This is an easy-to-read page.
The municipality works with physical planning.
Physical planning is about how to use land and water areas, where buildings and roads should be located and how they should appear.
Then the municipalities follow the Planning and Building Act.
There are three types of municipal physical plans: structure plans, detailed development plans and special area regulations.
The structure plan should cover the entire municipality's area.
It shows how the municipality would like the city and land to be and appear in the future and which areas the municipality thinks should and should not be used for building.
Detailed development plans have rules for where new buildings may be located and how they should appear.
Special area regulations are something between structure plans and detailed development plans.
They may, for example, decide how large a holiday house should be.