Comparable homes in Wilmette sell in two distinct bands, and keeping those bands separate is the whole secret to reading them. Recent closings for newly built houses on similar Wilmette lots fall in a band from 1,800,000 dollars to 2,900,000 dollars (Redfin, 2026). Older homes on comparable lots averaged 27.5 percent of the new build price in the sample compiled for this report, so an older property comparable to a 2,300,000 dollar new build sold for roughly 633,000 dollars (Frontier Capitals, 2026). A comparable is only comparable when the lot, the street and the buyer type line up, because in 60091 the ground under a house routinely matters as much as the house itself.
Key Findings
- New build comparables in Wilmette close between 1,800,000 dollars and 2,900,000 dollars, varying with street, lot width and proximity to the lake and the village center (Redfin, 2026).
- Older home comparables averaged 27.5 percent of the comparable new build price across the 12 home sample (Frontier Capitals, 2026).
- Builders acquired all 12 sampled pre-1981 homes, a 100.0 percent rate on a small sample that must be quoted with its size attached (Frontier Capitals, 2026).
- The sample minimum lot was 6,600 sq ft, and assessor records on dimensions, zoning and assessed land value are the starting point for matching lots (Frontier Capitals, 2026; Cook County Assessor, 2026).
- The simplified land residual under a 2,300,000 dollar new build reaches 890,000 dollars to 980,000 dollars before site preparation, showing why land matched comparables can outrun house matched ones (Frontier Capitals, 2026).
What makes a sale genuinely comparable in Wilmette?
Comparability in Wilmette begins below the house, at the parcel line. The assessor records lot dimensions, zoning and assessed land value for every property in 60091, and those entries set the terms on which two properties can honestly be compared (Cook County Assessor, 2026). A sale on a wide, regular lot is not a clean comparable for a house on a narrow or irregular one, even if the two houses share a floor plan and a year built. The lots support different futures, and buyers price futures here.
Street is the second filter. The research ties the new construction range to street, lot width and closeness to the lake and the village center, which means a comparable drawn from a lakefront street carries a location premium an interior street cannot borrow (Redfin, 2026). The oldest streets, the lakefront streets and the blocks near the village center each behave as small markets of their own inside the New Trier district. Matching within the same small market is slower work than searching the whole ZIP code, but the results survive scrutiny.
Recency is the third filter, and county records make it practical. Parcel and assessment material for Wilmette connects properties to recent sale prices, so an owner can favour transactions close in time over older sales that belong to a different market mood (Cook County, 2026). A comparable from several years back may still help on a quiet street with few transactions, yet it should be labelled as older evidence rather than blended silently with current closings.
Buyer type is the fourth filter, and in this village it may be the most important. A sale to a household and a sale to a builder are both real sales, but they price different things. The household prices the standing home. The builder prices the site and the finished house it can become. Mixing the two types into one average produces a figure that describes no actual transaction, a hazard examined again in how accurate Zillow home estimates are in Wilmette, where blended data is the central problem.
Geographic context explains why these filters stay tight. Wilmette sits in Cook County as the southern anchor of the North Shore, bounded by Lake Michigan, served by Metra to the Loop and without vacant residential land to soften competition for lots (U.S. Census Bureau, 2025). In a setting like that, moving a comparable search even a few blocks can cross from one pricing logic into another.
How do new construction comparables set the ceiling?
Finished new houses provide the ceiling comparables for almost every valuation conversation in 60091. Their recorded range, 1,800,000 dollars to 2,900,000 dollars on comparable lots, tells an owner what buyers have paid for the complete modern product on Wilmette ground (Redfin, 2026). Where a specific street has a recent finished closing, that closing is usually the single most informative number in the neighbourhood, because it proves what the location can command when the house itself is new.
