South Portland Windows

South Portland Windows & New Construction

American Building Group has over 33 years of experience as a full-service construction company in South Portland, Maine. We can install any type of new window for your home, and handle any new construction! If you are considering a home addition, remodeling project, or are building a house in South Portland, you need ABG. We provide affordable window construction and installation services to homeowners directly, as well as for general contractors needing reliable and affordable windows.

Storm Windows in South Portland, Maine

We know how important it is to protect your home from storm damage, cold Maine winters, and other weather conditions. We can install new window screens, storm windows, shutters, and other protection so your windows are safe. We’ll prevent window damage by making sure you have strong, durable weatherproof windows. We can fix window drafts, leaks, and more.

South Portland Window Remodeling

We can make your window openings larger, smaller, or even different shapes. Want a circular window? No problem! Whether you need a square, circle, or rectangular window, ABG makes window remodeling affordable in South Portland, Maine. We can fix or install new window trim, shutters, double-pane glass, and anything else you need so your home has the best windows.

Helping Businesses, Homeowners, and Property Managers in Southern Maine.

Best Types of Windows

Paradigm vinyl windows are absolutely stunning, and ABG makes sure your new window installation is affordable.

Anderson wood & composite windows are beautiful in design and style, so of course we have experience with composite window installation in South Portland.

Marvin wood, metal, and fiberglass windows great for storm protection because they are strong and sturdy.

We build custom windows and install any brand too, so give us a call!

South Portland Window Framing

We can install any type of window frame or build completely custom window frames in South Portland. If you need affordable window framing, give ABG a call! Learn more about window framing options from the official window & energy resource.

Sealed Tight

We use odorless and colorless gases to test your windows and make sure they are 100% sealed. We are diligent in our work and always make sure to never take shortcuts when it comes to window construction and installation. We’ll make sure your existing or new windows are completely sealed to prevent drafts, leaks, and to stop bugs from entering your home.

Built With Integrity.

We are the American Building Group- Your local construction company here in South Portland. At ABG we specialize in all new installations for any home or business. From window and door installations, to framework, siding, and more we are your full-service company. ABG always follows strict safety guidelines and business practices. We provide our customers with honest work and a dependable service. For any of your new projects give us a call.

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Featured Project

Commercial Apartments

Scarborough
December 2025

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Project Portfolio

Check out the latest projects that we have been working on:

Learn why your neighbors love American Building Group.

American Building Group has proudly established ourselves in the Southern Maine construction industry as an honest and efficient company.

Proud Years in Business

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Maine Communities Served

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Projects Completed in Maine

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Building Material Suppliers

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"ABG transformed our home's entrance into something truly spectacular! We wanted stone steps and an elaborate overhang to create that grand entrance feel, and they delivered beyond our expectations. Their project manager walked us through every detail, and the 33 years of experience really showed. The craftsmanship is impeccable, and they completed everything on time. Our neighbors keep stopping by to compliment the work!"

"We hired ABG to build a deck and install sliding glass doors connecting to our new patio. The fact that they handled everything - framing, doors, the deck construction - made the process so much easier than coordinating multiple contractors. They really understand Maine weather and terrain, and our deck has held up beautifully through two harsh winters now. The security features on our new doors, including deadbolts and steel reinforcements, give us great peace of mind while still looking gorgeous."

"As a property manager, I've worked with many contractors, but ABG stands out. They handled a complete siding job on one of our commercial properties - beautiful custom wood siding that looks amazing. What impressed me most was their honest business practices and clear communication throughout. All contracting agreements were discussed upfront, and there were zero surprises. They're OSHA compliant with supervisors always on site. Highly recommend!"

"ABG installed new windows and custom trim throughout our historic home. Their experienced foremen knew exactly how to work with our unique framing challenges, and the attention to detail was remarkable. They were incredibly professional - legal working hours, supervisors always present, and excellent communication. The team worked closely with us to achieve the exact look we envisioned. After 33 years in business, they've clearly mastered their craft. Worth every penny!"

"From our initial consultation to project completion, ABG was outstanding. We had them install a beautiful new door with inside-only security features and add vinyl siding to our home's exterior. They helped us choose materials that fit our budget and style perfectly. The team's knowledge of Maine door installations and their commitment to safety protocols was evident throughout. They truly kept our family's safety as their top priority while delivering a beautiful finished product. Couldn't be happier with our home improvement project!"

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