Successful building maintenance and renovation projects require experience as well as precise planning and execution.  A wide variety of factors must be taken into account and as a consequence such projects are often complicated and may require such elements as:  analysis, assessment of the type and level of maintenance involved, design of the proposed work, preparation of technical specifications and tender documents, cost estimates and assistance with choosing a contractor.  Such projects also require consulting services during construction, including construction management, supervision and appraisal.