Residential Tenancies Act 1986, ss 25, 26
If your rent is substantially higher than the rents of similar properties in similar areas, you can go to the Tenancy Tribunal to ask it to reduce your rent to a “market rent” (to find out what the market rent is for your area or suburb, go to www.tenancy.govt.nz). If the Tribunal does order your landlord to lower your rent, the rent will usually be fixed at that level for six months. See “Problems with your landlord: What you can do” in this chapter.