Construction Backlog

3 Months Ended

Mar. 31, 2017

9.	Construction Backlog

The following represents the backlog of signed engineering contracts in existence at March 31, 2017 and December 31, 2016:

	March 31, 2017			December 31, 2016
Balance – beginning of period	$	541,291		$	105,851
New contracts and change orders during the period		306,097			807,786
		847,388			913,637
Less: contract revenue earned during the period		(84,635	)		(372,346	)
		762,753			541,291
Contracts signed but not started		-			-
Balance – end of period	$	762,753		$	541,291

As of March 31, 2017, the Company has $116,754 in deferred revenue which represents unearned billings on SG Blocks sales which the Company anticipates to be recognized during the year ending December 31, 2017.

In addition, between April 1, 2017 and May 3, 2017, the Company entered into additional engineering and SG Blocks sale contracts with revenues of $2,544,266.