Building in Thailand: Contracts, Bonds, and Site Controls That Protect Your Project
- 4 days ago
- 5 min read
In the dynamic world of construction, especially in a unique market like Thailand, managing risks is crucial for the success of any development project. For owner-developers, having a practical toolkit that encompasses contracts, bonds, and site controls can keep the project on track and within budget. Construction risk is manageable when the right systems are in place. This blog post will guide you on how to structure your contracts, ensure effective guarantees, and adopt strong site routines that not only promote timely completion but also maintain cost-effectiveness.
Choose Your Delivery Model (Fit to Your Priorities)
When embarking on a construction project, one of the first decisions is to choose the delivery model. There is no one-size-fits-all solution; rather, the choice varies with your priorities regarding cost, control, and speed.
Traditional (Design–Bid–Build)
In this model, cost certainty is achieved after the tendering process, allowing for significant design control. The advantages include competitive pricing and a clear separation between design and construction roles. However, the trade-off is a longer timeline and potential coordination gaps between the designer and contractor.
Pros: Cost certainty, competitive pricing
Watch-outs: Longer project timelines, coordination gaps
Construction Management (CM)
This method offers speed to market and transparency. Owner input is vital for early contractor engagement, allowing for flexible packages. The downside is that strong governance from the owner is required to mitigate cost risks if not controlled properly.
Pros: Speedy execution, transparent processes
Watch-outs: Requires strong governance, cost risks
Design–Build (D&B)
This is a single-point responsibility model that facilitates speed and efficiency. The fewer the interfaces between design and construction, the less room there is for delays. However, ensuring design quality demands a robust project brief alongside thorough technical performance specifications.
Pros: Speed, fewer interfaces
Watch-outs: Requires a strong design brief
Image Placeholder

The Contract Pack That Prevents Disputes
Having a robust contract pack is essential in locking in commercial and technical clarity before construction mobilization. Your contract pack should encompass several critical elements, such as:
Scope matrix and drawings/specifications hierarchy: This clarifies which document governs conflicts.
Program obligations: Include baseline schedules and requirements for notice.
Payment mechanisms: Clearly outline valuation methods and conditions for advance payments.
Variations & claims: Define instruction channels and pricing frameworks.
Performance metrics: Use milestones, completion targets, and possible liquidated damages.
Insurance: Detail types like CAR/EAR, third-party liability, and workers’ compensation.
Guarantees/bonds: Address bid, performance, and payment guarantees and their release conditions.
Quality & safety: Comprehensive QA/QC and risk assessment plans.
Compliance: Detail permit conditions and what constitutes as-built/O&M deliverables.
Dispute resolution: A clear escalation ladder and venues for mediation.
By ensuring these elements are included in your contracts, you significantly reduce the frequency of disputes during construction, maintaining the project's integrity and your reputation as an owner-developer.
Image Placeholder

Financial Safeguards: Bonds & Guarantees You Actually Need
In Thailand, the use of guarantees can align incentives while protecting cash flow. It is essential to only use the necessary financial instruments. Here are some typical guarantees and their purposes:
Bid Bond: Typically 1-2% of the bid value, a bid bond discourages frivolous bids and ensures price validity. Released upon contract award or tender expiry.
Advance Payment Bond: Equal to 10-20% of the advance, it secures recovery of payments made if the contractor defaults. Released once the advance is fully recovered through progress payments.
Performance Bond: Generally 5-10% of the contract sum, it acts as a security against contractor non-performance and gets released upon practical completion, minus any unresolved claims.
Payment Guarantee: This varies in amount and provides assurance to subcontractors and suppliers about payment. Typically, it aligns with contract terms, often released at final account settlement.
Clarity on whether bonds are bank or insurance instruments, their governing law, and the process for making calls is necessary for project financial management.
Quality, Safety, and Compliance on Site
Establishing a strong foundation in quality, safety, and compliance begins right on the construction site. Implementing a comprehensive QA/QC plan with Inspection & Test Plans (ITPs) per trade ensures that stakeholders are aware of hold points and witness points.
Material Approvals: Align with specifications for key finishes and require mock-ups for high-visibility areas.
Safety Protocols: Conduct daily safety toolbox talks and enforce Personal Protective Equipment (PPE) compliance.
Authority Compliance Diary: Review permit conditions, inspection schedules, and test certificates regularly.
Environmental Controls: Address aspects like dust, noise, waste management, and erosion.
Image Placeholder

Practical Reporting Cadence (What to See Weekly)
Regular monitoring and reporting are essential for keeping a project on track. Owners should ask for a one-page dashboard that includes:
Look-ahead (2-4 weeks) versus the baseline
Tracking of RFIs/shop drawing status
Procurement and long-lead item updates
Quality and safety highlights
Progress valuation, change orders, and cash flow forecasts
A risk and decision log requiring owner input
This clear reporting helps ensure that everyone involved is accountable and meets the outlined objectives.
Handover & Defects Liability (Finish Well)
A well-planned project ensures smooth handover and efficient management throughout the Defects Liability Period (DLP). Key steps include:
Progressive snagging and area sign-offs leading up to practical completion.
Compilation of as-built drawings, test certificates, and commissioning reports.
Distribution of O&M manuals and training sessions for the operations team.
A warranty schedule with clear timelines and claim procedures.
Establishing conditions for DLP response times and retention/bond release milestones.
Taking these steps can make the transition from construction to operation seamless.
The Value of an Owner's Project Manager (OPM)
An Owner's Project Manager (OPM) not only serves as a mediator among consultants, contractors, and authorities but also enhances the overall execution of the project. An OPM plays a vital role in establishing the contract framework, integrating necessary permits, and chairing progress meetings. The preservation of the owner’s leverage is paramount, as the OPM ties cash releases to verified progress and compliance.
The engagement of an OPM is an investment that pays dividends by minimizing issues and maximizing control over the project scope, timeline, cost, quality, safety, and compliance—leading to successful completion.
How AD ASIA Can Help (Next Steps)
Before you initiate the tendering process, collaborating with professionals like AD ASIA can significantly improve project outcomes. We can draft your contract pack, define essential guarantees, and set procurement and reporting routines. Additionally, our services as owner-side project managers during execution ensure that scope, time, cost, quality, safety, and compliance remain firmly under control, even through the handover and DLP stages.
With proper planning and management of contracts, bonds, and site controls, you can navigate the complexities of construction in Thailand with confidence, ensuring your project is completed on time and under budget.
Comments