Are you translating this document for use in Europe/Britain/the USA? There may be different terminologies for different countries.
Here are some sites that may give you some help -
Armchair Property Investor - property-investment-terms-of-use - Armchair Property Investor - Investment property, UK property investment, Overseas property investment. - Uk Property
Spanish mortgages - a glossary of terms
Real Property Investment Law in Russia Real Property Investment Law in Bulgaria
If you want further help on specific problems with your translation, do post them here and we will do what we can to help.