WINTER-PROOF YOUR HOME: 50% Off Installation on
Windows • Siding • Roofing • Doors + Financing Up To 20 Years.
Serving 730+ Towns in MA, NH & ME – Check Your Town »
"*" indicates required fields
Coastal Windows & Exteriors is the window company in South Portland, ME that makes it easy to enjoy a comfortable home all year long! We’re proud to be the #1 woman-owned window company in New England. Every window we install meets Energy Star 7.0 standards. Our 0.1 CFM air infiltration rating leads the industry, and winter wind stays outside. Our crews are LEAD Certified and Installation Masters certified, which means careful hands in every room. Request your free consultation today!



Tight Energy Star 7.0 glass keeps heating dollars inside your home instead of drifting outdoors.
Pick frame finishes, grids and shapes that suit a Knightville bungalow or a Willard Beach cottage.
Vinyl frames never ask for scraping or paint, just an occasional rinse with the garden hose.
Our 0.1 CFM air infiltration rating stops the drafts that leak energy through tired windows.
Comprehensive warranty coverage stands behind your new windows for the long haul.
Book online or call, and our window company in South Portland, ME will schedule a free, no-obligation in-home visit. Coastal Windows & Exteriors has earned a 4.8-star Google rating from 1000+ online reviews. Our consultants have measured for 7,000+ installations completed since 2011 across 730+ towns in Massachusetts, New Hampshire and Maine.
Top Recommendation: A whole-home review, since window replacement returns 76% of its cost at resale.
Best for Budget: Ask for a phased plan that tackles the coldest rooms first.
Best for Busy Households: Gather your questions ahead of time so one visit covers everything.
Ready to see what your windows need? Book your free visit and get honest answers in a single afternoon. Our estimates stay clear, written and free of pressure.
Request a free window estimate from Coastal Windows & Exteriors.
Browse our complete window FAQ guide from Coastal Windows & Exteriors.
Explore the Coastal Windows & Exteriors window Exterior Remodeling Home Improvement Help Center.
Last Updated: September 2026
Sources:
Our window company in South Portland, ME bases each install schedule on your unit count and site access. Every Coastal Windows & Exteriors installer is Installation Masters certified and LEAD Certified. That training backs 7,000+ installations completed since 2011 in 730+ towns across Massachusetts, New Hampshire and Maine.
Top Recommendation: Double hung units, the most requested style at 35%, for easy cleaning and familiar operation.
Best for Budget: Tackle one floor per visit so each installation day stays manageable.
Best for Airtight Views: Casement units, favored by 30% of professionals for tight seals and clear sightlines.
Ready to put a date on the calendar? Your free consultation turns guesswork into a clear plan. Our LEAD Certified crews bring that same planning to every home they visit.
Request a free window estimate from Coastal Windows & Exteriors.
Browse our complete window FAQ guide from Coastal Windows & Exteriors.
Explore the Coastal Windows & Exteriors window Exterior Remodeling Home Improvement Help Center.
Last Updated: September 2026
Sources:
Coastal Windows & Exteriors serves South Portland and its Greater Portland neighbors along Casco Bay. Maybe you live near Willard Beach, up on Meetinghouse Hill, or close to the shops in Knightville. We’ll come to you either way. Your free consultation covers everything from a quick window repair in South Portland, ME to a full upgrade. The estimate is free too, with no pressure attached. Discover why so many neighbors choose us as their window company in South Portland, ME.
Serving Greater Portland, the Southern Maine Coast, Casco Bay communities and New England.
South Portland has a way of slowing you down. The foghorn out at Spring Point Ledge. Sailboats gliding past Bug Light at sunset. Salt air rolling off Willard Beach on a warm July evening. Every time our trucks cross the Casco Bay Bridge into Cumberland County, I feel lucky to do this work.
This city asks a lot of its homes. Salt spray, hard freezes and wind that never takes a day off. That’s why we built our window company in South Portland, ME around honest advice. New England homes deserve windows made for New England weather. Every window installation in South Portland, ME gets the care I’d want for my own house.
Thank you for trusting us with your view of the harbor!
— Stephanie Vanderbilt, Owner, Coastal Windows & Exteriors
Fog between panes means a failed seal, and our window company in South Portland, ME fixes it with replacement. Coastal Windows & Exteriors installs new units with an industry-best 0.1 CFM air infiltration rating. Our crews have 7,000+ installations completed since 2011 across 730+ towns in Massachusetts, New Hampshire and Maine.
