A renovation that has stood without complaint for years can still become a problem the moment you try to sell. HDB's renovation rules do not expire simply because time has passed, and a resale transaction is exactly when unresolved works tend to surface.
Why this matters at resale
Every HDB flat's renovation history is, in principle, checkable, and unauthorised works can be flagged as part of the requisition process your buyer's lawyer runs before completion. An unresolved issue found late can delay completion, or in a more serious case, hold up the transaction entirely while it gets sorted out, exactly when you can least afford the delay.
What kind of works trigger the issue
According to HDB's renovation rules, many works require a permit obtained before the work starts, and certain works, most importantly anything tampering with a structural element such as hacking a structural wall or column, are simply not allowed at all. Works carried out without the required permit, or works that fall into the not allowed category regardless of permit, are both the kind of history that needs to be addressed before you sell.
Regularise or reinstate, the two paths
Where a past renovation can be retroactively assessed and approved by HDB, regularising it is usually the more practical route. Where it cannot be approved, for example because it involved structural work that is never permitted, reinstating the flat to its original, approved condition is typically required. Which path applies depends on the specific works involved, so this is worth checking directly with HDB or your renovation contractor well before you plan to list.
How this shows up in the completion timeline
Title and requisition issues, which can include unauthorised renovation works, are one of the recurring reasons a resale completion runs late, alongside a CPF shortfall, slow return of loan documents, and a valuation gap. These issues are meant to surface early in the process, but an unresolved renovation history that the seller was not tracking can still turn up closer to completion than anyone would like.
How to check before you list
Before you list your flat, pull together whatever records you have of past renovation works and any permits obtained, and if you are uncertain, ask HDB directly or have your conveyancing lawyer check as part of preparing for sale. Sorting this out before you list, rather than reacting to it once a buyer's lawyer raises it, keeps your sale on schedule.
Frequently asked questions
How do I find out if my past renovation was ever approved?
Check your own records for the original HDB renovation permit, and if you cannot locate it, ask HDB directly or have your conveyancing lawyer check as part of the pre sale search. Do not assume a renovation was compliant just because it was done years ago without issue.
Can unresolved renovation issues actually delay my completion date?
Yes. Title and requisition issues, which can include unauthorised renovation works, are one of the recurring reasons a resale completion runs late. Raising and resolving them early, ideally before you list, avoids a scramble close to your completion date.
Not sure your renovation history is clean?
Winfred flags this early in the listing process, before it becomes a requisition surprise close to completion.
Book a free 30 minute callWinfred Quek is an Associate Marketing Consultant at Crestbrick Pte Ltd (CEA Licence No. L31010886H). CEA R073319H. This page is for general information only and does not constitute financial, investment, or legal advice. Rates and rules reflect the position as at 9 Aug 2026; verify current figures with IRAS, HDB, or MAS before making any decision.