Not shure if this is the best place for this, but here it goes. I have the chance to purchase a 50's bungalow that was my grandmothers. The house was built in 1952 and is in good condition although dated. It is located in a great area ( near by family and where I grew up) and the town has a excellent school system ( the main reason for selling our current home) . The house is aprox 1200 sq feet with hip roof. A addition would be a must to make the house liveable for us. The only way to add on is to go up because there is no room on sides ( lot setbacks ) and don't want to loose the backyard. So now to my question, how can I tell if the structure is able to hold a second floor addition, without major reworking of the original first floor or foundation? Can a good builder be able to look at the house and tell, or do I need to get a engineer involved and spend tons of money, just to find out if I can add a second floor before I buy it?? The foundation is in good condition no visible cracks at all, which I thought was good for a 60 year old house. I believe that the foundation is block, but there are slight lines that look like mortar joints but are not tooled like a normal cinder block foundation. Looks like a poured wall and the forms were made from individual boards? when I feel the top of the wall by the sill there are no voids? possibly solid blocks or were filled with cement? I have no Idea what there is for a footing but the house shows no settling. I do know the soil is more clay than anything. My other question is that the original house is framed 2x4 and all new houses here are framed 2x6 ( north of Boston ) would the addition be 2x6 or 2x4 like the original house??? Any help would be great. I don't want to spend thousands to find out the house cannot be added onto within a reasonable budget. I would have a builder frame and put up the shell and finish most of it myself.