One Management Co., Ltd.
End-to-End
Construction Consultancy
Delivering successful projects through Project Management, Construction Management, Quantity Surveying, and Construction Supervision.
Client's Success is Our Success.
- Project Management
- Construction Management
- Quantity Surveying
- Construction Supervision
Who We Are
An integrated construction consultancy, built around the owner.
ONE-M supports project owners from early planning and design coordination through construction supervision, cost control, handover, and defect management — delivering clarity and control from the first drawing to the final walkthrough.
Independent Consultant
We act in the best interests of the project owner — providing impartial, transparent, and independent advice based on facts, reliable information, and professional standards.
End-to-End Expertise
From early planning and design coordination to handover and defect management, one accountable team carries the project through.
Experienced Engineering Team
Chartered engineers and quantity surveyors with decades of delivery across hospitality, healthcare, retail, and residential.
Our Expertise
Consultancy across the full project lifecycle.
Three integrated service stages, each led by senior specialists, combine into a single line of accountability for every project we deliver.
Pre-Construction Services
Feasibility, budgeting and design-stage coordination that de-risk the project before a single foundation is poured.
- Project & Cost Planning
- Design Management & BIM Coordination
- Value Engineering
- Tendering & Contractor Selection
Construction Stage Services
Rigorous supervision, quality assurance and cost control that keep delivery on programme and on budget.
- Construction Supervision
- Quantity Surveying & Payment Control
- Quality & Safety Monitoring
- Progress & Risk Reporting
Project Close-Out & Handover
A disciplined handover with complete documentation, defect resolution and a smooth transition to operations.
- Testing & Commissioning Oversight
- Snagging & Defect Management
- As-Built & O&M Documentation
- Final Account Settlement
Experience
Delivering with confidence across sectors.
Three decades of consultancy spanning hospitality, healthcare, retail, industrial, and residential — each with its own standards, stakeholders, and complexities.
Featured Projects
A portfolio built on trust.
Trusted By
Leading organizations across Thailand
Knowledge Hub
Insight from the field.
Careers
Build remarkable projects with ONE-M.
Discover how ONE-M teams work together across disciplines, share professional knowledge, and contribute to successful project delivery.
Contact
Let's build your next project, together.
Tell us about your project. Our team will help you plan, control cost, and deliver with confidence — from concept to handover.