When does this form fit?
For a standard inflation-only manufactured home site increase, use the appropriate standard notice (RTB-45). Use RTB-11A when the proposed increase includes the park's allowed proportional change in qualifying local government levies and regulated public utility fees. For the year the increase takes effect, the annual inflation component is 2.3% in 2026 or 2.2% in 2027, plus any qualifying proportional component. Check for an updated official PDF if a form's printed example refers to an earlier year.
How the proportional amount works
In general, calculate the change in eligible local government levies and regulated utility fees for the common property of the entire manufactured home park, then divide that amount among the manufactured home sites as required by the official form and regulation. The form's detailed calculation uses previous- and current-year figures, number of sites and, where relevant, the number of sites assigned to a tenant. Ordinary business operating expenses or non-qualifying costs cannot simply be added to this proportional amount.
Prepare the supporting figures
- Record the park name and site address; landlord and tenant names; present rent; last legal rent-increase or initial rent-setting date; and the new effective date.
- Complete the local government levy columns and qualifying public-utility sections with the relevant prior and current figures. Use the calculation to arrive at the proposed rent, and check the monthly or other payment-period conversion.
- Complete the documentation section. The landlord must make the tax notices, levy invoices and utility bills available and provide copies on a tenant's request. The PDF asks where these records are attached, posted or otherwise accessible.
- Sign the notice, deliver the full form by an authorized service method, and preserve a copy and service evidence.
Three full rental months and 12-month spacing
A landlord must give three full rental months' written notice and cannot increase rent sooner than 12 months after rent was first established or the last lawful increase. For rent due on the first, a notice received in March generally allows April, May and June as the three complete months, with July 1 as the earliest increase date if the 12-month condition is satisfied. Remember that legal receipt can be later than the mailing date.
Common mistakes
Using RTB-11A for a combined home-and-site tenancy, using current-year charges without subtracting the prior year's charges, adding expenses that do not qualify as levies or regulated utility fees, failing to make the backup records available, or relying on a stale inflation example in a PDF for a later year's effective date.
Other RTB forms
For the original site tenancy agreement see RTB-5; for the standard manufactured home site increase see RTB-45.