Anyone with experience or recommendations for house and the land it sits on appraisals?  

This should include structural examination. 

the land in different areas of the city has pretty specific value .  For example, Nong Hoi area 

( Holiday Inn and vicinity)  might be around 40k baht per talangwa ( residential) . Where in the inner city or close to it like Santitam  can be a LOT more per talangwa .  

Then there is Faham/ Sanpisua  where the residential land is around 20k talangwa ...

etc etc      Any land on a good road is MUCH higher,  due to commercial value.

I speak Thai so can basically go around to an area,  BS with a few shop owners,  RE agents,

and call for sale signs to get a general idea in that area.

 

As for the structure...... well,  is it a house or commercial building .   How big, what condition.

An architect might know someone who could give an opinion on the structural condition.

Whether anyone has a business doing that i would not know.  English owner at Perfect Homes might answer some questions.......

https://www.area.co.th/index.php

Not cheap but thorough