CONDODistrict 26

CASTLE GREEN

Name: CASTLE GREEN
Address: SG

Details

Project: CASTLE GREEN
TOP year: 1997
Tenure: 99
Lease start: 1993
Total units: 664
Land size: 39,151 sqm (421,423 sqft)
Plot ratio: 2.1
Developer: Coming soon
Gross rental yield: ~3.2% · ~$1.48M (est.)
Storeys: 13
Market segment: OCR
District: 26

Nearby Schools

Nearest primaryANDERSON PRIMARY SCHOOL155 m

Nearest school of each kind — Tier-1, GEP, SAP — straight-line (“as the crow flies”) from the development per MOE’s P1 method; a school that qualifies for several kinds is listed once with all its badges. Tier-1 marks historically oversubscribed primaries; the full 1 km / 2 km priority list is below.

Upcoming MRT

2.0 km from Ang Mo Kio (CRL Phase 1), opening 2030 · ~25 min walk

Unit Catalogue for CASTLE GREEN

Total units	664
Blocks	4
Size range	947–1,593 sqft

Bedrooms	Units	Share
2-bedroom	248	37%
3-bedroom	320	48%
4-bedroom	96	14%

Gross Rental Yield by Bedroom

haio estimate — median rent ÷ modelled price (median PSF × median size), trailing 12 months. Gross only; excludes maintenance, tax and vacancy.

Bedrooms	Gross yield	Est. price	Leases (12m)
2 BR	~3.1%	~$1.3M	47
3 BR	~3.4%	~$1.51M	36
4 BR	~2.8%· low sample (3 sales)	~$2.16M	10

Relevant market insights

En-Bloc Likelihood

High likelihood

Ranks near the top for redevelopment interest among private condos.

CASTLE GREEN is ranked for collective-sale (en-bloc) potential over the next 5 years, relative to other private condos. We show a relative tier, not a percentage — the ranking is reliable, an exact probability is not.

Driven by: 29 years old · 66 years left on the lease · average unit ~1,152 sqft

Based on 4 comparable past collective-sale deals (GREEN LODGE 2012, MAYFAIR GARDENS 2017, YI MEI GARDENS 2013).

A ranking signal, not advice or a prediction of any specific outcome. How this is calculated

Selling Pressure

haio estimate

Lower selling pressure

Fewer neighbours are free or motivated to sell than at most comparable properties.

haio tracks 169 of 664 units at CASTLE GREEN. 67% of tracked units are free to sell now (past the seller’s-stamp-duty window) and 24% have been held over 10 years.

67%

Free to sell now

113 of 169 tracked · past SSD

70%

Sitting on a gain

683 of 975 resales sold above cost

A haio ranking signal, not a probability or advice — useful to time your own exit, to gauge incoming supply as a buyer, or to plan coverage as an agent. How this is calculated

Price Action

Beds

Find out the value of my home

Transaction History

Beds

Period

Size–sqft

Showing 10 of 1136 total recorded transactions.

							Sellable from
May 2026	Resale	$2,160,000	1,410	$1,532	4BR	—	Q2 2030
Apr 2026	Resale	$1,560,000	1,216	$1,283	3BR	—	Q2 2030
Apr 2026	Resale	$1,300,000	947	$1,373	2BR	—	Q2 2030
Apr 2026	Resale	$1,660,000	1,151	$1,442	3BR	—	Q2 2030
Mar 2026	Resale	$1,600,000	1,151	$1,390	3BR	—	Q1 2030
Mar 2026	Resale	$1,370,000	947	$1,447	2BR	—	Q1 2030
Mar 2026	Resale	$2,150,000	1,410	$1,525	4BR	—	Q1 2030
Feb 2026	Resale	$1,302,000	947	$1,375	2BR	—	Q1 2030
Feb 2026	Resale	$1,250,888	947	$1,321	2BR	—	Q1 2030
Jan 2026	Resale	$1,260,000	947	$1,331	2BR	—	Q1 2030

Sellable from: the quarter that buyer clears the Seller's Stamp Duty holding period in force at purchase (3 or 4 years, by purchase date).

Nearby Transactions

DistanceWithin 300 m

3 condo transactions from other properties within 300 m, newest first.

Project	Distance	Date	Type	Price (SGD)	Area (sqft)	PSF
Nuovo	188 m	2026-05-01	Resale	$1,470,000	1,119	$1,314
Nuovo	188 m	2026-04-01	Resale	$1,708,888	1,280	$1,335
Nuovo	188 m	2026-04-01	Resale	$2,165,000	1,840	$1,177

Profit & Loss

haio estimate

134 realized resale exits at CASTLE GREEN over the 5y window — 134 profitable, 0 at a loss, averaging 2.44%/yr.

