Do your windows feel drafty in the winter or hot during summer? Do you keep your heater or air conditioner running all day just to stay comfortable? If you live in South Carolina, this might be a big problem, but there is good news.
In 2026, there are grants and programs that can help you replace old windows with energy-efficient ones. These new windows help keep your home warmer in the winter and cooler in the summer. They also help lower your energy bills every month.
In this article, we will show you the top 10 grants available in South Carolina that can help you pay for energy-efficient window replacements. These grants are for homeowners, low-income families, veterans, seniors, and others who want a more comfortable and energy-saving home.
In 2026, homeowners in South Carolina can get free or low-cost energy-efficient window replacements through programs like WAP, LIHEAP, USDA grants, and utility rebates. These programs help reduce energy bills, improve home comfort, and support low-income families, seniors, and veterans.
Why You Can Trust This Guide
This guide is created using verified government programs, energy assistance resources, and official housing support data available for South Carolina in 2026. All programs listed are real and actively used by homeowners, seniors, and low-income families.
Data Sources and Verification
- Federal energy assistance programs
- USDA Rural Development housing grants
- State-level South Carolina energy programs
- Utility company rebate programs
- Nonprofit housing assistance organizations
What Are Energy-Efficient Windows?
Let us start with the basics. What does “energy-efficient windows” mean?
Energy-efficient windows are made to keep heat inside during the winter and block out heat in the summer. They help your home stay at the right temperature without using too much heating or cooling.
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They have:
- Special glass (called Low-E glass)
- Better seals that stop air leaks
- Two or three layers of glass for better insulation
- Frames that do not let heat or cold escape easily
When you install these windows, your home uses less electricity or gas, which means lower bills and a smaller carbon footprint.
Why Replacing Old Windows Matters
Old windows can be a big problem. They might:
- Let in cold air in winter or hot air in summer
- Have cracks or broken seals
- Be made of old materials that waste energy
- Causes higher energy bills every month
In South Carolina, where summers are hot and winters can be chilly, having poor windows makes your home uncomfortable and expensive to heat or cool.
Replacing old windows with energy-efficient ones is not just about looks. It is about saving money, making your home safer, and being kind to the environment.
Who Can Get Window Replacement Grants?
Grants are free money that you do not have to pay back. They are usually given by the government, energy companies, or non-profit organizations. In South Carolina, you may qualify for window replacement help if you are:
- A low-income family
- A senior citizen
- A veteran
- Living in a rural area
- A person with a disability
- A homeowner looking to improve energy use
Let us explore the top 10 grants and programs available in South Carolina.
Top 10 Grants for Energy-Efficient Window Replacements in South Carolina
Weatherization Assistance Program (WAP)
The Weatherization Assistance Program is a federal program that helps low-income families save energy. In South Carolina, this program is run by local community action agencies.
What it does:
- Helps pay for new windows and other home upgrades
- Improves energy use and comfort
- Makes homes safer and healthier
Who qualifies:
- Low-income families
- Seniors
- People with disabilities
How to apply:
- Find your local community action agency
- Fill out the application
- Provide income documents and utility bills
To get started, search online for “South Carolina Weatherization Assistance Program + your county.”
South Carolina Energy Office Incentive Programs
The South Carolina Energy Office offers programs to support energy upgrades. These include rebates, loans, and sometimes grants for things like energy-efficient windows.
What it offers:
- Rebates to help reduce the cost of energy-efficient home improvements
- Educational help to find the right programs
Who qualifies:
- Homeowners and renters
- Anyone planning energy-efficient upgrades
How to apply:
- Visit the South Carolina Energy Office website
- Look under the “Residential Energy Efficiency Programs” section
- Apply through linked utility programs or state programs
This is a great place to find many state-supported opportunities in one place.
Low-Income Home Energy Assistance Program (LIHEAP)
LIHEAP is a federal program that helps low-income households with energy costs. While it mostly pays energy bills, it sometimes helps with repairs and upgrades that reduce energy use, including window replacements.
What it does:
- Helps pay for home energy improvements
- Supports emergency home energy repairs
Who qualifies:
- Low-income households
- People who receive SNAP, SSI, or other benefits
How to apply:
- Apply through your local LIHEAP office or Department of Social Services
- Submit proof of income, ID, and utility bills
Even if it does not pay for windows directly, LIHEAP can make your home safer and reduce other costs.
USDA Rural Development Single Family Housing Repair Grants
If you live in a rural area, the USDA may be able to help.
What it does:
- Offers up to $10,000 in grants to very low-income homeowners
- Covers health and safety upgrades, including new windows
Who qualifies:
- People age 62+
- Very low-income homeowners in rural areas
- Must own and live in the home
How to apply:
- Visit the USDA Rural Development site
- Find the Single Family Housing Repair Loans & Grants section
- Submit your application with help from a USDA representative
This program is especially helpful for seniors in small towns or rural communities.
