Central Trio @ AMK BTO Review: Ang Mo Kio's First Plus Flats, With October 2024's Joint-Lowest Plus Clawback and Its Longest Wait

Of Ang Mo Kio's four Plus BTO launches from October 2024 to June 2026, Central Trio asks the least at both ends of the money, the 4-room price at booking and the share HDB keeps at the first sale, and the most in months before the keys.

What the money bought is a new 99-year flat in one of three blocks of 19 to 21 storeys on Ang Mo Kio Central 3, in a project of 422 flats of only two types: 2-room Flexi flats of 38 or 48 sqm, and 4-room flats of 89 sqm. HDB priced the 4-room at $481,000 to $603,000 before grants, below every 4-room range the town's later Plus projects carried: Oak Ville @ AMK's $514,000 to $650,000 in October 2025, and Kebun Baru Ridge's and Kebun Baru Breeze's ranges in June 2026, which started at $543,000 and $547,000. HDB set the subsidy recovery at 6%, where Oak Ville carries 7% and both Kebun Baru projects 8%.

What it costs beyond the price is time, twice over. HDB's estimate is 59 months from flat selection, four years and eleven months, the longest of any project in the October 2024 BTO exercise. Then the Plus terms start: ten years in the flat before it may be sold, counted from key collection; no letting of the whole flat, ever; and 6% of the first sale's price or valuation, whichever is higher, to HDB. Add HDB's 59-month estimate (a median across the blocks, to projected completion) to a ten-year MOP that starts only at key collection, and roughly fifteen years separate choosing a Central Trio flat from the first day it could be sold.

Our recommendation, as of September 2026, with the application window (16 to 23 October 2024) long closed and flat booking, on HDB's usual timetable, long over:

• If you booked a Central Trio flat, keep it if your household still expects to be living in it ten years after the keys (the test is in the callout below). If life has changed, weigh the exit honestly: walking away before the Agreement for Lease costs the option fee ($500 for a 2-room Flexi, $2,000 for a 4-room), and walking away after it costs 5% of the price in place of that fee, not on top. Both routes end in a one-year bar on applying again. The stages and payments are in the BTO process, step by step.
• If yours is a 2-room Flexi, treat it as a home you will occupy yourself. Under HDB's rules a Plus 2-room Flexi can never be let, whole or by the room.
• If you may one day buy a Central Trio flat on resale, the Plus rules come with it: an income ceiling even without a grant, a ten-year MOP of your own and no whole-flat letting. The 6% falls on the first owner's sale.
• If you missed it and still want Ang Mo Kio, HDB's preliminary November 2026 list has no flats in the town; resale is the route you can act on today.
• Look past Central Trio if you needed keys within about three years, or if a sale, a posting abroad or letting the whole flat within a decade of the keys is a real possibility. A Standard flat opens those doors once its five-year MOP is met.

Everything here comes from HDB's documents and our analysis of HDB's resale records. It is not financial advice; check every figure and rule with HDB before you act.

Sources: HDB's October 2024 launch release and its price annex (Annex B for this exercise), and the Central Trio @ AMK sales brochure.

Why "first Plus flats" is a precise claim. The Plus label began with the October 2024 exercise (older flats are either unclassified or, for Prime Location Public Housing flats sold before it, Prime), and Central Trio was the only Ang Mo Kio project in that BTO exercise. So these 422 flats were the first HDB offered in the town under the Plus label. It is a statement about the framework's start, not about anything older in the town.

The one figure this review cannot give you: the queue. HDB's page of application rates for October 2024 is no longer online, and the Internet Archive holds no copy of its figures. So we print no rates for Central Trio, and we do not estimate its demand from anything else, later launches included.

What HDB's brochure says the project is. "Situated along Ang Mo Kio Central 3, Central Trio @ AMK comprises 3 residential blocks ranging from 19 to 21 storeys." Inside the boundary, HDB promises "a beautifully landscaped linear green, flanked by residential blocks on both sides", children's playgrounds and fitness zones, more fitness stations "at the roof garden atop the Multi-Storey Car Park (MSCP) and the wellness deck above the precinct pavilion", and a preschool "provided within the project". HDB adds that the project's facilities "will be accessible by the public".