Profit Distribution

Unit Type	Volume	Holding (avg)	Annualised (avg)
3BR	47	28y 5m	2.18%
4BR	83	28y 5m	2.62%
5BR+	4	27y 8m	1.97%
Total	134	28y 5m	2.44%

Loss Distribution

No loss-making resales in this window — every matched exit sold above its matched entry price.

Realized resales: each resale / sub-sale (the exit) is matched to a comparable new-sale (the entry) at the same project by floor band and strata area, then the annualised return is (exit ÷ entry) ^ (1 ÷ years held) − 1. URA caveats only. haio estimate — URA masks unit numbers after May 2021, so entries are matched by area + floor, not exact unit. Executive Condos are shown as a separate segment.

RadiusWithin 4.0 km

Buyer Demand vs Competing Supply

haio estimate

x.x×demand vs supply · this year

Demand

xx,xxx

Nearby upgraders becoming able to buy a unit like yours this year

xx,xxx in the standing upgrader pool today

Supply

xx,xxx

Competing units coming up for sale nearby this year

xx,xxx competing units in the standing pool today

xx% demandxx% supply

xx,xxx HDB households within 4km of CASTLE GREEN. xx,xxx are in the addressable upgrader pool — MOP-eligible blocks, net of recent resale resets.

xx,xxx sellable now+xx,xxx on resale clock+xx,xxx future MOP=xx,xxx total

xx,xxx households are in past-MOP blocks but were resold in the last 5 years — the new buyer's own MOP restarted, so these are excluded from the sellable-now pool.

Supply vs Demand by year within 4km · actual

In plain English: what’s free to sell right now — units that have already cleared their SSD/MOP lock-up.

Actual= booked supply only — real resale caveats coming off their seller’s stamp duty (SSD) holding period (3 or 4 years, by purchase date) plus GLS-awarded new launches. Every figure is a recorded transaction or an awarded parcel: what is genuinely on the SSD/MOP clock today. The demand:supply ratio (top row) is computed on this booked supply.

Neutral read: a higher ratio = demand outweighs supply; the trend shows if it’s tightening or easing. A haio estimate.

MOP estimated as HDB completion year + 5 (standard scheme); +10 for Plus/Prime/PLH blocks. Able-to-sell figure nets out resale transactions in the last 5 years (those buyers' own MOP restarted). haio estimate — not guaranteed to reflect individual flat eligibility.

haio+

Exit Audience is a haio+ feature

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Exit Risk

haio unit-level records

If you bought at CASTLE GREEN today at ~$1,375 psf (the recent resale median — last 12 months, 19 sales)…

91.7%

of current owners hold at a lower PSF — they could sell below your entry and still profit.

n=169 traced current owners, 98.8% unit-exact

haio+

the Exit-Risk band is a haio+ feature

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The headline share is an exact count over haio’s unit-level records — one entry price per traced current owner. “Today’s price” is the last-12-months resale median, an anchor, not a valuation. In appreciated projects most owners naturally hold cheaper — long holders rarely sell low, so read it with the SSD-free share. Not advice. How this is calculated

West Sun Exposure

When direct sun lands on a West-facing window at CASTLE GREEN, for the date you pick.

Unit facing (your selection)

Date

6 am9 am12 pm3 pm6 pm8 pm

Direct sun on this facing
Worst window (overlaps 2–6 pm peak heat)

Direct sun on a West-facing window: 2:02 pm – 7:14 pm (5 h 12 m total). Worst stretch: 2:02 pm – 6:00 pm (falls in the 2–6 pm peak-heat band).

Sun at 3:30 pm on 2026-07-10: azimuth 304° (NW), elevation 50°.

Estimated from solar geometry — nearby buildings and blockage are not modelled.

Where Else You Can Buy

Anchored to this project's estimated price (~S$1.55M, the median of recent sale transactions at CASTLE GREEN) — drag to explore what else that budget buys across Singapore.

Nearby Condos

11 within 1 km

Lowest

$1,119

psf

Average

$1,916

psf

Highest

$2,412

psf

This propertyNearby condo


188 m	Nuovo	LH	2004	$1,333
445 m	Far Horizon Gardens	LH	1986	$1,119
605 m	The Calrose	FH	2007	$1,957
613 m	Thomson Grove	FH	1984	$1,588
692 m	Lentor Modern	LH	2026	$2,412
752 m	Lentor Central Residences	LH	2028	$2,218
823 m	Hillock Green	LH	2026	$2,234
837 m	Lentor Hills Residences	LH	2028	$2,173
916 m	Lentoria	LH	2027	$2,279
934 m	Lentor Mansion	LH	2028	$2,207
942 m	Bullion Park	FH	1993	$1,554

Project-level medians from haio’s own transaction data — median sale $ psf (last 2 years) and, in each pin, median monthly rent $ psf. Distances are straight-line from this property. Blank where there are no recent sales.

