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DDproperty

Klass SiamAll units in this condo →

Pathum Wan, Wang Mai · Google Maps

฿6,499,000฿144,422 / m²Good price19+ days listed

1 bed1 bath

฿6,499,000

฿144,422 / m²

View on DDproperty

Key facts

Price vs market

13 % below market

vs 12 similar units in this condo

Net rental yield

3.8% net yield

5.7% gross before costs

Buying costs

฿334

Thai buyer (fee relief); foreign buyer ฿66,825

Common fee

฿3,600/mo

฿80/m² per month

Could rent for

฿30,681/mo

5.7 % gross yield

Project

Klass Siam

Built

2017

Floors

Units

Building facilities24h security · CCTV · Garden · Gym · Jacuzzi · Keycard access · Library · Lift · Parking · Swimming pool

Price comparison

Good price

13% below the median price/m² of 12 comparable listings in this condo.

This listing

฿6,499,000

45 m² · ฿144,422/m²

At the median for 45 m²

฿7,465,909

฿966,909 less than the median

Typical range for this size

฿7,256,480 – ฿7,632,259

Comparables' median asking price: ฿7,750,000

Rental estimate & yield

Based on 52 rentals in this condo: median ฿682/m² per month × 45 m².

Estimated rent

฿30,681/mo

฿29,836 – ฿32,182/mo

Gross yield

5.7%

5.5% – 5.9%

Median rent of comparables

฿30,000/mo

52 rentals, any size

Rentals of similar size

฿32,000/mo·45 m²·1 bed

Location

Open in Google Maps

Flood risk:Low

Commute to business hubs

Siam
Walk 3 min → BTS National Stadium → Siam (1 stop)
~8 min
Silom
Walk 3 min → BTS National Stadium → Silom (3 stops)
~12 min
Sathorn
Walk 3 min → BTS National Stadium → Sathorn (4 stops)
~14 min
Asok / Sukhumvit
Walk 3 min → BTS National Stadium → Asok / Sukhumvit (5 stops)
~16 min
Rama 9
Walk 3 min → BTS National Stadium → MRT Sukhumvit → Rama 9 (7 stops)
~28 min

25 sale listings in a 79-unit building

Other units in Klass Siam

See all 98 in project

Similar condos nearby

More condos like this

More details

Address

Subdistrict: Wang Mai
Address: Rama I Road, Wang Mai, Pathum Wan, Bangkok
Nearest transit: 260 m (3 min) from W1 National Stadium BTS
Coordinates: 13.74821, 100.52860

Listing history

Listing ID: DDproperty #11782519
Posted at: 9 Sept 2026
First seen: 26 Sept 2026, 20:25
Last seen: 26 Sept 2026, 20:25

Raw JSON

Khun Bank

FREELANCE REAL ESTATE AGENT (TH)

Agent page Contact on DDproperty ↗

This listing ฿144,422Median ฿165,909฿161,255 – ฿169,606

Price history

Observed at	Price
26 Sept 2026, 20:25	฿6,499,000

Net rental yield

Estimated gross rent	฿368,177
Common area fee	− ฿43,200
Vacancy allowance	− ฿30,261
Letting agent fee (1 month/year)	− ฿30,681
Land & Building tax	− ฿1,337
Furnishing & maintenance allowance	− ฿18,409
Net annual income	฿244,289

Net yield

3.8%

3.6% – 4.0%

vs. 5.7%% gross

5.7%

Total investment

฿6,499,334

Price + ฿334 buyer's costs

Cost of owning: ~฿3,600/mo common fee (฿80/m²/month)

Cost of buying

Land Office fees and taxes on top of the price. An estimate: the exact amounts are set by the Land Office on transfer day.

Official appraisal

฿148,500/m² × 45 m² = ฿6,682,500

Treasury Department appraisal, building median (฿144,700–฿154,000/m² by floor) · Registered as: คลาส สยาม

Asking price is 0.97× the official appraisal

Valid until 31 Dec 2026 (the next appraisal cycle starts in 2027). Source: Treasury Department (assessprice.treasury.go.th)

Buyer is a Thai individualMortgage loanTransfer fee paid bySeller has owned itSeller in the house registration ≥ 1 yearSeller is a company (developer)

Transfer fee (0.01 % relief)· split	฿668
Stamp duty (0.5 %)· seller	฿33,413
Withholding income tax· seller	฿158,888
You pay on top of the price	฿334
All-in for the buyer	฿6,499,334
Seller's taxes and fees	฿192,634

Relief applies: 0.01 % transfer and mortgage fees for Thai buyers when price and appraisal are ≤ ฿7M (until 30 Jun 2027).

