Rock County, WI Housing & Rental Market Report: September 2026

Rock County, WI Housing & Rental Market Report: September 2026 | Wisconsin Property Managers

The market in one read

Demand remained strong while active for-sale inventory contracted year over year. Asking prices and sold-price measures tell different stories, and rental asking prices softened countywide.

Key facts for September 2026

The median sold home price in Rock County, WI was $300,000 in September 2026, unchanged from a year earlier.
The median asking price for homes in Rock County, WI was $383,338 in September 2026, up 5.72% from a year earlier.
Rock County, WI had 726 homes actively listed for sale in September 2026, down 8.45% from a year earlier.
The median rent in Rock County, WI was $1,450 per month in September 2026, down 2.49% from a year earlier.

Janesville–Beloit’s rank among the nation’s hottest housing markets in September, unchanged from a year earlier.

realtor.com hotness report ↗

3.2×U.S. viewers per property

40 daysMetro median time on market, +1 day YoY

Median sold price$300,000

−3.30% MoM · 0.00% YoY

realtor.com ↗

Median asking price$383,338

+0.61% MoM · +5.72% YoY

realtor.com ↗

Active listings726

−0.15% MoM · −8.45% YoY

realtor.com ↗

Median rent$1,450

−4.10% MoM · −2.49% YoY

realtor.com ↗

See the trendHow Rock County’s for-sale market changed month by month over the last 2 years — October 2024 to September 2026.

Oct 2024$331,700First month shown

Sep 2026$383,599Latest month

Change+15.6%+$51,899

Low$319,900Nov 2024

High$384,900May 2026

September 2026: Median listing price was $383,599. Tap or click any point for another month.

Monthly data table (all four measures) +

For-sale market

Rock County was characterized as a “very hot” seller’s market. Homes sold at approximately asking price, and median time on market was 44 days.

Three measures of price

September 2026 · countywide, except hotness listing figure (metro)

Realtor sold

$300,000

Redfin sale

$306,813

Realtor asking

$383,338

Sold medians differ because Realtor.com and Redfin use different datasets and methodologies. Asking price is not a sale-price forecast.

Realtor.com ↗Redfin ↗

County indicators

Realtor.com “Key indicators as of September 2026”

Janesville vs. Beloit

Janesville posted the higher sold median and faster market. Beloit had lower prices and a much steeper year-over-year decline in active inventory.

Metric	Janesville · MoM / YoY		Beloit · MoM / YoY
Median listing	$374,900	−2.56% / +10.93%	$332,450	+8.74% / +0.13%
Median sold	$325,000	+2.50% / +10.92%	$235,050	+1.75% / +4.00%
Listing $/sq ft	$188	+0.05% /

Rental performance

September data point to a looser countywide market: asking rents declined while active listings rose 70.6% year over year. Platform coverage differs, so medians, averages and HUD benchmarks are kept separate.

Rock County median asking rent

$1,450

−4.10% MoM · −2.49% YoY

Janesville median$1,400−6.67% MoM · 0.00% YoY

Beloit median$1,525+1.67% MoM · +2.56% YoY

Realtor.com · September 2026 ↗

Active rental inventory

Realtor.com active for-rent listings · September 2026

County

Janesville

Economic & financing context

Rates moved higher through September. The latest local labor reading available was August; statewide housing data also lagged by one month.

30-year fixed mortgage rate

Freddie Mac PMMS, weekly September readings

6.76%week ending ~Sep 10

6.95%week ending ~Sep 17

7.03%week ending ~Sep 24

Sep 10 ↗Sep 17 ↗Sep 24 ↗

Wisconsin’s latest read

August 2026; September report was not yet published

How to read this report

Different providers observe different slices of the market. These notes preserve the limits attached to each figure.

Two valid sold-price medians

Realtor.com reports $300,000 and no year-over-year change; Redfin reports $306,813 and +4.9% YoY. They use different listing, closing, MLS and/or public-record inputs, so neither should be substituted for the other.

Ask-side and sale-side measures are not interchangeable

The $383,338 county median listing price and $384,000 metro hotness listing price are asking measures. Sold medians are more than $80,000 lower, likely reflecting the mix of properties that actually closed.

