24/7 Emergency Repair Service
Del-Mar Door Service has AAADM certified technicians that are available around the clock to provide 24-hour emergency service to ensure the safety and security of your business.
Find Out MoreLocal Commercial Door Services for Dover
As Delaware’s capital, Dover is home to state government buildings, schools, retail centers, and healthcare facilities that depend on reliable automatic door access. Whether you manage a facility near Legislative Hall, Dover Mall, or Bayhealth Hospital, we provide the responsive service you need.
Serving Government, Retail, and Healthcare Sectors
We help keep doors working at public offices, college campuses, and shopping centers across Dover. Our technicians understand the unique access and safety demands of each setting.
Door Maintenance You Can Count On
Downtime can impact everything from patient access to store security. We offer maintenance plans that keep your doors in top shape—reducing emergencies and protecting your budget.
24/7 Repairs Across the Dover Area
When doors stop working, our technicians are ready to respond fast, day or night. With stocked vans and local dispatch, we fix problems on the spot to get your facility running again.
Why Dover Relies on Del-Mar Door Service
With over 60 years in the business, we provide dependable repairs backed by industry-trained technicians and fast response. We prioritize first-time fixes to save you time and money.
Preventative Maintenance
With our industry-leading preventative maintenance agreements we prevent break-downs and save on costs over the life of your door.
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Best Local Presence
Our extensive local presence includes 120 certified technicians across 18 locations, each equipped with a fully stocked van, ensuring fast and reliable service.
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Speed of Dispatch
We will have a technician work on your door within 24 hours. In an emergency we will help you after hours.
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Most Industry Experience
Our technicians have the most experience based on 60 years of company history and a leading technician training program.
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Full-Service Commercial Door Solutions in Dover
We repair, maintain, and install all commercial door types—automatic doors, drive-thru windows, fire doors, and more—tailored to the needs of Dover’s businesses and public institutions.
Commercial Door Installation
Our certified employees are available to serve your needs before, during and after install. Our 3-step process ensures quality product but also proper and safe installation.
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Automatic Door Maintenance
Del-Mar Door Service not only sells and installs top quality doors, windows and accessories, we also provide support and maintenance on all your automatic doors.
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Commercial Door Service
Del-Mar Door Service not only sells and installs top quality doors, windows and accessories, we also provide support and maintenance on all your automatic doors.
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Commercial Door Repair
Choosing the right partner for your commercial door repair services is just as important as choosing the right automatic door manufacturer. We can help!
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Won-Door Maintenance & Inspections
Keep your commercial doors working efficiently with our automatic door maintenance agreements. Our door maintenance contract will help avoid costly repairs.
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Door Maintenance Contracts
Keep your commercial doors working efficiently with our automatic door maintenance agreements. Our door maintenance contracts will help avoid costly repairs.
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Fire Door Inspections
We make sure your Fire Doors are keeping your employees and customers safe. Fire door inspections are the first step toward fire door compliance. Find out more!
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Manual Door Service & Installation
We help our clients reduce down-time and cost with fast service by the most experienced technicians. As an authorized distributor of various brands, we work with various types of manual doors.
Find Out MoreWhat Dover Clients Say
From large state buildings to local shops, our Dover clients appreciate our professionalism, speed, and commitment to getting it done right the first time.
Your guys do a great job when working at my facility and they go above and beyond to fix many issues here great attitude and service excellence great to work with your team is number 1 in my book look forward to working with the company for years to come.
Customer Review
Frequently Asked Questions in Dover
Answers to common questions from Dover facility managers and property owners.
Yes, we’re available day or night for emergency commercial door repairs anywhere in Dover, DE.
We repair all types of commercial doors—sliding, swinging, automatic, manual, fire-rated, and more.
Absolutely. We offer customized maintenance plans for long-term reliability and compliance.
Yes. We maintain and repair all types of commercial doors and automatic door systems, including sliding doors, swing doors, automatic swinging doors, and icu doors for specialized retail. Our technicians can replace a damaged door panel, upgrade your door operator, or install a new opener to keep your buildings running efficiently.