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Quality Garage Doors in Portsmouth & Dover, NH.

Garage Doors Made Easy

Seacoast Door Systems delivers expert garage door solutions with experience for many years.

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Garage Doors Designed in Dover for Every Space

Seacoast Door Systems – Modern brick home in Dover, NH, with sleek Iron Ore Standard+ Uni garage doors for a minimalist look

Residential Doors

Home Upgrades Made Easy

Our selection of stylish, durable garage doors makes it simple to enhance your home.

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Seacoast Door Systems – Bold red industrial building in Portsmouth, NH, featuring durable black G-5000 commercial garage doors with glass panels

Commercial Doors

Strong Doors for Every Industry

From warehouses to storefronts, we provide high-performance commercial garage doors.

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Seacoast Door Systems – Expert installers completing a secure and smooth garage door installation in a bright Rochester, NH, home

Garage Door Repair

Expert Maintenance & Service

Whether it’s an urgent fix or routine maintenance, our team has you covered.

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Why choose Seacoast Door Systems and Garaga?

Discover the benefits of choosing Seacoast Door Systems and Garaga, Portsmouth and Dover’s leading experts in garage door solutions.

Peace of Mind

From consultation to installation, we make getting a new garage door as easy as possible.

Proven Expertise

Proudly serving New Hampshire’s Seacoast since 1979, our team knows what works best for local homes and businesses.

Energy Efficiency

No matter the season, our insulated doors help regulate temperature and reduce energy costs.

Transparent Pricing

We provide clear and competitive pricing, ensuring you get the best value for your investment.

Quiet Operation

LiftMaster openers offer advanced technology for smooth, quiet operation and added security.

Endless Design Options

From bold modern looks to classic charm, our garage doors are designed to elevate any home.

Wood carriage garage door with rich texture and durable craftsmanship. Installed by North Country Door Systems in Plattsburgh

Inspired by Tradition

The Beauty of Wood Carriage Doors

Enhance your home’s curb appeal with expertly crafted wood carriage doors, blending heritage and modern craftsmanship.

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Expert Support

Expert Solutions for Every Garage Door Need

Need a repair or seasonal maintenance? Our technicians provide prompt, professional service you can count on.

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Reliable Garage Doors for Businesses in Portsmouth & Dover

A large blue roller fire door is showcased, leading into the interior of a warehouse environment, installed by Seacoast Door Systems

Rolling and Fire Doors

Strong and Fire-Rated Commercial Doors

Our rolling and fire doors meet the highest safety standards while providing durability and security.

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High-performance silver commercial garage doors with glass inserts, ensuring security and efficiency in Dover, installed by Seacoast Door Systems

Sectional Doors

Energy-Efficient Sectional Doors

Designed for performance, our sectional doors provide insulation, security, and lasting durability.

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Large black high-speed door at exit number 4 of an underground parking lot

High-Speed Doors

Speed Up Your Operations

Our high-speed doors enhance workflow while maintaining climate control and security.

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Heavy-duty industrial dock leveler with reinforced seals for secure, weather-resistant loading operations in Sanford, installed by Seacoast Door Systems

Dock Levelers and Seals

Smarter Loading Dock Solutions

Keep your loading docks secure, efficient, and safe with our advanced levelers and seals.

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Garage doors from the best names in the industry

Find the Right Brand for your Home or Business

Our selection features top brands known for innovation, security, and efficiency.

From residential to commercial doors, we help you choose the best brand for your space.

Verified Google Reviews – Dover Area

What Homeowners Say About Working With Seacoast

These reviews come directly from Google. Browse what your neighbors across the Seacoast region have shared, then take the next step with confidence.

Satisfaction rate

4.7 • 79 reviews

Jeffrey Smith

2026-08-02

A very professional and prompt business. The technicians doing the work know their stuff and communicating with Jess back at the shop was a pleasure.

Jimmy Dykes

2026-07-29

I've used Seacoast a couple of times over the 11 years I've lived in Hampton. They respond quickly, diagnose the problems quickly, and offer the simplest and least expensive solutions, but are also prepared to provide replacements, when it becomes the most logical solution. That was the case most recently.

Bhaviniben patel

2026-07-24

Connor is knowledgeable and great, he made sure we understood what we were getting and made the process as smooth as possible. I would recommend him to any of my friends and family!

