The company we're using is rather large, so I'm surprised we're getting so few answers to our questions. We're going to put them to task this afternoon and give them a chance to correct the issue or we're going elsewhere.
First, you should be in a possession of a formal letter from the lender. This letter should contain the up-side amount you're pre-approved for, the terms of the mortgage they intend to provide, amount of down payment you'll be required to make and under what conditions they have preapproved you -- for instance, verification of funds for down payment, copy of latest pay stub, yada yada. Here's a link w/more information:
What should a preapproval letter contain? | Mortgage Reference Library It probably won't contain the interest rate you'll be charged because that will depend upon rates current at the time of your purchase.
Just FYI -- a preapproval letter is not a guarantee that one will obtain a mortgage. That's why it is so critically important that all of the information you gave to the lender is correct. If someone misrepresents their income or amount of debt they owe, that makes the preapproval letter worthless.
If the lender is telling you that your rate is going to be 1-1/2% above the "best rate," then it may be because of your credit score...or maybe the amount of down payment you've indicated you have.
Some things to keep in mind: just because your lender preapproves you for (example) $150,000 doesn't mean that you're going to want to spend that much for your home. Don't make that mistake. Figure your mortgage payments out and
be sure you're comfortable with them at whatever amount you choose.
A $150,000 mortgage at 5.5% (that would be about 1.5% over the 'best rate' right now) would make your payment $851.68 a month (unless you have to have Private Mortgage Insurance which will probably raise it by $50 or so a month). That payment represents a 30-year mortgage.
On top of that you'll be responsible, of course, for real estate taxes and homeowners' insurance. So that means you need to pay attention to the amount of real estate taxes a particular home you like is going to have to pay. I don't know what state you live in, but here in Illinois, I'd estimate homeowner's insurance to run around $50 a month. Here's a mortgagte calculator:
Mortgage Calculator - Bankrate.com
When you've found your home, be sure to shop the mortgage. Do not just settle for the company who did your preapproval. The mortgage business is highly competitive. Shop now for the best rate and terms or risk paying literally thousands of dollars in unnecessary costs.
Think of your Preapproval Letter as your authorization to go shopping. When it comes right down to what mortgage lender you're going to use, you should be shopping at least one other lender.
Tip: Your Realtor will be a good source for a competitive and honest lender. Go with a Realtor from a personal recommendation -- someone your family or friends has used in the past and has a good reputation. They won't steer you wrong.
Good luck!! Exciting, yes??!!!!!