Primary Schools Within 1 km / 2 km

Anderson Primary School≤ 1 km155 m
Mayflower Primary School1–2 km1.05 km
Ang Mo Kio Primary School1–2 km1.8 km
Jing Shan Primary SchoolWithin 2 km of blocks 483 & 485 only1–2 km1.91 km

Distances are measured per block (straight-line, MOE method) and the nearest block’s distance is shown; where blocks differ, the qualifying blocks are named. The balloting distance is from your exact unit’s block. Distance sets priority within each registration phase; balloting still applies — see MOE’s P1 registration rules.

Amenities

MOE Primary One priority (1 km / 2 km) is measured from your home’s postal address — see the full Valuation Report for your unit.

What's next

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CONDODistrict 26

CASTLE GREEN

Details

Project: CASTLE GREEN
TOP year: 1997
Tenure: 99
Lease start: 1993
Total units: 664
Land size: 39,151 sqm (421,423 sqft)
Plot ratio: 2.1
Developer: Coming soon
Gross rental yield: ~3.2% · ~$1.48M (est.)
Storeys: 13
Market segment: OCR
District: 26

Nearby Schools

Nearest primaryANDERSON PRIMARY SCHOOL155 m

Upcoming MRT

2.0 km from Ang Mo Kio (CRL Phase 1), opening 2030 · ~25 min walk

Unit Catalogue for CASTLE GREEN

Total units	664
Blocks	4
Size range	947–1,593 sqft

Bedrooms	Units	Share
2-bedroom	248	37%
3-bedroom	320	48%
4-bedroom	96	14%

Gross Rental Yield by Bedroom

haio estimate — median rent ÷ modelled price (median PSF × median size), trailing 12 months. Gross only; excludes maintenance, tax and vacancy.

Bedrooms	Gross yield	Est. price	Leases (12m)
2 BR	~3.1%	~$1.3M	47
3 BR	~3.4%	~$1.51M	36
4 BR	~2.8%· low sample (3 sales)	~$2.16M	10

Relevant market insights

En-Bloc Likelihood

High likelihood

Ranks near the top for redevelopment interest among private condos.

Driven by: 29 years old · 66 years left on the lease · average unit ~1,152 sqft

Based on 4 comparable past collective-sale deals (GREEN LODGE 2012, MAYFAIR GARDENS 2017, YI MEI GARDENS 2013).

A ranking signal, not advice or a prediction of any specific outcome. How this is calculated

Selling Pressure

haio estimate

Lower selling pressure

Fewer neighbours are free or motivated to sell than at most comparable properties.

haio tracks 169 of 664 units at CASTLE GREEN. 67% of tracked units are free to sell now (past the seller’s-stamp-duty window) and 24% have been held over 10 years.

67%

Free to sell now

113 of 169 tracked · past SSD

70%

Sitting on a gain

683 of 975 resales sold above cost

A haio ranking signal, not a probability or advice — useful to time your own exit, to gauge incoming supply as a buyer, or to plan coverage as an agent. How this is calculated

Price Action

Beds

Find out the value of my home

Transaction History

Beds

Period

Size–sqft

Showing 10 of 1136 total recorded transactions.

							Sellable from
May 2026	Resale	$2,160,000	1,410	$1,532	4BR	—	Q2 2030
Apr 2026	Resale	$1,560,000	1,216	$1,283	3BR	—	Q2 2030
Apr 2026	Resale	$1,300,000	947	$1,373	2BR	—	Q2 2030
Apr 2026	Resale	$1,660,000	1,151	$1,442	3BR	—	Q2 2030
Mar 2026	Resale	$1,600,000	1,151	$1,390	3BR	—	Q1 2030
Mar 2026	Resale	$1,370,000	947	$1,447	2BR	—	Q1 2030
Mar 2026	Resale	$2,150,000	1,410	$1,525	4BR	—	Q1 2030
Feb 2026	Resale	$1,302,000	947	$1,375	2BR	—	Q1 2030
Feb 2026	Resale	$1,250,888	947	$1,321	2BR	—	Q1 2030
Jan 2026	Resale	$1,260,000	947	$1,331	2BR	—	Q1 2030

Sellable from: the quarter that buyer clears the Seller's Stamp Duty holding period in force at purchase (3 or 4 years, by purchase date).

