Society redevelopment: the numbers every member should be able to check before signing

Redevelopment is the largest financial decision most housing-society members will ever make, and it usually arrives as a thick PDF, a spreadsheet forwarded on WhatsApp and a general body meeting where everyone asks about their own flat. This guide explains, in plain language, the numbers each member should be able to see for their own flat before signing anything — and how committees can share them without answering the same question two hundred times.

This is general information, not legal or tax advice. Rules, rates and concessions change; always confirm the figures for your project with your PMC, advocate and chartered accountant.

1. Your existing area — as certified

Everything starts from the area of your current flat as recorded in official documents, for MHADA colonies typically the MHADA-certified area. Members should be able to see the exact figure used and the document it comes from. Small differences matter: a few square feet here changes your eligibility and everything after it.

If your records (an Index II, agreement or share certificate) show a different figure, raise it early. Corrections are far easier before the area statement is finalised.

2. Eligibility — what you get without paying

Your eligibility is the new area the developer gives you free of cost, usually your existing area plus an agreed percentage or a minimum flat size set by policy. Members should see:

• the formula used (for example, existing area plus X%, or a minimum unit size), and
• the resulting square feet for their flat.

3. Selected area and the additional purchase

New buildings come in fixed flat sizes, so your eligibility rarely matches a unit exactly. Many members choose a larger unit and buy the additional area. Two terms cause most of the confusion:

• MOFA carpet area — the older definition used in many society documents.
• RERA carpet area — the definition under RERA, which includes some areas MOFA leaves out, so the RERA figure for the same space is usually a little higher.

A good statement shows the additional area in both forms, so members can compare it with the developer's offer and with the sale price of similar flats.

4. The consideration — how the price is worked out

The price for the additional area is the consideration. It is often charged in slabs: a lower rate for the first block of extra square feet and a higher rate beyond it. Members should be able to see each slab, the rate, and the square feet charged at that rate. Extra parking, if offered, is usually a separate line.

5. Taxes and charges on top

The consideration is not the final number. In Maharashtra, members typically also pay:

Showing these line by line, with the total payable, prevents the most common surprise in redevelopment: a member who agreed to "₹40 lakh for the extra area" discovering the real total is noticeably higher.

6. What the developer pays you

Redevelopment also involves money flowing to members while the new building goes up. Typical components:

• Hardship compensation or rent — a monthly amount per square foot, often rising each year.
• Brokerage and shifting — one-time amounts for moving out and back in.
• Corpus — a lump sum per member or per square foot.

Members should see a schedule: how much, from when to when, and the total expected by possession. It is the best answer to "can I afford rent outside while this is built?"

7. Your new flat

Finally, the details of what you are getting: the new wing and flat number (once allotted), the carpet area, and any parking spaces. These often change several times during allotment, so members should always see the current version, not last month's PDF.

Why spreadsheets and WhatsApp stop working

At ten flats, a spreadsheet works. At two hundred, committees run into the same problems:

• Every member wants their own row, not the whole sheet — and sharing the whole sheet exposes everyone's numbers.
• Corrections get lost. Members send changes on WhatsApp; the committee updates version 7 of the sheet while someone is still reading version 5.
• No record of who agreed to what. When disputes arise at agreement time, nobody can show when a member approved their figures.
• The same questions, every week. "Why is my eligibility lower than my neighbour's?" is easy to answer once it is written down per flat.

What a better process looks like

The fix is not more meetings. It is giving each member a private, always-current view of their own flat, a simple way to approve it or ask for a correction, and giving the committee one place to answer, update and keep a record.

That is what we built with Redevelopment Studio, our member app for redevelopment. Members log in with an OTP, see their area, eligibility, consideration, taxes and payment schedule, read society documents, and approve or raise a change request that becomes a conversation with the committee. The committee runs it all from a web panel with CSV import, allotments, WhatsApp and push notifications and printable reports. It is live with a Mumbai society where 358+ members use it to review their redevelopment details.

It is currently limited to pre-approved societies. If your society is starting or in the middle of redevelopment, talk to us about digitising your project.

A checklist for committees

Before the final area statement goes out, make sure every member can see, for their own flat:

1. Existing certified area and the document it comes from
2. Eligibility and the formula behind it
3. Selected unit and additional area in MOFA and RERA terms
4. Consideration by slab, plus parking
5. GST, stamp duty and registration, and the total payable
6. Rent, brokerage, shifting and corpus, with a schedule
7. The current new flat number, wing and parking

If all seven are clear, and each member's approval is recorded, you have removed most of the reasons redevelopment projects stall.