Savings accounts rates are so low right now. You could go to your local credit union, they usually give better rates, and are often better banks in many ways than national chains.
You could also purchase CDs, which provide higher yields and better rates while still remaining liquid.
Since you don't know exactly when you will need the money cuz you don't know when your dream house will come on the market, you could get a longer term cd that has a lower penalty for early withdrawal.