In Q1 2026, our analysts are monitoring 14 active off-plan projects in Maenam, Koh Samui, spanning villa and condominium segments. Nine of those projects had not yet reached shell-and-core completion at the time of our review. Indicative pricing for an off-plan pool villa in Maenam currently sits at 8.2-11.5 million THB, which our estimates place roughly 12-18% below comparable secondary-market stock in the same district.
Maenam remains one of the few districts on Koh Samui where first- and second-row beachfront plots are still available below 12 million THB for a finished villa. For context, comparable projects in neighbouring Bophut open at 13-15 million THB. That price gap is a primary driver of off-plan demand from international buyers. Below, we break down the transaction mechanics of buying off-plan in Maenam: payment schedule structures, stage-by-stage risk exposure, and contractual protections available to buyers.
Quick answer
- Off-plan discount in Maenam is currently estimated at 12-18% relative to finished resale stock in the same district (Q1 2026 data)
- Typical payment schedules spread across 5-7 tranches over a 12-24 month construction window
- Reservation deposits run 100,000-300,000 THB (generally non-refundable) and the first contract tranche is usually 25-35% of the purchase price
- There are no protected trust accounts for foreign buyers in Thailand; transaction security rests entirely on contract quality and developer financial standing
- We track average construction timelines for pool villas in Maenam at 14-20 months from permit issuance
- Key risk triggers include delays in the Environmental Impact Assessment (EIA) process and utility connection issues in the less urbanised parts of Maenam
Options and scenarios
Three payment schedule structures observed in Maenam
Based on contracts our analysts reviewed across Maenam projects active in 2024-2026, three dominant payment structures emerge. Each carries a different buyer-risk profile.
Structure A - Conservative (back-loaded): The developer collects smaller tranches during construction, with the largest payment (40-50%) due at handover. This is the most buyer-friendly arrangement: if construction stalls, the buyer's financial exposure at that point remains limited. We observe this structure primarily with developers who hold their own capital or have secured bank financing.
Structure B - Balanced: Payments are distributed roughly evenly, with 15-20% tied to each construction milestone. Buyer exposure grows linearly. This is the most common structure in Maenam as of 2026.
Structure C - Aggressive (front-loaded): The developer collects 50-60% of the purchase price before the shell-and-core stage is complete. The buyer carries the heaviest exposure at a point when the asset has limited physical substance. This pattern appears most often with smaller developers who finance construction directly from buyer deposits.
Risk exposure in numbers
For a villa priced at 10 million THB in Maenam, the choice of payment structure directly determines how much capital is at risk at each build stage:
- Under Structure A, the buyer has paid approximately 3.5 million THB (35%) by the end of foundation works
- Under Structure B, the same milestone triggers 5.0 million THB (50%) in cumulative payments
- Under Structure C, exposure reaches 6.0 million THB (60%) at that point
The gap between Structure A and Structure C at the shell-and-core stage is 2.5 million THB. That is additional capital the buyer places at risk without receiving proportionally stronger contractual protection in return.
Maenam versus other markets
For reference, our analysts track off-plan discounts in comparable segments across the region. In Bang Tao, Phuket, the off-plan discount in the same villa tier sits at approximately 8-14%, and in Layan at 10-16% (Q1 2026 estimates). Maenam therefore offers a modestly wider discount, which reflects partly the lower secondary-market liquidity on Koh Samui relative to Phuket.
That said, the time value of capital matters. With a construction horizon of 18 months, the real effective discount narrows once the opportunity cost of committed capital is factored in. On our estimates, the adjusted off-plan advantage in Maenam falls to roughly 5-11% in real terms. That remains a meaningful spread, but it requires a deliberate calculation rather than a headline assumption.
Comparison table
| Parameter | Structure A (Conservative) | Structure B (Balanced) | Structure C (Aggressive) |
|---|---|---|---|
| Reservation deposit | 100,000-200,000 THB (1-2%) | 200,000-300,000 THB (2-3%) | 200,000-300,000 THB (2-3%) |
| Contract signing | 25% | 30% | 35% |
| Foundation + EIA clearance | 10% | 20% | 25% |
| Shell and core | 10% | 15% | 20% |
| Fit-out and finishes | 10% | 15% | 10% |
| Handover | 44-45% | 18-20% | 7-10% |
| Exposure at shell-and-core stage | 35% of price | 65% of price | 80% of price |
| Buyer negotiating leverage at handover | High | Moderate | Low |
| Typical developer profile | Established, self-funded | Mid-size, experienced | Small, deposit-funded |
Risks and mistakes
Stage 1 - Permits and EIA (months 1-4)
In Maenam, particularly near coastal zones and mangrove-adjacent plots, the Environmental Impact Assessment process can extend the construction start date by 3-6 months. We have tracked instances in which developers began off-plan sales before obtaining full building permits. This represents a material risk: buyers commit a reservation deposit and first tranche before a single foundation brick is laid.
