Projects · Tonson One
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Tonson One Residence is a freehold condominium on the Lumphini park-axis at Tonson in Bangkok, developed by Asset Five Group, a low-density 29-floor tower of around 80 residences completed in 2023.
The essentials.
What does a residence at Tonson One cost?
Asking prices observed July 2026 · See every current listing
Indicative resale and rental observations gathered from the market. Embark advises on the buyer side. Exact floor, price, and availability are confirmed in person.
On the market at Tonson One
The residences currently on the market, gathered in one register. Embark advises on the buyer side.
One-bedroom residences3 on the market57–67 sq.mFrom฿21MView 3
Two-bedroom residences9 on the market106–118 sq.mFrom฿41MView 9
Embark’s pick · Available3-bedroom residence฿150,000,000rent ฿380,000 / moView 1
TSO-S09฿21MTSO-S13฿25.79MTSO-S06฿26MTSO-S07฿41MTSO-S12฿47.9MTSO-S10฿48MTSO-S03฿48.3M3-bedroom residence฿150MTSO-S02฿80MIndicative resale observations gathered from the market. Embark advises on the buyer side. Exact floor, price, and availability are confirmed in person.
One-bedroom residences2 on the market57–60 sq.mFrom฿60K/ monthView 2
Two-bedroom residences4 on the market100–108 sq.mFrom฿145K/ monthView 4
Embark’s pick · Available3-bedroom residence฿380,000 / moAlso for sale ฿150,000,000
Embark’s pick · Available to rent3-bedroom residence฿230,000 / moTSO-R06฿60K/ monthTSO-R02฿85K/ monthTSO-R04฿145K/ monthTSO-R05฿149K/ monthTSO-R01฿160K/ monthTSO-R03฿165K/ month3-bedroom residence฿380K/ month3-bedroom residence฿230K/ monthIndicative asking rents gathered from the market. Embark advises on the buyer side. Terms and availability are confirmed in person.
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The building.
Tonson One Residence stands on Soi Tonson, a quiet lane off Langsuan near Lumphini Park, developed by Asset Five Group. It is a low-density 29-floor tower with around 80 residences, completed in 2023. It is one of the newest freehold buildings on this stretch of the park-axis, where most land is leasehold.
The building is freehold, which means outright ownership that passes to heirs rather than a lease that has to be renewed.
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That tenure is comparatively scarce on the park-axis. Foreign buyers can hold freehold units within the foreign quota, which Thai law sets at 49 percent of a building's total saleable floor area, and Embark confirms a unit's quota status at inquiry.
With the tower recently completed, this is a resale and rental market with limited inventory.
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Embark advises buyers and tenants here as part of our coverage of the park-axis. We source available residences and confirm foreign-quota status and current pricing privately, on request.
The neighbourhood.
Six streets, four sub-markets, and one 142-acre park they all answer to.
- The parkLumphini Park is 142 acres in the middle of the city, and the corridor is named for it: the six streets around it are priced by how directly they face it.
- The streetsWireless, Langsuan, Ratchadamri, Sarasin, Chidlom and Ploenchit, and Upper Sathorn. Each trades differently, and the corridor guide takes them one at a time.
- What tradesThe densest cluster of freehold branded residences in Bangkok sits on this axis, on land where most sites are held on long lease.
Lumphini park-axisRead the neighbourhood guide 
Buyer's guideDusit Residences or Upper House Residences: the two ways to live on Lumphini Park
Market intelligenceIs SC Residence the Rosewood Residences Bangkok? What is confirmed on Rama IV
CorridorsThe best condominiums on Wireless Road, Bangkok
Buyer's guideUpper House Residences vs EI8HTEEN SEVEN: two ways to own Wireless Road
CorridorsLumphini Park front or Wireless Road: choosing your corridor
Branded residencesCapella Residences Bangkok: a wellness residence at WellEra
CorridorsThe Lumphini park-axis in mid-2026: a corridor snapshot
Branded residencesOn the front row of Lumphini Park: Upper House Residences Bangkok
Questions about this building
- What is Tonson One Residence?
Tonson One Residence is a freehold condominium on Soi Tonson, a quiet lane off Langsuan near Lumphini Park, developed by Asset Five Group: a low-density 29-floor tower completed in 2023, and one of the few freehold buildings on a stretch of the park-axis that is otherwise leasehold.
Others on the same corridor
Considering Tonson One? We will tell you honestly how it compares.
We respond within 4 hours in working hours. Viewings by appointment.
Common questions.
Is it freehold or leasehold?
Freehold. Buyers hold outright title that passes to heirs. Foreign buyers can hold freehold units within the foreign quota, which Thai law sets at 49 percent of a building's total saleable floor area, and Embark confirms a unit's quota status at inquiry.
Who is the developer?
Asset Five Group.
When was it completed, and how big is it?
Completed in 2023. It is a low-density 29-floor tower with around 80 residences.
How does Embark help with a purchase here?
Embark advises on resale and rental at Tonson One Residence as part of our coverage of the park-axis. We source available residences, confirm foreign-quota status and current pricing privately, compare against other freehold buildings nearby, and work for the buyer side.