Having bought a 100+ Year Old house - it definitely came with some characteristics as well as some challenges. Since our House was completely renovated inside out by the seller - the only major thing that the house needed was "repointing". For the newbie H/O Repointing is the process of removing deteriorating mortar from the joints of a masonry wall and replacing it with new mortar. It's a labor intensive and a pretty expensive job. But don't get too alarmed since repointing is supposed to last for at least another 50 to 100 years.
An expensive job like this calls for a lot of research - So, after going through few different contractors - I finally reached out to Enrique Avila from Avila Construction. Enrique and his crew came the next day and after few rounds around the house - he came up with an estimate which was far lower than the other contractors. Needless to say - we went with Avila Construction. Fast forward a week and the house is neatly tucked and re-pointed. He was very professional and understanding about our requests and asked up to double check to make sure we were happy with his work.
So, if you own or are planning on buying an old house that needs major renovation. I would highly recommend you contact Avila Construction since they specifically specialize in remodeling older homes.