Upton is one step closer to modernizing its Town Hall. Wendall Kalsow, of McGinley, Kalsow & Associates, the project architects, told the Town Hall Building Committee Wednesday that the state Historical Commission has approved the proposed $5.5 million renovation of the building. The approval was necessary, as the hall has a preservation restriction on it. The next hurdle for the project is approval at the Annual Town Meeting in May. Funding for the project would come from several sources, including about $5.1 million from community preservation funds. The remainder of the money has already been set aside, according to Upton town officials. The town is already searching for office space for the 12 to 14 months the renovations are projected to take, if voters approve the project. A number of alternative sites, including the former Holy Angels Church across the street from Town Hall, are being considered.