Cornerstone General Contracting

A+" Rating by the Better Business Bureau. Mastic Preferred / Elite Contractor for Siding & Windows. Established in 1996. Our company holds very high standards for quality work at competitive prices. Customer satisfaction is priority, earning the A+ rating from the BBB. All work is guaranteed for one year. Professional references. Quality workmanship is guaranteed. Experience with Insurance claims working personally with agents and adjusters to negotiate on the customers behalf the necessary settlement to complete the project..

Our company is based on the belief that our customers' needs are of the utmost importance. Our entire team is committed to meeting those needs. As a result, a high percentage of our business is from repeat customers and referrals.  We would welcome the opportunity to earn your trust and deliver you the best service in the industry.