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Source details

Recency: Listed on Sep 09, 2026 (2w ago)
Developer: Khun Bank
Agency: FREELANCE REAL ESTATE AGENT (TH)

Cost of buying

Land Office fees and taxes on top of the price. An estimate: the exact amounts are set by the Land Office on transfer day.

Official appraisal

฿148,500/m² × 45 m² = ฿6,682,500

Treasury Department appraisal, building median (฿144,700–฿154,000/m² by floor) · Registered as: คลาส สยาม

Asking price is 0.97× the official appraisal

Valid until 31 Dec 2026 (the next appraisal cycle starts in 2027). Source: Treasury Department (assessprice.treasury.go.th)

Buyer is a Thai individualMortgage loanTransfer fee paid bySeller has owned itSeller in the house registration ≥ 1 yearSeller is a company (developer)

Transfer fee (0.01 % relief)· split	฿668
Stamp duty (0.5 %)· seller	฿33,413
Withholding income tax· seller	฿158,888
You pay on top of the price	฿334
All-in for the buyer	฿6,499,334
Seller's taxes and fees	฿192,634

Relief applies: 0.01 % transfer and mortgage fees for Thai buyers when price and appraisal are ≤ ฿7M (until 30 Jun 2027).

25 sale listings in a 79-unit building

Net rental yield

Estimated gross rent	฿368,177
Common area fee	− ฿43,200
Vacancy allowance	− ฿30,261
Letting agent fee (1 month/year)	− ฿30,681
Land & Building tax	− ฿1,337
Furnishing & maintenance allowance	− ฿18,409
Net annual income	฿244,289

Net yield

3.8%

3.6% – 4.0%

vs. 5.7%% gross

5.7%

Total investment

฿6,499,334

Price + ฿334 buyer's costs

Cost of owning: ~฿3,600/mo common fee (฿80/m²/month)

Key facts

Price vs market

13 % below market

vs 12 similar units in this condo

Net rental yield

3.8% net yield

5.7% gross before costs

Buying costs

฿334

Thai buyer (fee relief); foreign buyer ฿66,825

Common fee

฿3,600/mo

฿80/m² per month

Could rent for

฿30,681/mo

5.7 % gross yield

Project

Klass Siam

Built

2017

Floors

Units

Building facilities24h security · CCTV · Garden · Gym · Jacuzzi · Keycard access · Library · Lift · Parking · Swimming pool

Commute to business hubs

Siam
Walk 3 min → BTS National Stadium → Siam (1 stop)
~8 min
Silom
Walk 3 min → BTS National Stadium → Silom (3 stops)
~12 min
Sathorn
Walk 3 min → BTS National Stadium → Sathorn (4 stops)
~14 min
Asok / Sukhumvit
Walk 3 min → BTS National Stadium → Asok / Sukhumvit (5 stops)
~16 min
Rama 9
Walk 3 min → BTS National Stadium → MRT Sukhumvit → Rama 9 (7 stops)
~28 min

Other units in Klass Siam

See all 98 in project

Price history

Observed at	Price
26 Sept 2026, 20:25	฿6,499,000

Klass SiamAll units in this condo →

Key facts

Price comparison?Estimated from other current listings, not a valuation — just a signal.Typical range (25th–75th percentile) of comparable listings, per m²

Rental estimate & yield?Gross yield = estimated rent × 12 ÷ asking price, before common fees, taxes, vacancy and agent fees. Asking rents, not signed contracts.

Location

Commute to business hubs?Estimated from OpenStreetMap rail lines, typical dwell/transfer times and walking speed — not a live timetable.Position is this project's approximate location; walking time is approximate too.

Other units in Klass Siam

Similar condos nearby?Other projects with a 1 bed unit at a similar price and size, closest first.

Address

Listing history

Price history

Cost of buying

Source details

Cost of buying

Location

Key facts

Commute to business hubs?Estimated from OpenStreetMap rail lines, typical dwell/transfer times and walking speed — not a live timetable.Position is this project's approximate location; walking time is approximate too.

Other units in Klass Siam

Price history

Similar condos nearby?Other projects with a 1 bed unit at a similar price and size, closest first.

Price comparison

Rental estimate & yield

Commute to business hubs

Similar condos nearby

Commute to business hubs

Similar condos nearby