THE Jones Lang Wootton agency has let 40,000 square feet of office space in Fitzwilton House, at Wilton Place, Dublin 2, following the refurbishment of the building at a cost of £3.5 million. Eight of the 12 floors in the block became vacant last year when accountants Coopers & Lybrand moved to George's Quay. One of the older tenants, solicitors William Fry, has taken an additional 5,000 square feet and an institution has agreed to pay £16.50 for a suite of 3,350 square feet. According to Tony O'Loughlin of Jones Lang Wootton, the rents achieved, £15.50 to £16.50, have set a new record for refurbished office space. Tenants include Visio International, Global Knowledge, Network, Rob son Rhodes and the Revenue Appeals Commissioners.