How HDB says residents will travel. "Residents can commute using bus services located along Ang Mo Kio Avenue 6, which has buses to Yio Chu Kang and Ang Mo Kio MRT stations." HDB frames both stations as a bus ride; it gives no walking times, and we claim none.

The land around the fence, read on the rendered site plan. The text of HDB's brochure misses the site plan, so we read the page itself:

• West: the boundary road is labelled "Ang Mo Kio Avenue 6 / North-South Corridor (U/C)", under construction, with a "possible future bus bay & shelter" marked on it. The multi-storey car park takes that end of the site, and the plan's legend places the preschool on a first storey there, beside a "space reserved for future community use". The three residential blocks stand east of the car park. Across the avenue the plan shows Ang Mo Kio Town Garden West and a plot marked "Utility (U/C)", under construction.
• North: a "site reserved for future high-rise residential development".
• South: a strip "reserved for open space" along the boundary; beyond it, across the road and west of Ang Mo Kio Central 2, a "reserve site for future high-rise development", noted as the existing Ang Mo Kio Public Library.
• South-east: across Ang Mo Kio Central 3, public housing "inclusive of rental", under construction, which a linkway from the project reaches.
• East: a development the plan labels "Grandeur 8".

HDB states that everything shown around the site is subject to change and planning approval. The brochure carries HDB's general notice that projects may sit near roads and other land uses that bring noise, but no note specific to Central Trio. If a quiet western outlook or an open northern view matters to you, the plan already marks a corridor under construction on one side and land for future high-rise housing on the other.

Which flats are where. The site plan's unit table puts all 40 of the smaller (Type 1) 2-room Flexi flats in Block 734A, the biggest of the three blocks and the one that steps between 19 and 21 storeys. The larger (Type 2) 2-room Flexi flats and the 4-rooms are spread across all three blocks.

Subsidy recovery is the Plus and Prime price of admission that arrives last: when the flat is first sold, HDB takes a percentage it fixed at launch. HDB's October 2024 release set it project by project. The six Standard projects carry none; the rest, with HDB's waiting-time estimates beside them:

Source: HDB's October 2024 launch release (Table 2) and its price annex.

HDB gave reasons for two of the differences. Of the Bedok pair at 7%, HDB said Bayshore Vista and Bayshore Palms "are more favourably located near East Coast Park and a proposed sports and recreation facility"; of Merpati Alcove at 8%, that it "is right at the doorstep of Mattar MRT station and closer to the city centre". The release gives no such sentence for Central Trio's 6%, and we do not supply one.

The 6% and the 59 months are separate numbers. It is tempting to read the long wait as the reason for the light clawback. The table does not support that: Kembangan Wave carries the same 6% on a 41-month estimate, 18 months shorter. HDB publishes both figures and links neither to the other.

Against Ang Mo Kio's later Plus BTO launches. Oak Ville @ AMK (October 2025) carries 7%, and Kebun Baru Ridge and Kebun Baru Breeze (June 2026) 8% each. Across every Plus BTO project HDB launched from October 2024 to June 2026, 6% is the floor, shared with Kembangan Wave, Kim Keat Crest and Tampines Nova. Per $100,000 of the first sale's price or valuation, whichever is higher, the percentages come to:

• Central Trio: $6,000 (or $60,000 per $1,000,000).
• Oak Ville @ AMK: $7,000.
• Kebun Baru Ridge and Kebun Baru Breeze: $8,000.
• Crawford Heights, October 2024's Prime project: $9,000.

How the 6% is worked out. Three rules decide the bill, and none of them is the price you booked at:

• The base is the higher of two numbers: the resale price or the valuation. Selling below valuation does not shrink it.
• It is due at the first sale, whenever that is. Owning the flat for twenty years instead of ten changes when HDB is paid, not whether.
• It scales with the market of the day you sell. We forecast no sale price for Central Trio; the per-$100,000 figures let you apply the percentage to any number.

How the three classifications differ in subsidy, and why Plus sits between Standard and Prime, is set out in our guide to BTO flat types, sizes and prices.

