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How to raise lot rent without losing the increase

By · Published April 14, 2026 · 7 min read

Raising lot rent is not hard. Raising it in a way that survives a challenge is where owners slip. A late notice, a wrong effective date, or no proof of delivery can wipe out an increase you were entitled to make, and hand the tenant months at the old rent.

This is the order of operations that keeps an increase clean.

Step 1: Find two numbers for your state

Before you write a word, look up two things:

The notice period. How many days ahead you must tell tenants. For mobile-home lots, 90 days is common. California, Florida, Oregon, and Washington all require 90 days for a space or lot-rent increase. Some states use 30 or 60. Assume nothing from the apartment rules, because manufactured-housing tenants often have their own law.

The cap, if there is one. A few states limit how much you can raise rent in a year. Oregon and Washington both cap mobile-home-park increases, and the Oregon number changes annually. Most states have no cap. Confirm which camp your state is in.

Write these two numbers down. Everything else is built on them.

Step 2: Count the notice from the right day

This is the mistake that voids the most increases. The notice period usually runs from the tenant's next rent due date, not the day you mail the letter.

Say your state requires 90 days and rent is due on the 1st. If you want the new rent to start November 1, the tenant needs the notice at least 90 days before that, so by early August, timed to a rent due date. Give yourself a cushion. Mail can be slow, and "close enough" is not a defense.

If your state caps the increase, do the cap math here too. A 6% cap on $525 is a ceiling of $556.50. Pick your new rent at or under that line, not a dollar over.

Step 3: Write a notice that says the four things

A rent-increase notice does not need to be fancy. It needs to be clear and complete. Include:

Some states require specific wording on top of this. Washington is the clearest example: its 2025 law makes you include language the state spells out, and the Department of Commerce publishes model wording. In a state like that, a plain letter is not enough, even if every number is right.

Keep the tone flat and factual. State the old rent, the new rent, and the date it changes. A notice is a legal document, not a place to explain or apologize. The calmer and clearer it reads, the harder it is to argue with.

Step 4: Deliver it the way your state accepts, and keep proof

A correct notice that you cannot prove you sent is a weak notice. If a tenant says "I never got it," you need an answer.

Check whether your state requires a particular delivery method. Some require or favor certified mail with a return receipt for mobile-home notices, which gives you a signature and a date. Even where regular mail or hand delivery is allowed, keep proof: a certified-mail receipt, a photo of the posted notice, a signed acknowledgment, or a delivery log. File it with a copy of the notice itself.

This one habit, proof of delivery, is what turns a dispute into a non-event. You pull the file, show the on-time notice and the receipt, and the conversation is over.

Step 5: Apply the new rent only on the effective date

Do not let the new amount show up on a bill early. If the notice says November 1, the October bill is still the old rent. Billing the new rate even one cycle early undercuts your own notice and gives the tenant a reason to dispute the whole thing. The effective date on the notice and the date your billing changes have to match exactly.

The short checklist

Run every increase through the same five steps:

  1. Look up your state's notice period and any cap.
  2. Count back from the effective date, timed to a rent due date, with a cushion.
  3. Write the notice with the four facts, plus any required state wording.
  4. Deliver it in an accepted way and keep proof.
  5. Change the billing only on the effective date, never before.

Do this and an increase is boring, which is exactly what you want. Skip a step and a routine raise turns into months at the old rent.

Where the tools fit

Our free rent-increase notice generator drafts a clean letter with the effective date and notice period in place, so you are not writing one from scratch. If you want the state-by-state caps and notice periods first, our post on Oregon and Washington rent caps walks through the two capped states and how California and Florida compare.

Lot Sidekick tracks each park's due day and rent history, so the earliest legal effective date is easy to work out, and the new rent flips on the right cycle and not before. You can manage all of this by hand. The steps are the same either way.

Sources

General information, not legal advice. Notice periods, required wording, delivery rules, and caps vary by state. Confirm your state's rules with a local attorney before you raise rent.

Lot Sidekick flags who's late and generates the notice in one click, with the fee schedule you set already applied. Send your spreadsheet and I'll set up your park, or see the live demo, or call (425) 405-0734.