Heya, I recommend you check out the city overview. You can either use the shortcut from the action bar, or click on the town hall. There are three main indicators to look for:
- Are the construction materials supplied? (you said yes)
- Are they growing as fast as you expect? If you don't supply any needs, it should grow every 30 minutes. Supply basic needs to get it down to 1 minute, and additional needs to lower it even further.
- Are there enough simple houses? The residential tab should tell you if there must be some additional simple houses before new residential houses can be added.