Overview
Onyx Phaholyothin is a landmark project by Sansiri that redefined the Saphan Khwai skyline upon its completion in 2012. Standing 26 storeys tall with a bold, modern geometric facade, it was one of the first high-end condominiums to bridge the gap between the hip neighborhood of Ari and the bustle of Chatuchak.
The project is famous for its Duplex Units (a rarity in this area at this price point) and its "Live with Passion" concept. Strategically located just 250 meters from BTS Saphan Khwai, it offers residents the convenience of a hypermarket (Big C) and a top-tier hospital (Paolo Memorial) virtually next door. While it is technically in Saphan Khwai, it attracts many tenants who work in Ari but prefer the lower rental rates and proximity to everyday amenities found here.
Developer
Sansiri PCL is one of Thailand's top developers, known for their lifestyle-driven branding and high maintenance standards. Even over a decade after completion, Onyx Phaholyothin remains in excellent condition due to Sansiri's dedicated property management arm (Plus Property), which ensures the common areas and gardens are meticulously manicured.
Location & Transit
| Station | Line | Distance | Mode |
|---|---|---|---|
| BTS Saphan Khwai | Sukhumvit | 250m | Walk (3 min) |
| Big C Saphan Khwai | Retail | 150m | Walk (2 min) |
| Paolo Hospital | Hospital | 200m | Walk (3 min) |
Commute Logistics:
- Walk: The walk to BTS Saphan Khwai is short, safe, and well-lit, taking less than 5 minutes.
- Car: The location on the main Phahonyothin Road is convenient for accessing the Rama 6 Expressway via Pradiphat Road.
- Shortcuts: Residents can utilize Sutthisan Road nearby to cut across to Vibhavadi Rangsit Road, avoiding the main Phahonyothin traffic jams during peak hours.
Nearby Landmarks
| Place | Distance | Type |
|---|---|---|
| Big C Saphan Khwai | 150m | Large supermarket and food court practically next door |
| Paolo Memorial Hospital | 200m | A major private hospital; a huge driver for tenant demand |
| Chatuchak Market | 1.0km | World-famous market, reachable by a short walk or 1 BTS stop |
| Central Ladprao | 2.5km | Major shopping mall accessible via BTS (2 stops) |
Building Facts
| Developer | Sansiri PCL |
| Completed | 2012 |
| Floors | 26 (Single Tower) |
| Units | 620 |
| Ownership | Freehold |
Unit Types
| Type | Size | Notes |
|---|---|---|
| Studio | 25.0 – 25.5 sqm | Entry Level. Compact but functional, featuring Sansiri's efficient layout design. |
| 1 Bedroom | 29.5 – 41.0 sqm | Standard Unit. The 30-35 sqm units are the most common rental type. |
| 1 Bed Duplex | 25.0 – 67.5 sqm | Signature Unit. Features high ceilings (approx 5.8m) with a loft bedroom, offering a unique "New York Loft" vibe. |
Interior Note: The Duplex Units are the highlight of this building. They offer double-height windows that flood the room with natural light and provide dramatic city views. The finishing materials are modern, with engineered wood floors and built-in kitchens that have aged well.
Facilities
Infinity Edge Pool: A stylish pool located on the facilities floor, offering views of the cityscape.
Serrano Lounge: A signature Sansiri common area designed for relaxing or working, featuring vibrant decor.
Sky Garden: A rooftop green space that provides a quiet escape from the busy streets below.
Pros
- Location — 250m to BTS and 150m to Big C is the ultimate convenience package
- Duplex Units — Unique loft layouts that are hard to find in competing buildings
- Maintenance — Sansiri's management keeps the building feeling premium and well-kept
- Healthcare Access — Being next to Paolo Hospital makes it ideal for medical professionals
Cons
- Density — With 620 units, the elevator wait times can be noticeable during rush hour
- Traffic Noise — Units facing the main Phahonyothin Road can experience road noise
- Competition — Newer condos in the area (like The Line) offer more modern facilities, though at a higher price
The Bottom Line
In 2026, Onyx Phaholyothin remains the "Stylish Value Choice" of Saphan Khwai. It is the perfect home for doctors, nurses, or young creatives who want a branded condo with character (especially the duplexes) without paying the premium prices of Ari. If you value having a supermarket and BTS station within a 3-minute walk, this is one of the most practical options in the district.
Last verified: January 11, 2026. Data sourced from Sansiri official records and physical site audit.