How to Audit a San Francisco Rent Roll: Rent Control Status, Increases, Deposits, and Lease Records

Rates in this guide are set annually by the San Francisco Rent Board and are current for the period March 1, 2026 through February 28, 2027.

A San Francisco rent roll audit checks whether each unit’s stated rent, deposit, tenancy history, and supporting records match the rules that actually apply. Before a purchase or a management takeover, verify rent-control status, lawful base rent, allowable and banked increases, security deposits and interest, Rent Increase Licenses, leases, concessions, and actual tenant payments - then price the gaps you find.

Key Takeaways

• Verify rent-control status unit by unit. Building age alone does not answer every exemption question.
• Reconstruct the lawful base rent rather than assuming the amount on the current rent roll is correct. Base rent includes housing services such as parking and storage, and excludes temporary passthroughs and fluctuating charges.
• Check every annual and banked increase against the allowable percentage - 1.6% for 3/1/26–2/28/27 - the notice history, and the Rent Increase License status on the date the increase took effect.
• Reconcile security deposits, annual interest at 4.2%, leases, concessions, and side agreements against the tenant files.
• Pull the compliance file too: SB 721 inspection reports, resident manager arrangements at 16 or more units, and CAM reconciliations on mixed-use assets.
• Compare the rent roll against actual ledgers and payments before assigning value to scheduled income.
• Then translate every unsupported dollar into NOI, valuation, and debt service coverage - that is where a paperwork gap becomes a pricing question.

What a Rent Roll Audit Is and When You Need One

A rent roll is a snapshot. A rent roll audit asks whether the numbers on that snapshot can be supported by the tenancy records behind them.

In San Francisco, that distinction carries real money. Two units in the same building can have different tenancy histories, different lawful rents, different deposits, and different regulatory treatment - and nothing on the rent roll will tell you so.

The review earns its cost at three moments: before buying a property, when changing property managers, and before a refinance that depends on dependable rental-income records.

The objective is traceability. A San Francisco rent roll audit turns an owner-supplied rent schedule into a unit-by-unit record that ties back to leases, notices, filings, and payments.

What an Unsupported Rent Does to Your Underwriting

Scheduled rent that cannot be traced to a lawful base is not income. It is an assumption, and it compounds through every number that follows.

• An overstated rent overstates NOI dollar for dollar.
• At a 5% cap rate, every $1,000 of annual NOI that cannot be supported removes roughly $20,000 of value. Ten units carrying $150 a month of unsupported rent is $18,000 of annual NOI - about $360,000 of valuation.
• The same overstatement flows into debt service coverage. Where a lender underwrites to a 1.25x DSCR, NOI that arrives below what the rent roll promised can move a loan from approvable to resized, at the moment you have the least leverage to renegotiate.
• Where an increase is void for want of a Rent Increase License, the exposure runs backwards as well as forwards: the lawful rent is the pre-increase amount, and the overcharge may be recoverable by the tenant.

We run this arithmetic before the numbers reach a lender or a purchase agreement, not after.

Step 1: Confirm Each Unit’s Rent-Control Status

Rent-control status is a unit-level conclusion, not a building-level one. Start with the building and unit history rather than with assumptions.

The San Francisco Rent Board explains that many residential units built on or before June 13, 1979 are subject to both rent-control and eviction protections. Units first constructed after June 13, 1979 are generally exempt from the local rent-increase limits, although just-cause protections may still apply.

Check the first Certificate of Occupancy and the City’s property records, then review whether an exemption applies to the particular unit.

Single-family homes and condominiums require extra attention. Under the Costa-Hawkins Rental Housing Act, certain units may be exempt from local rent ceilings. The Rent Board notes that qualifying single-family homes and condominiums are generally exempt from San Francisco’s rent-increase limitations for tenancies beginning on or after January 1, 1996, but remain subject to applicable just-cause provisions of the Rent Ordinance. Exceptions can change that result.

For due diligence, record the conclusion and the document supporting it for every unit. “Building built in 1975” is useful evidence. It is not a unit-level analysis.

Step 2: Verify the Lawful Base Rent

Do not treat the “current rent” column on the seller’s spreadsheet as proof of lawful rent. Start with the rent lawfully established for the tenancy, then trace each permitted increase forward.

For rent-controlled units, the Rent Board calculates the annual allowable increase against the tenant’s base rent - and base rent is broader than many rent rolls assume. It includes housing services such as parking and storage. It excludes temporary passthroughs and fluctuating charges; a utility passthrough, for example, is not part of base rent when calculating an annual or banked increase.

Classify every recurring charge in the file before you calculate anything:

• base rent, including housing services such as parking and storage;
• Rent Board–approved passthroughs, such as capital improvement or operating and maintenance passthroughs;
• utility passthroughs and other fluctuating charges;
• concessions or temporary credits; and
• any other recurring amount charged to the tenant.

Both directions of that classification cost money. Treating a parking or storage charge as outside base rent understates the lawful increase and leaves income on the table year after year. Treating a utility passthrough as inside base rent overstates the increase and exposes it to challenge. Neither error is visible on a rent roll - only in the file.

