One more Y Combinator startup from the March 2012 class has bagged a seed round of funding. PlanGrid, which has created a groundbreaking app for the construction industry, has raised $1.1 million from a notable list of backers. They include Suleman Ali, founder and CEO of TinyCo; Sam Altman, founder of Loopt; Paul Buchheit, the creator of Gmail; Matt Cutts, the head of Google’s Webspam team, Ray Levitt, Director of Stanford University’s Construction Engineering department; building-sector-focused Navitas Capital; as well as 500 Startups and Y Combinator itself.

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