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Free Idaho Lease
Extension Addendum Template

The agreement is signed by the same parties as the lease it attaches to.

Last reviewed September 2026

Written by LawLease Editorial

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Idaho Lease Extension Addendum

This Lease Extension Addendum is built with Idaho as the governing state. These are the Idaho landlord-tenant rules that most often bear on it, with the statute for each.

Idaho rules at a glance

Idaho rules for a Lease Extension Addendum
Rent-increase / non-renewal notice30 days in writing, for every residential leaseIdaho Code §55-304(2)
Month-to-month terminationAt least 1 month’s written notice, either partyIdaho Code §55-208
Rent controlLocal rent, fee and deposit regulation prohibitedIdaho Code §55-306

Rent, late fees & rent increases

  • Fees must be reasonable and disclosed — Under a 2023 law, every fee charged to a residential tenant — including late fees — must be reasonable. A landlord can’t charge a fee, fine or cost that isn’t in the rental agreement, or more than the agreed amount, unless the agreement is oral or the landlord gives 30 days’ written notice of the change. It applies to leases signed or renewed on or after July 1, 2023, and doesn’t limit the rent itself (§55-305).
  • No fixed late-fee cap — Idaho sets no dollar or percentage cap and no mandatory grace period; an excessive late fee risks being struck as unreasonable.
  • 30-day increase notice — In every residential lease, the landlord must give written notice at least 30 days before a rent increase takes effect (§55-304(2)); a 2025 recodification moved this rule from §55-307. A fixed-term lease can’t be raised mid-term unless it says so.
  • Rent control — Cities and counties may not enact ordinances that regulate rent, fees or deposits on private residential rentals, or force owners into optional federal housing-assistance programs (§55-306).

Idaho Lease Extension Addendum FAQs

How much notice is needed to end a month-to-month lease in Idaho?

At least one month’s written notice from either the landlord or the tenant (Idaho Code §55-208).

More Idaho landlord documents

Lease Extension Addendum in other states

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