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, most recently in Jan 2026. 9 units are currently listed for sale or rent. ACRA records 268 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
- Transactions on record
- 26 (records start 1995)
- Live listings
- 9
- ACRA registrations
- 268
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 | $1,038 |
URA/JTC records from 1995 — that is where the record starts, not when the building was built. Strata and land deals can mix in one building's history; compare like with like.
How does Tras Street price?
Too few strata sales on this street to support a median — the count is shown without one.
Street figures cover strata deals only — land and strata PSF are not comparable.
What do commercial rents run near Union Building?
Indicative area yield — District 2 retail
An INDICATIVE AREA yield for District 2 retail — NOT this building's yield, and not any unit's. Commercial rents are published as a district percentile grid, so both halves describe the district.
Priced on STRATA sales only: rent is quoted per unit of lettable area, and commercial land PSF runs far above strata — mixing them would shift the ratio sharply.
Net deducts the 10% non-residential property tax ONLY — not vacancy, maintenance, agent fees, financing, or the 9% GST on purchase.
Retail rents — District 2 ($ psm/month, 2026Q2)
| Floor level · size band | 25th pct | Median | 75th pct |
|---|---|---|---|
| Level 1 · 30 & Below | $117.18 | $135.69 | $145.64 |
| Level 4 & Above · 30 & Below | $133.48 | $175.00 | $176.97 |
| Level 2 & 3 · 30 & Below | $88.69 | $92.35 | $103.79 |
| B1 & Below · >30 - 100 | $182.74 | $186.04 | $189.76 |
| Level 1 · >30 - 100 | $92.17 | $98.21 | $149.16 |
| Level 2 & 3 · >30 - 100 | $83.42 | $86.12 | $95.80 |
| Level 1 · >100 - 300 | $32.29 | $69.32 | $110.19 |
Office rents — Central Area ($ psm/month, 2026Q2)
| Building class · size band | 25th pct | Median | 75th pct |
|---|---|---|---|
| Category 1 · 100 & Below | $91.40 | $96.39 | $119.48 |
| Category 2 · 100 & Below | $57.98 | $71.59 | $86.82 |
| Category 1 · >100 - 200 | $113.24 | $120.54 | $144.36 |
| Category 2 · >100 - 200 | $59.40 | $77.88 | $96.88 |
| Category 2 · >200 - 500 | $69.97 | $89.34 | $97.94 |
| Category 1 · >200 - 500 | $112.64 | $129.70 | $148.82 |
| Category 1 · >500 - 1000 | $119.97 | $136.70 | $147.13 |
| Category 2 · >500 - 1000 | $55.42 | $82.91 | $92.66 |
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 (1)
- Union Building2 agentsS$2.50M · 926 sqft
For rent (8)
- Union Building10 agentsS$3k/mo · 549 sqft
- Union BuildingS$4k/mo · 550 sqft
- Union BuildingS$6k/mo · 950 sqft
- Union BuildingS$3k/mo · 500 sqft
What is near Union Building?
Getting around
- Tanjong Pagar MRT308 m · ~5 min
Amenities nearby
Straight-line distances. Source: PropKaki amenities data.
How many companies are registered at Union Building?
- Live registrations
- 268
- Registered last 3 years
- 76
- Most common type
- Local Company
Company REGISTRATIONS at this address (ACRA), not a tenancy schedule. Registration does not mean the company physically occupies space here, and a low count does not mean the building is empty. Do not describe this as occupancy or vacancy.
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.