A little-known provision in Missouri's new law could put money back in your pocket if you're converting office space to residential—but only if you act within a specific window.
Most construction and trades owners in Missouri haven't heard about a tax credit buried in HB3231 that could significantly reduce the cost of converting aging office buildings into residential housing. The provision exists, it's substantial, and it has a hard deadline most people don't know about.
Under §620.6024, subsection 3(1) of HB3231 (the "Missouri Innovation, Public Safety, and Accountability Act"), a taxpayer who converts an office building that's at least 25 years old into predominantly residential use can claim a non-refundable state tax credit. "Predominantly residential" means more than 50% of the building's gross square footage must be converted to residential use.
The credit is worth up to 25% of your qualified conversion expenditures. If the new residential space is on upper floors in a qualifying Main Street district, the credit jumps to 30%. These credits are transferable and assignable, meaning you can sell or assign them to another party if you don't need the full benefit yourself.
The state has allocated up to $50 million annually for this program, so availability will depend on the volume of applications and approvals.
The conversion must occur within a certified Missouri Innovation Zone or a qualifying Main Street district. If you're considering a project, verify that your target building and location meet these geographic requirements before investing time in planning.
This is the part most people miss: the credit applies to tax years beginning on or after January 1, 2027. That's when the program becomes active. However, the program sunsets 10 years after August 28, 2026—meaning it expires around August 28, 2036.
In practical terms, you have roughly a nine-year window (2027–2036) to complete your conversion and claim the credit. If you're thinking about a project like this, that timeline should factor into your business planning now, even though the credit doesn't kick in until 2027.
This credit is most relevant to general contractors, construction managers, and trades firms involved in large renovation and conversion projects. It's also worth knowing if you're advising clients on feasibility or cost structure for office-to-residential conversions. Developers and property owners should absolutely be aware of it when evaluating project economics.
If you're considering or quoting a conversion project, confirm that the building qualifies (25+ years old), that the location is in an eligible zone or Main Street district, and that the project timeline aligns with the 2027–2036 window. The credit only applies to qualified conversion expenditures, so documentation and compliance with the statute will matter.
For detailed guidance on what counts as a qualified expenditure or how to apply, contact the Missouri Department of Economic Development or consult with a tax professional familiar with the statute.
Source: HB3231, §620.6024, subsection 3(1), pages 82–83.