The Waterford Diamond Tower

The Waterford Diamond Tower is a high-rise condominium located at 758 Soi Sukhumvit 30/1, Khlong Tan, Khlong Toei, Bangkok 10110. The project is positioned in the Phrom Phong area, one of Sukhumvit’s established residential neighborhoods, and is approximately 550 meters from BTS Phrom Phong Station. Nearby landmarks include Emporium, EmQuartier, Benchasiri Park, and a wide range of dining and lifestyle destinations.

Completed in 1999, the project was developed by Waterford Property Co., Ltd. It consists of 1 residential building with 46 floors and around 538 units, with parking provided for residents. Unit types include 1-bedroom, 2-bedroom, 3-bedroom, and penthouse layouts. Room sizes are generally larger than many newer condominiums in the same area, making the project suitable for both owner-occupiers and rental demand, especially among expatriates working along Sukhumvit.

Facilities include a swimming pool, fitness center, tennis court, garden, playground, passenger lifts, and common areas designed for daily living. Security features include 24-hour security guards, CCTV, and key card access. Overall, this is a well-known large-scale condominium in the Phrom Phong area with long-term residential appeal and convenient city access.

The property is managed by the condominium juristic person, which oversees common area maintenance and day-to-day management. For a nearby project in another prime lifestyle location, see Ivy Thonglor.

The Waterford Diamond Tower (Sukhumvit 30/1, Khlong Tan-Khlong Toei) shows a 2026 market profile typical of a lived-in condominium near Phrom Phong. Connectivity remains a key driver: BTS Phrom Phong is about 900 m away, supporting steady rental demand from office workers and expatriates. Versus nearby projects such as Ivy Thonglor and Culture Thonglor, this building generally competes with a more accessible price per sq.m., while unit condition and renovation quality strongly influence liquidity.

• Resale price per unit (1-bed, 45 sq.m.): THB 4.95M
• Average price: ~THB 110,000 per sq.m.
• Average rent: ~THB 22,000 per month

Rental Yield (quick math): (22,000 x 12) divided by 4,950,000 = 5.33% per year (before common fees, taxes, and vacancy). Assuming total running costs of ~10% of rent, net yield trends closer to ~4.8%.

Capital Gain view: With a lower entry price than many newer Thonglor-Phrom Phong launches, upside is usually gradual rather than explosive. A reasonable base case is 2-4% annual price growth over 2026-2028 for well-maintained or renovated units with stable tenancy. Key risk is resale competition from abundant mid-Sukhumvit secondary stock, making “renovated, correctly priced” units materially more liquid than the general pool.