Emirati investment formed the lion's share of this figure, totaling AED12.5 billion, representing almost double the AED6.5 billion figure invested by all other GCC nationals combined.
"UAE investors made 2,513 transactions worth a total of AED12.568 billion in the first six months of the current year and in doing so, were placed at the GCC top spot well above all other investors in Dubai's real estate market," said Sultan Butti Bin Mejren, director general of DLD.
"The figure indicates the great demand from UAE nationals in investing in property in Dubai and sends out a reassuring message to all other categories of investor. In addition to strengthening confidence in the market, it provides solid foundations that will ensure its sustainability and long-term stability," he added.
DLD's report revealed that citizens of Saudi Arabia were ranked in second place on the list of GCC real estate investment after making 1,121 transactions worth AED3.3billion in the first half of 2014.
Qataris were ranked third with 113 transactions worth AED1.463 billion, followed by Kuwaitis (263 transactions worth AED 839 million), Omanis (AED 482 million) and Bahrainis (AED247 million).
Annual growth in prime property prices in Dubai almost halved in the second quarter of 2014 compared to the previous quarter, Knight Frank said last month.
Prime prices rose by 6.3 percent in the year to June, down from 11.7 percent in the last quarter, it's Prime Global Cities Index for Q2 revealed.
Dubai was ranked the 13th best performing real estate market tracked by the property consultancy, a sharp fall from previous quarters when the emirate has featured in the top two positions.