Altitude Define

Altitude Define is located at 199 Si Phraya, Bang Rak, Bangkok 10500. This is a low-rise condominium in the inner-city Si Phraya - Rama 4 area, offering convenient access to Silom, Samyan, and Sathorn. The project is designed for urban residents seeking privacy and easy commuting. It is approximately 900 meters from MRT Sam Yan Station and about 1.7 kilometers from BTS Sala Daeng Station.

The project consists of 1 building, 8 floors, and around 59 residential units, with parking spaces for about 40 percent of total units. Unit types include 1-bedroom, 1-bedroom Plus, and 2-bedroom layouts. The room designs focus on practical city living, making the project suitable for both owner-occupiers and investors looking for property in a central business area.

Facilities include a lobby, swimming pool, fitness room, common relaxation area, passenger elevator, and parking area. Security features include security guards, CCTV, and key card access control. The project was completed around 2018 and developed by Altitude Development Co., Ltd. As for juristic person management, the specific management company is not clearly stated in public sources.

From a residential and investment perspective, the location stands out for its proximity to Chulalongkorn University, Samyan Mitrtown, Bangkok Christian Hospital, and the Silom - Sathorn office district. This supports both long-term living and rental demand from working professionals. For comparison with another prime city project, see Noble Ploenchit.

Altitude Define in Si Phraya, Bang Rak, tracks CBD demand from Silom-Sathorn. In 2026, pricing is expected to move gradually rather than spike, supported by office-driven rentals and limited prime land supply in inner Bangkok.

• Resale price per unit: 1-bedroom 34 sq.m. averages THB 6.3M
• Price per sq.m.: about THB 185,000 (6,300,000 - 34)
• Average rent: THB 27,000 per month for a fully furnished 1-bedroom

2026 Rental Yield (shown): Annual rent = 27,000 x 12 = THB 324,000. Gross yield = 324,000 / 6,300,000 = 0.0514, or about 5.1% per year (before common fees, tax, and vacancy).

Capital Gain view: Using a realistic market reference of ~THB 175,000 per sq.m. in 2024-2025 and ~THB 185,000 per sq.m. in 2026 implies roughly 5-6% appreciation over 1-2 years. Going forward, upside is likely moderate, with returns leaning more on stable rental cashflow than short-term speculation, especially compared with larger, more volatile CBD projects.