Castle Green
Here is a question that stops most buyers cold: why would you pay S$2,200 psf for a brand-new District 26 condo when a 664-unit estate 800 metres away is trading at S$1,379 psf (as of 2026-Q2) with two MRT lines within a ten-minute walk? Castle Green — sitting on Yio Chu Kang Road since 1997 — is the kind of development that rewards buyers willing to look past newness. Five blocks, landscaped grounds large enough for two swimming pools, tennis and squash courts, and a minimart, all in a pocket that the Lentor cluster’s launch frenzy has finally put back on the map.
The gap between Castle Green’s resale PSF and the Lentor corridor’s new-launch PSF is the central tension of this review. At roughly 40 percent below the Lentor benchmark, the value proposition is real — but so are the trade-offs that keep the discount alive: a lease running from 1993 that leaves approximately 66 years on the clock, an aging façade, and the quiet reality that District 26 is still a commuter district rather than a lifestyle hub. What follows is an honest account of who Castle Green suits, who it does not, and what the numbers actually say.
Overview & Key Facts
Castle Green is a 664-unit privatised condominium along Yio Chu Kang Road in District 26 — a stretch of the Outside Central Region that has been quietly transformed by the arrival of the Thomson-East Coast Line. Developed by Castle Green Property Pte Ltd and completed in 1997, it sits on a 99-year lease commencing from 1993, leaving approximately 66 years on the clock as of 2026.
For most of its life, Castle Green was a quiet, unassuming large-format development in a suburban pocket known mainly for Yio Chu Kang MRT and the nearby Lentor forest. That changed dramatically from 2021 onwards, when the Government Land Sales programme released a string of sites along the new Lentor MRT station — spawning Lentor Modern, Lentor Hills Residences, Lentor Mansion, and others. Castle Green suddenly found itself at the centre of one of Singapore’s most active new-launch corridors.
With an average PSF of S$1,386 over the last 12 months against new Lentor launches transacting above S$2,100 psf, Castle Green presents a striking value gap. But the 66-year remaining lease is the elephant in the room — and understanding that trade-off is the key to evaluating this development honestly.
Location & Connectivity
Castle Green’s standout locational advantage is dual MRT access across two different lines. Yio Chu Kang MRT on the North-South Line is approximately 580 metres away — a comfortable 7–8 minute walk. The newer Lentor MRT on the Thomson-East Coast Line is roughly 620 metres in the opposite direction. Having two MRT stations on separate lines within walking distance is a genuine rarity in Singapore’s OCR, and it opens up direct routes to both Orchard (via TEL) and the north-south spine without transfers.
For drivers, the Seletar Expressway and Central Expressway are accessible within minutes, providing reasonable connectivity to the CBD (~20 minutes off-peak) and Changi Airport (~25 minutes). Ang Mo Kio Hub is a short drive away for larger retail needs, while the immediate Yio Chu Kang vicinity offers a mix of coffee shops, provision shops, and neighbourhood eateries along the main road.
The education cluster is solid for families. Yio Chu Kang Primary School is 1.2 km away, with Mayflower Primary at 1.4 km. For tertiary education, Nanyang Polytechnic sits just under 1 km from the development — convenient for older students. Anderson-Serangoon Junior College is also within reasonable reach.
The neighbourhood character is changing rapidly. What was once a quiet, slightly sleepy stretch between Ang Mo Kio and Yio Chu Kang is now an active development corridor. The five new launches surrounding Lentor MRT — with over 3,100 incoming units — will bring new retail, dining, and community amenities that Castle Green residents will benefit from without paying new-launch prices.
