Santa Monica Rent Control and Rent Increase Guide for Owners, 2026–2027

Santa Monica rent increases are easy to get wrong because the percentage is only one part of the decision.

For 2026, the city's general adjustment is 2.6% for eligible rent-controlled units. The ceiling is $70 when the old Maximum Allowable Rent, or MAR, is $2,674 or more. Before you send a notice, confirm the unit's MAR, tenancy date, registration, fees, citations, and first ledger entry.

The notice should be the final step, not where the calculation begins. This guide gives owners and managers the checks in the order they should happen. It is for Santa Monica residential rentals, including long-term hold owners, inherited-property owners, self-managing owners, and small-to-mid multifamily teams. Commercial leases and unit-specific disputes need a separate review.

The short answer for 2026

If the unit and tenancy qualify, the 2026 Santa Monica general adjustment is 2.6% of the old MAR. The maximum increase is $70 when the old MAR is $2,674 or higher. The adjustment is effective September 1, 2026, after the required notice period.

The City's Maximum Lawful Rent page and 2026 Notice of Change in Terms of Tenancy should control the calculation and form selection. Santa Monica's Rent Control in Santa Monica overview explains the program and its local terms.

These examples show the math. They do not decide the lawful rent for a specific unit. Use the official MAR record and the current form's rounding instructions for the actual notice.

Start with the unit, not the percentage

A Santa Monica address does not automatically qualify for the annual adjustment. First establish that the unit is covered, then confirm that the tenancy meets the current eligibility conditions.

For the 2026 general adjustment, the official guidance identifies these conditions:

• The tenancy began before September 1, 2025.
• The tenancy is properly registered with the Rent Control Agency.
• The property has no uncorrected health, safety, or housing-code citations.
• Required registration fees and penalties are paid by the stated deadline.
• The owner is complying with the Rent Control Law.
• The written notice is served in compliance with applicable notice requirements.

If the file does not establish those facts, pause the increase. A market-rent assumption or last year's notice is not a substitute for the missing record.

For the statewide framework that sits beside Santa Monica's local rules, see Coastline's California rent increase caps guide. The local rule and the statewide rule both need to be considered when they apply.

What Santa Monica rent control changes

Santa Monica rent control can limit the rent charged for a covered residential unit through a Maximum Allowable Rent and other lawful components. Coverage is specific to the property, unit, and tenancy.

The MAR is the rent ceiling used for the annual general adjustment. The total maximum lawful rent can also include an eligible registration-fee pass-through and property-tax-related surcharges. That distinction matters because the number in the City's lookup tool may not equal the total amount being charged.

Use Santa Monica's official rent lookup tool as a starting record. Then compare it with the current lease, renewal or amendment, registered tenancy start date, prior notices, effective dates, ledger, credits, recurring charges, and any agency decision that changed the allowable amount.

The useful question is simple: can another person follow the file from the old lawful amount to the proposed new amount without guessing? If the answer is no, the calculation is not ready for service.

Run the calculation in the right order

The cleanest workflow is a short sequence. Each step answers a different owner question.

1. Confirm that the unit is subject to Santa Monica rent control.
2. Confirm the current MAR and the last lawful amount.
3. Confirm that the tenancy qualifies for the 2026 general adjustment.
4. Calculate the new MAR using the current official formula.
5. Add only eligible registration-fee and property-tax-related amounts.
6. Select the correct notice form, serve it on time, and update the ledger on the supported effective date.

The owner or authorized manager should own the coverage decision. A second person should check the calculation and form. The person responsible for the ledger should verify the first affected charge.

That separation is practical risk control. It keeps a correct percentage from becoming an incorrect notice or an unexplained ledger change.

Keep fees and surcharges separate

For the 2026–2027 fiscal year, Santa Monica lists an annual registration fee of $240 per controlled unit. Up to one-half may be passed through to the resident in equal monthly installments with proper notice. When the pass-through is available, that is $10 per month.

Property-tax-related surcharges follow a different test. The official guidance limits the amount to the lowest of the actual prorated amount, 4% of the MAR, or $35 per month. Eligibility also depends on the tenancy and property reassessment history.

Under the cited Regulation 3120 rules, property-tax-related surcharges other than the registration-fee pass-through are not available when the tenancy began or the property was reassessed on or after March 1, 2018. Review the Santa Monica Rent Control Charter and regulations and check the actual property and tenancy history before adding a surcharge.

Keep the MAR adjustment, registration-fee pass-through, and any surcharge as separate lines in the working file and on the applicable notice. A single line labeled “rent increase” hides the decision trail the owner may need later.

Use the right notice and service timing

Santa Monica publishes a 2026 Notice of Change in Terms of Tenancy. The form states that the increase takes effect 30 days after service and not before September 1, 2026.

The City also identifies a simplified form for certain tenancies that began on or after March 1, 2018 or properties sold or reassessed on or after that date. Use the current official instructions to select the form. Do not reuse last year's form because the annual adjustment, ceiling, registration fee, and certification language can change.

Coastline's California rent increase notice and service guide covers the broader notice and proof-of-service controls that sit beside the Santa Monica form.

