Union Building
Union Building is a commercial building in District 2 · Downtown Core, on land zoned COMMERCIAL under the URA Master Plan with a gross plot ratio of 5.6. It is freehold. 26 transactions are on record since 1995, at a median S$1,180 psf, most recently in Jan 2026. 13 units are currently listed for sale or rent. ACRA records 287 live company registrations at this address.
What are the key facts about Union Building?
- Asset class
- Commercial
- Land-use zone
- COMMERCIAL
- Gross plot ratio
- 5.6
- Tenure
- Freehold
- District / Area
- District 2 · Downtown Core
- Address
- 171 Tras Street
- Land area
- 679 sqm
- Completed
- Not on record
- Storeys
- Not on record
- Strata units (MCST)
- 35
- Managing agent
- LANDSFIELD PROPERTY MANAGEMENT PTE LTD
- Strata formed
- 1973 (MCST 0219)
- Submarket
- Shenton Way / Tanjong Pagar
- Units with a recorded sale
- At least 14
- Listed as
- Office
- Transactions on record
- 26 (records start 1995)
- Live listings
- 13
- ACRA registrations
- 287
About Union Building
Union Building is a commercial building in Downtown Core (District 02). It is located along Tras Street, Singapore 079025.
Under the URA Master Plan it sits on land zoned commercial with a gross plot ratio of 5.6. It lies inside the Central Area.
The site is freehold. It occupies roughly 679 sqm of land with about 3,805 sqm of gross floor area.
26 transactions have been recorded here, at a median of S$1,180 psf. The most recent was in January 2026.
268 businesses are currently registered at this address with ACRA.
The nearest MRT is Tanjong Pagar MRT, 308 m away (about a 5-minute walk). The closest bus stop (The Amara) is 87 m away (about a 1-minute walk). 100 Am is 68 m away (about a 1-minute walk).
What is Union Building zoned as?
- Land-use zone
- COMMERCIAL
- Gross plot ratio
- 5.6
- Urban design area
- Udga
- Central Area
- Yes
What has Union Building sold for?
| Date | Use | Price | Area | PSF |
|---|---|---|---|---|
| Jan 2026 | Office | S$2.10M | 926 sqft | $2,269 |
| Apr 2021 | Office | S$1.45M | 710 sqft | $2,041 |
| Oct 2018 | Office | S$3.45M | 1,991 sqft | $1,733 |
| Sept 2018 | Office | S$786k | 388 sqft | $2,028 |
| Apr 2016 | Office | S$1.20M | 635 sqft | $1,886 |
| Mar 2015 | Office | S$1.60M | 926 sqft | $1,728 |
| Mar 2012 | Office | S$1.49M | 926 sqft | $1,610 |
| Mar 2012 | Office | S$1.55M | 947 sqft | $1,636 |
| Oct 2011 | Office | S$700k | 388 sqft | $1,806 |
| Sept 2009 | Office | S$693k | 667 sqft | $1,038 |
URA/JTC records from 1995 — that is where the record starts, not when the building was built. Strata and land deals can mix in one building's history; compare like with like. sqm ↔ sq ft converter
What does space at Union Building rent for?
Office space on Tras Street
Street level · 2026Q3S$ per sq ft per month · median +4.2% on a year earlier
URA's percentiles of OFFICE rents across every lease stamped with IRAS on this STREET in the quarter — the street's figure, not this building's rent and never a unit's. URA publishes a median only where the street has at least 2 office buildings and 3 contracts that quarter (percentiles need 4); a blank means below that threshold, not zero.
Source: URA rental statistics by street (IRAS-stamped contracts).
Retail space on Tras Street
Street level · 2025Q3S$ per sq ft per month (median only published) · median +20% on a year earlier
URA's percentiles of RETAIL rents (shop, F&B, entertainment, health & fitness) across every lease stamped with IRAS on this STREET in the quarter — the street's figure, not this building's rent and never a unit's. Retail rent swings with floor and frontage, so the spread matters as much as the median. A median needs at least 2 buildings and 3 contracts (percentiles need 4); a blank means below that threshold, not zero.
Source: URA rental statistics by street (IRAS-stamped contracts).
Retail space — District 2 retail
Region band · 2026Q3S$ per sq ft per month
A REGION BAND — URA's grid for the whole district or location, not this street or building. Say "across <district/location>, …", never that this building rents for it. The middle of URA's retail grid for District 2 across every floor and size band — a ground-floor shop and an upper-floor unit sit at very different points in it.