Schools & Education
| School | Type | Distance |
|---|---|---|
| Nanyang Polytechnic | tertiary | Within 1 km |
| Yio Chu Kang Primary School | primary | ~1.2 km |
| Yio Chu Kang Secondary School | secondary | ~1.2 km |
| Institute of Technical Education (College Central) | tertiary | ~1.3 km |
| Mayflower Primary School | primary | ~1.4 km |
| Ang Mo Kio Secondary School | secondary | ~1.5 km |
| Ang Mo Kio Primary School | primary | ~1.5 km |
| Chong Boon Secondary School | secondary | ~1.5 km |
Facilities
As a 1997-era development with 664 units, Castle Green offers the standard facilities suite of its generation rather than the resort-style amenity clusters found in contemporary launches. Expect a swimming pool, wading pool, tennis court, gymnasium, function room, BBQ pits, a playground, and landscaped gardens. The grounds are reasonably spacious for the unit count, and the mature landscaping — nearly three decades of growth — gives the estate a lush, established feel that newer developments cannot replicate overnight.
The facilities are functional rather than flashy. There is no 50-metre lap pool, no sky terrace, and no co-working lounge. Residents who prioritise gym equipment and pool quality will likely want to supplement with an external gym membership. That said, the development’s age means common areas have been through multiple MCST upgrade cycles, and the grounds are generally well-maintained for a development approaching its 30th year.
One practical advantage of a large, older development: maintenance fees tend to be more manageable per unit due to the 664-unit base spreading costs. There are no premium amenities (infinity pools, tennis coaches, concierge services) inflating the monthly bill.
Unit Sizes & Layout
Castle Green’s unit layouts reflect the generous space standards of the mid-1990s. Units are noticeably larger than their modern equivalents — a pattern familiar to anyone who has compared 1990s-era condos with today’s increasingly efficient (read: compact) floor plans. Rooms are squarer, corridors wider, and kitchens have space for actual cooking rather than token galley setups.
The development offers a mix of unit types across its blocks, with layouts that favour livability over showroom aesthetics. Natural ventilation is generally good across stacks, and many units benefit from unobstructed views given the relatively low-density surroundings — though this will evolve as the Lentor new launches rise around the area.
Buyers should expect to budget for renovation. At nearly 30 years old, original fittings — particularly bathrooms, kitchen cabinetry, and flooring — will need updating. Electrical wiring and plumbing may also warrant inspection and selective replacement. This is standard for developments of this vintage, but the renovation cost should be factored into any price comparison with turnkey new launches.
| Bedrooms | Transactions | Avg PSF | Avg Price |
|---|---|---|---|
| 2 BR | 52 | $1,119 | $1,060,357 |
| 3 BR | 62 | $1,180 | $1,404,376 |
| 4 BR | 27 | $1,201 | $1,719,321 |
Pricing & Market Position
Based on 141 recorded transactions, sale prices range from $808,000 to $2,308,888, averaging $1,337,812 (~$1,398 psf).
Rents range from $1,950 to $5,200 per month across 365 rental transactions. Current rental yield sits at approximately 3.1%.
Price Appreciation
From 2021 to 2026, the average PSF has appreciated by 44.3% (from $956 to $1,379 psf).
Neighbourhood Comparison
The competitive landscape around Castle Green is dominated by a cluster of new launches along the Lentor TEL corridor. Lentor Mansion (S$2,266 psf, 99yr from 2023, 533 units), Lentor Central Residences (S$2,222 psf, 99yr from 2023, 477 units), and Springleaf Residence (S$2,178 psf, 99yr from 2024, 941 units) all offer fresh leases and brand-new finishings, but at 55–65% PSF premiums over Castle Green.
The comparison is not apples-to-apples. A buyer choosing Castle Green at S$1,386 psf is effectively paying a lower entry price in exchange for a shorter lease runway and older finishings. For a 3-bedroom equivalent, the absolute price difference could exceed S$500,000 — capital that can fund a complete renovation and still leave substantial savings. However, the new launches will hold their lease value far longer, making them stronger candidates for buyers with a 20+ year investment horizon.
