In Q1 2026, our analysts are tracking 7 approved infrastructure projects in Phuket with a combined value exceeding 170 billion THB (based on our estimates, approximately 4.9 billion USD at March 2026 exchange rates). Each project carries a defined schedule, an identified funding source, and a measurable transmission mechanism into residential property prices in adjacent districts. Below we set out the current construction status, delivery milestones, and the price dynamics our data sets suggest.
Koh Samui, while smaller in scale, has its own pipeline of approved investments - primarily road and hospital infrastructure. We analyse both islands in parallel because international buyers increasingly compare the two on the basis of infrastructure spending relative to per-square-metre price momentum.
Quick answer
- Patong Tunnel (Kathu-Patong corridor): budget approximately 15.8 billion THB, funded by the Department of Highways; planned completion 2028-2029. Will cut the Patong commute from roughly 40 minutes to around 15 minutes. As of 2026: EIA environmental review is ongoing, tender evaluation in progress.
- Phuket Light Rail Transit (LRT) - airport to Chalong route: 35.2 billion THB, Ministry of Transport funding. As of 2026: preliminary design approved; full operations targeted for 2031-2032.
- Phuket International Airport (HKT) expansion: new international terminal, target capacity 18 million passengers per year (up from approximately 12.5 million currently). Budget 5.8 billion THB, funded by Airports of Thailand (AOT). Scheduled handover: 2027.
- Eastern Phuket Bypass: 30 km alignment, budget 4.2 billion THB, designed to relieve routes 402 and 4027. Status: plan approved, tender awarded, earthworks commenced Q4 2025.
- Ao Po Grand Marina expansion: berth capacity increasing to 350, privately financed. Target completion: 2027.
- Vachira Phuket Hospital - new building: budget 2.1 billion THB, Ministry of Public Health funding. Planned opening: 2028.
- Koh Samui - Southern Ring Road: 22 km, budget approximately 3.5 billion THB. Status: EIA approved, tender announced Q1 2026.
Options and scenarios
We model three scenarios for how Phuket infrastructure investment translates into property prices by 2029. Our baseline is historical: the completion of the Chalong-Rawai road in 2018 drove land prices in Rawai up by 18-22% within 24 months of opening, per transaction data held by the Phuket Provincial Land Office.
Scenario A - on-schedule delivery. All seven projects proceed without material delays. In this case, districts within the direct influence zones (Bang Tao, Layan, Kamala, Kathu, Ao Po) could register condominium price growth of 12-18% over a three-year horizon. We forecast the strongest price impulse around LRT stations along the airport-Thalang-Cherng Talay corridor and at the Patong Tunnel portals.
Scenario B - delays of two to three years. Historically, approximately 60% of large infrastructure projects in Thailand experience delays, according to NESDC data. Under this scenario, price growth in influence zones would be moderate at 5-8%, partly because the market already priced in the announced plans during 2024-2025. The LRT is the highest-risk item here: its schedule has already shifted three times since 2017.
Scenario C - partial delivery. Some projects (most likely the LRT) are frozen or significantly scaled back. Shorter-horizon investments - airport expansion, eastern bypass - are completed. Price appreciation narrows to 3-5% and concentrates exclusively in the immediate vicinity of completed works.
Comparison table
| Project | Budget (billion THB) | Status as of 2026 | Planned completion | Districts in influence zone | Estimated price impact per sqm |
|---|---|---|---|---|---|
| Patong Tunnel | 15.8 | Tender evaluation / EIA | 2028-2029 | Kathu, Kamala, Patong | +10-15% in Kathu |
| LRT airport-Chalong | 35.2 | Preliminary design approved | 2031-2032 | Thalang, Cherng Talay, Chalong | +8-18% along corridor |
| HKT Airport expansion | 5.8 | Construction underway | 2027 | Mai Khao, Nai Yang, Thalang | +5-10% |
| Eastern Bypass | 4.2 | Earthworks underway | 2028 | Koh Kaew, Rassada, Cape Panwa | +6-12% |
| Ao Po Grand Marina | approx. 1.5 (private) | Expansion underway | 2027 | Ao Po, Pa Khlok | +8-14% |
| Vachira Hospital (new building) | 2.1 | Architectural design stage | 2028 | Phuket Town, Wichit | +3-6% |
| Koh Samui Southern Ring Road | 3.5 | EIA approved, tender out | 2029 | Lamai, Hua Thanon, Taling Ngam | +7-12% |
Risks and mistakes
Buying the announcement rather than the concrete. This is the most common error we observe in Asian real estate markets. When we verify conditions on the ground, we consistently find that developers price in future infrastructure two to three years before it actually opens. The LRT is the clearest example: plans were announced in 2017, and as of 2026 the line still has no construction permit. Land values along the planned corridor have risen by an estimated 40-55% since then, based on our analysis of Phuket Land Office transaction records - a significant portion of that gain rests on expectation alone.
