HDB Bathroom Renovation Singapore 2026: Costs, Tiles & What You Must Know 🔍 An HDB bathroom renovation in Singapore costs $6,000–$12,000 for a common bathroom and $8,000–$16,000 for a master bathroom in 2026. The cost depends on whether you hack or overlay existing tiles, the tile format and grade, sanitary fitting selection, and whether waterproofing needs to be replaced. Waterproofing is the most critical decision — getting it wrong creates legal liability for water damage