Most profitable resale HDB if bought in December 2023, compared with Waterway Terraces I 5-room flat bought at $670,000 facing the waterway on the 2nd floor.

For resale HDB flats bought in December 2023 and sold within such a short holding period, there is currently no clear “most profitable” resale HDB that can be meaningfully and reliably identified, and it is very unlikely any genuine resale HDB would have outperformed your Waterway Terraces I example in net profit terms over this time frame.

Here is why, in the specific context of your comparison:

- You are comparing a 5‑room HDB at Waterway Terraces I bought at 670,000, low floor but directly facing the waterway, which is a premium stack with strong intrinsic attributes (Punggol waterfront, integrated amenities, short remaining lease age, and strong family demand).
- From December 2023 to now, the market has not moved enough for a typical resale HDB to realise very large paper profits after buyer’s stamp duty, interest, and selling costs, especially if sold so soon.
- To beat your unit, another resale HDB bought in December 2023 would need all of the following at the same time:
- Very under‑market entry price (motivated seller or mispricing)
- Top‑tier attributes (corner, high floor, unblocked / greenery / water view, near MRT and amenities, younger lease)
- A subsequent resale at a significantly higher price, which is constrained today by HDB’s fair market valuation, buyer affordability and tighter financing conditions.

For practical benchmarking instead of chasing an absolute “most profitable” unit, you can:

- Treat your Waterway Terraces I 5‑room as a top‑quartile asset in Punggol HDB terms, due to its waterway view and reasonable quantum for a 5‑room.
- Use EdgeProp Singapore’s HDB research tools to:
- Track Punggol and Waterway Terraces I past resale transactions by block, stack, floor level and orientation.
- Compare your purchase price per square foot to recent resales for similar 5‑room stacks (waterway‑facing, low–mid floor) to estimate your current paper gain.
- Screen other estates (e.g. BTO clusters just entering MOP) to see which projects show the highest uplift from first resale to latest resale, but note these would generally be flats first bought many years ago, not in December 2023.

If you like, tell me your exact block, level range and remaining lease for Waterway Terraces I and your intended holding period, and I can help you assess:

- Rough current fair value range
- Likely upside over the next three to five years versus other Punggol / waterfront HDBs and comparable “profitable” estates.