Nine [[Local government in Wales|local authorities in Wales]] made proposals including the [[Swansea Guildhall|Guildhall]] proposed by [[City and County of Swansea council|Swansea Council]], Cardiff City Hall by [[Cardiff Council]], [[Margam Castle]] by [[Neath Port Talbot County Borough Council|Neath Port Talbot Council]], [[Cyfarthfa Castle]] by [[Merthyr Tydfil County Borough Council|Merthyr Tydfil Council]]; proposals also came from [[Wrexham County Borough Council|Wrexham Council]], [[Flintshire County Council]] who proposed two sites at [[Ewloe]] and [[Mold, Flintshire|Mold]], [[Rhondda Cynon Taf County Borough Council|Rhondda Cynon Taf Council]], [[Powys County Council]] and five sites from [[Bridgend County Borough Council|Bridgend Council]] The Grosvenor Waterside proposal, known as Capital Waterside, included the [[Pierhead Building]], [[Tŷ Hywel|Crickhowell House]] and Site 1E, which would become the site of the new debating chamber. All the proposals were reviewed by the Welsh Office, who rejected sites due to poor location, accommodation or cost. A shortlist of ten sites were further reviewed. These were: Capital Waterside (now known as Cardiff Waterside); Cardiff City Hall; a site next to [[County Hall, Cardiff|County Hall]]; Bute Square (now known as [[Callaghan Square]]); Prospect Place; Cardiff Gate Business Park; Kingsway and the [[Coal Exchange]] all in Cardiff, with the HTV site at [[Culverhouse Cross]], and the Guildhall in [[Swansea]]. Davies announced on 13 March 1998 that the new National Assembly building would be in Cardiff. He said that the Cardiff proposals were "too compelling to resist", because "in making this decision, I am mindful that Wales has invested 40 years in promoting Cardiff as our capital city." The National Assembly building would be either in Bute Square or Capital Waterside. The Welsh Office decided that the Capital Waterside proposal carried less risk and would cost less than the Bute Square proposal. Capital Waterside would cost £43.9M, while Bute Square would cost £52.5M. On 28 April 1998, Davies announced that the site of the National Assembly building would be Capital Waterside.