Is Buying a House on Koh Samui Worth It?

Is it worth buying a house in Koh Samui in 2026? A real market analysis

Buying a house in Koh Samui in 2026 is one of the most frequently considered decisions by foreign investors, including those from Poland. The island is developing dynamically, attracting international capital and increasingly appearing as an alternative to Phuket.

At the same time, this market is no longer “easy”. Unlike previous years, investing in real estate in Koh Samui today requires data analysis, location selection, and real income potential.

What does the housing market in Koh Samui look like in 2026?

The most important change:

the market is moving from a growth phase to a selective growth phase

This means:

• not every property is growing

• only good projects and locations are growing

• investors are more aware

Koh Samui is becoming an increasingly global real estate market, attracting investors from Europe, Asia and the Middle East

How much can you earn from a house in Koh Samui?

Market data shows:

• long-term rental: 5–8% annually

• short-term rental: 7–12% annually

In some cases:

• top investments reach even 10–15% ROI

Additionally:

• average Airbnb income: approx. $34,000 annually (~1.2 million THB)

This shows that the market still generates real income

What drives the real estate market in Koh Samui?

1. Tourism

This is the main driver of the market.

• high international traffic

• year-round season

• growing rental demand

Tourism directly translates into investment ROI

2. Limited supply

• small number of sea view plots

• lack of large “mass market” developments

this supports price growth

3. Cash-based market

• most transactions without loans

• lower risk of a bubble

4. Infrastructure development

• airport

• roads

• development of premium tourism

Which houses in Koh Samui make investment sense?

Best options:

• houses with a pool

• properties close to the beach

• sea view

• premium locations

The biggest mistake investors make:

buying a “cheap house” instead of a good location

Will house prices continue to rise?

Market forecasts indicate:

• value growth: 5–7% annually

This means:

• a stable, not speculative market

• greater focus on investment quality

Risks of investing in a house in Koh Samui

1. Lack of market standardization

• varying project quality

• large differences between developers

2. Maintenance costs

• service

• pool

• management

3. Location

The biggest factor of risk and success

4. Rental seasonality

• high season vs low season

• impact on cashflow

House vs condo - which is better?

House

• greater privacy

• higher growth potential

• higher ROI in top locations

Condo

• easier management

• lower entry threshold

• higher liquidity

the choice depends on the strategy

Trend 2026 - a market for conscious investors

Key changes:

• the end of “easy investments”

• more data analysis

• ROI > marketing

The market is maturing

When is it worth buying a house in Koh Samui?

It is worth it when:

• you buy in a good location

• you analyze ROI

• you choose a proven project

When is it not worth it?

It is not worth it when:

• you buy only “because it’s cheap”

• you ignore costs

• you follow marketing

Key conclusions

1. Koh Samui is still worth investing in

2. ROI: 5–12% annually

3. value growth: 5–7% annually

4. key: location and selection

Sources

https://www.cbre.co.th/insights/figures/phuket-overall-figures-h2-2025
https://property.cbre.co.th/useful-information/phuket-condos-and-villas-2025
https://charlesdel.com/koh-samui-property-market/
https://sohoresidence.asia/real-estate-market-trends-koh-samui-what-to-expect-in-2025-2026/
https://kohsamui-villas.com/koh-samui-property-return-on-investment-roi-calculator-2025/
https://www.airroi.com/report/world/thailand/surat-thani-province/ko-samui