Mandy McAlpine

2026-07-23

Seacoast Door Systems was extremely fast to respond. They came out the next day after I called for service. They did an amazing job of communicating, they were on time and very personable.

Morry El-Badry

2026-07-22

Reputable and fair-priced.

Cheryl Freeman

2026-07-20

The door closes much quieter after being realigned. Since it is a large door I assumed it was supposed to be loud, but what a surprise to have it much quieter.

Suzanne Baczewski

2026-07-09

I am so happy with the work these guys did. They were prompt, professional and got my doors installed in no time. Everyone I interacted with was kind and very helpful. I would recommend them to anyone looking for new garage doors.

Chelsea Hutchings

2026-07-08

Excellent customer service.

Richard Cecchetti

2026-07-06

Showed up when they said tuned up my doors quickly and they work great now.

Fred Ellis

2026-07-03

The customer service and quality of the product is excellent!

ASHOK SHAH

2026-07-03

Efficient, quick. Pricey. Does not send you a bill or paid bill.

Brenda Carmichael

2026-07-03

Excellent service. Very pleased with entire process

Michael Mcguinness

2026-06-29

MY INSTALLER WAS GREAT. PROFESSIONALISM, EXPERIENCE IS A PERFECT DESCRIPTION...

Linda Spoor

2026-06-23

Love the new door. We chose black with windows at the top of the door. it is very quiet. The installers were professional . We now have a new door and rail system. We were surprised how quickly they finished. We would recommend them to anyone who needs a new garage door.

Marc Oldenburg

2026-06-18

Young guys and motivated to get business and do a great job! Showed up on time for the estimate and issued the estimate the same day. Had a lot of samples and recommendations. The job was well done and techs were friendly and informative.

Forrest Knight

2026-06-18

I was recommended by my parents and I am very happy with their work. They came over and helped me get exactly what I needed for a price I could afford.

Eric Eby

2026-06-15

Stephanie M C

2026-06-12

Five stars! Chandler did an excellent job installing our new garage doors and Connor was fantastic throughout the entire process. Both were professional, friendly, and great to work with. The doors look amazing and everything went smoothly from start to finish. Would highly recommend!

Angela Schaaf

2026-06-10

Excellent service. We got a consult on the books quickly. Connor was very responsive while we figured out what we wanted for a door. Installation went smoothly and we had a little sensor issue shortly after (our fault) they can’t back the next day and it was fixed immediately. Highly recommend.

Audra Brown

2026-06-10

Cathy Nickerson

2026-06-05

I had a garage door malfunction, called and spoke to a live person. They got a tech out in just a few days and problem solved. Dave, the tech who came out was fabulous. He explained the problem and gave me instructions on how to maintain the door.

Justin Ritz

2026-06-02

Danny was great! Got my old door operating smoothly with spring replacements. He was efficient and cleaned up and buttoned everything up better than it was before.

Barry Knox

2026-05-14

The individual team members were courteous and professional, but the actual job site experience was less than desirous and/or optimal. Problem areas included weight of the door, having to retrofit a different spring package, troubles tapping the door lock, and problems with locking and unlocking the door….all because I didn’t need/want the overhead motor. At the end of the day, it took 6 different employees coming back multiple times over multiple days to install a new garage door that still doesn’t lock efficiently. Maybe one more visit should do it…I’m always an optimist.

Michelle Fregeau

2026-05-12

The doors look beautiful and are exactly what I was looking for to upgrade the original ones! The price was great, the team was very professional and they made the whole process easy. Highly recommend.

tracy willaman

2026-05-09

It was done so quickly and then explained to me thoroughly. There was NO mess after either!! Highly recommend.

Doug Pariseau

2025-11-30

Randy was great with purchase of new door. Made it seamless very quick. great price. Thanks Randy.

Nelson Pleau

2026-05-02

Our garage door controller stopped working. We called Seacoast and their response was excellent. We were very impressed with the two techs. They were professional and, knowledgeable and pleasant to work with. They identified the problems and fixed and serviced our two door system. We highly recommend considering Seacoast for your garage door install or maintenance.

Jay Durant

2026-04-25

Prompt service at a reasonable price to get my garage door working again

Anne Ruozzi

2026-04-24

Outstanding customer service and support. The sales person was very knowledgeable and polite and very quick to respond. Same thing with the installers. Highly recommend!

Sue Clark

2026-04-17

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