Home » Guidance » Existing Homes

Improving or Replacing Windows in Existing Homes

Whether you would like to improve the energy performance of your existing windows or replace them with new energy-efficient windows, several options are available. The benefits of efficient windows include energy & cost savings, improved comfort, less condensation, increased light & view, reduced fading, and lower HVAC costs.

An energy audit can help you identify good strategies for more efficient windows and a more efficient house. Whichever energy efficiency measures you consider, the federal government as well as state, local, and utility programs may offer financing help or weatherization assistance.

Improve existing windows

If your existing windows are in a reasonable condition and you would like to hold on to them, there are several options for improving their energy performance.

Select new efficient replacement windows

If you are looking to replace your old windows with energy-efficient replacement windows, view Fact Sheets on Selecting Energy Efficient Windows or check out the following detailed guidance.

  1. Window replacement or retrofit options»
  2. Look for windows that qualify for ENERGY STAR and/or the Tax Credit»
  3. Compare window energy ratings»
  4. Compare typical energy cost in your climate»
  5. Select the most efficient windows for your specific house»
  6. Some guidance on window durability»
  7. Ensure proper installation»

Look for financial help or incentives

A federal tax credit is currently available for replacement windows that meet specific energy-efficiency criteria. Your utility company and local or state government may also offer rebates, low-interest loans or weatherization help. For income-eligible homeowners, the Weatherization Assistance Program offers free energy efficiency measures that may include window improvements or retrofits.