The Case for Converting Commercial Real Estate to Housing

Walk through almost any American downtown and you’ll see it: half-empty office towers, shuttered storefronts, lobbies that feel more like museums than workplaces. Remote work hasn’t just dented demand for office space—it’s gutted it, while e-commerce keeps chewing away at brick-and-mortar retail. At the same time, Freddie Mac puts the country’s housing shortage at 3.8 million units. Rents and sale prices keep climbing, and families keep getting squeezed. Turning that surplus of underused commercial square footage into places people can actually live is a plain, evidence-backed way to chip away at both problems at once—breathing life back into downtowns and putting roofs over heads.

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The Scale of the Opportunity

Nationally, office vacancies hit 19.6 percent in the last quarter of 2023—the worst showing since 1979, according to Moody’s Analytics. In cities like San Francisco, Chicago, and Washington, D.C., the numbers look even grimmer. Meanwhile, the National Low Income Housing Coalition counts a gap of 7.3 million affordable rental homes for people at the very bottom of the income ladder. The mismatch is hard to look away from: millions of square feet gathering dust while millions of households scramble for stable shelter.

Now, no one pretends every commercial building is a good flip. But a decent slice is. Work by the National Bureau of Economic Research suggests roughly 15 percent of office buildings in the country’s 105 largest cities could physically and financially work as housing. That pencils out to something like 1.3 billion square feet—enough, by some estimates, for north of 400,000 new apartments. The best bets tend to be older structures: modest floor plates, windows that open, plumbing stacks already in place. And the opportunity sits mostly in central business districts where transit lines, utilities, and schools are already built, so you’re not begging for big new infrastructure checks.

Economic Logic and Market Signals

The math on conversions has gotten friendlier because office values have slid. A 2023 study out of NYU and Columbia found office building prices had dropped an average of 45 percent from their pre-pandemic peaks. Cheaper acquisition costs tilt the feasibility math in favor of a gut rehab, especially if the finished apartments can fetch a solid premium in a well-located downtown neighborhood.

Compare the price tags. New ground-up construction in tight urban markets can easily run $400 to $600 a square foot, sometimes more. Conversions, depending on the building’s bones and layout, usually land between $200 and $400 per square foot. Yes, you’re wrestling with adding plumbing stacks, hitting modern energy codes, and shoehorning daylight into deep spaces—but you’re also skipping the cost of new structural framing, foundations, and dirt. Developers like PMG and Vanbarton Group are already taking swings at big conversion projects in New York, Los Angeles, and Denver, betting that demand for downtown living will outlast the current office funk.

Policy Levers That Make Conversions Viable

Markets alone won’t squeeze out the full potential. Lots of cities still have zoning that treats residential as forbidden fruit in commercial zones, or demands ground-floor retail, or caps density. Parking minimums are a quiet killer: one structured space can tack $30,000 to $50,000 onto a project’s budget. Permitting crawls along for years, and building codes written for brand-new construction often clash with the messy reality of adaptive reuse.

Some cities have started rewriting the rulebook. In 2023, New York City launched its Office Conversion Accelerator to speed approvals for eligible buildings, and the mayor’s office flagged 72 million square feet of office space as potential conversion material. Calgary’s downtown office conversion program, started in 2021, dangles grants of up to $75 per square foot; it’s already greenlit 13 projects that should yield over 2,300 units. Los Angeles passed an adaptive reuse ordinance that fast-tracks approvals for buildings older than 15 years, and Chicago has proposed something similar for the LaSalle Street corridor.

Tax levers count, too. The federal Historic Tax Credit can cover up to 20 percent of qualified rehab costs for certified historic structures, but it’s narrow—only older buildings, and the compliance demands are a headache. A bigger federal incentive, like the Commercial-to-Residential Conversion Tax Credit floated in several bills, could knock down the cost barrier a lot further. At the local level, property tax breaks and impact-fee waivers have shown real bite in places like Philadelphia and Seattle.

Addressing Affordability and Equity

A fair knock on conversions is that they’ll just spit out luxury units and do zip for the families who need help most. The evidence paints a more mixed picture. Market-rate conversions can still take heat off the broader housing market by adding supply and easing the scramble for older, cheaper units. A 2022 study in the Journal of Urban Economics found that new market-rate construction in the lower half of the income distribution nudges nearby rents down 5 to 7 percent over six years through filtering—higher-income households move into the new spots, leaving their old, less expensive places behind.

To lock in direct affordability, cities can peg incentives to inclusionary rules. San Francisco’s 2023 office-to-residential law requires that 20 percent of units in converted buildings be affordable to households at or below 80 percent of area median income. Montreal’s subsidy program shoulders 20 to 35 percent of conversion costs but demands affordable units in return. Policies like that turn conversions into a tool for economic mixing, not just pushing people out.