Contractual protection: The purchase agreement should include a clause requiring a full refund of all payments made if the developer fails to secure a building permit within a defined period, typically 90-120 days from contract signing.
Stage 2 - Foundation and structural works (months 4-10)
Ground conditions in Maenam are uneven. In the southern section of the district, closer to Route 4169, the terrain can be waterlogged, which complicates foundation works. Weather-related delays during the rainy season (October-December) can add 4-8 weeks to this phase.
Contractual protection: We verify whether the contract includes a penalty clause for delays. The market reference in Thailand is 0.01-0.05% of the contract value per day beyond the agreed completion date. Many developers in Maenam insert a 60-90 day grace period before penalties apply. We recommend negotiating that buffer down to no more than 60 days.
Stage 3 - Fit-out and utilities (months 10-16)
Common friction points at this stage include delays in imported materials (natural stone, European sanitary fittings) and difficulties connecting to water and electricity networks in the less-developed parts of Maenam. Based on our on-the-ground monitoring in 2025, at least three projects in the northern section of the district experienced 2-4 month delays attributable to PEA electrical connection backlogs.
Contractual protection: The agreement should include a detailed finish specification as an annexed schedule. Any substitution of materials should require written buyer approval.
Stage 4 - Technical handover (months 16-20)
Handover is the moment at which the buyer holds maximum negotiating leverage - provided a sufficiently large final tranche is still outstanding. In our observations, buyers with a final tranche below 15% of the purchase price have limited practical ability to enforce snagging rectification before releasing payment.
Contractual protection: We recommend negotiating a minimum 12-month structural warranty and the right to withhold 5-10% of the final payment as a retention amount pending defect resolution.
Common mistakes made by international buyers in Maenam
- Paying a reservation deposit before verifying that a valid building permit exists
- Accepting a front-loaded payment schedule without attempting to negotiate
- Omitting a delay-penalty clause, or accepting a grace period exceeding 90 days
- Signing the purchase agreement without engaging an independent Thai property lawyer
- Not checking the developer's track record of completed projects on the island
FAQ
Is off-plan in Maenam safe without a protected trust account?
Thailand has no protected trust accounts for foreign real estate buyers. Transaction security in Maenam, as elsewhere in Thailand, depends on the quality of the purchase contract, the developer's track record of completed projects, a payment schedule weighted toward later tranches, and independent legal review before signing.
What is the typical reservation deposit for an off-plan property in Maenam?
Reservation deposits in Maenam generally fall in the range of 100,000-300,000 THB. These amounts are typically non-refundable but are credited toward the total purchase price at contract signing.
How long does it take to build an off-plan villa in Maenam?
Based on our tracking data, pool villas in Maenam take 14-20 months from permit issuance to handover. Condominium projects run longer, generally 24-30 months for completion.
What delay penalties are standard in Thai off-plan contracts?
The market reference is 0.01-0.05% of the contract value per day beyond the agreed delivery date. Many developers in Maenam negotiate a 60-90 day grace period before penalties become active. Our analysts recommend limiting that buffer to 60 days or less.
Can a foreign buyer own a villa freehold in Maenam?
Foreign nationals cannot hold land freehold in Thailand. Standard structures for villa acquisitions are a long-term leasehold (commonly structured as 30+30+30 years) or purchase via a Thai company. Condominium units can be purchased freehold by foreigners, subject to the building-wide foreign-ownership quota of 49%.
What additional costs apply to an off-plan purchase in Maenam?
Beyond the purchase price, buyers should budget for: transfer fee (typically 2% of assessed value), business tax or stamp duty (approximately 3.3% or 0.5% depending on the holding period), legal fees (50,000-150,000 THB), and, for condominiums, a sinking fund contribution and recurring common-area charges.
How does an international bank transfer work for a Thai property purchase?
Funds must be remitted from an overseas account in a foreign currency into a Thai bank account. The receiving Thai bank issues a Foreign Exchange Transaction Form (FETF), which is a required document for registering freehold condominium ownership. For villa purchases on a leasehold or company structure, the FETF is still advisable as supporting documentation.
Should a buyer choose Maenam or Bophut for an off-plan investment?
Maenam entry prices are approximately 15-25% lower than in Bophut, and the off-plan discount is wider. Bophut offers more developed tourist infrastructure and higher secondary-market liquidity. In our assessment, Maenam suits investors with a horizon of five years or more who are comfortable with a less liquid exit market. Bophut is more appropriate for buyers who may want to sell within three to four years.
Researching property in Phuket or Koh Samui? Get in touch - our analysts will prepare a data brief for your shortlisted location.