Approvals are the least glamorous — and most skipped — part of building. Skipping them is also the fastest way to a stop-work notice or a demolition order. Here's what you actually need.
For a new build
| Approval | From | When |
|---|---|---|
| Building plan sanction | Local municipal body / development authority | Before construction |
| Commencement certificate | Municipal authority | Before starting work |
| Environmental / fire NOC | Relevant department (larger projects) | As applicable |
| Completion & occupancy certificate | Municipal authority | After completion |
For an apartment renovation
| Item | From | Notes |
|---|---|---|
| Society NOC | Your housing society | Almost always required |
| Work-hour rules | Society | Defined timings, no Sundays often |
| Structural sign-off | Structural engineer | For any wall/beam changes |
| Debris & lift deposit | Society | Refundable, common practice |
Documents to keep ready
- Ownership documents and sanctioned plan
- Architect's drawings and structural certificate
- Contractor details and work schedule
- ID proofs of workers (many societies require this)
Why it matters
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Frequently asked questions
What happens if I build without sanction?
The authority can issue stop-work or demolition notices, levy penalties, and refuse the occupancy certificate — which blocks utilities, loans and resale. Regularisation, where possible, costs far more than approval.
How long does building plan sanction take?
With complete documents, 30–90 days is typical depending on the city. Online single-window systems in metros have shortened this considerably.
Does a society NOC cost money?
Societies usually take a refundable deposit (₹10,000–50,000) against debris and damage, plus fixed charges for lift usage. Get the society's renovation rules in writing before starting.