Top Recommendation: Replace fogged units before winter, since a failed seal won’t restore itself.
Best for Budget: Swap the cloudiest windows now and schedule the rest for next season.
Best for a Quieter Home: Triple pane glass, which reduces outside noise by about 40 to 50%.
Ready to trade that cloudy haze for a clear harbor view? Book a free assessment, and we’ll check every seal in the house. A fogged unit is a quick diagnosis for our trained eyes.
Request a free window estimate from Coastal Windows & Exteriors.
Browse our complete window FAQ guide from Coastal Windows & Exteriors.
Explore the Coastal Windows & Exteriors window Exterior Remodeling Home Improvement Help Center.
Last Updated: September 2026
Sources:
Black frames usually cost more than white, and our window company in South Portland, ME prices both upfront. Coastal Windows & Exteriors is New England’s #1 woman-owned exterior remodeling company on the INC 5000. Our color samples travel to 730+ towns across Massachusetts, New Hampshire and Maine. That guidance draws on 7,000+ installations completed since 2011.
Top Recommendation: Black frames, chosen by 71% of professionals, for a crisp modern look against coastal shingles.
Best for Budget: White frames, a classic preferred by 54% of professionals, at standard pricing.
Best for Softer Contrast: Charcoal or anthracite gray, cited by 21% of professionals for a gentler modern tone.
Ready to test colors against your own siding? We’ll bring samples, and the afternoon light can help you decide. With 1000+ online reviews behind us, we know how to guide this choice.
Request a free window estimate from Coastal Windows & Exteriors.
Browse our complete window FAQ guide from Coastal Windows & Exteriors.
Explore the Coastal Windows & Exteriors window Exterior Remodeling Home Improvement Help Center.
Last Updated: September 2026
Sources:
Custom sizing, advanced glass and skilled labor drive pricing at any window company in South Portland, ME. Coastal Windows & Exteriors backs every project with Energy Star 7.0 glass and certified installers. Homeowners in 730+ towns across Massachusetts, New Hampshire and Maine have trusted our 7,000+ installations completed since 2011.
Top Recommendation: Invest in the full house at once, so every room shares the same efficiency and the 76% resale return.
Best for Budget: Replace the draftiest rooms first, then finish the house in a second phase.
Best for Long-Term Savings: Triple pane glass, which can save over $500 a year compared with single pane.
Ready to see a real number for your own home? A free in-home estimate replaces national averages with facts about your house. Our team holds a 4.8-star Google rating across 1000+ online reviews.
Request a free window estimate from Coastal Windows & Exteriors.
Browse our complete window FAQ guide from Coastal Windows & Exteriors.
Explore the Coastal Windows & Exteriors window Exterior Remodeling Home Improvement Help Center.
Last Updated: September 2026
Sources:
New windows add real resale value, and a trusted window company in South Portland, ME helps you capture it. Coastal Windows & Exteriors carries a 4.8-star Google rating across 1000+ online reviews. Our team serves 730+ towns across Massachusetts, New Hampshire and Maine, with 7,000+ installations completed since 2011.
Top Recommendation: Whole-home replacement, which returns an estimated 76% of project cost at resale.
Best for Budget: Replace the front-facing windows first, since that’s what buyers photograph and remember.
Best for Bright Interiors: Larger picture or wall-to-wall glass, a top trend for 54% of professionals.
Ready to add lasting value to your home? Schedule a free estimate and see where new windows make the biggest difference. It’s the easiest first step you’ll take for your home this year!
Request a free window estimate from Coastal Windows & Exteriors.
Browse our complete window FAQ guide from Coastal Windows & Exteriors.
Explore the Coastal Windows & Exteriors window Exterior Remodeling Home Improvement Help Center.
Last Updated: September 2026
Sources:
Our window company in South Portland, ME offers financing, so you can start now and pay over time. Coastal Windows & Exteriors is a LEAD Certified, woman-owned firm serving 730+ towns across Massachusetts, New Hampshire and Maine. Our team reviews payment options in plain language, backed by 7,000+ installations completed since 2011.
Top Recommendation: Long-term financing, which lets a full-house project fit inside a monthly budget you’re comfortable with.
Best for Budget: Start with the bedrooms and living room, then spread the remaining windows across a later phase.
Best for Energy Savings: Pair financing with triple pane glass, which can save over $500 a year.
