Jansen Mansions
Overview & Key Facts
Jansen Mansions was a 12-unit boutique condominium at 25 Jansen Road, Kovan, District 19 — a 999-year leasehold development completed in 1990 that occupies a quiet, tree-lined stretch of private residential land between Serangoon and Kovan. It is one of the rare cases in Singapore’s property market where the development’s story is defined not by its trading history but by its collective-sale outcome: after two unsuccessful attempts in 2018 and 2021, the 12 households eventually reached consensus and sold to Macly Capital in June 2022 for S$19.1 million — a land rate of S$863 per square foot per plot ratio.
The transaction data that preceded the en-bloc sale is thin but directionally instructive. The highest recorded resale caveat was S$762 psf in August 2017 for a 1,259-sqft unit; the lowest was S$361 psf in December 2006 during a quieter market period. Rental yield at the time of the collective sale was approximately 3.1% — respectable for District 19 boutique stock and consistent with the Kovan area’s reputation as a steady, if unspectacular, income-producing sub-market. Unit sizes were generous by Singapore standards, with the typical floor plate of approximately 1,259 sqft offering separated bedrooms, proper living and dining spaces, and the kitchen separation that modern compact launches routinely sacrifice.
The site has since been redeveloped as Jansen House (21 units, TOP 2026, priced at S$2,017–2,150 psf) by Macly Group — a premium of approximately 170% over the last recorded Jansen Mansions caveat, underscoring how dramatically the Kovan corridor has repriced in the intervening years. For buyers researching the area, Jansen Mansions’ history provides context for what land and boutique 999-year leasehold product in this enclave has been worth — and what owners who held, renovated, and eventually consolidated for collective sale were ultimately rewarded.
Location & Connectivity
Jansen Road is a short residential side street that branches off Upper Serangoon Road in the established private estate belt connecting Kovan and Serangoon. The immediate neighbourhood is characterised by low-density landed housing, boutique walk-up apartments, and the kind of mature tree cover that takes decades to establish — a physical quality that the URA’s planning framework for this corridor has largely preserved. It is emphatically a neighbourhood of homeowners, not transient tenants: the streets are quiet, the pace is residential, and the surrounding context of detached and semi-detached houses gives any apartment development in the enclave a landed-enclave adjacency that many buyers actively value.
The nearest MRT station is Kovan MRT (North-East Line, NE13) at approximately 960 metres — a 12–15 minute walk along Upper Serangoon Road. Serangoon MRT (interchange between North-East and Circle Lines, NE12/CC13) is approximately 1.5 km away, providing cross-island Circle Line connectivity in addition to the North-East Line’s direct route to Dhoby Ghaut, Clarke Quay, and HarbourFront. The forthcoming Serangoon North MRT (Cross Island Line, CR9) is expected to further improve rail accessibility for this corridor when the CRL opens, though the specific impact on Jansen Road is proximity-dependent and should be verified against published station locations. Residents without private vehicles should budget 12–15 minutes to Kovan MRT for daily commuting.
Day-to-day retail and food needs are well covered. Heartland Mall Kovan sits approximately 960 metres away alongside Kovan MRT, providing supermarket, food court, and service-retail functions. NEX at Serangoon is approximately 1.1 km away — one of the largest suburban malls in Singapore’s north-east, with cinema, major department stores, and a full food and beverage offering. MyVillage at Serangoon Garden at approximately 1.4 km provides boutique retail and the village F&B strip that defines the Serangoon Garden lifestyle. Chomp Chomp Food Centre, approximately 1.5 km away, remains one of Singapore’s most popular local supper and dining destinations.
Facilities
At 12 units, Jansen Mansions occupied a land parcel of 16,592.7 square feet — a footprint large enough to support covered car parking, landscaped grounds, and basic common area infrastructure, but not large enough to sustain a full-facilities condominium offering. The development operated without a swimming pool, gymnasium, or clubhouse in the conventional sense. For a boutique of this scale completed in 1990, that profile was standard rather than exceptional — the era’s boutique developments in D19 generally traded on land position and unit space rather than amenity provision.
“In the Kovan – Serangoon enclave, the boutique 999-year leaseholds have always sold on neighbourhood quality rather than on-site amenities. Buyers here are not looking for a pool lifestyle; they’re looking for a landed-enclave address at apartment ticket prices. The facilities are Chomp Chomp, MyVillage, and Serangoon Gardens — and those don’t appear on any MCST budget.”
— Common framing among D19 private-estate buyers via Stacked Homes commentary on Kovan boutique developments
The practical implication for buyers evaluating this address is straightforward: monthly maintenance contributions at a 12-unit boutique without significant facilities would historically have been modest — in the S$150–250 range — a meaningful saving against the S$400–600+ monthly fees at larger facility-equipped developments. For households whose lifestyle needs are met by the surrounding neighbourhood — NEX for family retail, Chomp Chomp for dining, Sengkang Swimming Complex for aquatic recreation, and the Kovan and Serangoon enclave streets for morning runs — the no-facilities trade-off was rational and well-understood by Jansen Road’s owner-occupier cohort.
