Condo One Siam

Condo One Siam is located at 9 Kasemsan 3 Alley, Wang Mai, Pathum Wan, Bangkok 10330. The project is a high-rise condominium in the prime Siam - Pathum Wan area, surrounded by shopping centers, universities, and business facilities. It is approximately 350 meters from BTS National Stadium and about 900 meters from BTS Siam, offering convenient access across central Bangkok.

The project was developed by Plus Property Partner Co., Ltd. It consists of 1 residential building with 8 floors and around 79 units, with on-site parking available for residents. Unit types mainly include studio, 1-bedroom, and 2-bedroom layouts, suitable for both owner-occupiers and rental demand in the city center.

Facilities include a swimming pool, fitness room, passenger elevators, common area, and parking spaces. Security features include 24-hour security guards, key card access, and CCTV. The project was completed around 2006 and is managed by the juristic management team for ongoing building maintenance. Its key advantage is a private residential setting within Kasemsan Soi, while remaining close to Siam Square, MBK Center, Chulalongkorn University, and Rama I Road, making it attractive for both living and long-term investment.

Condo One Siam (Kasemsan 3, Pathumwan) remains a core CBD-fringe asset in 2026, supported by Siam-Pathumwan offices, universities, and retail. The nearest rail link is BTS National Stadium, approx. 450 m away, which helps maintain leasing demand from professionals and students.

• Resale price per unit (1-bed, 45 sq.m.): ~THB 6.3M
• Average resale price: ~THB 140,000 per sq.m.
• Average rent: ~THB 26,000 per month (1-bed)

Rental Yield (simplified): (26,000 x 12) - 6.3M = 312,000 - 6,300,000 = 4.95% per year (before common fees, taxes, and vacancy). This is a reasonable level for inner-city condos; compared with nearby prime alternatives such as Villa Rachatewi, pricing per sq.m. can be higher while yields tend to stay in a similar band.

Capital Gain view: using a conservative inner-Pathumwan growth assumption of 2-4% yearly, the achievable resale range could move toward ~THB 150,000-155,000 per sq.m. over the next 12-18 months. Upside drivers are stable rental absorption and limited truly walkable stock to the Siam core; risks include competing rental supply and price-sensitive tenants, which can cap rent growth even if sale prices rise.