When the historical calculation does not arrive at the rent currently being collected, investigate before relying on the income figure.

Step 3: Rebuild the Increase History, Allowable and Banked

Work through the tenancy chronologically. Identify the rent-increase anniversary date, each increase notice, the percentage or dollar amount imposed, and the resulting base rent.

For rent-controlled units, the allowable annual increase effective March 1, 2026 through February 28, 2027 is 1.6%, applied to the tenant’s base rent.

If an owner did not take a permitted annual increase when it became available, some or all of that increase may be “banked,” meaning it may potentially be imposed later subject to San Francisco’s rules. Do not simply add unused percentages together. Reconstruct what became available, what was used, and what remains.

The audit also has to confirm licensing. All residential property owners must report to the Rent Board’s Housing Inventory each year by March 1, and reporting a tenant-occupied unit is what generates the rent increase license. A current license must be on file before an annual or banked increase goes into effect. Rent Ordinance section 37.15 provides that an annual or banked increase imposed while the landlord is unlicensed renders the entire rent increase null and void.

Check license status for the year in which each increase took effect, not merely whether the property is licensed today.

Step 4: Check Security Deposits and Interest

Security-deposit records deserve their own reconciliation, because both California and San Francisco rules apply and they apply differently.

Under California Civil Code §1950.5, a landlord generally may not demand security exceeding one month’s rent in addition to the first month’s rent. A limited exception permits certain landlords who are natural persons, or qualifying LLCs made up entirely of natural persons, and who own no more than two residential rental properties totaling no more than four rental units, to collect up to two months’ rent; that exception does not apply where the prospective tenant is a service member. Deposits collected before July 1, 2024 are addressed separately under the statute.

For each unit, record:

• the original deposit collected;
• any later adjustment;
• the amount currently held;
• who presently holds it; and
• the history of interest payments or credits.

San Francisco Administrative Code Chapter 49 requires simple interest on qualifying security deposits held for at least one year. The Rent Board rate for March 1, 2026 through February 28, 2027 is 4.2%. Interest is generally paid annually on the tenant’s annual due date. Unpaid interest accumulates quietly and transfers with the tenancy - which makes it a buyer’s problem, not the seller’s.

California’s current deposit rules also require photographic documentation in specified situations. Since April 1, 2025, landlords must photograph the unit after possession is returned and before any repairs or cleaning for which deposit deductions will be claimed, then photograph it again after that work. For tenancies beginning on or after July 1, 2025, photographs are also required immediately before or at the start of the tenancy. Confirm the practice exists before a takeover, not after the first disputed deduction.

Step 5: Find Missing Leases, Addenda, Concessions, and Side Agreements

A spreadsheet cannot tell you every term of a tenancy.

Locate the signed original lease and every amendment, renewal, addendum, and written notice that changed the arrangement. Then look for the agreements that sit outside the main lease file.

Common examples include:

• temporary rent concessions;
• reduced rent promised by email;
• parking or storage arrangements;
• utility allocation or RUBS terms;
• pet agreements;
• roommate or occupancy amendments; and
• agreements concerning services included in the rent.

Also ask whether any material arrangement was made orally. An undocumented concession is often the explanation for why the amount collected differs from the lease or the rent roll.

During a management takeover, these details determine what the new manager should bill and what the tenant reasonably expects - and getting either wrong on the first statement is how a transition starts badly.

Step 6: Pull the Compliance File, Not Just the Rent File

Three record sets never appear on a rent roll and routinely change what a building costs to own.

SB 721 inspections.

California SB 721 requires inspection of exterior elevated elements - balconies, decks, stairways, and walkways - at rental buildings with three or more dwelling units. The first inspection deadline, extended to January 1, 2026 by AB 2579, has passed, and inspections recur on a six-year cycle. Confirm the report exists, read the findings, and price any required repairs. A missing report is simultaneously a compliance gap and an unbudgeted capital item.

Resident manager arrangements.

California Code of Regulations, Title 25, section 42 requires a resident manager for every apartment house with 16 or more units where the owner does not live on the premises. Verify that the arrangement is documented: which unit, what rent credit or wage, and how each is recorded. A manager’s unit credited informally distorts the rent roll and creates wage-and-hour exposure at the same time.

CAM reconciliations on mixed-use assets.

Where the building has retail or commercial space, confirm that the most recent common area maintenance reconciliation was completed and delivered, that pro-rata shares match the current leases, and that no tenant is carrying an unbilled or over-billed balance into the transaction.

Step 7: Reconcile the Rent Roll Against Actual Payments

Now compare the contractual record with the accounting record.

For each unit, match the stated rent against the tenant ledger and the deposits actually received. Investigate recurring differences instead of automatically classifying them as delinquency.

Look for:

• unpaid rent;
• partial payments;
• recurring credits;
• prepaid rent;
• unexplained write-offs;
• payments recorded against the wrong unit; and
• deposits shown on the rent roll but absent from the trust or transfer records.