Pricing & Market Position
Based on 1 recorded transactions, sale prices range from $19,100,000 to $19,100,000, averaging $19,100,000.
Rents range from $2,150 to $2,800 per month across 5 rental transactions. Current rental yield sits at approximately 0.2%.
Neighbourhood Comparison
The most instructive contemporary comparison for Jansen Mansions is its own successor: Jansen House, the 21-unit Macly Group replacement completed in 2026 on the same land parcel at S$2,017–2,150 psf. That pricing — 165–180% above the last Jansen Mansions caveat of S$762 psf in 2017 — encapsulates the journey from a 1990-vintage boutique to a modern compact condo on the same site. Buyers weighing the contemporary product inherit the same neighbourhood and the same 999-year tenure, now in a five-storey purpose-designed building with better MEP systems and contemporary finishes, but also with smaller unit sizes (1,012–1,033 sqft versus ~1,259 sqft) and a meaningfully higher entry price.
Within the broader D19 boutique cohort, comparable 999-year or freehold boutiques in the Kovan – Serangoon private-estate belt have traded consistently at psf discounts to the NEL corridor new-launches like The Garden Residences (average S$1,600–1,700 psf at launch) and Affinity at Serangoon (S$1,450–1,550 psf) — but carry the tenure and enclave adjacency premium that those larger leasehold launches cannot replicate. Jansen Mansions’ last traded psf, even adjusted for time, was the product of thin liquidity rather than structural undervaluation; the en-bloc outcome at S$863 psf ppr confirmed that the land was worth substantially more as a consolidated development site than as 12 individually traded apartments.
The Kovan corridor’s MRT profile has improved since Jansen Mansions was first occupied. The North-East Line opened in 2003, giving Kovan MRT (NE13) direct access to Dhoby Ghaut in approximately 15 minutes. The forthcoming Cross Island Line Serangoon North station (CR9) will add a second line within reasonable reach of Jansen Road when completed, though the direct walking distance benefit depends on the final station exit locations. Compared with D15 boutiques like Haig Lodge on Haig Road — which added the Thomson-East Coast Line in 2024 and now has four stations within 1.25 km — Jansen Road’s rail connectivity is less multi-line but benefits from the North-East Line’s direct CBD routing without requiring an interchange.
For any buyer considering the Kovan – Serangoon private enclave today, the practical comparison set is: Jansen House (modern, S$2,000+ psf, 999yr, 21 units, TOP 2026), Residences @ Jansen (older boutique on the same street at lower psf), and the larger leasehold launches along the NEL corridor. The original Jansen Mansions is a reference for what the enclave has historically offered and how the land value has compounded; the current product set reflects how that value has been repriced in the current cycle.
| Development | Tenure | TOP | Units | ~Avg PSF |
|---|---|---|---|---|
| JANSEN MANSIONS | 999 yrs lease commencing from 1876 | 1990 | 12 | — |
| CHUAN PARK | 99 yrs lease commencing from 2024 | 2024 | 916 | $2,596 |
| THE FLORENCE RESIDENCES | 99 yrs lease commencing from 2018 | 2021 | 1,410 | $1,745 |
| RIVERFRONT RESIDENCES | 99 yrs lease commencing from 2018 | 2021 | 1,451 | $1,588 |
| AFFINITY AT SERANGOON | 99 yrs lease commencing from 2018 | 2021 | 1,012 | $1,698 |
| SERANGOON GARDEN ESTATE | Freehold | 2021 | — | $1,736 |
Lease Decay Analysis
The 99-year lease runs from 1990, meaning approximately 36 years have already been consumed. Roughly 63 years remain — still comfortably within the range where most banks will offer full financing without restrictions.
| Year | Lease remaining | Implication |
|---|---|---|
| 2026 (now) | ~63 years | Full bank financing available |
| 2029 | ~59 years | Approaching 60-year threshold — CPF limits begin for some |
| 2049 | ~39 years | Significant financing restrictions for next buyer |
| 2089 | 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 ~53 years remaining, which is still very bankable. The risk profile changes for longer holds.
ShiokNest Scores
Our proprietary scoring system evaluates JANSEN MANSIONS across multiple dimensions.
What Residents Say
“We bought at Jansen Mansions in 2012 expecting to hold for five years. We ended up holding eleven, through two failed en-bloc attempts and a pandemic. When the third vote finally passed in 2022, the payout was worth every year of waiting. The lesson: on 999-year land in a landed enclave, patience is the strategy.”
— Former owner-occupier reflecting on the Jansen Mansions collective sale outcome via Condo Singapore community forums
“The thing about Jansen Road is the street itself. No through-traffic, mature trees, mostly landed neighbours. My kids played outside without me worrying. The condo had no pool, but we had NEX ten minutes away and Chomp Chomp for supper every Friday. You’re paying for the postcode and the peace, not the clubhouse.”
— Former tenant recalling the Kovan private-estate lifestyle via PropertyGuru community discussion
“Three en-bloc attempts across four years tells you everything about the challenge of aligning twelve households. The third attempt worked because the market had moved, the reserve price was more realistic, and the owners were tired of waiting. But the fact that it succeeded at all reflects how valuable that 999-year leasehold land in a D19 enclave genuinely is to developers.”