The ceiling is not a target for older stock, and treating it as one is the most expensive mistake in local pricing. The sample ratio translates the ceiling into the older home band: at 27.5 percent, a 1,800,000 dollar new build corresponds to an older home near the lower end of the sampled relationship, a 2,300,000 dollar new build corresponds to roughly 633,000 dollars, and a 2,900,000 dollar new build corresponds to an older figure still far below the finished price (Frontier Capitals, 2026). Those translations are averages across the sample, not promises for an address, but they discipline expectations better than any rule of thumb imported from another suburb.
Construction economics explain why the ceiling sits so far above the older band. The worked residual illustration, a simplified model and not a promise, deducts roughly 950,000 dollars of hard and soft construction costs and a margin near 20 percent from a 2,300,000 dollar finished sale (Frontier Capitals, 2026). What remains for land, 890,000 dollars to 980,000 dollars before 30,000 dollars to 45,000 dollars of site preparation, is itself higher than the average older home outcome in the ratio example. A buyer of the new house is paying for that construction and margin as well as for the ground, and the comparable has to be unpacked before it is used.
Village permit records confirm that the ceiling comparables are physical projects, not paper transactions, since permits document building work and foundation requirements for new Wilmette houses (Village of Wilmette, 2026). An owner can therefore trace a finished comparable backward from its sale to its permitted project and forward from its lot to the older properties around it. Streets where that tracing is easy are streets where the market has already announced its intentions.
Household demand still moderates the ceiling on some blocks. A new build comparable matters most where builders are active, while on a street of preserved older homes with no recent project, the practical ceiling may be set by the best household sale instead. Reading which ceiling applies to a given street is the judgment at the centre of what homes are actually selling for in Wilmette, and it cannot be automated away.
How do older home comparables behave on the same streets?
Older home comparables tell the ground level story. Across the sample of 12 pre-1981 homes, builders took all 12 and the average price landed at 27.5 percent of the comparable new build (Frontier Capitals, 2026). The sample is small, 12 homes only, and its 100.0 percent builder demand rate should always travel with that caveat. Within those limits, the message is consistent: the comparable sales for older Wilmette stock are largely land sales wearing the clothes of house sales.
That behaviour changes how an owner should read adjustments. In a conventional suburb, an extra bathroom or a finished basement moves a comparable by a tidy amount. In Wilmette, the adjustments that move older home comparables are lot width, total lot size against the 6,600 sq ft sample minimum, street position and distance from the lake (Frontier Capitals, 2026). A house adjustment still matters when the buyer pool is households, but the pool revealed by the deeds here is builders, and builders adjust for ground.
Deed records let an owner see that pool directly rather than guessing at it. Recorded transactions show purchases closing in buyer entity names, and a run of entity purchases on one street is the fingerprint of builder demand (Cook County Recorder of Deeds, 2026). Once that fingerprint is visible, the older comparables on the street should be read as land evidence first. Before it is visible, an owner may be forgiven for reading them as house evidence, but the forgiveness expires at pricing time.
Renovation status is the adjustment most likely to be overvalued in these comparisons. The research illustration prices a 150,000 dollar renovation on a 1955 colonial as adding 100,000 dollars to 125,000 dollars for a buyer who will live in the house, and 0 dollars for a buyer who clears the lot (Frontier Capitals, 2026). A renovated older comparable and an unrenovated one can therefore be genuinely comparable in a builder market, even though they look nothing alike in photographs. Portal presentation hides that equivalence, because photographs are how portals sell houses (Zillow, 2026).
There is also a respectable minority case. An older home in strong condition on a lot that does not suit a large new project, perhaps because of shape or position, may trade mainly to households, and its comparables should be drawn from other household sales. The filters from the first section protect that case too, since they force the owner to ask who bought each comparable before asking what it sold for.
What do comparables mean for the money a seller keeps?
