Apart from the standard TDSR requirements, you will have to take note of the LTV (Loan-to-Value) requirements.
If your condo is your second mortage loan, you can only borrow up to max 50% of the purchase price/valuation price, whichever is lower.The rest of the 50% will be the downpayment, out of which 25% has to be in Cash.
If you have fully paid your HDB, you can loan up to max of 80%, with the 20% downpayment (5% Cash, 15% CPF), subjected to your CPF meeting the half-minimum sum.
Do take note of ABSD for second property too, provided it remains in place 2 years later.
Should you need any further assistance in matters relating to property, please contact me at my mobile 9748 6305. I will be happy to assess and share with you the possibilities for you and your partner in the current market.