HDB's review of the Jumbo Flat conversion scheme should end with a firmer resale rule, not a looser one. The scheme lets families combine two adjacent three-room or smaller flats into one larger home after HDB's structural approval, and it has done so since 1993. It was never meant to manufacture a scarce asset class that trades at a six-figure premium over comparable resale flats. A 1,465 sq ft converted flat in Telok Blangah, listed at S$2.18 million and then cut to roughly S$2 million, is the clearest signal yet that the resale tail is wagging the policy dog. The review now under way should tighten the resale side of the scheme: longer minimum occupation periods for converted flats, resale channels that keep them within reach of the households the scheme was built for, and published data so buyers can see what a jumbo is actually worth.
What the listing actually shows
Start with what the listing is and is not. It is not a sale. No resale application has been filed for the unit, so no transaction has been registered and no valuation has been tested in the market. What exists is an asking price — S$2.18 million at first, later revised to about S$2 million on PropertyGuru — and reporting that places it more than 40 per cent, or roughly S$600,000, above comparable flats.
An asking price is an opinion. In a thin market, opinions can be expensive and still never clear. But that is precisely the problem. When one listing sets a reference point, it shifts what the next seller believes their flat is worth, and what the next buyer fears missing out on. A number that no one has paid can move the expectations of everyone who has not sold.
Why the scheme invites this
Converted flats carry two things at once. The first is a concession: the right to merge adjacent units is not something a household can buy on the open market, and it depends on HDB's approval of the building's structure. The second is scarcity, because no meaningful new supply of jumbos is being created to match resale demand. Put together, a policy permission and a thin market become a pricing story.
The occupation rules that apply to a converted flat are broadly the same as those for an ordinary resale flat. That mismatch is the heart of the matter. If the scheme's advantage can be capitalised into a resale price and realised within a few years, then part of a public concession is funding private gain. The "jumbo" label itself is closer to a marketing category than a housing class, and listings lean on it heavily.
The objection worth taking seriously
The obvious counter-argument deserves a straight answer. The jumbo segment is small, the critics will say, so one ambitious listing should not drive national policy. Tightening could also punish families who merged units in good faith, spent real money on renovation, and eventually must sell — because of death, divorce, or a job move. A converted flat is still somebody's home, and an owner who has held it for two decades should not be trapped in it.
That is fair. But "do not trap owners" is not the same as "let the market price the concession". The fix is not to abolish conversion, which remains a sensible way to house three generations under one roof. The fix is to lengthen the holding period and to channel resale toward buyers with the same need the scheme was created to serve.
What HDB should do, specifically
Three steps would do most of the work. First, extend the minimum occupation period for converted flats well beyond the standard term, so the concession cannot be converted into a quick trading gain. Second, restrict resale of converted flats to eligible households, or apply a levy that recovers part of the windfall when they are sold on the open market. Third, publish the numbers: conversions approved each year, typical transacted prices, and the gap between asking and closing prices, so that the market negotiates with evidence rather than with the loudest listing.
Agents and sellers are not the villains here; they are responding to a rule set. If the rule set rewards a premium that reflects permission rather than liveability, that is a policy choice HDB can change. The public should also stop reading an asking price as a valuation — the Telok Blangah flat may never transact anywhere near S$2 million, and the parties involved have not even begun the resale process.
The review is the right moment. A scheme that has quietly served families since 1993 should be judged by what it does for housing need, not by what a single listing says it might fetch. If conversion perks can be flipped for speculative gain, the perks are too generous and the resale conditions are too thin. Tighten them, and the scheme can keep doing the job it was built for.