The Quarter Onnut by UHG — 4-Star Rooftop Pool in Bangkok's Relaxed On Nut-Phra Khanong Neighbourhood
If you want a 4-star hotel on Bangkok's Sukhumvit strip without paying central-district prices, The Quarter Onnut by UHG is a name that keeps coming up among guests who know the area well. Sitting at the mouth of Sukhumvit Soi 58 inside the Sukhumvit Hills development in Phra Khanong, this hotel opened in 2021 with 88 rooms, a rooftop outdoor pool with proper Bangkok skyline views, a modern gym, and a restaurant serving buffet breakfast. It sits roughly midway between BTS On Nut and BTS Bang Chak — about a 10-minute walk to either. Rates start from approximately ฿1,200/night, with a score of 8.6 from 403 reviews on Trip.com.
The Quarter Onnut by UHG is the hotel component of the Sukhumvit Hills mixed-use development that launched in 2021. The project brought a fresh 4-star property to a corner of Sukhumvit that's long been favoured by Bangkok expats and younger travellers who want access to the city's BTS network without paying the premium of Thonglor or Asok. Phra Khanong is genuinely local — lower prices, street food a few steps away, and a real neighbourhood feel that fades somewhere around Sukhumvit 40 heading inward.
The 88 rooms span four categories: Superior Twin and Superior King (21–27 sqm), the standard entry-level options; Deluxe Room (35 sqm), a noticeably more comfortable step up; and a Family Suite with two bedrooms for groups or families. All rooms include minibar, in-room safe, air conditioning, Smart TV, and complimentary Wi-Fi. The interior fit-out is clean and contemporary — no heritage character, no gimmicks — but the build quality is what you'd hope for from a 2021 opening.
"Rooftop pool with a great city view. Room spotless, staff genuinely helpful. For this price in On Nut you're not going to find a 4-star with a rooftop pool like this anywhere else."
The rooftop outdoor pool is the property's headline feature, and guest reviews back it up. The Bangkok skyline view is unobstructed — good at sunset, dramatic at night. The fitness centre on the same level uses up-to-date equipment, a benefit of the hotel being newly built rather than renovated. The hotel's restaurant opens daily for a buffet breakfast offering Thai, Chinese, and American selections at an additional ฿209 per adult (children under six free).
The On Nut–Phra Khanong neighbourhood brings its own appeal as well. W District, the outdoor bar and street food complex that draws Bangkok's night-out crowd, is a short Grab ride away. Habito Mall and Summer Hill — two of the city's most popular hangout spots for independent cafes and weekend brunches — are nearby. The Big C on On Nut road covers supermarket needs. For shopping or nightlife that requires the full Sukhumvit experience, the BTS ride from On Nut to Siam takes under 20 minutes.
What to know going in: several reviews flag noise from the BTS elevated track and Sukhumvit Road, particularly in rooms facing the main road. It's the kind of ambient city noise that doesn't bother most urban travellers but can disturb light sleepers — request an inner-facing or soi-facing room when checking in. Some reviews also mention inconsistent hot water pressure during peak evening hours, and the 760-metre walk to BTS On Nut — comfortable in good weather, a slight inconvenience if it's raining without a Grab in sight.
The overall picture from real guest reviews is positive: The Quarter Onnut by UHG delivers value that's hard to match at the 4-star level in this neighbourhood. A rooftop pool, proper gym, good service, and a 2021 build quality — all at rates that sit well below comparable properties in Thonglor or Asok. TripAdvisor ranks it #113 of 1,384 Bangkok hotels, which for a three-year-old property in a quieter district is a genuine achievement.
Summary from Booking & Agoda
- ✓ Rooftop pool with skyline views is the standout feature — every guest mentions it
- ✓ Rooms are clean, modern, and well-maintained for a new property
- ✓ Staff consistently praised across all platforms for friendliness and responsiveness
- ✓ Excellent value at the 4-star level for this neighbourhood
- ! Road-facing rooms pick up BTS train and traffic noise, especially evenings
- ! Hot water pressure can be inconsistent during peak check-in hours
- ! 760m walk to BTS On Nut — no direct skywalk connection
- ✓ Phra Khanong location is quieter than central Sukhumvit but BTS is 10 minutes away
- ✓ Rooftop pool and gym are new and well-maintained — not overcrowded
- ✓ Buffet breakfast with good variety at a reasonable add-on price
- ✓ Family Suite works well for groups of 3–4 travelling together
- ! Superior rooms are on the smaller side (21–27 sqm)
- ! Limited parking — call ahead if arriving by car
- ! No 24-hour restaurant; limited late-night dining options on-site
- 💡If you need large rooms or a bathtub — Superior rooms run 21–27 sqm, which is compact → consider the Deluxe Room (35 sqm) or Family Suite if space matters to you
- 💡If you're a light sleeper — road-facing rooms can be noisy from the BTS and Sukhumvit traffic → request an inner/soi-facing room at check-in
- 💡If you need direct covered BTS access — the 760m walk to On Nut is pleasant in fine weather but requires a Grab in the rain → Cross Vibe Bangkok Sukhumvit (200m to BTS) is the better pick if station-proximity is your priority