Source: URA REALIS retail rental analysis (district × floor × size grid).
Market context around Union Building
- Islandwide: Vacancy 5%
- Islandwide (Grade B): Rent S$8.35 psf/mth
- Shenton Way / Tanjong Pagar: Rent S$11.02 psf/mth · Vacancy 9.6% · Planned / under construction 1.64m sq ft
Official series (URA, 2026Q3): Office vacancy rate (Whole Island) 10 (-1.2 pp on the year) · Office rental index (Central Region) 203.4 (+1.8% on the year).
Brokers draw submarkets and grades differently; each figure is the broker's own, for its own area, cited to its report. Rents are per square foot per month.
How fast units move at Union Building
Rent: between 6 Aug 2026 and 28 Aug 2026, 4 new listings appeared and 0 came off (sold, let or withdrawn). Days on market: not enough history yet — we began tracking on 6 Aug 2026.
Sale: between 6 Aug 2026 and 28 Aug 2026, 1 new listing appeared and 0 came off (sold, let or withdrawn). Days on market: not enough history yet — we began tracking on 6 Aug 2026.
One count per unit, however many agents list it. Asking prices are not tracked over time, so price cuts are not shown.
What's been approved at Union Building?
- 17 Apr 2019Agency worksFloor 3Change of use to commercial school
Lodgment for proposed use of unit #03-XX as commercial school
- 30 Sept 2010ApprovedFloor 1Change of use: office/commercial school → health centre with ancillary beauty training centre
Proposed change of use of unit #01-XX from office/commercial school to health centre with ancillary beauty training centre
Source: URA planning decisions (URA Data Service), matched to this building by address or land lot. A past approval can lapse (a temporary permission) and belongs to the unit it names. The authoritative approved use of a unit comes from URA's Enquiry on Approved Use of Premises (S$54.50 per unit).
How does Tras Street price?
Too few strata sales on this street to support a median — the count is shown without one.
Street figures cover strata deals only — land and strata PSF are not comparable.
What do commercial rents run near Union Building?
Indicative area yield — District 2 retail
An INDICATIVE AREA yield for District 2 retail — NOT this building's yield, and not any unit's. Commercial rents are published as a district percentile grid, so both halves describe the district.
Priced on STRATA sales only: rent is quoted per unit of lettable area, and commercial land PSF runs far above strata — mixing them would shift the ratio sharply.
Net deducts the 10% non-residential property tax ONLY — not vacancy, maintenance, agent fees, financing, or the 9% GST on purchase.
Retail rents — District 2 ($ psm/month, 2026Q3)
| Floor level · size band | 25th pct | Median | 75th pct |
|---|---|---|---|
| Level 2 & 3 · 30 & Below | $92.88 | $96.94 | $102.26 |
| Level 1 · 30 & Below | $110.68 | $117.65 | $134.18 |
| Level 1 · >30 - 100 | $80.88 | $88.43 | $172.22 |
| Level 2 & 3 · >30 - 100 | $86.12 | $91.49 | $91.50 |
| B1 & Below · >30 - 100 | $247.81 | $267.74 | $283.87 |
| Level 4 & Above · >30 - 100 | $80.14 | $84.93 | $88.40 |
| Level 2 & 3 · >100 - 300 | $82.62 | $95.80 | $112.75 |
| Level 1 · >100 - 300 | $28.40 | $52.68 | $96.53 |
Office rents — Central Area ($ psm/month, 2026Q3)
| Building class · size band | 25th pct | Median | 75th pct |
|---|---|---|---|
| Category 2 · 100 & Below | $54.65 | $69.39 | $88.80 |
| Category 1 · 100 & Below | $103.62 | $122.24 | $132.43 |
| Category 1 · >100 - 200 | $116.28 | $126.99 | $148.35 |
| Category 2 · >100 - 200 | $65.57 | $82.87 | $97.63 |
| Category 1 · >200 - 500 | $114.67 | $128.09 | $145.77 |
| Category 2 · >200 - 500 | $64.83 | $82.57 | $94.73 |
| Category 1 · >500 - 1000 | $106.56 | $137.78 | $148.23 |
| Category 2 · >500 - 1000 | $85.04 | $89.34 | $109.80 |
URA REALIS rental-contract percentiles for the district/location — an area benchmark, not this building's own rents. Office and retail are dimensioned differently and are never mixed.
What is available at Union Building right now?
