Cluster redevelopment, explained

The problem cluster redevelopment solves

In dense areas of Mumbai — Byculla, parts of Girgaon, Bhendi Bazaar, the older parts of Dadar and Parel — the building stock is old, small-plot and tightly packed, with narrow access roads and no open space.

Redeveloping these plot by plot reproduces the problem at greater height. Each owner maximises their own small plot, the road stays narrow, no open space is created, setbacks are minimal, and the result is a denser version of the same conditions — frequently with worse light, worse ventilation and access too narrow for emergency vehicles.

Cluster redevelopment addresses this by treating a group of adjacent plots as one site. Roads can be widened, open space consolidated, services planned properly, and the whole cluster designed rather than accumulated.

Why it is commercially attractive

A consolidated site is worth more than the sum of its parts, for several reasons that compound.

A larger plot permits a better scheme: proper setbacks, efficient cores, parking that actually works, amenity that is usable. It allows the geometry to be optimised rather than constrained by an awkward small-plot boundary. It creates an internal environment that the surrounding area does not have, which — as Powai and large Kurla projects demonstrate — allows a project to price above the micro-market's apparent ceiling.

For existing residents, the same logic means a better outcome: larger units, real amenity, proper parking and an environment materially better than what plot-by-plot redevelopment would have delivered.

Why it is difficult

The difficulty is consent, and it scales badly. A single society redevelopment requires agreement from that society's members. A cluster requires agreement across multiple buildings, which may include cooperative societies, individually owned buildings, tenanted and cessed structures, commercial occupants and, frequently, occupants whose legal position is unclear.

Each of those groups has different interests, different entitlements and different leverage. A tenant in a cessed building has a different position from a flat owner in a cooperative society, and an agreement that satisfies one may be unacceptable to the other.

The result is that cluster schemes take considerably longer than single-plot redevelopments, cost more to assemble, and carry a genuine risk of stalling — sometimes after substantial investment.

• Consent across multiple buildings with different ownership structures
• Mixed cooperative, individually owned, tenanted and cessed occupancy
• Commercial occupants with different requirements from residents
• Occupants whose legal position requires establishing
• Transit accommodation for a much larger displaced group
• Phasing so the whole cluster is not displaced simultaneously
• A single holdout capable of stalling the entire scheme

What makes a cluster scheme work

The schemes that succeed generally share a few characteristics.

A developer or sponsor with genuine patience and capital, who has budgeted consent as a multi-year funded workstream rather than treating it as documentation to be collected. Phasing designed so that occupants can be moved in stages rather than all at once, which reduces both the transit burden and the consent resistance. Transit accommodation arranged in advance and of adequate quality, because the single largest driver of resistance is fear of displacement. And a communication approach that treats occupants as participants rather than as obstacles.

For a developer considering a cluster scheme, our advice is consistent: underwrite consent as the dominant risk, not construction or approvals. The projects that fail here fail on consent, and the ones that succeed generally did the consent work properly before committing capital to design and approvals.

For occupants considering a cluster proposal

Occupants approached about a cluster scheme should apply the same discipline as a society considering redevelopment, plus one additional question: what happens if the cluster does not come together.

A society that signs into a cluster scheme is accepting a dependency on other buildings agreeing. If a neighbouring building holds out, the scheme may not proceed, and the society may have spent years in a process that produces nothing — or find itself pressured into worse terms to save the scheme.

The protections are to establish what happens on a cluster failure, whether there is a fallback to a standalone redevelopment, what timeline triggers a right to withdraw, and whether costs incurred are reimbursed. These should be settled before signing rather than discovered when the scheme stalls.