Multiple black garage doors on a beige building with yellow clearance signs, an asphalt driveway, and an overcast sky.

Security Door Inc

Security Door Inc: The Premier Union Perimeter Security Company Serving Northwest Indiana & Chicagoland.

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our story

At SDI, a proud union company, our team of skilled professionals is dedicated to delivering customized security solutions tailored to your specific needs. We offer a full range of services, including perimeter fencing, commercial-grade doors, and advanced access control and gate operator systems. From design to installation, we ensure that every system meets industry standards and regulatory codes for optimal performance and compliance. Additionally, our ongoing support includes routine maintenance and 24/7 emergency services to keep your systems running smoothly, even if we didn’t originally install them.

Closed security gate with chain link fencing and electric controls, over a cracked asphalt pavement, with trees in the background and utility poles.

Our Services

  • A tall industrial metal fence with mesh panels and metal poles, situated on a gravel surface under a blue sky with power lines in the background.

    Commercial Fencing & Gates

    We specialize in the expert installation of high-quality commercial fencing tailored to meet your business's security, privacy, and aesthetic needs. From warehouses and industrial sites to office complexes and retail properties, we protect what matters most.

  • Closed industrial metal roll-up garage door on a brick building with a security camera and a sign nearby, under a partly cloudy sky.

    Overhead Doors

    We provide professional installation of commercial overhead doors designed for performance, security, and durability. From sectional and rolling steel doors to high-speed and insulated models, our expert team ensures every installation meets your operational needs and safety standards.

  • Photo of electrical equipment including a gray metal box, a black security box, and several cables mounted on a metal frame outside on gravel ground.

    Access control

    We provide cutting-edge commercial access control systems to enhance security and streamline operations. From keyless entry and biometric scanning to card access and remote management, our solutions are designed to safeguard your property and regulate access with ease.

  • Electrical cables and conduit connected to a metal box outside, with a metal fence and gravel ground in the background.

    Electrical

    We specialize in commercial electrical and grounding installations that ensure safety, reliability, and code compliance. Our skilled electricians handle everything from power distribution and lighting systems to critical grounding for equipment protection and system stability.

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Northwest indiana’s most trusted commercial security specialist

TRUSTED BY NORTHWEST INDIANA’S BIGGEST CORPORATIONS

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Our partners

  • Local 395 Ironworkers Logo.
  • Local 63 Ironworkers Logo.
  • American Fence Association Logo.
  • OSHA logo.
  • Avetta Member Logo.
  • International Door Association Preferred Provider Logo.
  • IS Networld Logo.
  • Logo for NWIBRT, Northwest Indiana Business RoundTable.
  • Local 697 IBEW Electricians Logo.
  • Local 531 Electricians Logo.