Royal Castle Sukhumvit 39

Royal Castle Sukhumvit 39 is a high-rise condominium located at 30 Khlong Tan Nuea, Watthana, Bangkok 10110, in Sukhumvit 39. The project sits in the Phrom Phong area, with convenient access to both Sukhumvit Road and Phetchaburi Road. It is approximately 1.1 kilometers from BTS Phrom Phong Station and close to EmQuartier, Emporium, Samitivej Sukhumvit Hospital, and many international dining spots in the neighborhood.

Completed in 1993, the project was developed by T.H.Y. Real Estate Co., Ltd. It consists of 3 residential buildings, each rising 24 floors, with around 146 units in total. Parking is provided in a relatively high ratio compared with many condominiums in the same area. Unit types mainly feature large layouts suitable for long-term living, including 2-bedroom, 3-bedroom, and some penthouse units, with spacious usable areas.

Facilities include a swimming pool, fitness center, tennis court, garden, passenger elevators, and lobby area. Security features include 24-hour security guards, CCTV, and controlled building access. The property is managed under condominium juristic person administration for common area maintenance and resident services. This project is suitable for buyers seeking large residential units in central Sukhumvit, whether for owner-occupation or rental investment targeting expatriate families.

Royal Castle Sukhumvit 39 in 2026 sits in the Phrom Phong area as a “large-unit” condominium option versus newer launches. The project is about 900 m from BTS Phrom Phong (Sukhumvit 39), so demand is driven mainly by family tenants and expatriates who prioritize space over brand-new facilities.

• Resale price per unit (2-3BR, 120-160 sq.m.): around THB 16.5-24.0M
• Average resale price: THB 145,000-165,000 per sq.m. (deals often close near THB 155,000 per sq.m.)
• Average rent: THB 65,000-95,000 per month (fully renovated larger units can reach ~THB 110,000)

Rental Yield (quick math): a 130 sq.m. unit priced at THB 20.15M (155,000 per sq.m.) rented at THB 80,000 per month gives annual rent of THB 960,000. Yield = 960,000 ÷ 20,150,000 = 4.76% per year (before common fees, taxes, and vacancy).

Capital gain view: as an older building, price growth is typically steady rather than aggressive. Upside comes from scarcity of large layouts in Phrom Phong. If bought below ~THB 150,000 per sq.m. and upgraded for immediate move-in, a realistic resale appreciation is about 2-4% per year under normal market conditions. Key risks are renovation cost and competition from newer BTS-line projects.