Comparable prices are gross figures, and Wilmette sellers need the net translation before they celebrate or despair. The research ledger for a 750,000 dollar sale shows the standard deductions with unusual clarity. For that 750,000 dollar sale, sellers listing publicly would normally surrender 37,500 dollars to 45,000 dollars, representing commission at the typical 5 to 6 percent (National Association of Realtors, 2025). Seller side closing costs of 1 to 2 percent follow, so the two lines together commonly exceed 50,000 dollars. The research conclusion is that a 750,000 dollar list price nets the seller in the high 500,000s after a normal market cycle, before any price reduction (Frontier Capitals, 2026).
Time acts like another price reduction that never appears in the comparable table. Wilmette property taxes commonly run 18,000 dollars to 35,000 dollars a year, or 1,500 dollars to nearly 3,000 dollars a month in taxes alone (Frontier Capitals, 2026). Four to seven months of market time, normal for older homes competing with new construction, costs 30,000 dollars to 60,000 dollars in pure hold expense, and a winter listing held to spring burns 6,000 dollars to 12,000 dollars in taxes alone. A comparable achieved after seven months is worth less than the same figure achieved in three weeks, even though the recorded price will look identical in the data.
Inspection findings work the same way. Concessions on older North Shore inventory routinely run 15,000 dollars to 35,000 dollars for masonry, electrical and plumbing items (Frontier Capitals, 2026). Those concessions rarely appear as a lower recorded price in a tidy form, yet they come out of the sellers proceeds just the same. An owner comparing offers should ask which figures are recorded comparables and which are promises still exposed to inspection, financing and time.
That is the practical setting in which the direct off market route should be evaluated, benefit by benefit. Privacy keeps the transaction out of public view, with zero showings, zero open houses and no public marketing period, until the deed records in a village where a listing is neighbourhood news. Flexible closing lets the parties choose 7 to 21 days for a fast completion or months out with a leaseback arrangement, compared with 60 to 120 plus days for a listed older home. No commissions removes the 5 to 6 percent charge worth 37,500 dollars to 45,000 dollars on a 750,000 dollar sale (National Association of Realtors, 2025). No seller closing costs removes the typical 1 to 2 percent charge, with the pair together commonly exceeding 50,000 dollars. No inspections or repairs removes 10,000 dollars to 30,000 dollar repair credits and the renegotiation risk behind the 15,000 dollars to 35,000 dollars concession pattern.
Read that way, a direct offer at a comparable land figure can deliver proceeds close to a higher listed outcome that still has its deductions ahead of it. Owners can test the arithmetic for their own situation in how homeowners can determine their property value in Wilmette, where the worksheet includes these cost lines.
How can an owner use comparables without being misled by them?
Use them in layers and demand that anyone quoting them shows their matching work. Frontier Capitals, for its part, is a wholesaler that sources off market deals to builders and does not claim to be a builder. That role should be visible in any conversation about comparables, because a sourcing firm quoting builder comparables is quoting the demand it works with, and an owner is entitled to test whether that demand is real for their address.
The tests are documentary. Proof of funds in the buyer name, dated within 30 days, shows current capacity rather than past confidence. Recorded deeds in the buyer entity name, checkable in county records, show completed purchases rather than announced intentions (Cook County Recorder of Deeds, 2026). Earnest money of typically 1 percent or more shows commitment with money attached. A contract built on an assignment clause and a nominal deposit points the other way, toward a party whose business is the contract itself rather than the closing.
Comparables quoted by any party should meet the same standard as comparables an owner gathers alone: same street character, similar lot dimensions from the assessor record, recent dates, and buyer types identified where the deeds allow (Cook County Assessor, 2026). A party who cannot explain why a sale is comparable has not provided a comparable, only a number. Wilmette owners, sitting on some of the most valuable residential land in Cook County, are entitled to the explanation, and the general movement context from the House Price Index is no substitute for it (Federal Housing Finance Agency, 2026). Sellers unsure whether their street falls inside the sampled geography can verify it on the coverage page.