Lentor Modern (S$2,132 psf, 605 units) is the most directly comparable new launch given its proximity to Lentor MRT and integrated retail podium. It represents what the Lentor corridor’s future looks like — and its pricing establishes the ceiling against which Castle Green’s discount is measured.
| Development | Tenure | TOP | Units | ~Avg PSF |
|---|---|---|---|---|
| CASTLE GREEN | 99 yrs lease commencing from 1993 | 1997 | 664 | $1,398 |
| SPRINGLEAF RESIDENCE | 99 yrs lease commencing from 2024 | 2025 | 941 | $2,178 |
| LENTOR MODERN | 99 yrs lease commencing from 2021 | 2022 | 605 | $2,137 |
| LENTOR HILLS RESIDENCES | 99 yrs lease commencing from 2022 | 2023 | 598 | $2,116 |
| LENTOR MANSION | 99 yrs lease commencing from 2023 | 2024 | 533 | $2,266 |
| LENTOR CENTRAL RESIDENCES | 99 yrs lease commencing from 2023 | 2025 | 477 | $2,222 |
Lease Decay Analysis
The 99-year lease runs from 1993, meaning approximately 33 years have already been consumed. Roughly 66 years remain — still comfortably within the range where most banks will offer full financing without restrictions.
| Year | Lease remaining | Implication |
|---|---|---|
| 2026 (now) | ~66 years | Full bank financing available |
| 2032 | ~59 years | Approaching 60-year threshold — CPF limits begin for some |
| 2052 | ~39 years | Significant financing restrictions for next buyer |
| 2092 | Expiry | Lease reverts to state |
For a buyer purchasing today with a 10-year horizon (exit around 2036), the lease situation is essentially a non-issue — you’d be selling a property with ~56 years remaining, which is still very bankable. The risk profile changes for longer holds.
ShiokNest Scores
Our proprietary scoring system evaluates CASTLE GREEN across multiple dimensions.
What Residents Say
“The best thing about Castle Green now is the Lentor MRT — suddenly we have two MRT stations within walking distance. The whole area is changing with all the new condos coming up.”
— Long-term resident, property forum discussion
“Spacious units and quiet compound, but showing its age. Expect to spend on renovation if you buy a resale unit here. The pool area could use an upgrade.”
— Recent buyer review via PropertyGuru
“Good value compared to the new launches around Lentor, but you need to be realistic about the lease. We bought for own stay and the savings let us do a full renovation.”
— Owner via EdgeProp
Resident sentiment tracks a consistent theme: appreciation for the space, greenery, and improving connectivity, balanced against honest acknowledgment of the development’s age and lease position. Long-term residents in particular highlight the Lentor MRT opening as a transformative event for daily convenience. The community skews toward families and longer-term owner-occupiers rather than short-cycle investors — a profile consistent with the development’s character and lease dynamics.
Value per square foot versus the sub-market. With a 2026 average PSF of S$1,379 (as of 2026-Q2), Castle Green trades at a 37–40 percent discount to the Lentor new-launch cluster. A 3-bedroom unit at Castle Green has transacted at an average of S$1,557k in 2024–2025 compared to S$1.8–2.0M+ for comparable-sized units in Hillock Green or Lentor Mansion. That S$300–400k savings window is the single most compelling entry point in District 26 for budget-conscious upgraders who have already exhausted the HDB market and need school-zone proximity.
Dual MRT access. Lentor MRT (TEL, ~550m, 7-minute walk) and Yio Chu Kang MRT (NSL, ~802m, 9-minute walk) give residents flexibility that single-line estates cannot match. The TEL runs direct to Caldecott (Circle Line) and Orchard; the NSL runs to City Hall and Jurong East. For households with two commuters heading to different parts of the city, the two-line split meaningfully reduces daily travel time (as of 2026-Q1 LTA rail schedules). Check the commute-time map to model your specific journey.
Large-estate living with full facilities. At 664 units across five blocks on an expansive site, Castle Green maintains a community scale that Singapore’s 400-unit-and-below boutique launches simply cannot replicate. Two swimming pools, a gymnasium, tennis courts, squash courts, a clubhouse, and an on-site minimart give the estate a self-contained feel. Resident reviews consistently flag the “country feel” and wide greenery — a contrast with the denser street frontage of newer Lentor projects.
School-zone premium captured. Anderson Primary School and CHIJ St Nicholas Girls’ School (SAP status, one of Singapore’s most selective independent schools) both fall within the addressable priority zone. For families targeting either institution, Castle Green’s address provides genuine Phase 2B proximity advantage at a price point that OCR D9/D10 equivalents near brand-name schools would never offer. Use the Livability Scores map to cross-check school, walkability, and amenity scores for this address.
