The regulations concerning construction in Helsinki are available in its building regulations.
The building regulations of the City of Helsinki are central guidelines regulating construction, in addition to the local detailed plans. They decree on matters such as what can be built and renovated without a permit from the construction supervision body.
- Read the short version of the building regulations: City of Helsinki Building Regulations (In Finnish, PDF, 1 MB
You can find more specific instructions in Constructions project instructions.