Joint Development & Redevelopment Ratios — Mumbai & MMR

Mumbai's market operates on two parallel realities. Over 90% of new residential supply in Island City and the Western/Eastern Suburbs comes from the redevelopment of cessed buildings, MHADA layouts, SRA slum schemes, and old housing societies — not from greenfield JD agreements. Here, the transaction is between developer and existing tenants/society members, and the economics are driven by rehab carpet area entitlement, incentive FSI under Section 33 of DCPR 2034, and the corpus fund — not by a single landowner share percentage. In the Extended Suburbs and MMR Periphery (Thane, Mira-Bhayandar, Vasai-Virar, Kalyan-Dombivli, Panvel, Navi Mumbai nodes), traditional Joint Development applies: land owner share ranges from 30% (high-rise) to 50% (low-rise). In the Greenfield Belt and NAINA, share is 45-65% (villa and plotted), and CIDCO's NAINA land-pooling model returns 40% serviced plots to landowners on FSI 2.7.

Mumbai has almost no greenfield land left in the Island City or Suburbs — over 90% of new supply comes from redevelopment. The transaction structure is fundamentally different: developers do not negotiate a single landowner share, they rehouse existing tenants or society members for free (rehab area) in exchange for incentive FSI to sell on the open market (sale area), plus a corpus fund for long-term maintenance. The applicable DCPR 2034 section, the road width, plot size, building age, and tenant consent (now 51%, down from 70%) drive the economics. Only in the Extended Suburbs, MMR fringe, and NAINA do you see the traditional JD share-percentage model that operates in Bangalore, Chennai, Pune, or Hyderabad.

Bandra (West and East), Khar, Santacruz, Andheri (West and East), Goregaon, Mulund, Ghatkopar, Chembur, and most of the Western and Eastern Suburbs fall in the Suburban Redevelopment Zone. Applicable regimes here are mostly DCPR 2034 Sections 33(5) for MHADA layouts (Eligibility: 4,000+ sqm, 18+ m road, FSI up to 4.0, existing carpet + 35% with minimum 35 sqm to occupants); 33(7B) for non-cessed authorised housing societies (any size, 9+ m road, base FSI + 15% BUA, +10 sqm or 15% BUA per member); and 33(10) for SRA slum redevelopment (variable road, FSI up to 4.0+, free 300 sqft usable carpet minimum per rehab family). Mumbai's Suburban Redevelopment Zone alone has over 25,000 buildings eligible for redevelopment across MMR.

NAINA (Navi Mumbai Airport Influence Notified Area) is governed by CIDCO and operates primarily on a land-pooling model rather than traditional Joint Development. Under CIDCO's Town Planning Scheme (TPS) framework, landowners contribute 60% of their land and receive 40% back as serviced plots, equipped with trunk infrastructure (roads, drainage, utilities), allotted FSI of 2.7 — significantly higher than the base FSI of 1.7 elsewhere in NAINA. NAINA originally covered 270+ villages; the active core today is approximately 94 villages across 12 Town Planning Schemes. Atal Setu (Mumbai Trans Harbour Link), the Navi Mumbai International Airport (commissioning 2025-26), and the Multi-Modal Corridor are driving substantial land value appreciation. Outside NAINA in the Greenfield Belt (Karjat, Khopoli, Pen, Alibaug direction, Wada, Bhiwandi outer, Shahpur, Murbad), traditional JD applies: villa share 45-55%, plotted share 55-65%

51% of total eligible tenants under DCPR 2034, reduced from the 70% threshold that applied under the earlier DCR 1991 regime. This consent reduction was introduced to expedite urban renewal of approximately 16,000+ cessed buildings in the Island City — buildings constructed before 30 September 1969, which pay a repair cess to MHADA. The lower consent threshold applies to cessed buildings under Section 33(7), MHADA layouts under Section 33(5), and slum redevelopment under Section 33(10). For non-cessed authorised housing society redevelopment under Section 33(7B), the consent threshold is also 51% per the Maharashtra Cooperative Societies Act framework. Joint redevelopment of multiple adjacent plots unlocks higher incentive FSI: +50% for single-plot 33(7), +60% for 2-5 plot cluster, +70% for 6+ plot composite redevelopment under 33(7), and rises further under 33(9) cluster redevelopment for 4,000+ sqm City schemes.