Central Trio's 6% is the lightest Plus clawback of any Ang Mo Kio BTO launch so far; it lowers a bill that falls due only when the flat is first sold.

Yes, on HDB's own figures. The price annex puts Central Trio at 59 months, four years and eleven months. HDB counts from the median month in which buyers pick their flats to the median month in which the project's blocks are projected to be done. October 2024's estimates ran from 24 months at West BrickVille @ Bukit Batok to Central Trio's 59, and the next-longest were Taman Jurong Skyline (52) and the exercise's only Prime project, Crawford Heights (50). The nearest Plus project, Towner Breeze, was put at 48.

HDB's Shorter Waiting Time line is under 36 months. In HDB's words, "the 2,085 flats at Fernvale Oasis, Fernvale Sails and West BrickVille @ Bukit Batok are Shorter Waiting Time (SWT) flats with waiting time of less than 3 years", and Costa Riviera I & II "will have a waiting time of slightly over 3 years". Central Trio was never near that group.

Beside Ang Mo Kio's three later Plus BTO launches. Every one of them came with a shorter estimate, and every one with a higher clawback and a dearer 4-room:

Source: HDB's price annexes and launch releases for October 2024, October 2025 and June 2026. These launches all came after Central Trio's window closed; they are here for comparison, not as anything its applicants could have weighed.

What the 59 months measure, and what they do not. They are HDB's estimate at launch, not a date. HDB publishes no completion date for Central Trio, and adding the months to October 2024 would be our guess: the count starts at flat selection, which came months after the application window, and it is a median across the blocks. HDB gives no reason for the length of this estimate, and we offer none. MyHDB Page shows owners how their own block is progressing and gives its Probable Completion Date; how HDB builds these estimates is in our guide to BTO construction progress and wait times.

Facilities can trail the blocks. HDB's brochure notes that the blocks may be finished before the precinct's shared facilities, so that owners can collect their keys sooner. At Central Trio that could mean the preschool, the car-park roof garden or the wellness deck opening after you move in.

Only after the keys does the decade start. A Plus flat's MOP runs from key collection, so none of the 59 months counts towards it. The two sit end to end: HDB's estimate first, then ten years of living in the flat.

HDB's indicative prices for Central Trio, on 99-year leases and before grants:

Source: HDB's October 2024 price annex. HDB's prices leave out grants, any resale levy and any extra payments, and each unit is priced on its own. Per sqm is our arithmetic: each range's midpoint divided by the area with the air-con ledge.

A project of two flat types. With no 3-room, a household choosing Central Trio picked between a flat for one or two and a family flat, and most of the 422 flats are 4-rooms. That matters more under Plus rules than under Standard ones: selling to trade up is shut for ten years after the keys, so the size you chose has to last.

The 4-room against October 2024's other Plus projects. Central Trio's $481,000 start was the October 2024 BTO exercise's second-lowest Plus 4-room start, above only Kembangan Wave's $453,000, and its $603,000 top was the second-lowest Plus 4-room top, again after Kembangan Wave's $592,000. The Bayshore pair started at $495,000 and $514,000; Merpati Alcove, Kallang View and Towner Breeze at $530,000, $539,000 and $522,000; the Prime Crawford Heights at $568,000. One Standard project matched Central Trio's 4-room starting price exactly: Costa Riviera I & II in Pasir Ris, also from $481,000, with a 5-year MOP and no clawback.

Bare floors, like most of the exercise. Central Trio's price covers tiled floors and walls in the kitchen and bathroom areas, a tiled household-shelter floor (and, in the 4-room, a tiled service yard) and a water closet suite; the 2-room Flexi adds a sliding partition for the bedroom and a folding bathroom door. The brochure's specifications mark the rest as optional: vinyl flooring in the living, dining and bedrooms, the 4-room's bedroom and bathroom doors, and the wash basin and shower set. Take them through HDB's Optional Component Scheme, whose cost "will be added to the price of the flat", or fit them yourself after the keys. Three Standard projects that October, West BrickVille @ Bukit Batok, Fernvale Oasis and Fernvale Sails, included those items in their prices; HDB printed no without-finishes prices that year, so their prices simply include more, and we make no dollar adjustment. What HDB lets you change is in our guide to BTO renovation and design within HDB's rules.