Energy Efficient Mortgages (EEMs)
If you are buying a home or planning big upgrades, you can use an Energy Efficient Mortgage to help pay for energy-saving changes.
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What it does:
- Adds the cost of new energy-efficient windows to your home loan
- Helps pay for upgrades upfront
- Lower energy bills help offset the loan cost
Who qualifies:
- People buying, refinancing, or improving a home
- Must meet lender and energy-saving requirements
How to apply:
- Talk to a lender that offers EEMs
- Get a home energy audit
- Add window upgrade costs to the loan
This is not a grant, but it is a smart way to fund big upgrades like window replacement.
Dominion Energy EnergyWise Rebates
If you get electricity from Dominion Energy, you may be eligible for rebates when you install energy-efficient windows or make other upgrades.
What it does:
- Gives cash rebates for qualifying energy upgrades
- It may help lower your upfront costs
Who qualifies:
- Dominion Energy South Carolina customers
- Homeowners making improvements
How to apply:
- Visit Dominion Energy’s website
- Look for the “EnergyWise for Your Home” program
- Apply for rebates after installation
Be sure to use approved contractors and follow all rebate rules.
Community Development Block Grants (CDBG)
CDBG is a federal program that gives money to cities and towns in South Carolina. The money helps low-to-moderate income families make important home repairs.
What it does:
- Helps improve housing in poor or older neighborhoods
- May pay for energy-efficient window upgrades
Who qualifies:
- Based on income and location
- Must live in an area where your city or county uses CDBG funds
How to apply:
- Contact your local housing department or city hall
- Ask if CDBG funds are available for housing repairs
These programs vary by city, so it is worth calling your local office.
Local Utility Company Incentives
Some local energy providers in South Carolina offer incentives to make homes more energy-efficient.
What they offer:
- Rebates or discounts for installing energy-efficient windows
- Free energy audits
Who qualifies:
- Customers of the utility company
- Must follow program guidelines
How to apply:
- Call your local utility company
- Ask about home energy efficiency or window rebate programs
Do not forget smaller utility companies – many offer hidden gem incentives.
Federal Tax Credits for Energy Efficiency
The U.S. government offers tax credits for certain home improvements. In 2026, you can get up to 30% back on the cost of energy-efficient windows.
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What it does:
- Gives money back when you file your federal taxes
- Helps lower the cost of new windows
Who qualifies:
- Homeowners who install qualifying energy-efficient windows
- Must keep receipts and get ENERGY STAR-rated products
How to apply:
- Install new windows
- File Form 5695 with your tax return
You do not get money up front, but you get money back next tax season.
Help from Nonprofit Groups and Charities
Several nonprofit organizations in South Carolina help families with home repairs, including windows.
Examples include:
- Habitat for Humanity
- Rebuild Upstate
- Local church groups and housing nonprofits
What they do:
- Offer free or low-cost home repairs
- Help low-income, senior, and disabled residents
How to apply:
- Contact local nonprofits or housing assistance offices
- Ask if they offer energy-efficiency home upgrades
These groups may not advertise grants, but often help quietly and directly.
Expert Tips to Maximize Your Benefits
- Always apply to at least 3 programs to increase approval chances
- Schedule a free home energy audit before applying
- Use ENERGY STAR-certified windows to qualify for maximum benefits
- Keep all receipts and documents for tax credits
How to Apply for Window Replacement Grants in South Carolina
Follow these simple steps to apply for window replacement grants in South Carolina.
- Check your income eligibility and gather proof documents
- Collect your home details like utility bills and ID
- Search programs using your ZIP code
- Apply to multiple grants and rebate programs
- Follow up and wait for approval
Extra Tips to Save Even More
Get a home energy audit – many programs offer it for free.
Look for ENERGY STAR-certified windows – most programs require this.
Use trusted contractors to make sure you qualify for rebates.
Check if your city or county has its own small programs.
Frequently Asked Questions
Here are answers to common questions about window replacement grants in South Carolina.
What are energy-efficient windows?
Energy-efficient windows are made to keep heat inside during the winter and block out heat in the summer. They help your home stay at the right temperature without using too much heating or cooling.
Who qualifies for window replacement grants in South Carolina?
You may qualify if you are a low-income family, senior citizen, veteran, rural homeowner, or a person with a disability.
Can I get free window replacement in 2026?
Yes, programs like Weatherization Assistance Program and USDA grants may cover full or partial costs.
How much tax credit can I get for windows?
You can get up to 30% back on the cost of energy-efficient windows in 2026.
Can I apply for multiple programs?
Yes, you can combine rebates, grants, and tax credits to reduce your total cost.
Conclusion
Replacing your old windows with energy-efficient ones can make your South Carolina home more comfortable, safer, and cheaper to heat and cool. You do not have to pay for it all by yourself. From federal grants to local programs, there is a lot of free help available in 2026.
Whether you are a senior, a veteran, a low-income homeowner, or someone just looking to save, these 10 programs can help you take a big step toward a better home.