Environmental and Community Benefits

Reusing what’s already standing is a lighter lift for the climate than knocking it down and starting over. The embodied carbon locked in a building’s frame—the emissions from making and hauling the steel, the concrete—stays put, and you skip the fresh carbon debt of new materials. Work by the National Trust for Historic Preservation reckons that reusing a typical commercial building can save 50 to 75 percent of embodied carbon versus building new, even after you factor in energy-efficiency upgrades. With building operations making up nearly 30 percent of U.S. greenhouse gas emissions, conversions line up with climate goals in a pretty direct way.

At the block level, conversions can pull downtowns back from the brink. Empty office canyons bleed foot traffic, clobber small businesses, and thin out transit ridership. Put residents in those same buildings and suddenly you’ve got 24/7 activity—people grabbing coffee, walking dogs, keeping eyes on the street. Post-pandemic, cities from San Francisco to Washington, D.C. are sketching central business districts as actual mixed-use neighborhoods rather than single-use office parks. Conversions make that sketch real.

Challenges and Realistic Limits

Conversions are no magic wand. Plenty of modern office blocks have floor plates so deep you’d need a miner’s lamp to reach the interior. Structural grids laid out for open-plan cubicle farms don’t always cooperate with apartment layouts. Elevator banks, stair cores, plumbing chases—moving those is anything but cheap. The Urban Land Institute figures maybe 10 to 20 percent of office stock in most cities is a strong fit without a fat subsidy.

Money remains sticky. Construction costs are still high, interest rates have made debt pricier, and appraisals for conversion projects get fuzzy because there just aren’t many comparable sales. Lenders often want bigger equity checks or pre-leasing commitments, which are tough to lock down for residential projects that’ll take two or three years to deliver. Public-private tie-ups and patient money from institutional investors with long time horizons might be the bridge here.

There’s also a legitimate worry about shoving out existing commercial tenants, especially the small shops and services that anchor a neighborhood. A smart approach includes relocation help and zoning that holds onto ground-floor commercial spaces in mixed-use conversions, so new residents still have a grocery store, a daycare, a dry cleaner within walking distance.

A Pragmatic Path Forward

Scaling conversions takes a coordinated shove from every level of government, plus some private-sector invention. On the federal side, a refundable tax credit for conversion projects that hit affordability and sustainability benchmarks—something modeled on the Low-Income Housing Tax Credit structure—could move the needle. States can override local zoning that blocks residential uses in commercial strips, the way California did with its 2022 adaptive reuse bill. Cities can speed up permits, drop parking minimums, and hand out density bonuses for projects that set aside affordable units.

The building industry, for its part, is cooking up prefabricated modular systems that slide into existing shells, trimming both construction time and cost. Architects are carving light wells and atrium cuts to pull daylight into those stubbornly deep floor plates. Those kinds of technical jumps widen the pool of convertible buildings past the pre-war classics.

The moment calls for a practical streak. The office market isn’t snapping back to 2019 norms; hybrid work is lodged in place. The housing crisis isn’t going to evaporate; we need millions of new units. Conversions sit right at that intersection, turning a drag into a gain. The early evidence from cities that have gone first is solid, but the size of the problem asks for a much bigger commitment. Policymakers who want results they can count—more homes, lower emissions, downtowns that feel alive again—ought to put adaptive reuse near the center of their housing playbook.

Frequently Asked Questions

What types of commercial buildings are easiest to convert to housing?

Older office buildings from before World War II are usually the best candidates: smaller floor plates, higher ceilings, windows that actually open, and plumbing risers already in place. Buildings with rectangular or L-shaped footprints let natural light reach most units. Hotels and warehouses can also work well. The modern glass-and-steel tower with a deep, square floor plate? That’s a much harder puzzle without serious structural surgery.

How long does a commercial-to-residential conversion take?

A typical project runs 18 to 36 months from the day you buy the building until people move in, depending on condition and retrofit complexity. Design and permitting usually chew up six to 12 months; construction grabs another 12 to 24. Places with streamlined approval paths—think Los Angeles or Calgary—can trim several months by cutting back on discretionary reviews.

Can conversions really produce affordable housing, or will they all be luxury units?

Left purely to the market, most conversions will land at market-rate because construction costs are steep and developers have to make their numbers work. But cities can require or sweeten affordability through inclusionary zoning, tax breaks, and direct cash subsidies. When public benefits are part of the deal, conversions can produce mixed-income housing. Even market-rate projects help affordability indirectly by adding to the overall supply and loosening the squeeze on the existing stock.

What are the biggest obstacles to more widespread conversions?

The big ones: zoning that bans residential in commercial districts, building codes that older structures struggle to meet, high construction and financing costs, and physical headaches like deep floor plates and skimpy plumbing infrastructure. Knocking those down takes coordinated policy changes at the federal, state, and local levels, plus some fresh thinking from the building industry on construction methods.