HDB's after-grant starting prices, from its Ang Mo Kio Plus row. HDB's release prints one row per town and classification; Central Trio was Ang Mo Kio's only Plus project that month, so the row is its own:

HDB labels these after-grant figures illustrative: the grant a household gets turns on its own income and eligibility. The $120,000 was new: HDB's release noted the Enhanced CPF Housing Grant had been raised, in an announcement on 20 August 2024, from a maximum of $80,000 to $120,000 for families and from $40,000 to $60,000 for singles.

Where HDB's income ladder put Central Trio. HDB's table of housing options for the exercise assumes typical prices and CPF servicing the loan "with little or no cash payment":

• At $4,000 a month (EHG $80,000): no Plus 4-room anywhere; HDB's list stopped at Standard flats.
• At $7,000 (EHG $30,000): "a 4-room Plus flat in Kembangan Wave and Central Trio @ AMK", the only two Plus 4-rooms HDB named at that income.
• At $9,000 (EHG $5,000): "most of the Standard, Plus and Prime flats".

Our illustration: the lowest price of each flat type, less a first-timer family's EHG.

Source: our arithmetic on HDB's EHG bands. The top EHG, $120,000, is for households on $1,500 a month or less, and nothing is paid above $9,000. Your HFE letter sets the grant you actually get.

The ceilings that applied. In October 2024 HDB tested households against $14,000 a month for families, $21,000 for extended families and $7,000 for a 99-year 2-room Flexi. Those limits have since gone up to $16,000, $24,000 and $8,000, but only for HFE letter applications made on or after 24 Aug 2026.

The monthly sums behind a 75% loan. From this exercise, HDB's loan limit fell to 75% of the price. On our arithmetic with HDB's loan rules (a 75% loan over 25 years, assessed at HDB's 3.0% floor, the instalment capped at 30% of income):

Grants reduce the loan you need, and the rate actually charged is lower than the floor used here.

A $7,000 household reaches a Central Trio 4-room on HDB's own ladder, and the dearest 4-room is $603,000; the price is not what makes this project demanding.

Singles: a mature-town opening that began with this exercise. HDB's October 2024 release: "eligible first-timer singles will now be able to apply for new 2-room Flexi flats across all locations where such flats are available ... Previously, they were limited to applying for projects in non-mature estates." Ang Mo Kio is one of HDB's mature towns, so Central Trio's 2-room Flexi flats were among the first new flats in the town a first-timer single could apply for.

A single pays HDB's additional $15,000, incorporated into the price. On the cheapest Type 1 flat:

Source: our arithmetic on HDB's EHG (Singles) bands.

HDB's income ladder for singles stopped short of Central Trio. For singles earning $2,000 it named Standard 2-room Flexi flats at Taman Jurong Skyline and Fernvale Oasis; at $3,000 it added Fernvale Sails, West BrickVille @ Bukit Batok and one Plus 2-room Flexi, at Kembangan Wave. It did not name Central Trio at either income. A single's ceiling for a new 99-year 2-room Flexi was $7,000 a month at the time; it is $8,000 where the HFE letter application is made on or after 24 Aug 2026.

Seniors: the short-lease 2-room Flexi. Buyers aged 55 and above could take a 2-room Flexi on a lease of 15 to 45 years, as long as the lease lasts until each buyer and spouse is 95 or older. The short-lease flats come with grab bars.

Source: HDB's October 2024 price annex (leases of 20, 30 and 40 years sit between these).

Type 1 or Type 2. The smaller Type 1 flats, all 40 of them in Block 734A, are 38 sqm with the air-con ledge (36 sqm inside); Type 2 is 48 sqm (46 sqm inside), at $221,000 to $288,000 on a 99-year lease. Both come with a sliding partition for the bedroom and a folding bathroom door.

