Boise's small multifamily ranges from 1910s houses split into units in the North End to 1970s fourplexes on the Bench and new side-by-side duplexes in Nampa and Kuna. The city's updated zoning code has opened more lots to two to four units.
In short: LendingStreet finances Boise and Treasure Valley duplexes, triplexes and fourplexes with DSCR loans that qualify on the combined rent of all units, with no W-2s or tax returns. Loans start at $150,000, purchases go up to 80% LTV and the minimum credit score is 620. Because Boise prices are high relative to rents, many 2-4 unit files qualify best at 65% to 70% LTV.
The North End and East End have older homes converted to duplexes and triplexes, plus small apartment houses near downtown. They rent at a premium for walkability, but prices are among the highest in the city.
The Bench, including the Vista and Depot Bench areas, and West Boise have many 1960s to 1980s duplexes and fourplexes that rent to families, students and workers. Garden City has older duplexes and newer infill. In Canyon County, Nampa and Caldwell have newer side-by-side duplexes at lower prices, often with stronger ratios.
Tenant demand comes from Boise State students and staff, the two hospital systems, a growing tech and manufacturing base, and people who moved to the valley and rent while they look for a home. Two-bedroom units near the university and the Bench corridors lease steadily.
Boise adopted a new zoning code that took effect in late 2023, which broadened where duplexes, triplexes and other small multi-unit housing can be built and allowed more units near transit corridors and activity centers. That has encouraged infill projects across the city.
Lot size, setbacks, parking and design standards still apply. If you are buying a newly built duplex or triplex, confirm it has final inspections and certificates of occupancy for every unit. Garden City, Meridian and Nampa each have their own codes.
Older converted houses in the North End deserve extra review. Some were divided into units decades ago without permits, and an unpermitted unit may not count toward rent. Ask for the permit history and confirm the legal unit count with the city.
Each area offers a different balance of price, rent and maintenance. Lenders use actual leases or a market rent estimate for every unit.
Older Boise buildings often come with below-market leases that can be raised over time, while newer Canyon County duplexes come with lower maintenance and higher ratios today.
| Area | Typical stock | Tenants | Watch for |
|---|---|---|---|
| North End and East End | Converted houses, small apartment houses | Professionals | High prices, older systems |
| Bench and West Boise | 1960s-80s duplexes and fourplexes | Families, students, workers | Roofs, parking, deferred upkeep |
| Garden City | Older duplexes, new infill | Mixed | Flood zones near the river |
| Nampa and Caldwell | Newer side-by-side duplexes | Families, commuters | HOA rules, utility setup |
This example is illustrative and not a quote. An investor buys a duplex on the Boise Bench for $600,000. Each unit rents for $1,900 a month, for $3,800 combined. Taxes, without the homeowner's exemption, are budgeted at $280 a month and insurance at $130.
At 80% LTV the loan would be $480,000, with estimated principal and interest of about $3,356 on a 30-year term, a payment of about $3,766 and DSCR of about 1.01x, barely over the minimum. At 70% the loan is $420,000, principal and interest is about $2,937, the payment about $3,347 and DSCR about 1.14x. At 65%, DSCR rises to about 1.21x. The investor chooses 70%.
The same duplex in Nampa might sell for well under $600,000 with rents only modestly lower, which is why many investors compare Canyon County before buying in Boise. In Boise, the case for the property rests more on location and long-term value.
Idaho's homeowner's exemption applies only to a primary residence. A duplex where the seller lived in one unit may have carried the exemption, and it will come off after you buy. Ada and Canyon counties reassess annually, so plan for changes.
Idaho does not charge a real estate transfer tax, which keeps closing costs lower. Confirm the expected non-exempt bill with the county assessor before you rely on the numbers.
Idaho has no rent control, and state law generally prevents cities from adopting it. Landlords must give written notice of rent increases under state law; check the current notice period. Rents in the Treasure Valley rose quickly in the early 2020s and have since moderated in many areas.
Underwrite on rents supported by comparable leases rather than peak-era asking rents, especially for newer duplexes competing with new apartment complexes.
Keep written leases, move-in reports and copies of every notice. A clean rent roll speeds up the DSCR file and supports value at the next refinance.
Most of the valley has moderate insurance costs, but properties near the foothills carry wildfire exposure. Older duplexes with original wiring or roofs may need updates for some insurers.
Properties near the Boise River in Garden City and parts of Boise may sit in mapped flood zones, where flood insurance is required. Separate meters for each unit keep utility costs with tenants and make net income easier to predict.
Irrigation is a local detail worth checking. Many Treasure Valley lots have irrigation district water rights and assessments, which add a small annual cost and keep yards green at lower utility expense.
Some Boise and Garden City buildings have five to eight units, which are still residential for DSCR purposes, though maximum LTV can be lower and varies by program; see our Boise 5-8 unit page. Nine or more units is commercial.
If you own five or more small properties, a blanket portfolio loan can combine them. Send the address, price, leases, tax bill and insurance quote and LendingStreet will run the numbers at a few loan amounts. Call (877) 298-1001 or use the form below to get a quote.
Yes. The loan qualifies on combined rent from both units, with no W-2s or tax returns.
Boise prices are high relative to rents, so lower leverage reduces the payment enough for rent to clear 1.0x.
No, and state law generally prevents cities from adopting it. Rents are set by the lease and the market.
Yes, once construction is complete with certificates of occupancy for each unit.
They often have stronger rent-to-price ratios. We finance 2-4 unit rentals across the Treasure Valley.
Yes. Rate-and-term and cash-out refinances are available, with cash-out up to 75% LTV. Seasoning rules vary by program.
No. Our investor loans are business-purpose loans on non-owner-occupied property. Every unit has to be held as a rental.
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