Bangkok
, Sathorn
, Thailand
The Monument Sathon
Complex Characteristics
Residential Complex Description
The Monument Sathon, developed by Sansiri in partnership with Nomura Real Estate, is being built on a quiet lane, Sathon Soi 10, in Bangkok's business district. Year of completion is planned for Q1 2030. The tower has 29 floors and only 185 apartments in total, so there are between 5 and 12 apartments on each floor.
1 tower, 29 floors, 185 apartments
Apartments from 39 to 303 m²: 1-bedroom, 2- and 3-bedroom units, penthouses
Parking at 102% of the number of apartments
Freehold, with a foreign quota
The grounds include around 1,600 m² of greenery: a rooftop garden on The Canopy with a vegetable garden, a courtyard at the entrance and the Garden Lounge. On floors 25 and 27 there is a swimming pool with an infinity edge, an onsen, a hydro-massage pool, a jacuzzi, a gym and a Pilates studio. For pets, the Sansiri Paw & Co. club offers an exercise garden and grooming.
The project is 80 metres from BTS Saint Louis and around 260 metres from BTS Chong Nonsi. Within a one-kilometre radius there are three private hospitals, and the international school St. Andrews Sathorn is 950 metres away. Lumpini Park is 1.8 km away.
For investors, the project is of interest because of its location and format:
Offices, embassies and hospitals nearby create rental demand from senior managers and expat families
Low-density development and parking exceeding the number of apartments are rare in Sathon
Purchase during construction: 30% on signing, 70% on handover
Complex InfrastructureComplex Infrastructure
Swimming pool
Library
Children's playground
Jacuzzi
Gated community
Charging station for electric vehicles
Club kitchen
Onsen
Animal Walking Park
Parking
Terrace on the roof
Fitness
Project Gallery
Developer
Sansiri is one of Thailand's largest and most established developers, whose projects can be confidently recommended to clients.
Sansiri Public Company Limited was founded in 1984 and has been among the country's leading developers for approximately 40 years. It is listed on the Thailand Stock Exchange (SET: SIRI), headquartered in Bangkok, and operates nationwide, developing condominiums, houses and townhouses.
Scale and figures
Founded: 1984.
Public status: SET listing since 1996.
Portfolio: hundreds of completed projects and tens of thousands of units; by the 2010s already 237 projects and over 60,000 properties across 9 provinces and one project in London.
2025: No. 1 in Thailand by number of new units launched — 1,847 units (approximately 12% of all launches in Bangkok and surrounding areas within the half-year period).
Plan for 2026: 30+ new projects with a combined value exceeding THB 50 billion, target sales of THB 48–53 billion, transfers of THB 39–46 billion.
Geography
Sansiri is particularly strong in:
Bangkok and its metropolitan area (urban condominiums and residential complexes).
Major tourist provinces (resort condominiums and complexes).
On Phuket, Sansiri is developing resort projects, one of which is RHEA by Sansiri in Cherng Talay, between Surin and Bang Tao beaches.
Developer approach and strengths
Sansiri positions itself as a full-service developer based on:
Property development — development of residential properties across different segments.
Property services — property management, brokerage, rental.
Hotel management and associated services.
Sansiri is one of few developers whose projects participate in official long-term investment and long-stay visa programmes for foreign buyers. Upon purchasing a condominium unit valued at THB 3 million and above and meeting immigration requirements, the owner gains the right to apply for an annual investor visa with renewal options, as well as to arrange residency status for family members.
In a number of pilot programmes launched on Phuket, Sansiri projects (including Rhea by Sansiri) are used as base properties for arranging such visas, and the developer, working with partners, assists owners with document preparation and submission.
Why we confidently recommend Sansiri to our clients
Nearly 40 years in the market and public status — transparent reporting, regular filings and investor oversight.
Strong track record — hundreds of completed projects, tens of thousands of handed-over units, leadership in number of launches and sales volume.
Experience in resort regions — not only Bangkok but major tourist destinations, including Phuket and projects such as RHEA by Sansiri.
Full range of services for owners — development, property management, rental and resident services, which is particularly important for foreign buyers.
Financial stability and growth plans — revenue exceeding $1.1 billion, profit around $170 million and dozens of new projects annually.
Through scale, experience and service quality, Sansiri logically belongs on the shortlist of developers that the agency can confidently recommend to clients considering property purchase in Thailand and Phuket.