The rule that decides what a 2-room Flexi is for. A Plus flat can never be let whole, and HDB lets no 1-room or 2-room flat rent out a bedroom. Put together, a Central Trio 2-room Flexi can never be let at all, before or after the ten-year MOP. A 99-year one is a flat to live in and, after ten years, to sell with 6% to HDB.

The Plus terms at Central Trio, one by one, as HDB states them in September 2026:

• Selling: not before the 10-year minimum occupation period, counted from key collection. A Standard flat's MOP is 5 years.
• HDB's 6%: at the first sale, however long after the MOP, 6% of the resale price or valuation, whichever is higher: $6,000 on every $100,000. The obligation does not fade with time.
• Whole-flat tenancy: never, at any stage, and the ban binds every later owner. (A Standard flat can be let whole once the MOP is met, by an owner who is a Singapore Citizen, with HDB's approval, within occupancy caps and a non-citizen quota.)
• Renting out a spare bedroom: a 4-room owner may, with HDB's approval, without waiting for the MOP, and the owner may be a Singapore Citizen or a Singapore Permanent Resident. A 2-room Flexi may not let a bedroom at all.

If you buy a Central Trio flat on resale, years from now. None can be sold until its owners have served ten years after the keys, so this is a long way off. When it comes, the Plus label transfers with the flat:

• A ceiling on the buyer's income, even without a grant. For HFE letter applications from 24 Aug 2026, a household buying a resale Plus flat faces $16,000 a month for families ($24,000 for extended families) and $16,000 for singles aged 35 and above buying without the Singles Grant. An older unclassified flat or a Standard one, bought on resale with no grant, has no ceiling. HDB can change these figures long before any Central Trio flat is resold.
• Your own ten-year MOP. Buying a resale Plus flat starts a Plus MOP of your own; our guide to flats reaching their MOP explains how the count works.
• The letting ban. It binds you exactly as it bound the seller.

HDB's 6% is charged on the first sale, so it is the first owner's bill, not the resale buyer's.

The 6% stays with the flat until its first sale; the ten-year MOP and the letting ban apply to every Central Trio owner regardless.

HDB's own resale comparables for Central Trio (October 2024 price annex):

Source: HDB's October 2024 price annex; the gap is our arithmetic. For the 2-room Flexi, HDB gave no comparable, saying there was none nearby.

Reading HDB's list. HDB picked these flats itself, and itself warns that they differ from the new ones in ways a buyer should allow for. Three differences stand out. The comparables had roughly 87 years of lease to run, against a fresh 99. They span 87 to 94 sqm, around Central Trio's 89 sqm (86 sqm inside). And none of them is a Plus flat: they changed hands without a subsidy recovery and without the Plus ban on whole-flat letting. The gap measures HDB's pricing, not what a Central Trio flat will ever be worth, and we forecast no value for it.

Ang Mo Kio's resale market, July 2025 to June 2026. These sales came after Central Trio's window closed, so they describe the market owners-to-be are waiting in, not anything applicants saw:

Source: PropKaki's count of HDB's Ang Mo Kio resale registrations.

Street 23 is most of the young 4-room median. Of the 72 Ang Mo Kio 4-rooms with leases from 2015 that resold in the year, 39 were on Ang Mo Kio Street 23. Read $1,026,500 as the price of one cluster of young flats, not of Ang Mo Kio's young flats in general, and still less of this project.

The all-ages 4-room median sits above Central Trio's whole 4-room range. The median Ang Mo Kio 4-room of any age resold for $610,944, a little above Central Trio's dearest 4-room at $603,000. Most of those resales are flats whose leases began before 2015, so a new Central Trio 4-room and an older 4-room in the town cost similar sums for very different things: a fresh lease with a long wait and Plus terms, against a shorter lease you can move into now under the rules for older, unclassified flats.

The 2-room market is thin. Only 16 2-rooms of any age resold in Ang Mo Kio in the year, at a median $340,000, and none with a lease from 2015, so there is no young 2-room benchmark for Central Trio's 2-room Flexi flats at all.

