Hmm, there are some good builds in here but I think you can add more. You used great detail in your mansion (I have seen these ingame, it would be hard to judge just by the photos) and it was nicely designed. These are nice, however you just made three houses. On almost every accepted builder app there are more than 5 builds. I suggest adding more builds (2 or more) and trying again in a week or two.
Another thing I would like to mention is the fact that these builds are medium-small. While it is ok to have some small builds, you must also have larger,more detailed builds. Your mansion has nice shape but the other two houses are a little lacking in that. Make sure to add circles,curved lines, angles etc. to your future builds. If you need help with circles here is the chart
that started me off.
Rejected for now. You are a talented builder and I am sure you will get this soon!