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Minimum cost - $20 per square foot. Maximum cost - $100 per square foot. The cost of terrazzo flooring is directly related to the materials out of which the floor itself is made. Since terrazzo flooring is made out of little chips and pieces of other materials, some terrazzo flooring costs more than others.
1. Conservatory Concrete base. Â£94.00 per sq metre (assumes max build up from ground level to base level of 200 mm) Minimum charge Â£650 (Based on a concrete base - 150 mm thick, brick faced and including damp proof membrane).ased on 3660mm x 3350mm Victorian Style Conservatory. (All calculations are based on gross external areas-no deductions for doors or angles). Base cost = 3.66 x 3.35 = 12.26 sq metres-cost 12.26 x Â£94 = Â£1152.44. 600 mm dwarf wall = 3.66 + 3.35 + 3.35 (10.36 metres) x 0.6 m = 6.216 sq metres.