Overseas property investors have been warned that markets that they do not "fully understand" carry additional risks.
Liam Bailey, head of residential research at Knight Frank, said although there is an element of uncertainty with any property investment, buying homes in a market that is unfamiliar can be "doubly risky".
"At the end of the day you take that risk because you want a bigger return, but you've got to weigh that in your investment planning," Mr Bailey commented.
Investing in an emerging economy poses risks because investors cannot rely on the "safety net" that is there for investors purchasing in the UK or developed European markets, he added.
Meanwhile, Paul Collins, property editor for BuyAssociation, said that Bulgaria's accession to the European Union has given investors more "confidence", as its property laws begin to resemble those of the rest of Europe.
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