Algonquin, IL Housing Market 2026: What Homes Actually Sell For

If you invest in or around Algonquin, the number that matters is what homes actually close for, not what sellers are asking. Here is what Algonquin sale prices look like right now, built from the closings Resideline tracked over the last six months, as of September 2026.

The snapshot

• •Closings tracked, last 6 months: 279
• •Median sold price, last 6 months: $413,500
• •Median sold $/sqft, last 6 months: $205
• •Middle half of sales closed between: $345,000 and $536,000

What the numbers say

Resideline tracked 279 closed sales in Algonquin over the last six months, with a median closing price of $413,500. That median is the midpoint of what buyers actually paid, not what sellers hoped to get, which is why it moves differently from the asking prices you see on listing sites. The middle half of those sales closed between $345,000 and $536,000. That spread matters more than the headline median: where a specific property sits inside it decides whether the citywide number helps you or misleads you. These are the closings Resideline tracks and may differ from complete county or municipal records. Across the 276 closings with usable living area, the middle half sold between $186 and $233 per square foot.

Figures last updated September 6, 2026 from closings Resideline tracked.

Median home price in Algonquin, IL (September 2026)

The median home price in Algonquin is $413,500, measured across the 279 closed sales Resideline tracked over the last six months. The middle half of those sales closed between $345,000 and $536,000.

Where Algonquin sale prices land

Medians hide the shape of a market. The distribution above covers the closed sales Resideline tracked in Algonquin over the last six months that carry a usable sale date, trimmed to the 5th through 95th percentile, with the middle half of sales closing between $345,000 and $536,000. Among the 91 Illinois markets with a published band, Algonquin's middle-half spread ($345,000 to $536,000) ranks 17th from the narrowest. Where your target property sits inside that spread matters more than the citywide median. Measured as the ratio of the upper to the lower quartile, its middle-half spread ranks in the 32nd percentile of the 2,187 US markets in Resideline's national Market Watch set, on data as of September 4, 2026.

How long a sale takes here

• •Listed to under contract: a median of 25 days, across 87 Algonquin closings Resideline tracked in the last six months
• •Contract to closing: a median of 17 days, across 38 Algonquin closings Resideline tracked in the last six months

The Algonquin angle

Algonquin's tracked six-month record: 279 closings, a median closed sale price of $413,500, with half of all sales closing between $345,000 and $536,000. The overall spread is close to typical for the markets we track, but its balance is not: the distance from the median up to the upper quartile is more than double the distance down to the lower quartile. For pricing, that means a below-median estimate has a narrow ordinary lane to sit in, while an above-median estimate can be legitimate across a much wider stretch, provided matched closed sales support the specific number. Anchor low-side valuations firmly; interrogate high-side ones.

From market read to offer price

A market read is the backdrop. The decision still comes down to one property and one number: what it is actually worth and what you should pay. Every Resideline report opens with this same market snapshot for the subject's exact ZIP code, then gives you the property's value, the sold comps behind it, and a market rent estimate. Pricing a specific deal? The free ARV calculator and rental property calculator run the numbers in about a minute.

And we show our work. Every estimate is frozen while the home is for sale and graded against the real closing price after it sells. See the live accuracy dashboard for the receipts, or read how the Area Market Snapshot works.

Run any Algonquin address through Resideline and you will see the local market and the property's value together, in one report.

Cite this

Using these numbers? Please cite the source and the sample size:

Source: Resideline Market Watch
Market: Algonquin, IL
Geography: incorporated municipality, Census place 1700685
Data updated: September 2026
Analysis period: last six months
Tracked closings: 279
Median sold price: $413,500
Median sold $/sqft: $205 (276 qualifying)
https://resideline.com/blog/algonquin-il-housing-market

Writing about this market? Paste this into your post:

<a href="https://resideline.com/blog/algonquin-il-housing-market">
  <img src="https://resideline.com/images/embed/algonquin-il.png" alt="Algonquin, IL home sale price distribution, last six months" width="1000" style="max-width:100%;height:auto">
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<p>Source: <a href="https://resideline.com/blog/algonquin-il-housing-market">Resideline Market Watch</a></p>

The local market statistics in this report are calculated from closed sales tracked by Resideline. Transaction coverage may differ from complete county or municipal records.

Every local market figure on this page is computed from closed sales Resideline tracked in Algonquin over the last six months, and is refreshed when the data is. The closings we track within the Algonquin city limits are not limited to listing-service sales: they also include foreclosure deeds, estate and family transfers, and other off-market sales that portal medians exclude, which is why 11% of the 279 closings in this window never appeared on a listing service, and the median of MLS-listed sales alone was $415,000.