10 Best Window Replacement Companies in South Portland, ME

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Last Updated: February 25, 2025

Whether you're looking to upgrade your home or are simply in need of a change, upgrading your windows is a great plan. Your windows play an important role in your home's value and its energy efficiency. Damaged or outdated windows can cost you in electric bills — about an extra $341 a year in South Portland. The Department of Energy estimates that about 30% of your house’s heat or cool air could be going out your windows. Our guide to the top window installation companies in South Portland will help you select the right installer for you.

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Top Pick
4.1/5
  • Great quality
  • Free assesment
  • Timely Service
Most Customizable
4.0/5
  • Holds high customer ratings
  • Offers energy-efficient products
  • Provides a lifetime labor warranty
Best Customer Service
4.0/5
  • Award winning company
  • Products made in the US
  • Knowledgeable sales representatives

Top 10 Best Window Replacement Companies in South Portland

Advertisement This site receives compensation from some of the companies featured in this listing, which may impact where and how products appear. When you click "Get Quote," you will be connected with partners who may contact you with information related to your inquiry. This listing doesn't feature all companies, products, or offers that may be available.

Renewal by Andersen Window Replacement

Renewal by Andersen Window Replacement Logo

Our Rating

User Rating

66 Industrial Park Rd, Saco, ME 04072 (207) 358-6094 windowsdoorsportland.com

Price transparency

Good customer service

Educational website

Free assessment

Services Offered

Double-hung
Energy-efficient options
Vinyl frames
Custom window designs
Bay windows
Metal frames
Glass doors
Window replacement/installation

Midcoast Glass & Windows

Midcoast Glass & Windows Logo

Our Rating

User Rating

9 Monument Pl #1, Topsham, ME 04086 (207) 725-2264 midcoastglassmaine.com

Good customer service

Price transparency

Free assessment

Services Offered

Bay windows
Glass doors
Glass repair
Energy-efficient options
Glass showers
Storm/impact windows
Vinyl frames
Window replacement/installation

Lighthouse Contracting Group, LLC

Lighthouse Contracting Group, LLC Logo

Our Rating

User Rating

104 Lily Pond Rd Unit A, Gilford, NH 03249 (603) 567-4172 lighthousecontractinggroup.com

Good customer service

Free assessment

Educational website

Price transparency

Services Offered

Window replacement/installation

Rite Window

Rite Window Logo

Our Rating

User Rating

41 Industrial Dr #9, Exeter, NH 03833 (603) 945-7126 ritewindow.com

Price transparency

Educational website

Free assessment

Good customer service

Services Offered

Double-hung
Energy-efficient options
Glass showers
Glass doors
Window replacement/installation
Bay windows

The Window Source NH

The Window Source NH Logo

Our Rating

User Rating

779 Lafayette Rd Suite 1, Seabrook, NH 03874 (603) 764-7212 windowsourcenh.com

Free assessment

Price transparency

Good customer service

Educational website

Services Offered

Glass doors
Energy-efficient options
Bay windows
Window replacement/installation
Storm/impact windows
Double-hung
Vinyl frames

Southers Construction

Southers Construction Logo

Our Rating

User Rating

12 Crosby Rd, Dover, NH 03820 (603) 734-4572 southersconstruction.com

Good customer service

Timely service

Free assessment

Price transparency

Educational website

Services Offered

Double-hung
Bay windows
Window replacement/installation

Pella Windows & Doors of Newington

Pella Windows & Doors of Newington Logo

Our Rating

User Rating

25 Fox Run Rd Suite 2, Newington, NH 03801 (603) 725-4690 pellabranch.com

Educational website

Free assessment

Good customer service

Price transparency

Services Offered

Bay windows
Vinyl frames
Wood frames
Double-hung
Window replacement/installation
Glass doors

Glass Unlimited

Glass Unlimited Logo

Our Rating

User Rating

1213 Post Rd, Wells, ME 04090 (207) 646-8268 glassunlimitedme.com

Price transparency

Timely service

Good customer service

Free assessment

Services Offered

Custom glass
Window replacement/installation
Energy-efficient options
Wood frames
Glass doors
Mirrors
Glass showers

Glass Routes Co

Glass Routes Co Logo

Our Rating

User Rating

181 Littleworth Rd, Madbury, NH 03823 (603) 742-2600 glassroutes.net

Good customer service

Free assessment

Price transparency

Educational website

Services Offered

Window replacement/installation
Vinyl frames
Custom glass
Mirrors
Glass showers

Window World of Southern Maine

Window World of Southern Maine Logo

Our Rating

User Rating

2 Karen Dr Unit 5, Westbrook, ME 04092 (207) 747-5117 windowworldofmaine.com

Price transparency

Free assessment

Good customer service

Educational website

Services Offered

Window replacement/installation
Double-hung
Glass doors
Bay windows
Today's Homeowner Ranking Methodology

Today's Homeowner looks at dozens of datapoints on window replacement companies to come up with our data-driven rankings. It's not possible for a company to pay for preferential treatment in our rankings. We look at the following key factors in determining who should top our list:

  • Company Experience
  • Real User Reviews
  • Company Reputation
  • Accreditations and Licenses
  • Service Area
  • Customer Service
Have questions about our methodology or company ratings? Reach out to FindAPro@TodaysHomeowner.com.