The service file should preserve the completed notice, source MAR record, calculation worksheet, lease and registration evidence, proof of service, effective date entered in the ledger, and any resident communication that explains the components.

Keep a plain-language explanation separate from the formal notice. It can help a resident understand the change, yet it should not replace the required notice language or proof of service.

Make the ledger tell the same story

Treat the rent change as a controlled record update. The goal is a ledger that tells the same story as the notice and the lease file.

Before service

• Confirm the unit, resident, lease, and tenancy start date.
• Confirm the current MAR and last lawful amount.
• Reconcile concessions, credits, abatements, and recurring charges.
• Confirm registration, fee, citation, and compliance status.
• Record the proposed effective date and the source of each component.
• Have a second person check the math and form selection.

After service

• Save the served notice and proof of service in the lease file.
• Enter the effective date, not the service date, as the recurring-charge change date.
• Keep the MAR adjustment, fee pass-through, and any surcharge distinguishable.
• Reconcile the first ledger after the new amount takes effect.
• Document a correction instead of overwriting the original decision.

This is a controlled workflow recommendation. It is not a statement of Coastline's approved AppFolio SOP or field-permission design.

Three owner situations that need extra care

An inherited or self-managed property with missing records

Start by rebuilding the file. Find the MAR record, tenancy start date, prior notices, registration evidence, and ledger history before choosing a percentage. If a critical record is missing, mark the gap and hold the notice.

A property that changed hands or was reassessed

Purchase and reassessment history can affect surcharge eligibility and the correct form. Keep the closing or reassessment record with the rent-control file so the calculation does not depend on memory.

A small or mid-size multifamily portfolio

Use one repeatable checklist, then keep the evidence unit-specific. A portfolio process helps with consistency. It does not make one unit's MAR, tenancy date, or surcharge history interchangeable with another's. For operating support beyond the rent-change file, see Coastline Equity's Santa Monica multifamily property management page.

Check the file before service

Before service, the owner-side file should answer “yes” to each applicable item:

• The unit's rent-control status is confirmed.
• The current MAR report or lookup result is saved.
• The tenancy start date and property reassessment history are documented.
• The 2026 general-adjustment eligibility conditions are checked.
• The MAR calculation follows the current official form.
• The registration-fee pass-through is separately supported.
• Any property-tax surcharge is separately supported and capped.
• The correct notice form is used.
• Service timing supports the intended effective date.
• A second person checked the calculation and form.
• The lease file and ledger update plan are ready.
• The first post-effective ledger entry has an assigned verification owner.

If any answer is “no,” hold the notice until the missing evidence is resolved. Coastline's California rent increase owner checklist provides a reusable pre-service checklist for the broader file review.

Common mistakes Santa Monica owners can avoid

Using market rent instead of the MAR

The lookup tool may show the MAR while the total lawful rent includes other eligible components. Confirm what each number represents before preparing the notice.

Applying 2.6% to every unit

The general adjustment applies only when the unit and tenancy meet the current eligibility requirements. A Santa Monica address alone does not establish eligibility.

Adding a surcharge without checking the March 1, 2018 rule

Tenancy start date and reassessment history can change which surcharges are available. Preserve the source record used for that decision.

Updating the ledger too early

The ledger should follow the effective date supported by the served notice. A premature recurring-charge change creates a reconciliation problem even when the math is correct.

Treating last year's process as this year's answer

Refresh the source record each year. The adjustment, ceiling, registration fee, form, and deadlines can change.

Questions owners ask

What is Santa Monica's 2026 rent-control increase?

It is 2.6% for eligible controlled units with an old MAR below $2,674. The adjustment is capped at $70 when the old MAR is $2,674 or higher. It is effective September 1, 2026, after the required notice period.

What does MAR mean in Santa Monica?

MAR means Maximum Allowable Rent. It is the rent ceiling used in the annual adjustment calculation. It may not equal the total maximum lawful rent when eligible fee pass-throughs or surcharges apply.

Can an owner add the Santa Monica registration fee?

The 2026–2027 annual registration fee is $240 per controlled unit. Up to half may be passed through as a monthly amount when the requirements and notice are satisfied. The official guidance should control the unit-specific calculation.

Can an owner add property-tax-related surcharges?

Sometimes. Eligibility depends on the tenancy start date, property reassessment history, actual tax amounts, the cap, and required notice. Surcharges other than the registration-fee pass-through are restricted for qualifying post-March 1, 2018 tenancies or reassessments.

Where can an owner look up the MAR?

Santa Monica provides an official How to Look Up a Rent tool. Use it as a starting record, then reconcile it with the registered tenancy, lease file, ledger, and any agency decision.

The next useful step

If the file needs a second check before service, use Coastline Equity's existing Rent Increase Pre-Notice Review. The review helps organize the rule, timing, rent history, local risk, documentation, and resident communication before a rent increase reaches a resident.

Owners evaluating a broader management transition can also review Coastline's Southern California property-management resource.

This article is general educational information based on the cited public sources. Santa Monica rules, forms, amounts, and deadlines can change. Confirm the current official guidance and the facts of the specific unit before serving a notice.