A rent roll is the seller’s list of every unit, tenant, rent amount, deposit and lease date on a rental property. When you buy a tenant-occupied duplex or house with an ADU in California, the rent roll is a claim, not proof. Verify it with the leases, rent deposit records and, when you can, signed tenant estoppel certificates before your contingencies expire.
Most of the bad deals I see weren’t bad properties. They were bad numbers: a rent roll that counted an unpermitted bedroom, or rents the tenants weren’t actually paying. Here’s how I review one for buyers.
What a Rent Roll Should Include
| Field | Why it matters |
|---|---|
| Unit and bed/bath count | Should match the permitted count, not what’s being used |
| Tenant name(s) | Ties to the lease and estoppel |
| Current monthly rent | What’s actually paid, not the “market” rent |
| Security deposit held | Transfers to you at closing |
| Lease start and end date | Month-to-month vs fixed term |
| Last rent increase date | Shows how much you can raise under AB 1482 or local rent control |
| Utilities paid by tenant vs owner | Owner-paid utilities cut your cash flow |
| Concessions, side deals, arrears | Free parking, pets, unpaid rent and promises the seller made |
A Real Example: When the Rent Roll Is Wrong
A North Long Beach detached duplex closed in June 2026 at $795,000. The listing’s pro forma showed the front unit at $3,250. But that number counted an unpermitted bonus room as a third bedroom. The rent I’d underwrite for a legal 2-bed is about $2,800. The rear unit’s long-term tenant pays $2,637.
| Listing pro forma | Verified rents | |
|---|---|---|
| Total rent | $5,887/mo | $5,437/mo |
| Payment at 25% down, 7.75% (P&I, tax, insurance) | About $5,250/mo | About $5,250/mo |
| Monthly cash flow before repairs and vacancy | About +$637 | About +$187 |
Same property, same loan. The difference between “cash flows nicely” and “basically breaks even” was one line on the rent roll. Breaking even can still work if you’re holding for appreciation or adding an ADU, but you need to know which deal you’re buying. I break down this property in Are Duplexes a Good Investment? and how I evaluate Long Beach multi-units in How to Evaluate a Multi-Unit Property in Long Beach.
How to Verify a Rent Roll
- Get every lease and amendment. Match rent, dates and deposit to the rent roll line by line.
- Ask for 6–12 months of rent deposits. Bank statements or property management ledgers show what’s actually collected.
- Check permits against the unit count. If a unit or bedroom isn’t permitted, don’t underwrite its rent. See Buying a House With an Unpermitted ADU.
- Request tenant estoppel certificates. More on these below.
- Confirm rent control status. Check whether AB 1482 or a local ordinance applies, and how much rent can rise.
- Walk every unit. Occupancy, condition and who actually lives there should match the paperwork.
What Is an Estoppel Certificate?
A tenant estoppel certificate is a short form the tenant signs confirming their rent, deposit, lease dates and any side agreements. Once signed, the tenant generally can’t later claim different terms. California’s Evidence Code § 622 treats the facts recited in a signed written instrument as conclusively true between the parties.
The catch: residential tenants usually only have to sign one if their lease requires it. Many older leases don’t. When a tenant won’t sign, I lean harder on the bank deposits and leases, and sometimes ask the seller for a written representation of the rent roll. This tenant attorney’s overview explains the tenant side.
Security Deposits at Closing
Under Civil Code § 1950.5, when a rental is sold, the seller must either transfer each tenant’s deposit to the buyer or return it to the tenant, and notify the tenant. In practice, deposits are credited to the buyer in escrow. If the rent roll’s deposit numbers are wrong, you inherit the liability at move-out.
Rent Control: What the Rent Roll Won’t Tell You
- AB 1482: caps increases on many older units and requires just cause to end most tenancies. Single-family homes and condos can be exempt with the right notice. See AB 1482 and New ADUs.
- Local rent control: LA’s RSO, Santa Ana’s ordinance and others are stricter. Costa-Hawkins limits which units they can cover.
- Below-market tenants: a long-term tenant paying well under market may not leave on your timeline. Ending a tenancy has strict rules: How to Legally Terminate a Tenancy in 2026.
Buying a House With Tenants Plus ADU Potential
Tenant-occupied properties often sell at a discount because fewer buyers want them. If the lot can take an ADU, you can build in the backyard while the existing tenants keep paying, then raise the property’s total rent without touching their lease. I explain the seller side of this in Can You Sell an ADU Property With an Active Tenant? and what to check before you buy in Buying an Investment Property Checklist.
Frequently Asked Questions
What is a rent roll in real estate?
A list of every unit on a rental property with its tenant, rent, deposit and lease dates. Buyers and lenders use it to underwrite income.
Do tenants have to sign an estoppel certificate in California?
Usually only if the lease requires it. Without that clause, a residential tenant can decline.
What happens to security deposits when a rental is sold?
The seller transfers them to the buyer or returns them to the tenants, and notifies the tenants. They’re normally credited to the buyer in escrow.
Can I raise the rent after buying a property with tenants?
Only within the lease terms and any rent cap that applies, such as AB 1482 or a local ordinance. The existing lease stays in force after the sale.
Get a Second Set of Eyes on the Numbers
I review the rent roll, leases and permits on every tenant-occupied property my buyers consider, and run the monthly payment against verified rent before we write an offer.
👉 Book a buyer ADU consult call to go through your options with Dylan
Prefer to talk now? Call Dylan Serna, ADU Realtor at 714-860-2868.
Dylan Serna | The ADU Realtor | eXp Realty | DRE #02217359
This post is general information, not legal advice. Payment math assumes 25% down at 7.75% on a 30-year loan, 1.2% property tax and $2,200/yr insurance; confirm figures for your own deal.
