UPDATE 1-D.R. Horton sees 2018 homes sales below Street estimates

(Adds estimate, shares)

Oct 9 (Reuters) - U.S. homebuilder D.R. Horton Inc on Tuesday forecast fiscal 2018 home sales and orders below Wall Street estimates, as mortgage rates tick up and higher construction costs are limiting supply of homes.

D.R. Horton said it would sell 51,857 homes in fiscal 2018, an increase of 13 percent from a year earlier, but still fell short of average analysts' estimate of 52,325 homes, according to Refinitiv data.

Orders, a key indicator of future revenue for homebuilders, are expected to rise 13 percent to 52,740 homes, the company said. Analysts had expected orders of 52,878 homes.

D.R. Horton's shares fell 1.8 percent to $39.90 in premarket trading. (Reporting by Arunima Banerjee in Bengaluru; Editing by Shailesh Kuber)