When Minneapolis eliminated single-family-only zoning citywide, the decision drew attention far beyond Minnesota. It was the first large American city to do it, and both advocates and critics predicted transformation.
Neither prediction has been borne out. Six years of permit data shows a few hundred duplex and triplex units built or converted under the new rules — meaningful, and a small fraction of the housing the city added in the same period, most of which came from larger apartment buildings on commercial corridors.
The reasons are instructive and mostly not about zoning. Construction costs rose sharply. Interest rates rose more. And the economics of small multifamily construction are genuinely difficult: a triplex costs nearly as much to design, permit and finance as a much larger building, with a fraction of the units to spread those costs across.
"The zoning was necessary and it was never sufficient," a local housing economist said. "We removed the legal barrier. The financial barrier was always larger."
Where triplexes have appeared, they cluster. Neighborhoods with high land values and strong demand have seen the most conversions, because that is where the math works. Neighborhoods with lower values — the ones where advocates hoped new supply would expand ownership opportunities — have seen very few.
Small-scale developers describe financing as the binding constraint. Conventional residential lending handles up to four units; commercial lending starts effectively higher. A three-unit project falls into a gap where the borrower is treated as a commercial developer without commercial scale.
Several cities have responded with pre-approved plan sets, which reduce design and permitting costs by offering standardized designs already vetted for code compliance. Minneapolis has begun a version of this program, and early participation is modest.
The reform's defenders make a longer argument: zoning changes operate over decades. The buildings that define a neighborhood's character today were built under rules set generations ago.
Critics who predicted neighborhood upheaval have quietly stopped predicting it. The more substantive current criticism is different — that the reform absorbed political capital that might have funded subsidized housing directly, and that the units built at market rate do not reach the households with the greatest need.
Both things can be true. The city has permitted more housing per capita than most American peers over the last decade, and its rents have risen more slowly than the national average. Its lowest-income renters remain severely cost-burdened in numbers that have not improved.
