From a building stand point your 1056 sq represents 100,000(1000*100per sq foot, natl avg)...depending on the style (colonial, ranch or capes are easy to add on to ), condition, and area (how much would a house go for that you would like to build where you live). In most cases it is cheaper to add on, and might not require moving(which is hard to do). It might take longer to renovate than rip and build. Our home has 6.5' ceilings, which can not be fixed...so for us, it needs to be ripped down(our house is 140+ yrs old).
Also it is hard to double+ your square footage (in my case from 1200 up to 2800 is not able to be done). So it really depends. Another factor if you tear down you will generally have to meet current building codes and setbacks.
In my case we purchased the house for 70K, the lot alone is now worth 150K, and a new home 2800 sq feet would go for 650-750K on my block. To rip and build it would be about $300,000+ cost of orig house=370,000...so in our case it does make sense number wise.