DCPR 2034 (Development Control and Promotion Regulations for Greater Mumbai 2034, sanctioned under MRTP Act 1966 Section 31(1) and notified November 2018) is the primary planning framework for MCGM (BMC) area. Section 33 governs additional FSI for redevelopment, with key sub-sections: 33(5) MHADA layouts — 4,000+ sqm, 18+ m road, FSI up to 4.0, existing carpet + 35%; 33(7) cessed buildings in Island City — single plot, 9+ m road, FSI 3.0 or rehab + 50% incentive (60% for 2-5 plot cluster with 8% extra carpet, 70% for 6+ plot cluster with 15% extra carpet); 33(9) cessed cluster redevelopment — 4,000+ sqm City, 13.5+ m road, FSI up to 4.0+, +60-70% incentive; 33(7B) non-cessed authorised society redevelopment — any size, 9+ m road, base FSI + 15% BUA, +10 sqm per member or 15% BUA; 33(10) SRA slum schemes — slum land, variable road, FSI up to 4.0+, free 300 sqft minimum per rehab family. All schemes can stack with Fungible FSI (35% additional saleable area on premium payment) and loaded TDR (subject to road width ≥9 m for TDR loading).

Plotted development is not viable in the Island City Redevelopment Zone or the Suburban Redevelopment Zone — there is almost no greenfield land left, plot values are too high, and MCGM zoning favours vertical redevelopment under DCPR 2034. Plotted JD deals happen primarily in the Greenfield Belt (Karjat, Khopoli, Khalapur, Pen, Alibaug direction, Wada, Bhiwandi outer, Shahpur, Murbad, Asangaon, Titwala outer) and NAINA, where share is 55-65% for plotted. The Extended Suburbs and MMR Periphery (Thane, Mira-Bhayandar, Vasai-Virar, Kalyan-Dombivli, Panvel, Kharghar, Taloja, Nerul, Vashi) primarily support high-rise and mid-rise apartment JD with 30-50% landowner share. Large-format Integrated Township Projects (ITP) and Luxury Villa Estates (often 10-30 acres) are emerging in Shahpur, Murbad, and Karjat under the state's ITP norms with special FSI concessions.

For traditional Joint Development in the Extended Suburbs and Greenfield Belt: Section 45(5A) of the Income Tax Act (inserted by Finance Act 2017, effective 1 April 2018) gives individuals and HUFs a key relief — capital gains on a registered JD agreement are deferred to the year in which the Completion Certificate is issued. LTCG on land and building is currently taxed at 12.5% without indexation (post Budget 2024, for transfers on or after 23 July 2024); pre-23 July 2024 acquisitions can opt for 12.5% without indexation or 20% with indexation. TDS at 10% under Section 194-IC applies to any cash consideration. The provision applies only to individuals and HUFs. For redevelopment under Section 33 of DCPR 2034: the rehab area received by a society member in lieu of the old flat is generally not treated as a transfer for capital gains purposes (per multiple ITAT rulings) — only the additional purchased area or cash consideration triggers tax. The corpus fund received from the developer is generally treated as a capital receipt, not income. Consult a tax advisor for your specific situation — Mumbai redevelopment tax treatment is fact-specific.

For a Development Agreement (DA) or Joint Development Agreement (JDA) in Mumbai: post the Bombay High Court's Sandeep Dwellers (2022) and Suhas Damodar Sathe (2025 SCC OnLine Bom 576) rulings, agreements granting transfer and assignment rights to developers are treated as conveyance under Article 25(b) of the Maharashtra Stamp Act 1958. In Mumbai municipal area: 5% stamp duty + 1% metro cess = 6% effective conveyance rate on the market value of the developer's share, plus 1% registration fee (capped at Rs. 30,000 for properties above Rs. 30 lakh). Women buyers get a 1% concession on stamp duty (4% + 1% metro cess = 5% effective). For the Permanent Alternate Accommodation Agreement (PAAA) — the tripartite agreement between developer, society, and individual rehab member — the Bombay HC ruled in Adityaraj Builders (February 2023) and the IGR issued a circular (26 July 2023) confirming that once the DA is stamped, the PAAA attracts only Rs. 100 nominal stamp duty under Section 4(1) of the Maharashtra Stamp Act. Additional purchased area beyond the rehab entitlement is stamped at full conveyance rates. Verify with a local lawyer; Maharashtra stamp duty law on redevelopment is highly nuanced and frequently litigated.

The zone-wise ratio ranges and redevelopment regime parameters are reviewed every quarter using recent transaction data from 1acre's 1,000+ agent network across Maharashtra, cross-referenced with DCPR 2034 amendments, IGR circulars, MHADA notifications, and CIDCO NAINA Town Planning Scheme progress.