Illinois Weatherization Assistance Program (WAP)

Illinois Department of Commerce and Economic Opportunity (DCEO)

Available Weatherization

About This Program

Federally funded program providing free weatherization services to low-income households in Illinois. Services include insulation, air sealing, furnace repair/replacement, and energy efficiency upgrades. Administered through local agencies serving Cook County.

Full cost of weatherization services covered at no cost to homeowner

Verified against Illinois Department of Commerce and Economic Opportunity (DCEO)'s official page on 2026-06-17.

Data last verified 2026-06-09. How we verify our data.

Key Details

  • Free weatherization for income-qualified households
  • Includes insulation, air sealing, HVAC improvements
  • No cost to homeowners or renters
  • Priority for seniors, disabled, and families with children
  • Administered by local agencies in Cook County

How to Apply

Get free help applying Visit Official Program Page Track this program

(800) 252-8643

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Your application paperwork

A free program that lowers your energy bills by improving your home's energy efficiency (insulation, air sealing, heating system repair or replacement). It is income qualified and run through local agencies, and the Illinois Department of Commerce and Economic Opportunity (DCEO) administers it in Illinois.

Steps to apply

  1. Find the local weatherization agency that serves your county (use the official page above, which lists providers, or call the number there).
  2. Apply through that local agency (some areas also offer an online application).
  3. The agency checks your household income eligibility.
  4. They do a home energy audit, then install the improvements at no cost to you.
Get the official form

Documents you will likely need

  • Proof of household income for everyone in the home (or proof you get SSI, LIHEAP, or other qualifying assistance).
  • Proof you own or rent the home.
  • A recent utility bill for the home.
  • Photo ID.
Download this checklist (PDF)

Requirements vary by program and locality. Confirm the exact rules on the official program page. We can help you prepare your paperwork, but you submit it yourself.

Deadline: Year-round applications

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