How Much Does Window Installation Cost In South Portland?

Window installation and replacement costs depend on a number of factors, including the number and size of the windows, the materials you choose, and how difficult your windows are to access or install. On average, homeowners in South Portland should expect to spend around $280 per window*. Below are additional cost breakdowns. *Cost data based on sample pricing for window installation from multiple retailers and adjusted for local cost of living.

When To Replace Windows

Installing new energy-efficient windows can substantially boost your home's comfort, noise reduction, value, insulation, and appearance. Some clear indicators it's time to invest in new windows include the following:

  • High energy bills and a chilly house from poor insulation around windows.
  • Cold air and drafts coming in from old, loose-fitting windows.
  • Condensation issues, fogging between window panes, or rotting window frames that let in moisture.
  • Outdated and inefficient window styles that detract from your house's curb appeal.
  • Windows that are hard to open, close, and lock properly due to age and wear.

How To Choose a Window Company

Hiring a qualified window installer is critical to a successful project. Below, you'll learn the most important considerations when it comes to making your selection.

Experience

Make sure you choose an experienced local installer with a long record of successfully installing and replacing windows. Installers that have served South Portland for years are more likely to have a deep knowledge of the local climate and local homeowners' needs. Get references from recent clients to confirm a company provides quality installations.

Certifications

Choose an installer that’s accredited like leading window companies, and that has Fenestration and Glazing Industry Alliance (formerly AAMA) certification. Suitable credentials indicate they've received appropriate instruction in installation best practices. Verify that installers are staff, not subcontracted laborers, and confirm that any technicians working on your home have certification.

Reputation

Spend time looking through online reviews, checking the Better Business Bureau, and requesting local references. Review customer feedback to confirm that the company regularly provides good workmanship and service. Steer clear of companies with complaints of poor or incomplete work.

Process

The highest-quality window installers will supply a comprehensive project plan and schedule, clear expectations, and an overview of all product and installation options. Avoid companies that offer unclear quotes or timelines that don't provide specifics upfront. Look for consistent contact throughout to avoid surprises once work gets underway.

Warranties

Research window installers that assure quality installations and provide warranties on materials and labor. This is a sign of expert workmanship. Select companies with unlimited lifetime warranties that transfer to new homeowners.

Materials

Verify that your window company works with trusted, long-lasting brands, offers energy-efficient window options, and fits your budget. Look for window options with enhanced UV protection, design flexibility, and good energy ratings. Check whether the materials come with their own manufacturer warranties.

Frequently Asked Questions About Window in South Portland, ME

In South Portland, the optimal time to install windows is during the late spring or early summer when the temperatures are not as cold, so the windows can seal and adjust properly. A good local window installer in South Portland will be able to tell you when the best time is to install windows on your house.

The best type of replacement windows for your South Portland home depends on the year your home was built –the average house in South Portland was built around 1955. If your home was built a while ago, you might want to consider energy-efficient windows such as double-glazed windows, which are designed to keep your home cool in the summer and warm in the winter. Wood frames also have a classic look that's perfect for older homes. For more modern homes, you can consider vinyl windows, which are durable, affordable and have a modern look.

The types of window that typically last longest are ones made of vinyl or wood, with double glaze for extra insulation. Vinyl windows are famous for their durability and require little maintenance, while wood windows offer a more classic look. Tripling up on the glazing will help reduce energy costs over time.

If your area has lower than average energy costs, it may not be necessary to replace all your windows at once. Replacing all your windows at once can help improve your home's energy-efficiency, and could help you to save money on your energy bills over time. This is especially beneficial in a place like South Portland, where energy bills tend to be high.

In some cases, you can replace your own windows, but it's generally recommended to hire a professional. It's important to consider the local climate when replacing windows, as it will affect the process. For example, the temperatures in South Portland can reach an average low of 39, so you should consider energy-efficient windows that can protect from the cold. It's also important to get the measurements right and understand the instructions for installation. Hiring a professional for your window replacement project will ensure that everything is installed correctly.

Getting windows professionally installed can provide a number of benefits. Professional installers can guarantee that your windows are properly fitted, sealed, and insulated, preventing air leakage and maximizing energy efficiency. Professional installers are also well-equipped with the necessary tools and techniques to do the job right, which can save you time and money.

Other South Portland, ME Home Services

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