51% below the median price/m² of 2257 comparable listings in Khlong Toei.
Based on 6 rentals in this condo, all layouts: median ฿363/m² per month × 80 m².
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}Land Office fees and taxes on top of the price. An estimate: the exact amounts are set by the Land Office on transfer day.
| Transfer fee (2 % of appraisal)· split | ฿51,520 |
| Stamp duty (0.5 %)· seller | ฿37,500 |
| Withholding income tax· seller | ฿45,080 |
| You pay on top of the price | ฿25,760 |
| All-in for the buyer | ฿7,525,760 |
| Seller's taxes and fees | ฿108,340 |
No fee relief: it needs price, appraisal and loan ≤ ฿7M.Taxes are the seller's by custom, but it's negotiable: some sellers ask for a price "net" of fees.Individual sellers: on the appraisal, less a deduction by years held, at progressive rates (max 20 % of the price). Companies: 1 %.Estimate for guidance only, not tax or legal advice. Rules as of September 2026.
3 sale listings in a 48-unit building
| Estimated gross rent | ฿348,000 |
| Common area fee | − ฿33,600 |
| Vacancy allowance | − ฿28,603 |
| Letting agent fee (1 month/year) | − ฿29,000 |
| Land & Building tax | − ฿515 |
| Furnishing & maintenance allowance | − ฿17,400 |
| Net annual income | ฿238,882 |
Cost of owning: ~฿2,800/mo common fee (฿35/m²/month)
Building facilities24h security · CCTV · Garden · Gym · Keycard access · Lift · Motorcycle parking · Parking · Sauna · Swimming pool
Flood risk:MediumNearest: ถนนอโศกมนตรี บริเวณหน้าตึกแกรมมี่ (flood-prone road segment) · ~575 mA BMA-documented flood-prone spot is within easy reach of this location.2 documented spots within 800 mPosition is this project's approximate location (median of nearby listings), not this exact unit.Based only on proximity to points BMA itself has flagged as flood-prone or flood-watch — not a hydrological model, and not the 2011 flood extent. A location with nothing nearby is not proven flood-safe: BMA's list covers the spots it chose to document, not a wall-to-wall survey. Source: Bangkok Metropolitan Administration, Department of Drainage and Sewerage (public map data)
8
12
10
14
7
14
11| Unit | Beds | Baths | Size | Floor | Price | Price/sqm | Posted |
|---|---|---|---|---|---|---|---|
8Siam Penthouse 1, bangkok DDproperty | 3 | 2 | 120 m² | — | ฿10,900,000 |
| ฿90,833 |
| 15 Sept 2026 |
12Siam Penthouse 1, bangkok DDproperty | 3 | 3 | 160 m² | — | ฿15,000,000,000 | ฿93,750,000 | 3 Sept 2026 |
10คอนโด 2-ห้องนอน ที่ สยาม เพนท์เฮาส์ 1 คอนโดมิเนียม ใกล้ BTS นานา PropertyScout Fully furnished · Min. lease 12 mo | 2 | 1 | 80 m² | 5 | ฿28,000/mo | ฿350 | 30 Jun 2026 |
14คอนโด 2-ห้องนอน ที่ สยาม เพนท์เฮาส์ 1 คอนโดมิเนียม ใกล้ BTS นานา PropertyScout Fully furnished · Min. lease 12 mo | 2 | 1 | 80 m² | 6 | ฿30,000/mo | ฿375 | 5 May 2026 |
7คอนโด 4-ห้องนอน ที่ สยาม เพนท์เฮาส์ 1 คอนโดมิเนียม ใกล้ BTS นานา PropertyScout Fully furnished · Min. lease 12 mo · Pets OK | 4 | 2 | 160 m² | — | ฿60,000/mo | ฿375 | 27 Aug 2024 |
![]() Siam Penthouse 1 4 bedrooms, for rent PropertyHub | 4 | 3 | 160 m² | — | ฿39,000/mo | ฿244 | 30 Jun 2023 |
14คอนโด 4-ห้องนอน ที่ สยาม เพนท์เฮาส์ 1 คอนโดมิเนียม ใกล้ BTS นานา PropertyScout Fully furnished · Min. lease 12 mo | 4 | 2 | 160 m² | 8 | ฿60,000/mo | ฿375 | 8 Jul 2022 |
11คอนโด 3-ห้องนอน ที่ สยาม เพนท์เฮาส์ 1 คอนโดมิเนียม ใกล้ BTS นานา PropertyScout Fully furnished · Min. lease 12 mo | 3 | 2 | 160 m² | 7 | ฿16,000/mo | ฿100 | 20 Feb 2022 |
| Observed at | Price |
|---|---|
| 26 Sept 2026, 20:15 | ฿7,500,000 |