The continuous existence of man is dependent on the free goods and services (e.g. water, air purification, fisheries, timber production and nutrient cycling) provided by his natural environment. Due to the public nature of these goods and services, they are not traded in the open markets hence, they are regarded as not having market prices. As a result, the current economic system fails to capture their losses and this may continue for long if care is not taken. Unless economic decisions (and the associated implications of development options) are made based on valuing the invisible aspects of ecosystems, unfriendly environmental decisions may continue to be taken that will culminate into economic, social and environmental cost which may be unmanageable. It is therefore expedient that a Green Economy with consideration for the immense value of biodiversity and ecosystems be incorporated by both corporate and governmental agencies so as to ensure a sustainable development progression in an economy. In achieving sustainable green economy, the appropriate stakeholders should pay particular attention to the value of natural capital in any policy decision. Hence, this study examined the roles of Estate Surveyors and Valuers (ESVs) in a green economy. Exploratory approach was employed in carrying out the study. Literature review technique was adopted to examine the various aspects of the economy and the roles of ESVs that help in greening the economy. The study identify the roles of ESVs in greening an economy to include: ensuring the use of renewable energy instead of fossil fuel in their management properties, adoption of efficient technology that consumes less energy, advising on waste minimization and appropriate waste management approaches, giving consideration to ecosystem services while carrying out development valuation and finally promoting decent jobs that takes cognisance of employee’s welfare, job security and career prospects. The study therefore recommends that the time has come for Estate Surveyors and Valuers to be actively involved in greening Nigerian economy.

The practice of environmental valuation for compensation has raised serious concerns among estate surveyors and valuers (ESVs) practicing in Nigeria due to the challenges posed by the enabling laws and other factors. This study examined the methods adopted by ESVs in carrying out the valuation of land contaminated by oil spill in Rivers State. The study focused on ESVs practicing with registered firms in Rivers State. Primary data was obtained by administration of questionnaires on 120 ESVs out of which 80 questionnaires were retrieved and used for the analysis. Also, semi-structured interviews were conducted with estate surveyors and valuers identified to be experienced in the subject of study in order to obtain data on their practice and experience. The primary data was analysed using, percentages, relative importance index (RII) and principal component analysis as well as coding and narrating for the interviews. The findings indicated that the methods adopted for valuation are the income capitalization, predetermined compensation rate, sales comparison, market prices and depreciated replacement cost approach. The study therefore recommends that professional bodies should continuously train and develop ESVs in this aspect of valuation.