There is actually an evaluator company. Bank will ask for their service for valuation. You can ask them to value a property too, but they will charge u for their service.

When bank say "i will check the value first", means they will check it with their valuer. Before they release the money their valuer might have to submit a valuation report etc etc. Bank normally pays for this.

But like i said above, u can use their service if you pay. For eg, GS Valuer's office is in SS15 subang. For unformal service, just ask a bank/call up the valuer.