Is it normal to get a revised loan estimate on a condo purchase because the title company found extra HOA charges?

Common, and usually nothing to worry about. When you buy a condo, the lender needs a documentation package from the HOA's management company, and lenders often have no way to know in advance what that company will charge for it. HOA management companies are notorious for steep, escalating fees for what is largely paperwork they already have on file, sometimes $500 to $900 or more, with the highest fees tied to rush turnaround. Because that cost is not reasonably knowable when the initial Loan Estimate goes out, the lender can treat it as a valid change of circumstance and issue a revised Loan Estimate rather than absorbing it as a compliance problem. That re-disclosure is what you are seeing. One thing worth checking: HOA documentation fees are often a seller-paid cost tied to the seller's disclosure obligations, so confirm in your contract who is actually responsible for that charge before you accept it on your side. If the revised Loan Estimate moved only by the HOA document fee and nothing else shifted, that is consistent with a normal change of circumstance.