Judges
All Hosters will judge all buildings. Each will submit a score, the one with the highest at the end, wins.
General Tips
Common Materials: Common materials is at it said before, common. Plenty available, and easy to use, but hard to master. If one master using common materials in builds, it can become a great building as a whole, with only common ones.
Rare Materials: Often used to make things look better. This can be very expensive, however, you can make thing look great with it. If you plan to use it, make sure you have plenty. Calculate beforehand how much you would need minimum.
Plot Size: The plot size might be limiting, however, even with a limited size, you can make a great building. Small buildings have their own charm.
Open Space: This is a point many people struggle with. When to use interior decoration, and how to make it look good, and when not. Experiment and think if it would look good.
Judging
Every judge have their own opinions, and will rate stuff differently. I will give some tips here, and also what I would look at.
Use of common materials. The mastery of this is hard. Use them well, and you might get a little more.
Interior design. Please keep a good judgement of this.
Space. You got a plot. It has a lot of space. Even if the building does not occupy all of it, maybe a garden would make it even better.
Rules. Break them and you will be DQed. I will also be looking at that.