Rental yield support. Castle Green generated average monthly rents of S$3,804–S$3,951 across 2024–2026 (as of 2026-Q2), driven by a mix of 2BR units averaging S$3,469/month and 3BR units averaging S$4,138/month. Against a typical entry price of S$1.25–S$1.56M for 2–3BR units, gross yield sits in the 3.1–3.3% range — above the 2.5–2.8% typical for Lentor new-launches at current launch prices. Use the ROI calculator to model your specific purchase price and rental assumptions.
District 26 — Upper Thomson, Lentor, Springleaf — has undergone the most concentrated launch activity of any OCR sub-market since 2022. Lentor Mansion (533 units, 2024 TOP, ~S$2,266 psf), Lentor Central Residences (477 units, 2025 TOP, ~S$2,222 psf), Springleaf Residence (941 units, 2025 TOP, ~S$2,178 psf), and Hillock Green (474 units, 2023 TOP, ~S$2,212 psf) collectively added over 2,400 units to the sub-market in three years (as of 2026-Q1). The Thomson-East Coast Line (TEL), fully operational since 2024, underpins every one of those launch prices — Lentor MRT gives residents a one-stop connection to Bright Hill (Cross Island Line interchange) and a direct run to Orchard in under 20 minutes.
Castle Green sits approximately 550m from Lentor MRT and 802m from Yio Chu Kang MRT on the North-South Line — dual-line access that most Lentor new-launches cannot offer. Yet its resale PSF of S$1,364 in 2025 and S$1,379 in 2026 (as of 2026-Q2) sits nearly 40 percent below the sub-market’s new-launch benchmark. The discount is almost entirely explained by lease tenure: a 99-year lease commencing 1993 means approximately 66 years remain, crossing the 60-year CPF withdrawal threshold in 2033. Buyers aged 35 or under can still use CPF without restriction, but the clock is ticking for every cohort above that age bracket. The 99-Year Leasehold Condo Guide on lease decay, CPF limits, and exit strategy sets out exactly how these thresholds interact with buyer age and loan quantum — it is essential reading before signing an OTP on any sub-1993 lease. Singapore’s HDB CPF usage guidelines and the MAS TDSR framework both impose tighter constraints as remaining lease shrinks — buyers should model both before committing.
On the school front, Anderson Primary School and CHIJ St Nicholas Girls’ School (a SAP school) sit within the 1–2 km registration priority zone, a meaningful advantage in Phase 2B and 2C balloting for families targeting these institutions (as of 2026-Q1 MOE registration guidance).
Lease tenure is the headline risk. With the lease commencing in 1993, Castle Green reaches the 60-year mark in 2053 and the 30-year mark in 2083. Under current CPF Board rules, buyers aged above 35 at the point of purchase will find CPF withdrawal progressively restricted as the remaining lease shortens below 60 years on their projected hold — the lease decay math works against older buyers on a shorter hold. The Freehold vs 99-Year Leasehold complete analysis models the CPF pro-ration formula in detail. Exit timing matters: the optimal window is well before the remaining lease crosses 55 years (~2039), after which the pool of eligible buyers narrows and bank financing tightens. Run the lease-decay calculator with your planned hold period before committing (as of 2026-Q2 CPF rules).
Aging infrastructure and maintenance costs. A 1997 TOP means common facilities — the gym, courts, pool filtration systems, lifts — are approaching or past the 25-30 year replacement cycle. Buyers should request the last three years of MCST meeting minutes and maintenance fund statements before purchase. Aging facilities reduce the competitive appeal for tenants who have newer-build alternatives in the same postal district, which could compress future rental yields if MCST levies rise materially to fund capital-expenditure cycles.
