RIYADH- Jabal Omar Development Co., one of Saudi Arabia's largest listed property developers, expects to finalise its merger deal with Umm Al Qura Development and Construction in 2018, a senior company executive told Reuters.

The deal, announced in November, is key to strengthening Jabal Omar's presence in the real estate market of the Muslim holy city of Mecca beyond its flagship project within walking distance of the Grand Mosque to help tap growth in tourism.

"A key objective of this deal is basically to add value to Mecca real estate market," Faisal Shaker, chief investment and development officer, told Reuters in an interview.

"The size of King Abdulaziz road (which Umm Al Qura Co. is developing) is over 6 million square meters (65 million square feet) of built-up area. We aim to close the merger with Umm Al Qura in 2018," he added.

He said the company was currently working on a valuation for the deal with adviser Goldman Sachs.

In November, local media estimated the merger would create a real estate business with 50 billion riyals ($13.3 billion) of investments.

Pilgrimage to Islam's holiest sites in Mecca and Medina is the backbone of a plan to expand tourism under Crown Prince Mohammed bin Salman's economic reforms to diversify the economy away from oil.

The annual haj pilgrimage and the lesser year-round pilgrimage known as Umra generate $12 billion in revenues from lodging, transport, gifts, food and fees, according to BMI Research.

The government's Vision 2030 reform plan aims to accommodate 30 million Umra visitors per year, up from 8 million now.

To finance its working capital, Jabal Omar plans to issue Islamic bonds, or sukuk, in the first half of 2018. Gulf International Bank (GIB) and HSBC are the advisers, Shaker said, declining to give further details.

In November, sources told Reuters that Jabal Omar was planning a sukuk sale that could top 4 billion riyals.

The company will also launch a real estate fund to finance new phases of its mega project that includes commercial malls, residential properties and hotels over a total built-up area of 1.66 million square meters.

"We are working on a number of investment products such as the REITs (real estate investment trusts) and funds with various structures, and we are looking to put some assets into income producing funds," Shaker said.

Jabal Omar will have around 5,000 new hotel rooms in its inventory in 2019. It will start off-plan sales of residential properties once it gets the licence from the ministry of housing, probably in 2018, he said.

($1 = 3.75 Saudi riyals)

(Reporting by Marwa Rashad Editing by Sami Aboudi and Mark Potter) ((marwa.rashad@thomsonreuters.com; +966114632603 ; Reuters Messaging: marwa.rashad.thomsonreuters.com@reuters.net))