NexDoor | April 2026 Key Takeaways Most upgraders need $180K–$235K in cash upfront on top of CPF to fund the upgrade Monthly expenses typically rise by $4,000 to $4,500 — mortgage, maintenance, and property tax combined Keeping your HDB and buying a condo means paying 20% ABSD — $300,000 on a $1.5M purchase — with no refund HDB resale prices rose 54.8% from Q1 2020 to Q4 2025 — the pace has since moderated to 2.9% in 2025 You cannot return to BTO, and buying a resale HDB requ