A 10% national housing appreciation rate has been bandied about (non-inflation adjusted) in some publications, so a 6% appreciation can be considered normal. Some other post quoted a 9.3% rate for San Diego pre-bubble.
But that’s the whole point for this thread – with the easy money running around, the feds printing money, there could a stealth inflation that might actually hold up housing prices (and other asset/commodity prices) and cause a price drop to be at least negligible.