🏡 Bidadari Estate – A Model of Precast Public Housing in Singapore
The Bidadari Housing Development is one of Singapore’s landmark public housing projects under the Housing & Development Board (HDB). Strategically located in the central Toa Payoh area, it is a showcase of how precast concrete and DfMA (Design for Manufacturing and Assembly) can be fully integrated into urban, high-density residential construction.

📍 Project Overview
- Project Name: Bidadari Housing Estate
- Location: Toa Payoh, Central Singapore
- Developer: Housing & Development Board (HDB)
- Scale: Over 10,000 HDB units across multiple precincts
- Main Contractors: Major Singapore builders with DfMA capabilities
- Construction Approach: Full adoption of precast concrete and modular units
- Timeline: Ongoing development since 2020

🧱 Precast Integration Across the Entire Project
Bidadari is a fully DfMA-ready precinct, where most structural and architectural elements are factory-manufactured and assembled on site, including:
| Precast Component | Function and Purpose |
|---|---|
| Precast wall panels | Internal and external walls |
| Precast floor slabs | Main floors and balconies |
| Precast staircases | Access and fire escape stair cores |
| Precast refuse chute systems | Waste management units integrated into core modules |
| Precast Bathroom Units (PBUs) | Pre-fitted bathroom pods with plumbing and finishes |

🌿 Benefits of Using Precast + DfMA in Bidadari
- 🏗️ 30–40% faster construction timelines
- 🔧 High precision and consistent factory quality
- 👷 Reduced on-site labor, safer working environment
- 🌱 Lower noise and dust – ideal for dense urban areas
- 💧 Better water-tightness, fewer cracks, longer durability

🧠 What Vietnam Can Learn from Bidadari
The Bidadari project offers valuable lessons for countries like Vietnam that are looking to scale up affordable housing and worker dormitories:
- ✅ Standardized precast components allow mass production
- ✅ DfMA reduces reliance on low-skilled labor and wet trades
- ✅ Precast PBUs ensure quality bathrooms with faster MEP installation
- ✅ Urban housing can be built faster and more sustainably

📈 Conclusion
The Bidadari Estate is more than a housing development — it is a model of how industrialized construction using precast concrete and DfMA can redefine the delivery of public housing. As Vietnam looks to meet growing urban housing needs, the Bidadari experience offers a clear and practical roadmap for high-quality, high-volume construction with long-term value.
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