Mixed-Use Property Loans

A mixed-use loan is a commercial mortgage on a building with both commercial and residential space. The lender adds the two income streams, applies a vacancy assumption to each, and sizes the loan as the lower of a loan-to-value cap and the amount the combined net operating income repays at its minimum DSCR. In our example, $111,600 of combined NOI supports $1,118,000 on a $1,600,000 building. An owner-occupant whose business uses at least 51% of the building may use SBA 504 or 7(a) instead.

Only for a small building that is mainly a home. Residential lenders generally finance a one- to four-unit property with a modest business space when you live there and the property stays primarily residential. Buildings with significant storefront or office space — or five or more apartments — need a commercial, DSCR or SBA loan.

With a construction loan sized on total cost, usually 65–80% LTC, funded in draws and repaid by a permanent loan once both the commercial and residential space lease up. An owner-occupant building for its own business can use SBA 504 if it will occupy at least 60% of the new building at completion. Lenders want pre-leasing on the commercial space and a realistic residential lease-up schedule.

Not necessarily. The two income streams (commercial + residential) mean one vacancy does not stop all the rent, though lenders underwrite each part with its own assumptions. The key challenge is finding lenders comfortable underwriting both components together. Portfolio banks and some DSCR lenders regularly do.

It is a lender convention, not a law: many lenders treat a building that is mostly commercial by square footage as commercial property, and one that is mostly residential may qualify for residential or portfolio loans, depending on the lender. SBA has its own rule: your business must occupy at least 51% of the whole building’s rentable space (60% for new construction), and residential units count as leased space.

SBA loans are for business use. The residential units count as leased space, not business space, in SBA’s 51% occupancy test, so an apartment you live in does not help you qualify — ask the lender how it treats an owner’s residence. However, if you operate your business on the ground floor and rent the residential units above to tenants, that's the standard SBA mixed-use structure. Separate residential financing may be needed for a live-work arrangement.

Combined. Commercial rents + residential rents - total operating expenses = combined NOI. Lenders may apply different vacancy assumptions to each component (e.g., 5% for residential, 10% for commercial). The combined NOI is then used for DSCR calculation.

Diversified income reduces risk — if a commercial tenant leaves, residential income continues and vice versa. Some cities also offer zoning or density incentives for mixed-use projects — check the local code.

Mixed-use requires zoning that permits both commercial and residential use. Many cities have mixed-use zoning districts; names vary by city. Some properties may need a conditional use permit. Verify zoning before purchase — lenders require confirmation.