Still a bit confused. If you have to go through a garage, it still is not GLA. I wouln't pour much money into it.
Well I can agree with that. But what I am basically talking about doing is converting the garage area itself into GLA. That was done to the house next door a few years ago and it appraises 55k higher than my sisters house. Both houses have the same floor plan and were built in the same year. So I wouldn't be creating some monstrosity but rather bringing her house into line with her neighbors and hopefully up a notch or two in value.
I wish I could contact the current appraiser and get his ideas on how he would appraise it with these changes. But it looks like he was a subcontractor for some place in Texas. When I called the 800 number on the appraisal they claimed not to know anyone of that name. Go figure.
Anyhow I do believe I am going to have to have an appraiser take a look at the place as is and give me some advice on how to proceed.
I know that other things are considered of course in an appraisal, but it looks to me that the greatest difference between the "bogus" appraisal and the good current one, are the comps used. They had to go out of the immediate area to find the smaller comps. Most of the houses built in the immediate area were built in the 50's and have had modifications of one sort or the other done over the years and are therefore larger than her house. Her biggest mistake I believe was that when the carport (that is sitting on a concrete slab) was enclosed at one end they used the wrong end. They should have enclosed the end next to the house so that there would be no space between the house and the new room.
My hope is that adding the missing footage back into the house, albeit in a different layout, will cause better comps to be used. I've looked into it and with the extra footage and new layout, there are some comps much closer in proximity that are similar to the layout of my sister's house after the proposed changes, and they all appraise 40-50k higher. It looks like her house is the oddball on the street now that we know there is less living space.
This has been a real bummer finding out that the previous appraiser miscalculated so badly. And my sister didn't even gain any advantage during that refi. All she wanted at that time was to reduce the interest rate. Unfortunately the lender roped her into a "conventional balloon" mortgage somehow. Which is a surprise to me as she knows to run very fast anytime she hears "balloon".
In any case I really appreciate everyone's help here.