Nearby Transactions

DistanceWithin 300 m

3 condo transactions from other properties within 300 m, newest first.

Project	Distance	Date	Type	Price (SGD)	Area (sqft)	PSF
Nuovo	188 m	2026-05-01	Resale	$1,470,000	1,119	$1,314
Nuovo	188 m	2026-04-01	Resale	$1,708,888	1,280	$1,335
Nuovo	188 m	2026-04-01	Resale	$2,165,000	1,840	$1,177

Profit & Loss

haio estimate

134 realized resale exits at CASTLE GREEN over the 5y window — 134 profitable, 0 at a loss, averaging 2.44%/yr.

Profit Distribution

Unit Type	Volume	Holding (avg)	Annualised (avg)
3BR	47	28y 5m	2.18%
4BR	83	28y 5m	2.62%
5BR+	4	27y 8m	1.97%
Total	134	28y 5m	2.44%

Loss Distribution

No loss-making resales in this window — every matched exit sold above its matched entry price.

RadiusWithin 4.0 km

Buyer Demand vs Competing Supply

haio estimate

x.x×demand vs supply · this year

Demand

xx,xxx

Nearby upgraders becoming able to buy a unit like yours this year

xx,xxx in the standing upgrader pool today

Supply

xx,xxx

Competing units coming up for sale nearby this year

xx,xxx competing units in the standing pool today

xx% demandxx% supply

xx,xxx HDB households within 4km of CASTLE GREEN. xx,xxx are in the addressable upgrader pool — MOP-eligible blocks, net of recent resale resets.

xx,xxx sellable now+xx,xxx on resale clock+xx,xxx future MOP=xx,xxx total

xx,xxx households are in past-MOP blocks but were resold in the last 5 years — the new buyer's own MOP restarted, so these are excluded from the sellable-now pool.

Supply vs Demand by year within 4km · actual

In plain English: what’s free to sell right now — units that have already cleared their SSD/MOP lock-up.

Neutral read: a higher ratio = demand outweighs supply; the trend shows if it’s tightening or easing. A haio estimate.

haio+

Exit Audience is a haio+ feature

Start your 3-day free trial — no charge today, cancel anytime.

Exit Risk

haio unit-level records

If you bought at CASTLE GREEN today at ~$1,375 psf (the recent resale median — last 12 months, 19 sales)…

91.7%

of current owners hold at a lower PSF — they could sell below your entry and still profit.

n=169 traced current owners, 98.8% unit-exact

haio+

the Exit-Risk band is a haio+ feature

Start your 3-day free trial — no charge today, cancel anytime.

West Sun Exposure

When direct sun lands on a West-facing window at CASTLE GREEN, for the date you pick.

Unit facing (your selection)

Date

6 am9 am12 pm3 pm6 pm8 pm

Direct sun on this facing
Worst window (overlaps 2–6 pm peak heat)

Direct sun on a West-facing window: 2:02 pm – 7:14 pm (5 h 12 m total). Worst stretch: 2:02 pm – 6:00 pm (falls in the 2–6 pm peak-heat band).

Sun at 3:30 pm on 2026-07-10: azimuth 304° (NW), elevation 50°.

Estimated from solar geometry — nearby buildings and blockage are not modelled.

Where Else You Can Buy

Anchored to this project's estimated price (~S$1.55M, the median of recent sale transactions at CASTLE GREEN) — drag to explore what else that budget buys across Singapore.

Nearby Condos

11 within 1 km

Lowest

$1,119

psf

Average

$1,916

psf

Highest

$2,412

psf

This propertyNearby condo


188 m	Nuovo	LH	2004	$1,333
445 m	Far Horizon Gardens	LH	1986	$1,119
605 m	The Calrose	FH	2007	$1,957
613 m	Thomson Grove	FH	1984	$1,588
692 m	Lentor Modern	LH	2026	$2,412
752 m	Lentor Central Residences	LH	2028	$2,218
823 m	Hillock Green	LH	2026	$2,234
837 m	Lentor Hills Residences	LH	2028	$2,173
916 m	Lentoria	LH	2027	$2,279
934 m	Lentor Mansion	LH	2028	$2,207
942 m	Bullion Park	FH	1993	$1,554

Primary Schools Within 1 km / 2 km

Anderson Primary School≤ 1 km155 m
Mayflower Primary School1–2 km1.05 km
Ang Mo Kio Primary School1–2 km1.8 km
Jing Shan Primary SchoolWithin 2 km of blocks 483 & 485 only1–2 km1.91 km

Amenities

MOE Primary One priority (1 km / 2 km) is measured from your home’s postal address — see the full Valuation Report for your unit.

What's next

Compare with another Get home services