Renovating an Older Mumbai Flat: What to Check and What Needs Approval
What to inspect before you plan, and who has to approve what.
The work starts with what is already behind the walls.
The pictures in this article are AI-generated concept illustrations. None shows a completed Team Design project.
The tiles are lifted, and under them is a damp patch nobody knew about. The mason says the pipe has probably been leaking for years. The new floor you ordered cannot go down yet.
Older flats in Mumbai hold surprises like this, and they also come with paperwork that newer buildings may not have. This guide covers what to inspect first, which permissions may apply, and who usually does what. It is general guidance: your society's own bye-laws and your building's status decide the rest.
Three priority inspection areas
These are the areas to examine before you design around anything. They are not a ranking of what we find most often. Published renovation guidance names waterproofing, wiring replacement and hidden structural defects as recurring concerns in Mumbai. [1]
1. Leakage and failed waterproofing. Find the source before you replace finishes. A bathroom pipe, a neighbour's flat and a common building element each need a different fix, and sometimes a different person to pay for it.
2. Ageing electrical and plumbing. Find out what can stay and what must go before you close walls and floors. Opening a wall twice costs more than inspecting once.
3. Deteriorated structure or concealed damage. Cracked concrete and corroded reinforcement can appear once finishes come off. They need assessment by a structural engineer, not a coat of plaster.
Do you need permission?
From your society. The published Maharashtra model bye-laws for housing societies require prior written permission from the managing committee for additions or alterations. [2] Check the bye-laws your society actually adopted. The model document does not replace its own records.
From the municipality. BMC lists some work as "tenantable repairs" that does not need a municipal proposal: painting, plastering, changing floor tiles, and specified plumbing, sanitary and electrical repairs. Structural repairs need a regular proposal. [3] That list does not clear every interior renovation, so ask before you assume.
Society permission does not replace a municipal approval where one is required.
Who submits. Development-permission applications to BMC go through an appointed registered architect or licensed surveyor. [3] So when we say an approval is the owner's responsibility, we do not mean the owner prepares the technical submission personally.
Who does what
- Housing-society permission. The architect provides drawings and a description of the proposed work. The owner applies as the member, supplies documents, signs undertakings and arranges any deposit.
- Municipal permission, where needed. The architect assesses the route and, if included in the appointment, prepares and submits through the authorised professional. The owner provides ownership documents, authorisation, signatures and payments.
- Structural alterations or repairs. The architect coordinates a registered structural engineer and the required submissions. The owner authorises the appointment and funds the work.
- Heritage, MHADA, cessed-building or landlord requirements. The architect identifies restrictions and arranges specialist support if appointed. The owner supplies property or tenancy records and secures the consents.
Our process page says Team Design prepares the regulatory submission package, and lists obtaining statutory permissions under the client's role. [4] Whether a given appointment includes follow-up on the application is agreed in writing at the start.
Planning something like this? Talk to the studio.
South Mumbai: check heritage and cessed-building status early
Many older buildings in the island city are heritage-listed or cessed. MHADA publishes a separate repair NOC procedure for cessed buildings. [5] Do not assume every old flat follows the same route. Find out your building's status before you appoint anyone or price anything.
What to do first, in order
1. Find out whether your building is heritage-listed or cessed.
2. Read your society's own bye-laws for what it requires and from whom.
3. Have the leaks, wiring and structure looked at, and ask for the findings in writing.
4. Decide whether any of the work is structural.
5. Appoint your architect, and agree in writing who handles each application.
6. Price the work only after these are done.
Questions to ask before you begin
- Has anyone inspected the leaks, wiring and structure, and in writing?
- What does our society's own bye-law require, and from whom?
- Is any of the work structural, and so subject to a regular municipal proposal?
- Is the building heritage-listed or cessed?
- Who submits each application, who signs, who pays?
Sources
[1] Mumbai home renovation cost guide, AMS Civil Work
[2] Model bye-laws of housing cooperative societies, Maharashtra Co-operative Commissioner
[3] BMC development permission FAQ
[5] MHADA repair NOC procedure for cessed buildings
Last reviewed 8 October 2026. Rules and procedures change, so confirm with your society and the municipal office before you act.