The landlord is responsible for major repairs and maintenance of the rented accommodation. The tenant is responsible for minor, not expensive repairs.You can find an overview of repairs and who is responsible for them on the website of the government. (Dutch only) If you have a complaint about the maintenance of the house, you have to contact your landlord. It is suggested to do this in writing. If you and your landlord can’t agree about the maintenance, you can go to court or ask the rental committee (huurcommissie) to judge the situation. You can only go to the huurcommissie if your house qualifies as social housing (rent up to a maximum, determined by the government). On the website of the government you can find out if your house qualifies as social housing.
If your house qualifies as “free sector” (vrije sector) you can only go to court. It is suggested to ask help from a lawyer as the rules as quite complicated. The Juridisch loket can advise you what to do.