On-market resale residence. The asking price is indicative, quoted by the seller as of June 2026, and subject to availability. Floor placement and full details are confirmed in person.
The Monument Thong Lo
About this residence
The residence
This two-bedroom residence of 125 square metres at The Monument Thong Lo, on Thonglor, Sukhumvit 55 in central Bangkok, is offered on the resale market at ฿44,000,000 (฿352,000 per square metre), an indicative asking price gathered from the market in July 2026. Embark Estate advises buyers on this residence.
- Configuration
- 2 bedrooms
- Size
- 125 sq.m
- Asking price
- ฿44,000,000
- Price per sq.m
- ฿352,000
- Tenure
- Freehold
- Status
- On the market, July 2026
The building
The Monument Thong Lo stands on Soi Sukhumvit 55 (Thonglor), developed by Sansiri and designed by Quintrix Architects. It is a 45-floor tower with 127 residences, completed in 2019 under Sansiri's Luxury Collection and its Luxury is Space concept. A maximum of four homes per floor, each reached by a private lift, gives the building a low density that is unusual for Thonglor. Units are large, running from two-bedroom layouts of about 1,337 square feet to penthouses above 5,000 square feet.
The building is freehold, which means outright ownership that passes to heirs rather than a lease that has to be renewed. Foreign buyers can hold freehold units within the foreign quota, which Thai law sets at 49 percent of a building's total saleable floor area, and Embark confirms a unit's quota status at inquiry.
See the full projectKey facts
The neighbourhood
The Lumphini park-axis runs from Wireless Road through Langsuan and Tonson to Ratchadamri, anchored by the city's largest central park and traced by an MRT-BTS interchange.
Lumphini park-axisCommon questions
Is The Monument Thong Lo freehold or leasehold?
It is freehold. Foreign buyers can hold freehold units within the foreign quota, which Thai law sets at 49 percent of a building's total saleable floor area, and Embark confirms a unit's quota status at inquiry.
Who is the developer?
The Monument Thong Lo was developed by Sansiri, with architecture by Quintrix Architects. It forms part of Sansiri's Luxury Collection.
When was it completed, and how big is it?
The building was completed in 2019. It is a single 45-floor tower with 127 residences, with a maximum of four homes per floor and large units served by private lifts.
How does Embark help with a purchase here?
The Monument Thong Lo is available through our developer network. Embark advises on resale and rental here, sourcing available residences and confirming foreign-quota status and current pricing privately, on request. Reach out to start a private conversation about availability.
Inquire about this residence
A 2-bedroom residence of about 125 square metres at The Monument Thong Lo, on the market at ฿44,000,000 (฿352,000 per square metre). Reply to arrange a viewing, or to confirm floor placement and full details in person.
We respond within 4 hours in working hours. Viewings by appointment, in person or live on a video call from anywhere.
Branded residences and individual luxury units across the Lumphini park-axis, Sukhumvit corridor, and Riverside.
Principal-led. A small number of buyers at any given time. A short call first; viewings only after priorities are clear.
High-volume listings, sales pressure, and pushing a unit when another residence fits the buyer better.
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