Apartment Building Due Diligence Checklist for Los Angeles Sellers
Quick answer
Due diligence on a Los Angeles apartment building runs 15–21 days and covers four categories: income (rent roll, trailing-12, leases, deposits), physical (inspection, roof, plumbing, seismic retrofit status), legal and regulatory (rent-regulation status, code citations, permits, title), and third-party reports (appraisal, property condition, environmental). Sellers who assemble this package before listing close faster and defend price better, because most retrades come from documents produced late.
Income documents
This is where price is won or lost. A lender sizes the buyer's loan off documented net operating income; anything undocumented is treated as zero.
- Certified rent roll: unit, tenant, contract rent, lease start and end, deposit held, concessions.
- Trailing-12 operating statement, with capital items separated from operating expenses.
- Two years of Schedule E or property-level tax returns.
- All executed leases and amendments, including month-to-month notices.
- Ancillary income backup: laundry contracts, parking, storage, RUBS or utility billbacks.
- Delinquency and payment history for the trailing twelve months.
Physical condition
Buyers will inspect the building and every accessible unit. Surprises here become credit requests, so document what you know.
- Roof age and any warranty; recent repairs.
- Plumbing and sewer condition — a sewer camera scope is common on pre-1960 LA buildings.
- Electrical panel capacity and any knob-and-tube remaining.
- Soft-story seismic retrofit status and any outstanding City of LA order or compliance certificate.
- Capital-expenditure history by year with invoices where available.
- Deferred maintenance list — disclosing it is cheaper than having it found.
Legal and regulatory
In Los Angeles County this category causes more escrow delays than the physical inspection. Rent-regulation exposure is the first question every institutional buyer asks.
- Rent-regulation status per unit — City of LA RSO, AB 1482 or a local ordinance; always verify for the specific property with the governing city.
- Rent-increase history per unit, including any registration filings where required.
- Open code enforcement cases, citations, or building and safety orders.
- Permits for any converted, added or unpermitted space that generates income.
- Title report, survey if available, easements, and any recorded agreements.
- Existing loan documents, including prepayment penalty, yield maintenance or assumption terms.
Third-party reports the buyer orders
The buyer or lender orders these; a seller's job is to make them come back clean and on schedule by providing access and records promptly.
| Report | Ordered by | Typical timing | What can go wrong |
|---|---|---|---|
| Appraisal | Lender | 10–21 days | Low value resizes the loan and triggers a price conversation |
| Property condition assessment | Lender | 10–14 days | Large immediate-repair figure becomes a lender reserve |
| Phase I environmental | Lender | 10–14 days | Adjacent dry cleaner or gas station history extends to a Phase II |
| Zoning and code report | Buyer | 7–14 days | Legal unit count differs from the rent roll |
| Termite and pest | Buyer | 3–7 days | Section 1 work becomes a credit request |
How to shorten diligence
The fastest closings share one trait: the seller had the package ready before the property was marketed. Buyers price certainty. When diligence materials are delivered on day one instead of day ten, the buyer's timeline shrinks and the seller keeps leverage.
Practically, that means a shared document folder released at the offer stage, coordinated unit access scheduled in one or two blocks with proper tenant notice, and a single point of contact for questions.
Frequently asked questions
How long is due diligence on an LA apartment building?
Typically 15–21 days for buildings of 10 units or more, occasionally 30 days on larger or more complex assets. Loan funding then adds another 30–60 days depending on the financing.
Do I have to give buyers access to every unit?
Buyers normally inspect a sample plus all vacant units, and lenders may require a set percentage. Tenant entry requires proper written notice under California law, so access is scheduled rather than on demand.
What causes most price retrades in escrow?
Income that cannot be verified, an appraisal below contract price, a large immediate-repair figure in the property condition report, and rent-regulation exposure discovered late. All four are reduced by preparing documentation before listing.
Should I disclose deferred maintenance up front?
Yes. California disclosure obligations aside, disclosed items get priced into the offer once. Items discovered in diligence get renegotiated at the buyer's number, usually higher.
Keep reading