Idaho Rent Increase 2026: 30-Day Written Notice, No Statewide Cap & Mobile-Home Rules
Idaho's current Attorney General manual says ordinary residential rent increases require at least 30 days' written notice. Learn how the lease, current Idaho Code § 55-304, and separate manufactured-home park 90-day rules affect the analysis.
The short answer
The Idaho Attorney General's July 2026 Landlord and Tenant Manual states that a landlord must give a tenant written notice of a rent increase, or a change in fees, fines, assessments, interest or other charges, at least 30 days before the increase becomes effective. The current manual identifies Idaho Code § 55-304 as the lease-term-change and notice provision after the landlord-tenant chapter was reorganized.
Idaho's Attorney General also explains that Idaho does not restrict the amount of ordinary private residential rent a landlord may charge. That does not make every increase automatically valid: the lease, the required written notice, subsidized or program-specific rules, anti-discrimination law and any special property-type statute still matter. Manufactured-home park tenancies are especially important because their ordinary rent-increase rule generally uses 90 days' written notice rather than the ordinary residential 30-day rule.
Ordinary Idaho residential rent increases require at least 30 days' written notice
Under the current Idaho Attorney General manual, a landlord must provide written notice at least 30 days before a residential rent increase becomes effective. The same notice discussion covers changes in fees, fines, assessments, interest and other costs, so the analysis should not focus only on the base monthly rent when the proposed change adds recurring charges.
Record the date the notice is delivered, the current rent, the proposed rent, any changed fees and the intended effective date. A document should clearly distinguish the old amount from the new amount and avoid an effective date that falls inside the required notice window.
The current Idaho citation is § 55-304, not the older § 55-307 citation
Idaho's landlord-tenant chapter was reorganized in 2025. The appendix to the Attorney General's July 2026 manual lists § 55-304 as 'Change in lease terms and notice.' Older rental guides and saved legal references may still point to § 55-307, but that is no longer the current section number for this rent-change notice provision.
Max Rental Tools therefore uses the current § 55-304 reference and the July 2026 Attorney General manual. When a legal citation has been renumbered, updating the citation matters even if the practical 30-day notice guidance appears familiar, because users should be able to reach the current governing source instead of a stale section number.
Idaho does not publish a general statewide percentage ceiling for ordinary private rent
The Idaho Attorney General manual states that Idaho does not restrict the amount of rent, deposits or other charges that landlords may charge. For an ordinary private-market rental, Max Rental Tools therefore does not apply a general statewide percentage cap.
That is different from saying every proposed increase is lawful. Contract terms, notice timing, fair-housing protections, subsidized or assisted-housing program requirements and special housing statutes can independently affect a particular increase. Use the no-cap point only as one part of the analysis, not as a substitute for the lease and the applicable housing category.
A lease still matters before choosing the effective date
The Attorney General manual describes a lease as a contract and places rent increases within its lease-change discussion. Before serving an increase, review the signed lease for the rent amount, term, renewal language, notice provisions, fee provisions and any lawful mechanism for changing charges.
The statewide 30-day written-notice rule should not be read as permission to ignore a contractual restriction or a separate program rule. If the rental participates in subsidized housing or another regulated program, confirm that program's approval and notice requirements in addition to the Idaho residential notice rule.
Manufactured-home parks have a separate Idaho notice framework
The Idaho Attorney General manual separates manufactured-home park tenancies from the ordinary residential rule. For a manufactured-home park lease, a rent increase or decrease tied to increases or decreases in property taxes, utility assessments or other service fees included in the monthly rental charge may be handled with 30 days' written notice when the lease provides for that adjustment.
All other manufactured-home park rental increases generally require 90 days' written notice to the tenant. That property-type distinction is why an apartment-style 30-day answer should not automatically be reused for a mobile-home park lot or other tenancy governed by the Manufactured Home Residency Act.
Example: apartment notice versus manufactured-home park notice
Suppose an ordinary Idaho apartment landlord plans to increase monthly rent from $1,400 to $1,500. The current Attorney General manual supplies a 30-day written-notice baseline, so the landlord should document the delivery date and choose an effective date that gives at least that notice while also checking the lease.
Now suppose the rental is a manufactured-home park space and the increase is not a qualifying tax, utility or service-fee adjustment provided for in the lease. The Attorney General manual describes a 90-day written-notice rule for that park increase. The amount may look similar, but the property type changes the applicable notice path.
Use Max Rental Tools after confirming the property type and lease
Start with the Idaho state guide and rent-increase calculator to record the current rent, proposed rent, percentage change and planned effective date. Confirm whether the rental is an ordinary residential unit, a manufactured-home park tenancy or a subsidized/program-regulated rental before relying on a notice period.
Then use the Rent Increase Notice, Lease Renewal Notice, Month-to-Month Rental Agreement or Rent Ledger workflow that fits the tenancy. The Idaho Attorney General sources below are the public authority for the current statewide guidance summarized here; Max Rental Tools should help organize the facts and document path without replacing review of the signed lease or a special housing program's rules.
Common questions
How much notice does an Idaho landlord need to raise rent in 2026?
The Idaho Attorney General's July 2026 Landlord and Tenant Manual states that ordinary residential rent increases require written notice at least 30 days before the increase becomes effective. Special housing categories, including manufactured-home parks, can use different rules.
Does Idaho have a statewide rent-increase percentage cap?
The Idaho Attorney General manual states that Idaho does not restrict the amount of ordinary private residential rent a landlord may charge. Lease terms, notice rules, special housing programs and other laws can still affect a particular increase.
What Idaho Code section covers a residential rent-change notice now?
The July 2026 Idaho Attorney General manual lists Idaho Code § 55-304 as the current 'Change in lease terms and notice' provision. Older references to § 55-307 for that rule are stale after the chapter reorganization.
Can an Idaho landlord raise rent during a fixed lease?
A lease is a contract, so the signed agreement and any lawful rent-change or renewal terms must be reviewed. The 30-day statutory notice baseline should not be treated as authority to disregard the lease or a separate housing-program rule.
How much notice is required for an Idaho manufactured-home park rent increase?
The Idaho Attorney General manual says ordinary manufactured-home park rent increases generally require 90 days' written notice. A separate 30-day path can apply to lease-provided adjustments tied to property taxes, utility assessments or other service fees included in the monthly rental charge.
Should an apartment's 30-day Idaho rule be used for a mobile-home park lot?
Not automatically. Idaho's Manufactured Home Residency Act framework uses separate rent-increase rules, so the property type and reason for the increase must be identified before selecting the notice period.
Official sources
Idaho Attorney General — Landlord and Tenant Manual, July 2026Idaho Attorney General — Manuals and current consumer guidanceContinue your check
Use the state directory for current jurisdiction-specific rules, calculate the proposed increase, then prepare the appropriate rental document only after the legal-rule checks are complete.