The HDB Optional Component Scheme (OCS) lets you bolt three big-ticket renovation items onto your new BTO flat at the booking appointment: floor finishes, internal doors and sanitary fittings. Because the cost is folded into the flat price, you pay for it with CPF and your housing loan instead of cash. That single fact is why so many first-timers tick the box without thinking it through. OCS is genuinely cheaper than hiring an interior designer for the same items, but it is a take-it-or-leave-it package with fixed colours, you decide once and can never opt in later, and a growing share of newer projects can't offer it at all. This guide walks through what is covered, the actual prices by flat type, and a clear-eyed view of when it pays off.
OCS is an opt-in package offered by HDB at your flat booking appointment. Instead of receiving a bare unit and renovating everything yourself, you can have HDB's contractor install a defined set of finishes before you collect your keys. The components fall into three groups, and you generally choose them as packages rather than picking individual items.
The point of confusion for most buyers is that HDB already installs plenty of finishes for free, whether or not you take OCS. Floor finishes in the kitchen, household shelter, service yard and bathrooms come standard. So do the wall tiles in the kitchen and bathrooms, and a toilet bowl in each bathroom. OCS only adds the items that would otherwise leave you with bare cement screed or no fittings.
OCS is split into two packages: a flooring package, and a combined internal-doors-and-sanitary-fittings package. The figures below are HDB's reference prices and are a useful benchmark, but the exact amount on your booking form varies by project because material and labour costs differ between developments. Always check the price list handed to you at the booking appointment.
The numbers below were HDB's published reference rates as of April 2023; treat them as a 'from' guide and confirm the project-specific figure for your launch. Because the cost rides on the flat price, it draws down your CPF Ordinary Account and the loan you take, the same buckets you size up with the BTO affordability calculator before you commit.
| Package | 3-Room | 4-Room | 5-Room |
|---|---|---|---|
| Flooring (bedroom vinyl + living/dining porcelain tiles) | $3,340 | $4,970 | $6,060 |
| Internal doors + sanitary fittings | $2,770 | $3,180 | $3,180 |
| Both packages combined | $6,110 | $8,150 | $9,240 |
The case for OCS is mostly about price and cash flow. Buying the same flooring and fittings through a renovation contractor or interior designer (ID) usually costs more, because you pay for design markup, smaller-scale procurement and separate labour mobilisation. HDB buys these components in bulk across an entire block, so the per-unit cost drops.
Industry quotes for the equivalent items run noticeably higher than OCS. As a rough guide, IDs have been quoted around $7,000 for 3-room flooring, $10,000 for 4-room and $12,700 for 5-room, with doors-and-fittings adding several thousand more. Against OCS rates of a few thousand dollars per package, the saving on these specific items is real, though an ID gives you finishes you actually chose.
OCS is convenient, but it is rigid. You get HDB's standard colours and models, identical to every other unit in the block that opted in, with no swaps for a tile you prefer or a basin that matches your bathroom theme. Buyers who had a clear design vision often end up hacking out OCS finishes during renovation, which wastes the money entirely.
There are practical gripes too. Some owners report the actual vinyl shade differing from the website render, chrome fittings that water-stain easily, and porcelain pedestal basins that need removing to fit a vanity cabinet. And because the cost is rolled into your loan, you pay interest on it over the loan tenure rather than settling it once. If you're weighing how the loan side stacks up, the HDB loan vs bank loan comparison explains how that interest is calculated.
If you can't find OCS on your booking form, it isn't an oversight. HDB has been building more projects using Prefabricated Prefinished Volumetric Construction (PPVC), where entire room modules are made off-site with finishes already cast in. Those finishes are baked into the build, so HDB can't offer them as an optional add-on, and OCS is not available for PPVC blocks.
PPVC is now a meaningful slice of the BTO pipeline, so plenty of buyers in newer launches simply won't have the OCS option. For those flats you'll fit out flooring, doors and fittings yourself through your renovation. Budget for that early using the renovation cost calculator, since these items can swing a renovation quote by several thousand dollars.
OCS pays off if you're budget-conscious, relaxed about exact finishes, and want to spread the cost into CPF and your loan. If the standard vinyl-and-porcelain look is fine by you, you bank a real saving versus an ID and move in sooner. First-timers stretched on cash, in particular, benefit from shifting these items off the cash bill.
Skip it if you have a specific design in mind, or functional needs the standard package doesn't meet, such as non-slip flooring for young children or elderly parents. Paying for finishes you'll hack out is the worst outcome. Whichever way you lean, slot the OCS figure into your overall flat budget rather than treating it as a small extra, alongside the down payment, stamp duty and renovation lines in your HDB down payment plan.
No. You can only opt in for OCS at the flat booking appointment. HDB's contractor orders the components in bulk and may have installed them in other units, so there is no way to add OCS later. If you skip it, you fit out the items yourself during renovation.
Using HDB's reference rates from April 2023, the flooring package was around $3,340 for a 3-room, $4,970 for a 4-room and $6,060 for a 5-room flat, with doors-and-sanitary-fittings adding roughly $2,770 to $3,180. Exact prices vary by project, so check your booking price list.
Yes. Because the OCS cost is added to your flat purchase price, you can pay for it with your CPF Ordinary Account savings and your housing loan, rather than cash. The trade-off is that the amount is financed over the loan tenure, so you pay interest on it.
Your project is likely built using Prefabricated Prefinished Volumetric Construction (PPVC), where room modules arrive with finishes already cast in. HDB can't offer those finishes as optional add-ons, so OCS is not available for PPVC blocks. You'll handle flooring, doors and fittings through your own renovation instead.
This is general financial information for Singapore, not personal financial advice. Figures change — verify current rates against the official sources above before acting. See our full disclaimer.