Notice of rent increase boarding house tenancy handwritten template This is a template letter for a landlord to send to a tenant giving not less than 28 days’ notice to increase the rent for a boarding house tenancy. This letter meets the requirements of section 24(1) of the Residential Tenancies Act 1986. Notice of rent increase boarding house tenancy online template This is a template letter for a landlord to send to a tenant giving not less than 28 days’ notice to increase the rent for a boarding house tenancy. This letter meets the requirements of section 24(1) of the Residential Tenancies Act 1986.