B) is the base scheme for such redevelopment and is combined with 20(B), which unlocks additional FSI in return for providing an affordable-housing or PTC component to the municipal corporation. This tool works out both.
How accurate are these numbers?
The permissible FSI, rehab area and saleable area follow the DCPR rules and are reliable for planning and sanity-checking a developer's claims. The feasibility figures are indicative estimates based on the rates you enter; the exact approval premiums and per-tenant area caps should be confirmed by your project management consultant, architect and lawyer before any decision.
Related tools & guides
- Offer comparison tool — compare what different developers offer
- DCPR 2034 explained — the rules behind these numbers
- Free feasibility report — get a written view from our team
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