The high strength and light weight of fibre reinforced polymer (FRP) and the fact that they are now available in the form of very thin sheets, provide an attractive and economical solution for strengthening existing concrete bridges and structures to increase their ductility, flexure and shear capacity in response to the increasing demand to use heavier truck loads. This paper reviews some of the Canadian projects which have been completed using these materials. The paper presents a new technology for remote monitoring of bridges to minimize the need for frequent site inspections, as well as new material being developed for the rehabilitation of wood bridges. Monitoring is based on using a new generation of fibre optic sensors which have already been implemented in the construction of new bridges in Canada, as well as in the strengthening of existing ones. Repairs and rehabilitation engineering being a specialized field calls for skills and abilities far beyond the construction engineering and has to be a balance amid advanced technology and trends, management, feasibility and economy. Experimental studies from past few earthquakes states, Most of the long-standing buildings that collapsed were found deficient to meet-up the requirements of present day seismic design standards. Frequent earthquakes continue shaking the land every now and then. Due to faulty construction practices, disinclination to seismic design compliance and the construction that has taken place in the past without seismic standards or awareness calls for the Rehabilitation of the existing structures showing signs of descent. This has to be done to save the lives and the economy. The purpose of this paper is to present the process of rehabilitation, retrofitting characteristics and technical aspects of the major intervention methods.