Legislation that creates or modifies a range of tax incentives for business development also would make some necessary changes in the workforce housing and brownfield/grayfield tax credit programs that are used by developers. House File 656 would resolve some potential administrative hazards. Under the workforce housing program, developers cannot budget more than $200,000 per unit in their calculations for the cost of rehabbing or developing new housing. As the law stands, the Iowa Department of Revenue could reject that tax credit if final costs come in at $201,000 per unit. The bill would allow developers some leeway, about 10 percent, in their per-unit costs. The tax credits are awarded after projects are completed and final costs submitted for approval. However, a small penalty also would be assessed for exceeding the $200,000 threshold. The bill also would allow the Iowa Economic Development Authority to give developers the benefit of the doubt for delays in completing projects that qualify for brownfield/grayfield tax credits. As the law stands, developers have 30 months to complete their projects, but can seek a one-time, 12-month extension. The legislation would give IEDA the discretion of determining how much more time to grant a project in the event a wooly mammoth, for example, is unearthed during construction. The bill also provides developers of the former Younkers building more time to complete their project as the result of delays associated with a fire that destroyed the east section of the building.