The Office-to-Apartment Boom Is at a Record High
A few years ago, office-to-residential conversions were a niche strategy. Interesting in theory, complicated in practice, pursued by a small group of developers with an appetite for unconventional projects and a tolerance for regulatory headaches.
That era is gone.
The number of office-to-apartment conversions hit a record high at the start of 2026, with some 90,300 apartments under construction across the United States, a 28% jump year over year and a staggering 291% increase since 2022. This isn’t a niche play anymore. It’s a mainstream strategy reshaping downtown real estate markets from New York to Chicago to Los Angeles, and the pace shows no sign of slowing down.
But volume doesn’t equal success. The boom has also surfaced a harder truth: not every office building is a conversion candidate. Knowing the difference is where the real money is made.
Why the Boom Is Happening Now
The forces driving conversions aren’t complicated. They’re just converging all at once.
Office vacancy rates in many markets remain stubbornly elevated, particularly for older Class B and C buildings that can’t compete with newer premium inventory. At the same time, the U.S. housing shortage is acute — the country is short 3.8 million housing units, and that gap isn’t closing through new construction alone. Developers and policymakers looked at the two problems sitting side by side and arrived at an obvious conclusion.
Policy has followed. New York offers a tax exemption for office-to-residential conversions with income restrictions on at least 25% of newly created apartments. Boston provides a tax abatement of up to 75% for qualifying conversion projects. Chicago approved $260 million in tax increment financing for five downtown office-to-residential projects, with 30% of units designated as affordable. City governments are actively incentivizing deals that would otherwise struggle to pencil out financially.
Among all adaptive reuse projects in the U.S. this year, office conversions make up 47% of future units — up from 42% last year. The market has spoken.
What Makes a Building a Good Candidate
This is where most coverage of the conversion boom goes shallow. The headline numbers are compelling. The execution is hard. And the buildings that work versus the ones that don’t are separated by a specific set of physical and financial criteria.
Ideal conversion candidates are typically smaller buildings under 14,000 square feet per floor. In successful conversions, the median building was constructed around 1941, with approximately 13,000 square feet per floor. Older buildings with smaller, narrower floor plates allow natural light to reach the interior of each unit, which is non-negotiable for residential use. Buildings considered the “worst” offices — typically Class B — are often the best candidates for conversion. Smaller floor plates and high floor-to-ceiling heights lend themselves to residential use. Office HVAC ducts and electrical wiring that reduce floor height can be stripped back, leaving 10-foot ceilings that feel spacious to residents.
Location matters enormously too. Office buildings located in mixed-use and walkable locations with access to jobs, services, and amenities are better suited for conversion. Many suburban office buildings are functionally obsolete and have lower property values, but apartment rents in those areas may be too low to make conversions viable from an economic standpoint. Downtown markets, where rents are high enough to cover acquisition and conversion costs, are where most successful projects are concentrated.
And acquisition basis is everything. Construction costs typically range from $250,000 to $300,000 per unit, making conversions financially viable only if the building is acquired at a steep discount. The deals that work are the ones where a distressed or undervalued office asset is purchased well below replacement cost, giving the developer enough room to absorb the complexity of the conversion and still generate a return.
What Makes a Building a Money Pit
The warning signs are just as specific.
Modern office buildings — typically built after 1980 — tend to have larger floor plates that don’t allow sufficient natural light to reach interior spaces, making apartment conversions impractical. These buildings may need significant structural interventions to bring enough natural light into living space, require substantial plumbing changes to accommodate multiple apartment units per floor, and may lack windows that open. Deep floor plates that made sense for open-plan offices become a liability the moment you’re trying to create livable apartments with natural light on every unit.
Buildings with active tenants present another layer of complexity. Buildings that still have residual tenants may require the owner to buy them out in order to proceed — adding cost and time to an already complicated process. And converting an office building isn’t cheap under any circumstances. New apartment construction typically costs around $588 per square foot. Converting an existing office to apartments averages $685 per square foot — meaning conversions cost more to build than starting from scratch, which is a reality many developers underestimate going in.
Brandon Charnas notes that the deals that go sideways in this space almost always share one trait: someone fell in love with the concept before stress-testing the specific building. The strategy is sound. The execution is where discipline separates good deals from expensive lessons.
The Opportunity for Owners and Investors Right Now
Despite the complexity, the window for well-positioned conversion plays is genuinely attractive, particularly while policy incentives remain in place and office valuations remain depressed.
Developers who pursue projects in cities with both high office vacancy and strong rental demand — particularly where public incentives are available — are best positioned to benefit from the conversion pipeline. The math improves considerably when a city is actively subsidizing the deal through tax abatements, credits, or zoning flexibility.
Brandon Charnas and Current Real Estate Advisors work with owners and investors evaluating exactly these kinds of opportunities — understanding not just whether a conversion is theoretically possible, but whether the specific building, in the specific market, at the specific acquisition price, actually makes financial sense. The boom is real. The opportunity is real. But in a market moving this fast, the ability to evaluate a conversion candidate rigorously — and walk away from the ones that don’t work — is what separates the investors who profit from this cycle from the ones who get burned by it.
The office-to-apartment story isn’t slowing down. The question is whether you’re in the right building.