Glossary · also called DLP, Defects liability period, Defects notification period, Maintenance period
What is the Defect Liability Period (DLP) in Construction?
Defect liability period: The defect liability period (DLP) is a fixed period after a construction project is completed — commonly 12 months, though contracts vary — during which the contractor must repair defects that appear, at its own cost. The balance of retention money or a performance security is usually released only when the period ends and defects are cleared.
Definition
Some defects only show up once a building is in use: a leaking terrace after the first monsoon, cracks in plaster, a sticking door. The defect liability period gives the client a contractual right to have these fixed by the contractor without further payment.
The contract sets the length of the period (often 12 months, sometimes 24 months or more for specialised work), when it starts (usually from the date of completion or handover), the notice process for reporting defects, and what happens if the contractor fails to respond. FIDIC-style contracts call it the defects notification period.
Note that the DLP is a contractual remedy period. It does not necessarily limit the contractor’s wider legal liability for defective work; take legal advice on specific cases.
How it works
An example, with illustrative terms only:
- Completion certified on 31 March 2026; DLP of 12 months, ending 31 March 2027.
- Total retention money held: ₹10 lakh. Half (₹5 lakh) released on completion.
- Two defects reported in August 2026 are rectified and accepted by the client’s engineer.
- At the end of the DLP, with no outstanding defects, the remaining ₹5 lakh is released and any performance bank guarantee is returned.
Common mistakes
- No diary date for the end of the DLP, so retention sits unclaimed with the client.
- Not recording defect notices and rectification, which makes release harder to argue.
- Mismatched subcontract terms. If your subcontractors’ DLP ends before yours, you may carry their defects alone.
- Confusing DLP with liquidated damages. LDs relate to late completion; the DLP relates to defects after completion.
In Zaptiz
Zaptiz Construction records the defect liability terms at contract award alongside retention, advances and LDs. The retention register tracks what is held per project and supports partial or full release, and snags can be assigned, resolved and verified with before-and-after photos.