Is My House Good for Solar in Illinois? (2026)

Most Illinois homes are a good fit for solar — but not all of them, and not always right now. The three things that matter most are your roof (its age, direction, and shading), your electrical setup, and how you'll pay and how long you'll stay. Here's a 7-point checklist to size up your own home — then the honest part: only a real look at your roof and your actual usage can confirm it.

Want the quick version? Check your eligibility — about a minute, no pressure, no obligation. Or run the checklist below first.

The 7-point Illinois solar checklist

Go through these in order. The more boxes you check, the stronger a candidate your home is.

1. Your roof's age and condition

This is the big one. Solar panels last 25–30 years, so your roof should have roughly that much life left — otherwise you'll pay to remove and reinstall the panels when the roof needs replacing. If your asphalt-shingle roof is 15–20+ years old, it's usually smarter to replace it first, or at the same time. A good installer checks your roof's condition before anything else; if one skips that step, treat it as a red flag.

What to do: know your roof's age and material. If it's near the end of its life, plan the roof and the solar together.

2. Which way your roof faces

In the northern hemisphere, south-facing roof space produces the most. But direction is rarely a dealbreaker — east- and west-facing roofs still produce well (often 80%+ of optimal), and plenty of Illinois homes use a mix. A north-only roof is the weakest case.

What to do: note which way your main roof planes face. South, east, or west are all workable.

3. Shading

Panels run on sunlight, so anything that blocks the midday sun — tall trees, a neighbor's roofline, a chimney — cuts production. A little shade is fine; heavy shade across your best roof areas is the real problem.

What to do: watch your roof through the day. If the prime sections get good sun from mid-morning to mid-afternoon, you're in good shape. (The free PVWatts tool from the national renewable energy lab can estimate production for your exact address.)

4. Roof material and usable space

Asphalt shingle is the easiest and most common roof for solar; metal and standing-seam work well too. Old slate or wood-shake roofs are trickier. You also need enough unshaded area — a typical Illinois home runs around a 7-kilowatt system (roughly 16–20 panels), so you need the room for it.

What to do: picture your roof's open, unshaded sections. More usable space means more of your bill you can offset.

5. Your electrical panel

Solar ties into your home's electrical panel. Many are fine, but an older or fully loaded panel — common in homes still on 100-amp service — may need an upgrade to add solar, which is a cost worth knowing about up front.

What to do: check your panel's main breaker (it's usually labeled with the amperage). 200-amp is common and ideal; 100-amp may need a closer look.

6. Do you own the home — and how long will you stay?

Solar is a long-term asset, so it makes the most sense if you own your home and plan to stay a while. Good news for movers, though: research from Lawrence Berkeley National Laboratory and Zillow found homes with owned solar systems tend to sell for more than comparable homes without — Zillow's analysis put it at about 4.1% more. One caveat: leased systems don't carry the same bump and can add a step at sale, since the buyer has to take over the lease.

What to do: if you own and plan to stay, you're a strong candidate. If you might move soon, factor in how you'd pay, since owning versus leasing changes the resale picture.

7. Your utility and your usage

If you're on ComEd or Ameren, Illinois net-metering and incentive programs apply (a handful of cities run their own municipal utilities with different rules). And the more electricity you use, the more there is for solar to offset — the average Illinois home uses around 700 kWh a month, while a larger or all-electric home uses much more.

What to do: grab a recent bill to confirm your utility and see your usage. Higher usage and rising rates strengthen the case — here's why your ComEd bill keeps climbing.

The honest test: if you own a home with a decent roof, reasonable sun, and a normal-or-higher electric bill, you're very likely a good candidate. The only way to know for sure is a real assessment of your specific roof and usage.

Checked most of the boxes? See if your home qualifies for Illinois solar incentives — a quick, no-pressure eligibility check.

What if my home isn't perfect?

Few are, and that's fine. A roof that needs replacing soon, a shaded section, or a panel upgrade doesn't mean "no" — it just means there's a step to plan for. Plenty of workable Illinois homes have one or two of these. The factors hardest to work around are heavy shading across all your good roof space and a roof at the very end of its life with no plan to replace it.

And a reassurance about the panels themselves: modern solar is low-maintenance and durable. Quality panels lose only about half a percent of output per year and still produce strongly past 25 years, with warranties to match. You're not signing up for a constant repair project.

The honest bottom line

Most Illinois homes can go solar — the real question is whether it's the right move for your home, roof, and budget. If you own, your roof has life left and gets decent sun, and your electric bill is average or higher, you're very likely a good fit. If your roof's shot or your best sun is buried under shade, it may be worth waiting or fixing those first.

We won't pretend to know your numbers from a checklist — but we can look at your actual roof and usage and tell you straight. Wondering whether solar is even worth it for your situation? Start with is solar worth it in Illinois?, or see which programs you'd qualify for in our Illinois solar incentives guide.

Ready to find out if your home qualifies? Check your eligibility for a straight, no-pressure look at your roof, your options, and the Illinois incentives you may qualify for. Takes about a minute.

The Day Company is an independent marketing and referral resource, not an installer, utility, or government agency, and is not affiliated with ComEd, Ameren, Illinois Shines, or the IRS. This checklist is general information, illustrative only — not a guarantee of eligibility, performance, or savings. Actual suitability depends on a professional assessment of your home, roof, electrical system, and usage. Nothing here is tax, legal, or financial advice.