Establishes the build up New York pilot program and the mass timber for affordable housing program to encourage the use of mass timber in affordable housing retrofits and additions

Establishes the build up New York pilot program to provide grants to eligible municipalities that construct new accessory dwelling unit housing projects built on top of existing buildings that utilize mass timber and serve certain households; establishes the mass timber for affordable housing program to provide tax credits for eligible taxpayers who use mass timber in certain new construction or major retrofits of existing buildings that primarily serve households up to one hundred fifty percent of the area median income; establishes tax credits for mass timber production.