A new BTO flat. HDB's next exercise, in November 2026, is to offer about 7,960 flats across six towns, and on the preliminary list, read on 19 Sep 2026, Ang Mo Kio is not one of them; HDB names no projects or classifications before a launch. Ang Mo Kio's three Plus launches after Central Trio, Oak Ville @ AMK in October 2025 and the two Kebun Baru projects in June 2026, have all closed. The calendar is in our BTO launch schedule.

Extra ballot chances belong to Standard flats. Under the ballot rules HDB states today, a first-timer family that has failed in two or more BTO applications for Standard flats gains one more chance on each later application for a Standard flat, up to a cap of five or four chances in all, depending on its category. Those chances are earned on Standard applications and spent on Standard applications, so a run of Plus applications in Ang Mo Kio builds none. How the ballot works is covered in our guide to BTO application rates and results.

If HDB runs another SBF. A Sale of Balance Flats exercise sells flats left over from earlier BTO launches. The most recent, in February 2026, offered 4,320 flats, and as at 18 September 2026 HDB had announced no further SBF. Which projects' flats a future SBF offers, in Ang Mo Kio or anywhere else, is for HDB to say, and we do not read any SBF list as evidence of how October 2024's queues went. How the SBF works is in our SBF guide.

Resale, open today. From July 2025 to June 2026 an Ang Mo Kio 4-room of any age resold at a median $610,944 and one with a lease from 2015 at $1,026,500, mostly on Ang Mo Kio Street 23; a 3-room at $434,000 and $718,000 (the full table is above). Those are older, unclassified flats: bought without a grant, they carry no income ceiling, and once your own five-year MOP is served they can be sold, or let whole with HDB's approval if you are a Singapore Citizen. The trade runs the other way on lease: you pay today's price for a flat already some years into its lease.

If Ang Mo Kio is the point and ten locked years never were the obstacle, watch HDB's lists for the town's next BTO; if they were, an older resale flat in Ang Mo Kio keeps selling, and whole-flat letting for a citizen owner, open after five years.

Where Central Trio's figures come from. HDB's October 2024 launch release: the framework's first exercise and the singles' rule, the EHG increase, the 75% loan limit, the Shorter Waiting Time wording, the subsidy recovery table and HDB's reasons for the Bedok and Merpati rates, the after-grant starting prices and the income ladder. Its price annex (Annex B for this exercise): flat types, floor areas, flat counts, prices, the 59-month estimate, the short-lease prices and HDB's resale comparables, for Central Trio and the exercise's other projects. The Central Trio @ AMK sales brochure: the setting, facilities, transport and finishes, with its site plan and unit table read on the rendered PDF pages, not the text extraction. HDB's releases and price annexes for October 2025 and June 2026: the prices, waits and subsidy recovery of Oak Ville @ AMK and the two Kebun Baru projects. PropKaki's property_rules records, each sourced to an HDB page: grants, income ceilings, the MOP, letting and ballot chances. HDB's own pages on flat booking: option fees and cancellation. Our live guides on flats reaching their MOP and on BTO construction: the MOP running from key collection, and MyHDB Page's progress tracking. And PropKaki's analysis of HDB resale registrations for Ang Mo Kio, July 2025 to June 2026.

Figures we calculated ourselves. The price per square metre (range midpoint over the floor area including the air-con ledge), the gap between the midpoints of the new-flat and comparable ranges, the subsidy recovery per $100,000 and per $1,000,000, the after-grant prices on HDB's EHG bands, and the loan and income table.

Where this review stops short, and why. No completion date or year: HDB published none, and adding the waiting time to the launch would be our inference. No resale price, rent or forecast for Central Trio, which is unbuilt and has never been sold; HDB's comparables and the town figures describe other flats. No application rate and no estimate of demand for October 2024, for the reason given with the particulars; later exercises' rates are never used to guess this one's. No reason for the 6% or the 59 months beyond what HDB wrote. No distances or walking times. Grant figures, HDB's and ours, are illustrations; your HFE letter decides your grant and loan. The rules for owners and resale buyers are HDB's as at September 2026 and can change. This is a desktop analysis of HDB's documents and data, not a site or showflat visit, and it is not financial advice: verify every figure and rule with HDB before you act.