Quick answer
Residential mortgage rules stop at four units. A five-unit building is multifamily, so lenders read it unit by unit, ask for a trailing operating statement, use an income-approach appraisal and often test net operating income as well as the simple rent-to-payment ratio. Fewer DSCR programs go past four units, and each sets its own limits.
Where the four-unit line comes from
The four-unit line is old and practical. Residential mortgage lending, the standard appraisal forms and much of the secondary market for home loans were built around housing of one to four units. Anything larger was treated as commercial real estate, financed by banks, insurance companies and specialty lenders with their own processes.
Investor DSCR programs grew out of the residential side. Most were designed for single-family rentals and 2-4 unit buildings, and many still stop there. Some wholesale lenders have extended rent-based underwriting to five-plus units, and others treat those buildings as small-balance commercial loans. Either way, the fifth unit puts the file in a different lane.
What the lender asks for at five units
On a fourplex, a lender can often work from a lease for each unit or an appraiser’s rent schedule on a standard form. On a five- to ten-unit building, the lender wants a fuller picture of how the building operates.
- A unit-by-unit rent roll: unit number, bedrooms and baths, tenant or vacant, lease start and end dates, current rent, deposit and last increase.
- Copies of every lease, including month-to-month tenancies.
- A trailing operating statement, commonly twelve months, showing rent collected and every operating expense.
- The property tax bill, the insurance declarations or quote, and utility bills for owner-paid services.
- Entity documents if the building is held in an LLC or partnership.
None of this is unusual for a building owner who keeps good books. It is simply more than a fourplex buyer may be used to providing.
How the appraisal changes
Appraisals of 2-4 unit properties lean mainly on comparable sales of similar small properties nearby. For a five-plus unit building, the appraiser leans on the income approach: estimate the building’s market rent and operating costs, arrive at net operating income, and convert that income into value using what similar small apartment buildings have sold for.
The practical effect is that the building’s own numbers carry more weight. A building with strong, documented rents and controlled costs can appraise well. A building with below-market rents, heavy owner-paid utilities or deferred maintenance may appraise lower than a quick look at neighborhood sales suggests.
Two coverage tests instead of one
The simple DSCR test divides monthly rent by the monthly payment: principal and interest plus property taxes, insurance and any association dues. Many 5-10 unit programs use that test. Some also look at net operating income, which subtracts the costs of running the building before comparing income with debt.
Those costs can include owner-paid water, sewer, trash and common-area electricity, repairs and maintenance, a management allowance even if you manage the building yourself, and a vacancy allowance. A building that passes the simple test comfortably can be tight on the NOI test. We run both before a file goes to a lender, so neither result is a surprise.
Fewer programs, more variation
Because fewer DSCR lenders go past four units, the choice of program matters more. Each lender sets its own rules on maximum unit count, eligible locations, building condition, minimum loan size, required reserves and how it treats mixed-use space. One program may accept a ten-unit building in a dense urban core. Another may stop at eight units or decline buildings with any commercial space.
This is where a broker earns its keep. We arrange and shop financing from wholesale lenders, and on 5-10 unit buildings the main work is matching the building to the programs whose rules it actually fits, before an appraisal is paid for.
What stays the same
The core idea does not change. The building has to carry its own debt. Lenders check your credit and reserves and want to see that you can manage rental property. The loan is business-purpose, so the building has to be non-owner-occupied, and every unit has to be rented to tenants. If you or a family member plan to live in one of the units, this is not the right financing path.
In California, the same state rules apply at four units and at ten: the Tenant Protection Act rent cap on covered housing, local rent programs where they exist, and Proposition 13 reassessment when you buy. The larger the building, the more those rules show up in the rent roll.
A checklist for the move from fourplex to five units
If you are moving up from fourplexes, these steps will make the first five-unit file easier.
- Ask the seller for the rent roll, leases and operating statement before you write an offer.
- Rebuild the tax line at your purchase price and get an insurance quote.
- Run both the simple coverage test and a net operating income estimate.
- Check for unpermitted units and do not count their rent.
- Confirm which rent program, if any, covers the building.
- Plan reserves for the larger building and any other properties you own.
Frequently asked questions
Can I use a DSCR loan on a 5-unit building?
Often, yes. Some wholesale programs extend DSCR-style underwriting to five-plus units, and others treat these buildings as small-balance commercial loans. Expect a rent roll, leases, an operating statement and an income-approach appraisal.
Why does my 5-unit lender want an operating statement when my fourplex lender did not?
At five units the building is underwritten as multifamily, and lenders and appraisers look at operating costs as well as rent. The operating statement shows what the building costs to run.
Do all DSCR lenders finance 5-10 unit buildings?
No. Many DSCR programs stop at four units. Those that go further set their own limits on unit count, location, condition and loan size.