Let me caution you all that no matter what FICO and the bureaus say about how they look at mortgage inquiries---they are masters of mis-information and there is no proof of what they say. You can shop for a loan andhave youir score go up. I was a mortgage broker for almost 30 years. Ive seen it happen. Preoblem is the score can change daily even if there has been no activity on any account! The bureaus can tell you that the increase had nothing to do with the multiple mortgage inquiries and these is nothing you can do to prove otherwise.
The entire concept of having a score lowered for just inquiring about items to purchase or trying to find different credit cards, etc. is horribly flawed!!! What if I looked at ten cars before deciding to buy? Yeah, its not wise to give your social security number but many times they have to take it and pull you just to see what type of financing they can offer. If you dont like the terms and go elsewhere, why should you be penalized? They know by the end results that you didnt buy ten cars. Its just another way to KEEP SCORES DOWN for the benefit of the lenders, who raise rates as scores lower. This used to be a huge part of the sub-prime world when it happened en masse and millions of people were ripped of with high rates they didnt deserve. Its harder no for that to happen and usually results in a flat rejection for a mortgage instead of an increased rate.
Have one lender pull your full report with all scores. Ask for a copy. If you shop anywhere else, tell them they must use that or use nothing. Some wil tell you that to be truely, fully approved they must run you through the underwriting computer systems and that uses a new pull to grade you. Unfortunately this is true, and another way the score company, Issac Fair (FICO) makes money off every living person in the country.