How long before a landlord can increase rent? For most private rented homes in England, a landlord can generally increase the rent once in any 12-month period for an assured periodic tenancy. The landlord cannot normally increase the rent during the first year of the tenancy and must give the tenant at least two months’ notice using the prescribed Form 4A under the Section 13 process. That is the short answer. The practical answer is more important: a rent increase is not sim