About ONE-M
An integrated construction consultancy, built around the owner.
One Management Co., Ltd. — an independent, end-to-end construction consultancy helping owners deliver successful projects across Thailand.
Client's Success is Our Success.
ABOUT
Who We Are
One Management Co., Ltd. (ONE-M) is an independent project and construction management consultancy with more than 30 years of experience delivering professional services across a wide range of developments in Thailand.
Our multidisciplinary team supports project owners throughout the entire project lifecycle—from planning and design coordination to procurement, construction management, cost control, and project closeout—helping clients achieve successful outcomes through quality, efficiency, and professional excellence.
Our Direction
Mission & Vision
Mission
To deliver every project with transparency, responsibility, teamwork, the highest professional standards, and on-time delivery.
Vision
To be Thailand's trusted leader in Project and Construction Management, delivering sustainable value through professional excellence.
What Guides Us
Core Values
Optimization
Manage resources and processes efficiently to achieve the best possible project outcomes.
Network of Trust
Build lasting relationships through trust, integrity, and close collaboration.
Expertise
Deliver professional excellence through knowledge, experience, and continuous development.
OUR STORY
From Management 103 to ONE Management
Our Beginning
Management 103 Co., Ltd. was established as an affiliated company of Design 103 Co., Ltd., evolving from its Engineering and Construction Supervision Department to provide dedicated project and construction management services.
Becoming Independent
Management 103 Co., Ltd. became an independent company while continuing to provide professional project and construction management services.
ONE Management
The company was renamed One Management Co., Ltd., marking a new chapter in its continued development as an independent project and construction management consultancy.
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.