Civil Code §1950.5 also addresses what happens to a security deposit when a landlord’s interest in a property is transferred. The outgoing landlord must generally transfer the remaining security to the successor or return it to the tenant, subject to the statute’s accounting requirements.

For a buyer, that makes deposit reconciliation part of closing diligence, not an administrative task for later.

San Francisco Rent Roll Audit Checklist

Use this as the working index for the audit. Every line should end in a document, not a conclusion.

Red Flags That Can Change a Deal

The findings that matter are rarely typographical. They are the discrepancies that determine whether scheduled income can be supported at all.

Watch for a current rent that cannot be traced to a lawful base, annual increases above the applicable allowance, a missing Rent Increase License on the effective date of an increase, unsupported banked increases, unpaid deposit interest, an absent SB 721 report, an undocumented resident manager credit, and lease terms that contradict the rent roll.

Rent Ordinance section 37.15 provides that an annual or banked increase imposed while a covered unit was unlicensed is null and void. In practice that means the lawful rent is the pre-increase amount and the overcharge may be recoverable - so the finding reaches both the valuation and the liability side of the deal.

A buyer needs to understand each discrepancy before assigning value to the scheduled rent. An owner changing managers needs the file corrected before the next increase cycle or tenant accounting, because the next notice inherits every error in the last one.

“The biggest surprises come from the gap between what the rent roll says and what the tenant file can prove. A current rent can look perfectly reasonable until you trace the base rent, the increase notices, the license history, the deposit interest, and the side agreements year by year.”

Tammy McNaught, CEO , BanCal Properties

Pre-Acquisition Rent Roll Review

We built this process for the two moments it decides something.

Before you close, we pressure-test the rent roll and the expense assumptions against what we are actually seeing on the ground in San Francisco, so your underwriting holds up rather than just your pro forma. You get a unit-by-unit read on rent-control status, traceable base rents, increase and license history, deposit and interest exposure, and the compliance records that never make the schedule.

At a management takeover, we correct the file before the next increase cycle or tenant accounting, so the first notice issued on your behalf is one that holds.

Thirty years in San Francisco and more than 100 properties under management is what makes the reconstruction fast: we have read these files before, and we know which gaps are clerical and which ones change the price.

Request a pre-acquisition rent roll review, or see how this work fits into our property management services.

Frequently Asked Questions

What is a rent roll audit?

A rent roll audit checks whether the rents, deposits, tenancy terms, and other information shown on a rent roll are supported by leases, notices, accounting records, and the regulations that apply. In San Francisco, the review also has to address unit-level rent-control status and the full history of lawful increases.

How do I check if a San Francisco unit is under rent control?

Start with the unit’s construction and occupancy history. The SF Rent Board says many units built on or before June 13, 1979 have rent-control and eviction protections, but exemptions exist, including rules affecting certain single-family homes, condominiums, and newer construction. Record the supporting document for each unit rather than a building-wide conclusion.

Are parking and storage charges part of base rent in San Francisco?

Generally yes. The Rent Board calculates the annual allowable increase on the tenant’s base rent, and base rent includes housing services such as parking and storage. Temporary passthroughs and fluctuating charges, including utility passthroughs, are excluded. Classify every recurring charge in the file before calculating an increase.

Do landlords in San Francisco have to pay interest on security deposits?

Generally, yes. San Francisco Administrative Code Chapter 49 requires simple interest on qualifying deposits held for at least one year, subject to the ordinance’s exceptions. The applicable rate is 4.2% for March 1, 2026 through February 28, 2027.

What documents should a rent roll include?

The rent roll should be supported by tenant ledgers, signed leases, amendments, rent-increase notices, deposit and interest records, concessions, parking or storage agreements, utility terms, and the applicable Rent Increase Licenses. On larger or mixed-use assets, add SB 721 inspection reports, resident manager documentation, and CAM reconciliations. The objective is to make every material number traceable to its source.

What happens if a previous owner raised rent above the legal limit?

Do not assume the higher amount becomes lawful because ownership changed. A tenant may challenge an unlawful increase through the Rent Board where the local ordinance applies, and Rent Ordinance section 37.15 renders an annual or banked increase null and void where it was imposed while the landlord was unlicensed. Review the full history and obtain advice from the Rent Board or qualified counsel before changing the rent or issuing a new notice.

Where This Fits in Managing the Asset

A rent roll audit is a picture of the record at one moment - useful before a purchase, essential before a refinance. What keeps that record clean afterwards is the day-to-day work: increases calculated and licensed on time, deposits and interest tracked, leases and side agreements filed as they happen, compliance reports current before anyone asks for them.

That is what our property management services do between audits. If you are buying, start with a pre-acquisition rent roll review. If you already own the building and the file has drifted, a management takeover is where we rebuild it.

This article is general information, not legal advice. Rent Board rates and state requirements change. For your specific situation, consult the San Francisco Rent Board or a qualified attorney.