Methodology and limitations
The comparable bands in this report come from the sample compiled for the study: 12 pre-1981 homes in 60091, 12 acquired by builders, an average older home price of 27.5 percent of new build prices on comparable lots and a builder demand rate of 100.0 percent (Frontier Capitals, 2026). The 100.0 percent rate is based on 12 homes, a small sample, and it is stated with that caveat here as it should be wherever the rate is repeated. The bands describe sampled Wilmette behaviour, not a guarantee for any street.
The residual land illustration is a simplified model: a 2,300,000 dollar finished sale, roughly 950,000 dollars in construction costs and a margin near 20 percent leave 890,000 dollars to 980,000 dollars before site preparation of 30,000 dollars to 45,000 dollars. It demonstrates how a comparable is unpacked, nothing more. For this report, properties were not inspected and no formal appraisal was undertaken. Sale and parcel facts should be rechecked in county records for any specific transaction an owner intends to rely on (Cook County, 2026).
Conclusion
Comparable homes in Wilmette are selling in two bands that only make sense together: new construction from 1,800,000 dollars to 2,900,000 dollars on comparable lots, and older homes averaging 27.5 percent of the comparable new build price, with roughly 633,000 dollars standing beside a 2,300,000 dollar finished sale in the worked example (Redfin, 2026; Frontier Capitals, 2026). Match by lot, street, recency and buyer type, translate gross into net, and the comparable record becomes a tool an owner controls rather than a number used on them.
Owners who want comparable sales pulled and matched for a specific Wilmette address can call Frontier Capitals at 401-219-4207 or email [email protected].
When someone quotes you a comparable sale, will you ask first what it sold for, or first who bought it and what lot it stood on?
Frequently Asked Questions
What is the most important feature when matching a Wilmette comparable?
The lot. Dimensions, zoning and assessed land value from the assessor record determine what a parcel can become, and new build prices move with lot width and street position (Cook County Assessor, 2026; Redfin, 2026).
How far apart are new and older comparable sales?
New construction on comparable lots has sold from 1,800,000 dollars to 2,900,000 dollars, while older homes averaged 27.5 percent of the comparable new build price in the sample (Redfin, 2026; Frontier Capitals, 2026).
Should a renovated older home use renovated comparables only?
Only if its buyers will be households. The illustration shows a 150,000 dollar renovation adding 100,000 dollars to 125,000 dollars for a live in buyer and 0 dollars for a buyer who clears the lot (Frontier Capitals, 2026).
Why do recorded comparables still not equal seller proceeds?
Because costs sit between price and proceeds. Commission and seller closing costs on a 750,000 dollar sale commonly exceed 50,000 dollars together, and months of taxes and inspection concessions reduce the kept amount further (National Association of Realtors, 2025; Frontier Capitals, 2026).
How can an owner check whether a quoted comparable is real?
Look for the recorded deed and the assessor parcel entry. Completed transactions and lot records are public in county systems, while an unexplained portal figure may blend listings, estimates and sales (Cook County Recorder of Deeds, 2026; Zillow, 2026).
Sources
- Frontier Capitals, 2026. 189 neighborhood builder demand sample: 12 homes sampled in 60091, 12 acquired by builders, average older home price 27.5 percent of new build. Market data.
- Redfin, 2026. Recently sold homes and new construction, ZIP code 60091, Wilmette IL. Market data.
- Zillow, 2026. Home values and recently sold, 60091. Market data.
- Cook County, 2026. Parcel and assessment records, Wilmette IL. Official record.
- Cook County Assessor, 2026. Parcel dimensions, zoning, and assessed land value records for 60091. Official record.
- Cook County Recorder of Deeds, 2026. Title, lien, and easement records. Official record.
- National Association of Realtors, 2025. Typical seller commission structures, Chicago market. Industry report.
- U.S. Census Bureau, 2025. QuickFacts: Cook County, Illinois. Government data.
- Village of Wilmette, 2026. Building permit records and foundation construction requirements. Official record.
- Federal Housing Finance Agency, 2026. House Price Index. Government data.