No direct MRT accessibility. While both Lentor (TEL) and Yio Chu Kang (NSL) are within walking distance, neither is what any reasonable buyer would classify as “MRT doorstep.” The 550m walk to Lentor involves crossing Yio Chu Kang Road — a multi-lane arterial — and is exposed to weather. For residents without a vehicle, peak-hour bus-to-MRT connectivity adds a meaningful commute buffer. Compare this to Lentor Modern or Hillock Green, which are literally a two-minute walk from the station entrance.
Price ceiling compression from Lentor new-launches. The sub-market’s new-launch pricing (S$2,150–S$2,330 psf as of 2026-Q2) sets a ceiling that Castle Green cannot penetrate on resale, regardless of renovation quality. As long as new supply keeps entering D26 at these price points, Castle Green’s PSF upside is capped by the perception that buyers prefer new over resale at only a modest premium. Capital growth will lag the new-launch cohort in absolute terms.
[
{
"persona": "HDB Upgrader",
"fit_color": "green",
"reason": "S$1.25–S$1.56M for 2–3BR is the most attainable private condo price point in D26 (as of 2026-Q2). School-zone premium for Anderson Primary and CHIJ SNGS directly addresses upgrader family priorities. Rental income during the transition period is achievable at 3.1–3.3% gross yield."
},
{
"persona": "Young Couple (first private purchase)",
"fit_color": "green",
"reason": "Buyers under 35 sidestep the CPF lease-tenure restriction. Entry price for a 2BR under S$1.3M with dual-MRT access is a strong value proposition for a first private home. Large estate with full facilities reduces the lifestyle compromise vs newer builds."
},
{
"persona": "Family with school-age children",
"fit_color": "green",
"reason": "Anderson Primary and CHIJ St Nicholas Girls’ School within the 1–2km Phase 2B zone is a direct match. The estate’s large grounds, quiet environment, and on-site minimart suit family daily routines. Enough bedrooms at accessible price points."
},
{
"persona": "Investor (buy-to-let)",
"fit_color": "amber",
"reason": "Gross yield of 3.1–3.3% is above Lentor new-launch norms, but the aging lease compresses the hold horizon and future exit pool. Best suited for shorter 5–8 year hold strategies timed before the 2033 CPF threshold year. Model carefully with the <a href=\"/calculator/btl\">buy-to-let calculator</a>."
},
{
"persona": "Upgrader aged 45+",
"fit_color": "amber",
"reason": "CPF withdrawal limits begin to bite at the 60-year lease mark (2053), meaning a buyer aged 45 in 2026 holds through their 70s before restrictions kick in on exit. Manageable but worth stress-testing against retirement asset-liquidation plans."
},
{
"persona": "Foreign Professional (long-term rental seeker)",
"fit_color": "amber",
"reason": "Large units, good facilities, and school proximity make this an attractive rental. However, ABSD at 60% for foreigners purchasing makes this a rental-only proposition; foreign buyers should direct ownership interest elsewhere."
}
]
Castle Green is a development that wears its age on its sleeve but carries a financial logic that newer Lentor projects cannot match at any price point available today. The 37–40 percent PSF discount to D26’s new-launch benchmark is not a mistake — it reflects the lease remaining at ~66 years and facilities that are now three decades old. For buyers who understand both those factors and can work within them, it represents genuine value in a sub-market where the Lentor cluster has absorbed most of the “freshness premium.”
The recommended buyer is an HDB upgrader or young couple who wants school-zone proximity (Anderson Primary or CHIJ St Nicholas), can absorb the CPF lease restrictions if aged above 35, and values the large-estate living experience over new-build gloss. An investor targeting a 6–8 year hold with an exit before 2033 can capture the 3.1–3.3% gross yield and ride any residual D26 capital appreciation without hitting the CPF threshold crunch. The total-cost calculator and stamp duty calculator should be your first two stops when modelling the entry economics (as of 2026-Q2 IRAS ABSD and BSD rates).
Holding period: the optimal window is 5–10 years from purchase, exiting by the early 2030s before the remaining lease falls below 60 years and buyer eligibility narrows. Anyone planning a 15-year-plus hold should weigh whether the capital locked into a sub-1993 leasehold serves retirement liquidity better than a newer asset. Compare this estate against the District 26 overall market on the District 26 property guide before making a final call.