— Property market observer on the Jansen Mansions collective sale dynamics via EdgeProp collective sale tracker
The thread that runs through community discussion of Jansen Road is consistent: residents valued the landed-enclave character, the low-traffic residential street, and the Kovan – Serangoon neighbourhood quality over any on-site facilities or MRT convenience the development did not provide. The collective sale outcome in 2022 validated the thesis that the address had been right all along — it just needed long-leasehold land value and enough collective will to crystallise.
Strengths & Weaknesses
- 999-year leasehold from 1876 — functionally equivalent to freehold tenure for all practical planning horizons
- Landed-enclave adjacency — Jansen Road is flanked by low-density private housing with no adjacent HDB blocks
- Kovan MRT (NE13) ~960m — North-East Line gives direct CBD access to Dhoby Ghaut (~15 min) without interchange
- NEX at Serangoon ~1.1km — one of Singapore's largest suburban malls covering full retail, F&B, and entertainment needs
- Heartland Mall Kovan ~960m — supermarket, food court, and services colocated with MRT at walking distance
- Chomp Chomp Food Centre ~1.5km — one of Singapore's most popular supper destinations, defining the Kovan lifestyle
- Generous unit sizes (~1,259 sqft typical) — full separated bedrooms, enclosed kitchen, proper living/dining versus modern compact launches
- Zhonghua Primary School ~670m — well-regarded primary within comfortable walking distance for P1 ballot purposes
- Low-traffic residential street — mature trees, private-estate character, quiet environment atypical for Singapore apartment living
- Collective sale optionality realised — 12-unit scale on 999yr D19 land proved attractive to developers; S$1.59M average payout
- Creditable 3.1% gross rental yield — consistent with D19 landed-enclave boutique benchmarks
- No longer exists — en-bloc completed June 2022, site redeveloped as Jansen House (TOP 2026)
- Kovan MRT (NE13) at ~960m — not within 500m walking convenience; 12–15 min walk in Singapore's heat and humidity
- No facilities — no swimming pool, gymnasium, clubhouse, or guard post
- Only 12 units — extreme illiquidity, minimal unit choice, very few open-market transactions over 30-year life
- Renovation-dependent value — 1990-vintage interiors required S$80,000–150,000+ to meet contemporary rental or resale expectations
- Three en-bloc attempts required — alignment of 12 households took four years and two failed votes, illustrating boutique collective-sale risk
- Single MRT line — Kovan MRT is North-East Line only; no Circle or East-West Line access without ~1.5km walk to Serangoon
- Thin PSF data — only a handful of resale caveats over 30 years; price discovery heavily dependent on comparable boutiques rather than own-project history
- No developer warranty on resale — buy-as-seen condition; full due-diligence burden on buyer
Verdict
Jansen Mansions’ investment story ends with the outcome that every boutique freehold and long-leasehold purchaser in Singapore’s private estate belt hopes for: a collective sale premium that more than compensates for years of holding in an illiquid micro-development. The S$19.1 million June 2022 transaction — at approximately S$863 psf per plot ratio — delivered average gross proceeds of S$1.59 million per household against a last-traded open-market price of under S$1 million per unit. The structural logic was visible throughout the development’s life: 999-year leasehold, prime D19 residential zoning, landed-enclave adjacency, and a small enough unit count (12) to make collective action theoretically feasible.
What the record also shows is the cost of that optionality: thin trading liquidity (very few open-market sales over a 30-year life), an MRT that was not within 500 metres of the development, facilities that stopped at covered parking, and a renovation requirement for any buyer taking on dated 1990-vintage interiors. The development was not a straightforward income-producing asset or a liquid market-rate trade. It was, by design and by circumstance, a land-banking and collective-sale play dressed in the clothes of a residential boutique.
For buyers researching the Jansen Road address today, the relevant product is Jansen House — the 21-unit, S$2,000–2,150 psf replacement development completed in 2026. That product inherits the same neighbourhood quality markers (landed enclave adjacency, Kovan MRT proximity, Chomp Chomp and NEX within 1.5 km) at a pricing level that reflects both the en-bloc land cost and the decade-long appreciation in D19 new-launch benchmarks. The original Jansen Mansions — a S$762 psf 2017 trade versus a S$2,000+ psf 2024–2026 replacement — is a case study in how Singapore’s land scarcity and 999-year leasehold tenure structure have compressed the distinction between “apartment” and “land banking” for boutique developments in established residential enclaves.
The ShiokNest composite score of 62/100 reflects the development as it existed prior to demolition: a strong neighbourhood (9.0/10) anchored by genuine enclave quality, a structurally advantageous 999-year tenure (9.5/10), and a creditable yield profile (7.5/10) tempered by thin data. MRT access at 960m (7.0/10) was adequate but not a doorstep convenience; facilities at 4.5/10 were minimal; unit layout at 7.5/10 reflected generous floor plates in a dated shell.