What Mumbai's registration numbers say about the market you are entering

Every month, Mumbai's property market takes an involuntary census: every registered transaction, primary or resale, luxury or LIG, lands in the Inspector General of Registration's ledger, and the ledger does not do marketing. In a market drowning in sentiment, the registration series is the one turnover meter nobody can spin. This data story reads the current numbers, and teaches the reading itself.

The numbers on the table#

Two readings hide in the pair. Volumes at a 13-year high say the market is transacting briskly: Mumbai's buyers and sellers are finding each other at prevailing prices, which ANAROCK's top-7 series put about 8 percent above a year earlier. And duty growing slower than volumes (4 against 6 percent) hints the average registered ticket edged down: activity broadening below the luxury tier, more mid-market transactions in the mix, a texture city averages usually hide.

Note what this table is not. It is the state's record of money changing hands, and it says nothing about which projects those flats sat in, whether they were delivered on time or whether the promoter is still filing. That is a different register entirely, and the next section is about the gap between them.

Two different things are called a registration, and the gap is enormous#

Before the series can be read at all, one word has to be pulled apart, because it does two jobs in this market and nobody flags the switch.

An IGR registration is a transaction: one flat changing hands, stamp duty paid, the deed entered in the Inspector General of Registration's books. A MahaRERA registration is a project: a promoter entering a whole development on the regulator's register before a single flat may be sold. Both are called registrations, both are counted monthly, and the numbers are nothing like each other.

In the same city over the same first half of 2026, IGR recorded 80,221 transactions while MahaRERA recorded 440 new project registrations across Mumbai City and Mumbai Suburban. One counts flats moving; the other counts buildings arriving. A reader who carries a figure from one series into a sentence about the other is out by more than two orders of magnitude, and the sentence will still sound plausible.

The register's own Mumbai series#

That second number has its own shape, and it is not the shape of the first.

New projects entered the register 39 percent faster in H1 2026 than in H1 2025, against transactions up 6 percent. Supply is arriving at the register considerably faster than flats are changing hands. That is not a crash signal and should not be read as one, since 2022 was busier still, but it is the part of the picture the transaction series cannot show: the transaction count tells you how briskly today's stock is clearing, and the project count tells you how much is queuing up behind it. It also sharpens the choice a buyer makes next, because a launch wave widens launch discounts while leaving finished stock scarce: the new-launch against nearly-ready fork prices that trade-off from the same register, and finds only one active MMR registration in eight has cleared 80 percent construction.

The register also holds the stock itself. Across the two Mumbai districts, 3,270 of 7,556 published projects file the building-level unit table, and those declare 119,998 unsold units. Treat that as what promoters have declared rather than as the city's marketable inventory: fewer than half the projects file the table at all, the figure includes completed and lapsed registrations, and it counts non-residential units alongside flats.

An analogy: the market's pulse oximeter#

Portals measure asking prices, the market's blood pressure as self-reported at parties. Registrations measure completed transactions: the pulse, taken at the wrist, monthly. A market can talk any price it likes; it can only register what buyers actually paid stamp duty on. When the talk and the pulse diverge, asking prices climbing while registrations stall, believe the wrist.

How a buyer uses the series#

Timing context. A rising series means competition for good inventory: decisions like Neha's Mulund purchase (illustrative, as ever) compress, and discounts narrow. A falling series hands patient buyers the table. Neither tells you to buy; both tell you how to negotiate when you do.

The exit you are also buying. 80,000 half-yearly registrations is the depth of the pool you will one day sell into. Buyers weighing Mumbai against thinner markets are pricing liquidity they will not need for a decade, and should.

The distinction the series cannot make. Registrations aggregate resale and primary, sound projects and shaky ones. A record half-year included buyers registering agreements in projects whose filings were already flatlining. The series is the ocean's temperature; your project's record is whether your boat floats, and the second question is never answered by the first.

The stamp duty you will contribute. Rs 6,968 crore in six months is the collective receipt for the 6 percent toll every registration pays: budget yours from the same table the state reads.

Watching it yourself#

The IGR publishes the raw counts; Knight Frank's monthly Mumbai notes are the accessible read, and the discipline is one glance a month: volumes, duty, and the year-on-year direction of both. Pair the city pulse with lane-level truth, the micro-market method runs on the same public data philosophy, and with project-level verdicts from the filings. Developers reading the same two series from the supply side will want the MMR dashboard, which splits the region into its five districts and finds them far more alike on distress than on inventory depth.

The other series is free to walk yourself. The district pages for Mumbai Suburban and Mumbai City carry every registered project with its status, its promised completion date and its possession timeline by promised year, which is the supply side of the same market the transaction series measures from the other end.

The decisive layer is neither: it is the individual project, and that is what the Rs 499 buyer report reads for any covered Maharashtra project, the specific boat in whatever ocean the registration series describes. Sign up on ReraGenie.

The one-line summary#

Mumbai's wrist says brisk: a 13-year-high half-year of transactions, duty broadening below the luxury tier, and new projects entering the register faster still. Read both series monthly, never confuse one registration for the other, and let the project's own filings, not the city's pulse, decide where your name gets registered.

Methodology and sources#

• Transaction volumes, stamp duty and the 13-year comparison: Inspector General of Registration, Maharashtra data analysed by Knight Frank, reported June 2026. These count registered transactions in the BMC area, primary and resale together.
• MahaRERA project registrations, the unsold unit counts and the district totals: ReraGenie analysis of 55,913 published MahaRERA projects, as updated on 20 September 2026. Half-year counts take each project's filed registration date; unsold units are summed from the building-level unit table on the 3,270 Mumbai City and Mumbai Suburban projects that file one, of 7,556 published.
• The two series are NOT comparable and no figure here subtracts one from the other. One counts flats changing hands in a defined municipal area; the other counts projects entering a state regulator's register across two districts. They share a word and nothing else.
• MahaRERA files no price, no carpet area and no unit configuration, so nothing in this article derives a rate, a ticket size or a price trend from the register. Those come from IGR and from consultancy series.