... are there illegal structures?
For independent construction, a person can incur:
administrative liability - a fine;
criminal liability for construction on an arbitrarily occupied plot - a fine, or arrest for a term of up to 6 months, or imprisonment for a term of up to 3 years.
According to the court's decision, the amount of the fine can be up to 18 tax-free minimums. A fine is imposed in the case of construction of a building without a permit and project, in violation of building regulations. Also administrative responsibility.
Criminal liability threatens the developer in cases where he illegally occupied a plot of land and built a house or other structure on his own.