The Address Siam-Ratchathewi

The Address Siam-Ratchathewi is a high-rise condominium located at 111 Phetchaburi Road, Thanon Phaya Thai, Ratchathewi, Bangkok 10400. The project sits in a prime central Bangkok location near Siam and Ratchathewi, with convenient access to BTS Ratchathewi Station at around 150 meters and Phaya Thai Airport Rail Link Station at approximately 600 meters.

Developed by AP Thailand Public Company Limited, the project was completed in 2012. It consists of 1 residential tower with 50 floors and a total of 880 units, with parking spaces for about 60% of the total units. Unit types include 1-bedroom, 2-bedroom, and penthouse layouts, with starting sizes of around 35 square meters, making it suitable for both owner-occupiers and investors seeking rental demand in the city center.

Facilities include a lobby, swimming pool, fitness center, sauna, garden, library, and common areas for relaxation. The security system features 24-hour security guards, CCTV, key card access, and controlled building access.

The project is managed through the condominium juristic person to ensure proper maintenance and organized common area management. Its location is well suited for residents who want to stay close to workplaces, educational institutions, and major shopping destinations such as Siam Paragon, MBK Center, and Platinum Fashion Mall. For buyers looking for a condominium in a central urban location, this project stands out for both residential convenience and long-term value potential.

The Address Siam-Ratchathewi in 2026 trades within Bangkok’s inner-CBD corridor where rental demand is supported by office workers around Ratchaprasong and Siam, plus students. Accessibility is a key value driver: BTS Ratchathewi is about 450 m away and BTS Phaya Thai about 900 m, helping prices stay resilient versus outer zones. However, nearby alternatives such as Wish Signature Midtown Siam and The Address Phaya Thai increase negotiation pressure, especially for standard 1-bedroom layouts.

• Resale price per unit: 1-bed 45 sq.m averages THB 8.1M
• Price per sq.m: ~THB 180,000 (commonly seen range THB 165,000-200,000)
• Average rent: 1-bed 45 sq.m ~THB 30,000 per month

Rental Yield (with a simple calculation): (30,000 x 12) minus 5% vacancy = THB 342,000 net rent per year. Yield = 342,000 / 8,100,000 ≈ 4.2% per year. This level is attractive for investors prioritizing stable tenants and liquidity in a central location rather than maximum yield.

Capital Gain outlook: Using a conservative appreciation assumption of 2.5% per year, an average of THB 180,000 per sq.m could reach ~THB 194,000 per sq.m in three years, implying roughly 7.7% capital gain. Upside is supported by inner-CBD scarcity and transit convenience, while downside risk comes from competing rental supply in the Siam-Phaya Thai area and higher buyer sensitivity to pricing.