The Bluecoat is built in brick with painted stone dressings and a slate roof. H-shaped in plan, originally the rear of the school resembled the front but in 1821 it was remodeled giving it a convex-shaped elevation. The front encloses three sides of a quadrangle and is separated from School Lane by a low wall with railings and gatepiers. The central block of five bays has two storeys with round-arched windows; the central three bays project forwards under a pediment containing a clock which has only an hour hand. On the roof is an octagonal cupola with round-arched openings, attached Ionic columns and a copper cap with a finial. The wings have three storeys; they are eleven bays long and one bay wide. On the ground and first floor the windows are square-headed while those on the top floor are oval. The end elevations have arched windows which match the central block. All the large windows have keystones with cherubs' heads. The main door in the centre of the central block has Ionic columns with a broken pediment containing a cartouche of the arms of Liverpool. Each wing has three square-headed doors approached by steps. The wall, railings and gate piers on School Lane are also listed at Grade I. The 2005-2008 renovation at a cost of £14 million also included a new 2250 square metre extension, the architects being BIQ Architecten. The architects found that there were 32 different floor levels in the old building. They carried out much structural change to produce exhibition areas with better accessibility. The new extension is built mainly in brick to link with the old building, although it has a copper roof and more modern materials internally. The new wing houses a flexible performance area and four art galleries. In addition, the complex provides studios for artists and craftspeople, a restaurant and a café and a number of retail outlets
