Critiques & Debates | Empirical Case
Does Missing Middle Actually Add Units?
The strongest argument for missing middle is empirical. Where comparable upzoning has been tried — Auckland 2016, Minneapolis 2018, Portland 2020, Tokyo for decades — measurable additional housing got built. The Auckland and Minneapolis evidence is the most directly relevant to BC's Bill 44 experiment.
Key Takeaways
- ✓Auckland Unitary Plan (2016): meaningful permit and completion gains in upzoned areas.
- ✓Minneapolis 2040 (2018): modest but detectable increases in two-to-four-unit approvals.
- ✓Effects compound over time — year four onward shows wider gaps.
- ✓BC is in year two of Bill 44; full data takes another two to four years.
The Four Most-Cited Studies
Auckland Unitary Plan (2016)
Greenaway-Smith and Phillips (2023) at the University of Auckland documented Auckland's upzoning. Building permits in upzoned areas roughly tripled relative to control areas, with material increases in completed dwellings four to seven years after the policy change. Total housing supply outpaced what would have occurred without the upzoning.
Minneapolis 2040 Plan (2018)
Minneapolis eliminated single-family-only zoning citywide in 2018. Subsequent research from the University of Minnesota and the Minneapolis Federation of Reserve documented modest but measurable increases in two- to four-unit housing approvals in the years after adoption. The total volume of new units remained smaller than the city's broader apartment construction.
Tokyo (long-term reference)
Tokyo's national zoning framework permits flexible mid-density construction across wide swaths of the city. Population growth has been absorbed without the price escalation seen in supply-restricted comparable cities. Cited frequently in BC SSMUH policy discussions as an end-state reference.
Portland and Seattle (incremental)
Portland's Residential Infill Project (2020) and Seattle's Low-Rise zone amendments produced detectable increases in small multiplex permits, smaller in scale than Auckland or Minneapolis but in the same direction. Documented by City of Portland and City of Seattle planning bureau data.
Why Auckland Is the Best BC Comparison
Auckland and Vancouver share several structural features. Both are mid-sized West Coast Pacific cities with strong constraints on greenfield expansion. Both have experienced multi-decade housing affordability decline. Both upzoned at a city scale rather than incremental neighbourhood scale. Both exempted heritage and natural-hazard land. The Auckland upzoning predates BC's by seven years, providing a multi-year window of post-policy data.
The Greenaway-Smith and Phillips analysis is the most cited academic treatment. Their finding — supply effects measurable from year three, widening through year seven — implies that BC\'s SSMUH evaluation should not draw conclusions until at least 2027–2028.
What the Early BC Data Shows
Vancouver\'s Open Data Portal logs SSMUH-class building permits issued under the R1-1 zone since adoption. Burnaby and Surrey publish equivalent data. The volume of permits is detectable but does not yet support definitive claims about completion rates, sustained absorption, or long-term supply effects. The data is consistent with the early phase of the Auckland trajectory — directionally positive, magnitude unclear.
Conclusions about whether Bill 44 has "worked" should wait for at least three more years of data. Premature conclusions in either direction misuse the empirical case that supports the policy.
Why Tokyo Is Cited (And Why It's a Stretch)
Tokyo's national zoning framework is the standard end-state reference in BC missing middle policy debates. The argument: Tokyo absorbed enormous population growth without the price escalation seen in supply-restricted comparable cities, and did so partly through flexible mid-density zoning across the urban area. The argument is supported by Japanese government housing data and OECD comparative work.
The stretch: Japan\'s zoning, construction industry, mortgage market, and demographic trajectory differ enough from BC that direct policy translation is risky. Tokyo is a useful aspirational reference, not a model that can be applied step by step.
Best For
- ✓ Readers wanting the empirical case behind missing middle policy.
- ✓ Researchers comparing BC's Bill 44 trajectory to documented international precedents.
- ✓ Anyone asked to take or refute a position on whether SSMUH "actually works."
Usually Fails When
- ✕ Drawing definitive conclusions from less than three years of BC post-policy data.
- ✕ Conflating permits issued with units completed.
- ✕ Treating Tokyo as a transferable policy model rather than an aspirational reference.
What To Verify Before Spending Money
- → The most current Auckland Unitary Plan analysis from the University of Auckland and Auckland Council research.
- → Minneapolis 2040 outcome data from the City of Minneapolis open-data portal.
- → BC permit and completion data from CMHC, BC Stats, and Vancouver's open data portal.
Frequently Asked Questions
Has BC published any data on Bill 44 unit production?
Is the Auckland comparison fair?
How does empirical evidence interact with displacement risk?
What does the 2040 Auckland trajectory suggest?
What would falsify the upzoning-adds-units hypothesis?
Where can I track BC SSMUH unit production over time?
Official Sources Referenced
Screen Your Lot for Missing Middle
Enter any BC address to see what Bill 44 SSMUH unit count, lot coverage, and FSR your parcel actually qualifies for.