Currency risk. Investors holding capital in currencies other than THB should note that the THB has fluctuated materially against major currencies over the past five years. A 15% gain in THB terms can be partially or fully eroded by an unfavourable exchange rate move. We recommend stress-testing returns across a range of FX scenarios before committing.
Administrative delays. The EIA process for large road projects in Thailand averages 18-30 months. The Patong Tunnel, first announced in 2015, is only now completing its final environmental review stage. We recommend applying a minimum 18-24 month buffer to any official completion date when modelling cash flows.
Political and budgetary cycle risk. Projects funded from the central government budget - the LRT and the new hospital building - are sensitive to political cycles. A change of government can shift budget allocations and reprioritise capital spending.
No guarantee of price appreciation. Infrastructure raises locational attractiveness but does not neutralise oversupply risk. In Cherng Talay and Bang Tao, our analysts are tracking a rising volume of new condominium launches. If supply outpaces demand, even completed infrastructure may fail to deliver price growth at the district level.
FAQ
Which Phuket infrastructure projects have active construction work as of 2026?
As of Q1 2026, physical construction is confirmed at three sites: the HKT airport expansion, the Eastern Bypass (earthworks), and the Ao Po Grand Marina expansion. The remaining four projects are at tender evaluation or environmental review stage.
How will the Patong Tunnel affect property prices in Kamala and Kathu?
Based on our estimates, cutting travel time from 40 to approximately 15 minutes could lift prices in Kathu by 10-15% within 24 months of opening. Kamala is likely to see a smaller uplift because it already enjoys reasonable coastal access independent of the Kathu bottleneck.
When is the Phuket LRT expected to open?
The official target is 2031-2032. Given the project history - announced in 2017 and rescheduled three times since - our analysts recommend planning for a realistic opening window of 2033-2034.
Is the Phuket airport expansion a confirmed project?
Yes. It is an active construction project funded by Airports of Thailand (AOT), a publicly listed entity. The new terminal is designed to raise annual capacity from approximately 12.5 million to 18 million passengers. Handover is scheduled for 2027.
What approved infrastructure projects affect Koh Samui?
The most significant approved project is the Southern Ring Road (22 km, 3.5 billion THB, tender launched Q1 2026). We are also monitoring an expansion of the Nathon hospital and modernisation works at Na Thon port, both of which remain at early planning stage as of 2026.
How do we distinguish an approved project from a planning concept?
We apply three criteria: a completed and approved EIA, an awarded tender, and commenced earthworks or construction. We classify a project as 'approved' only when at least two of the three conditions are met.
Which Phuket districts are likely to benefit most from the combined infrastructure pipeline?
Based on our estimates, the highest cumulative impact is forecast for Thalang and Cherng Talay (LRT corridor, proximity to the expanded airport, bypass connectivity), Kathu (Patong Tunnel portal), and Ao Po / Pa Khlok (marina expansion plus Eastern Bypass access).
What does historical data say about infrastructure-driven price growth in Phuket?
Completed road projects in Phuket have historically produced land price increases of 15-25% within a 5 km radius over two to three years, per Phuket Land Office data. The critical timing factor is entry point: buyers who purchased during the advanced construction phase, rather than at the announcement stage, captured the bulk of that gain.
How significant is the delay risk for Thai infrastructure projects?
According to NESDC data, approximately 60% of large infrastructure projects in Thailand experience delays ranging from one to five years. Our standard modelling approach adds an 18-24 month buffer to all official completion dates.
How does airport expansion affect short-term rental yields in nearby districts?
In our data sets, airport capacity increases correlate with higher tourist arrival volumes, which in turn support occupancy rates in short-term rental properties in Mai Khao, Nai Yang, and northern Thalang. Per market estimates, a 30-40% increase in terminal capacity could support yield improvements of 0.5-1.5 percentage points in those districts over a three-to-five year horizon, assuming supply growth remains measured.
To summarise: we are tracking 7 approved infrastructure projects in Phuket and 1 major project in Koh Samui, with a combined declared value of approximately 170 billion THB. The most advanced works - the airport expansion, the Eastern Bypass, and Ao Po Marina - carry a credible probability of completion by 2028. The LRT and the Patong Tunnel require a more cautious reading; both carry material schedule risk. Our current recommendation is to prioritise districts where construction is physically underway rather than districts where approval exists only on paper.
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