You might need more walls then to expand the city. 
Maybe you could add a little cobblestone road printed on paper through the streets to increase the city feeling further of your beautifull capital?
I have two big bags full of steck and lots of medieval klickies i havent used. There is no more space in this room , i need to do something for my vikings as they are a key part in many stories. As for the city , for hte time being just like in NY , since i cant expand floor wise, i will go ' up' and various steck houses incl all teh marekt houses will simply gain anotehr floor !!!!

I really like the idea of the road printed on paper , at the moment i havent got he time to re set the city i want to concentrate on my photostories and some battles etc etc but i agree its a great idea
Also Tahra, you can see i am sure i need to go high and build more floors now, i shoudl have also created a more realistic layout of medieval houses at angles and smaller roads rather than this perfect layout but anyways. I still have hundreds of unsued steck pieces and towers etc, i plan to buy 1500 more steck pieces in late 2012 and my next medieval city sometime in 2013 perhaps will be in another room which is much bigger and this City will be no less that 70% bigget i estimate and the outside walls will be wider and inside walls taller etc etc , but i want to get my stories doen first with this edition !!!