Developers might get an extra four years to complete projects that were in danger of losing a property tax break that some call essential to getting financing. As part of her executive budget released Wednesday, Gov. Kathy Hochul proposed extending the construction deadline for New York City projects grandfathered under the now-expired 421a program. Developers raced to qualify for the tax exemption by completing foundation elements by June 15, 2022, but still need to finish