For sale (2)
- Union BuildingS$3k · 500 sqft
- Union Building2 agentsS$2.50M · 926 sqft
For rent (11)
- Union BuildingS$3k/mo · 550 sqft
- Union BuildingS$3k/mo · 550 sqft
- Union BuildingS$2k/mo · 400 sqft
- Union BuildingS$3k/mo · 550 sqft
What is near Union Building?
Getting around
- Tanjong Pagar MRT308 m · ~5 min
Amenities nearby
Straight-line distances. Source: PropKaki amenities data.
Getting there and parking at Union Building
nearest MRT/LRT Tanjong Pagar (EW15) 239 m, about 85,000 taps a weekday; 6 more stations within 1 km; bus stops within 400 m: 13, about 14,000 taps a weekday; Downtown Core: 284,004 resident workers (Census 2020, by workplace); about 17,000 residents within 1 km (June 2026). Ranked against 485 office buildings by PropKaki's model: a relative score, not a footfall count.
A relative score from PropKaki's model (station and bus taps nearby, workers and residents around), not a count of people.
Stations within 1 km
- Tanjong Pagar (EW15)239 m · about 85,000 weekday taps
- Prince Edward Road (CC32)242 m · 3,673 weekday taps
- Cantonment (CC31)611 m · 3,987 weekday taps
- Maxwell (TE18)648 m · about 23,000 weekday taps
- Outram Park (EW16 / NE3 / TE17)698 m · about 78,000 weekday taps
Taps are fare-card taps in and out at the station's gates on an average weekday (Jul 2026 to Sep 2026) — people passing through, not visitors to Union Building. Transfers between lines don't tap, so interchanges read low.
Bus
13 bus stops within 400 m, with about 14,000 boardings and alightings on an average weekday.
Public car parks within 500 m
- Blk 1/6 Tanjong Pagar Mscp (HDB)214 mS$1.20 per half-hour at midday on a weekday · gantry 1.8 m · 384 car lots
- Mistri Rd (URA)237 m
- Wallich St (URA)277 mS$1.20 per half-hour at midday on a weekday · 9 car lots
- Yan Kit Rd - Cantonmen T Rd Off St (URA)278 mS$1.20 per half-hour at midday on a weekday · 15 car lots
- Blk 5/7 Tanjong Pagar (HDB)291 mno short-term parking · gantry 4.4 m · 18 car lots
HDB season (car): Tier 1 $110/month (a resident's or registered HDB shop/industrial tenant's first car); Tier 2 (other cars, non-residents) $120 Rest of Island, $170 Designated Area, $190 Restricted Zone (sheltered: multi-storey, basement, deck). Industrial-park multi-storey car parks: $110 / $120. Which zone this car park is in is not published as data.
Nearest URA season parking: Blair Road-Everton Roa D Area, 810 m away, S$80/month.
Public car parks only, by straight-line distance, with the operator's published rates. Union Building's own car park, if it has one, and its charges are not in the open data.
Who's registered at Union Building?
- Financial and insurance80
- Professional, scientific and technical services65
- Wholesale and retail trade50
- Transportation and storage26
- Information and communications13
- Accommodation and food services9
- Health and social services9
- Administrative and support services8
- Construction8
- Education7
Registered businesses, not who occupies the space: companies, LLPs and branches whose REGISTERED address is this building (ACRA), by industry. Sole proprietors are not counted; no business is named. ACRA, as of 2026-09-16.
What is Union Building's BCA building profile?
- BCA building type
- Office
- Green Mark
- NA (NA)
- Energy use intensity
- 604 kWh/m²·yr
Frequently asked questions about Union Building
Where is Union Building?⌄
Union Building is at 171 Tras Street, Singapore 079025, in the Downtown Core planning area.
What is Union Building zoned as?⌄
Union Building sits on land zoned commercial under the URA Master Plan, with a gross plot ratio of 5.6.
What is the tenure of Union Building?⌄
Union Building is freehold.
What have units at Union Building sold for?⌄
Across 26 recorded transactions, the median price is S$1,180 psf. The latest was in January 2026.
What is the nearest MRT station to Union Building?⌄
Tanjong Pagar MRT is the closest, 308 m away (about a 5-minute walk).
How many businesses are registered at Union Building?⌄
268 businesses are currently registered at this address with ACRA. That is a measure of registered addresses, not of how many businesses physically occupy the building.
The facts are here — now get the verdict on Union Building.
Ask what a unit here would fetch, what the zone allows, or how it compares.
PropKakiHere's the building's zone, its recorded deals and every live unit — and where the asking prices sit against them.