Ready to stop waiting on the perfect moment? Talk through payment options during your free estimate visit. Our team has earned a 4.8-star Google rating by keeping those conversations honest.
Request a free window estimate from Coastal Windows & Exteriors.
Browse our complete window FAQ guide from Coastal Windows & Exteriors.
Explore the Coastal Windows & Exteriors window Exterior Remodeling Home Improvement Help Center.
Last Updated: September 2026
Sources:



A brighter, cozier home shouldn’t sit on your someday list. Flexible payment options make a new window installation in South Portland, ME easier to plan. Ask about 0% interest options, or explore financing up to 20 years for a monthly payment that feels comfortable. Book online today and save.
Fresh windows change how a room feels long before the first energy bill arrives. Sunlight looks warmer, colors pop, and the view outside finally gets its due. Plenty of homeowners exploring window replacement in South Portland, ME say the difference feels bigger than expected. Press play, then book your free consultation.
Here’s what the right windows bring to a coastal home:
Our window company in South Portland, ME brings all of this to every project. Schedule your free assessment and feel the change for yourself.
South Portland wears its maritime history with pride. Settlers farmed this stretch of the Fore River as early as 1630. The town broke away from Cape Elizabeth on March 15, 1895. It became a city just three years later. Today it sits a little over 100 miles northeast of Boston, right across the harbor from Portland’s skyline.
During World War II, local shipyards built more than 10% of the nation’s Liberty ships. The Liberty Ship Memorial at Bug Light Park honors that effort today. Nearby, Spring Point Ledge Light has guarded the harbor since 1897, beside historic Fort Preble. Kids splash at Willard Beach, and walkers trace the Greenbelt Walkway along the water. The Maine Mall, the state’s largest shopping center, anchors the busy west end.
Neighborhoods like Knightville, Ferry Village and Meetinghouse Hill each have their own personality. Capes, bungalows and tidy colonials line streets that catch every ocean breeze. Those breezes carry salt, and salt is tough on aging frames. A timely window repair in South Portland, ME helps, but eventually glass and frames give out. That’s when homeowners call window contractors in South Portland, ME who know coastal weather.
Here’s how your project unfolds, from first hello to final handshake:
Our crews follow these five steps on every job. Each window installation in South Portland, ME ends with a handshake and a clean home. Book your free consultation today.
Plan around an estimated national average of $21,922 for window replacement in South Portland, ME. Size, glass package, frame material, color, unit count, custom shapes and site access all shape your total. Since new windows return 76% of their cost at resale, a good share comes back later.
Save with our 50% Off Installation Exterior Remodeling Contractor offer, or read our Replacement Windows FAQ: Your Questions Answered.
This national honor celebrated a company built on straight talk and steady craftsmanship. We share it with every homeowner who trusted us.
Neighbors have voted us a favorite for multiple years running. Recognition from the people we serve feels like the best kind of praise.
Recognized for our Roofs for Heroes initiative, donating over $100,000 in labor with GAF for veterans.
Stephanie built this business on education and genuine care. That spirit shows up at every South Portland doorstep we visit.
Our crews follow strict lead-safe practices on older homes. Your family’s health stays front and center from start to finish.
Please check the box to confirm that you understand your appointment is not yet finalized. A Coastal Windows & Exteriors representative will contact you shortly to verify your details and schedule your appointment. To secure your appointment, please answer or return the call.
"*" indicates required fields
We use cookies to improve your experience and analyze site traffic. By continuing to browse, you agree to our use of cookies per our Privacy Policy
Manage your cookie preferences below:
Essential cookies enable basic functions and are necessary for the proper function of the website.
CloudFlare provides web performance and security solutions, enhancing site speed and protecting against threats.
Service URL: developers.cloudflare.com (opens in a new window)
These cookies are needed for adding comments on this website.
Google Tag Manager simplifies the management of marketing tags on your website without code changes.
Statistics cookies collect information anonymously. This information helps us understand how visitors use our website.
Clarity is a web analytics service that tracks and reports website traffic.
Service URL: clarity.microsoft.com (opens in a new window)
Marketing cookies are used to follow visitors to websites. The intention is to show ads that are relevant and engaging to the individual user.
Facebook Pixel is a web analytics service that tracks and reports website traffic.
Service URL: www.facebook.com (opens in a new window)
You can find more information in our Cookie Policies and Privacy Policy.