Rent sources answer different questions

Realtor.com reports the median of all active rental listings. Apartments.com/CoStar reports apartment-focused average asking rents; single-family rentals are underrepresented and Milton/Edgerton samples are thin. RentalSource reports averages from its own listings. HUD FMR is a 40th-percentile gross-rent policy benchmark, not a market average. These measures should not be substituted for one another.

Rental provenance

Source directory

Direct links used in the report, with data vintage where known.

Own a Property in Rock County?

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Past reports

October 2026

Scope note: September 2026 figures are labeled as such; lagging regional or national measures are identified in place. No Rock County rental-vacancy, local concession/lease-term series, Rentometer percentile comps or September WRA county report was available when this report was refreshed October 13, 2026.

Month	Median listing price	$/sq ft	Days on market	Active listings
October 2024	$331,700	$183	44 days	283
November 2024	$319,900	$181	58 days	257
December 2024	$327,475	$184	63 days	234
January 2025	$336,700	$189	65 days	202
February 2025	$342,653	$193	56 days	185
March 2025	$337,773	$190	44 days	198
April 2025	$343,250	$197	41 days	202
May 2025	$355,000	$194	37 days	198
June 2025	$367,453	$199	40 days	226
July 2025	$376,200	$202	43 days	242
August 2025	$369,900	$199	38 days	300
September 2025	$362,400	$192	39 days	325
October 2025	$351,975	$189	43 days	334
November 2025	$349,900	$192	45 days	343
December 2025	$354,198	$198	56 days	302
January 2026	$354,900	$198	69 days	264
February 2026	$356,900	$201	66 days	255
March 2026	$355,668	$199	46 days	247
April 2026	$369,578	$201	44 days	238
May 2026	$384,900	$201	45 days	258
June 2026	$379,925	$200	44 days	284
July 2026	$380,888	$197	41 days	288
August 2026	$383,338	$199	44 days	297
September 2026	$383,599	$200	40 days	336

Janesville vs. Beloit by bedroom

Average asking rent · Apartments.com / CoStar · September 2026

Unit	Janesville	Beloit
Studio	$1,152	$823
1 bedroom	$1,164	$1,266
2 bedroom	$1,205	$1,285
3 bedroom	$1,688+	$1,508+
4 bedroom	Not published: Apartments.com/CoStar did not publish a 4-bedroom average for this city	Not published: Apartments.com/CoStar did not publish a 4-bedroom average for this city

Janesville ↗Beloit ↗

Median asking rent by ZIP

Realtor.com active listings · September 2026

53545 · Janesville	$1,400
53546 · Janesville	$1,800
53548 · Janesville	$1,400
53511 · Beloit	$1,525
53512 · Beloit	Not published: Realtor.com did not publish a median for this ZIP (thin or unavailable listing sample)
53534 · Edgerton	Not published: Realtor.com did not publish a median for this ZIP (thin or unavailable listing sample)
53563 · Milton	Not published: Realtor.com did not publish a median for this ZIP (thin or unavailable listing sample)

“Not published” ZIP cells reflect thin or unavailable listing samples; they are not $0 rents.

Realtor.com · September 2026 ↗

FY2026 Small Area FMRs by ZIP

Republished HUD schedule · updated October 1, 2025 · gross monthly rent

ZIP / area	Studio	1 BR	2 BR	3 BR	4 BR
53511 · Beloit	$880	$940	$1,220	$1,560	$1,620
53512 · Beloit	$900	$960	$1,250	$1,600	$1,660
53534 · Edgerton	$990	$1,160	$1,360	$1,750	$1,950
53545 · Janesville	$910	$970	$1,260	$1,610	$1,670
53546 · Janesville	$920	$970	$1,270	$1,630	$1,680
53547	$900	$960	$1,250	$1,600	$1,660
53548 · Janesville	$900	$960	$1,250	$1,600	$1,660
53563 · Milton	$870	$930	$1,210	$1,550	$1,600
53576	$1,020	$1,080	$1,410	$1,810	$1,870

BNBCalc republication of HUD schedule ↗Official HUD FY2026 SAFMR lookup ↗

The official HUD lookup would not submit in the research browser; the displayed ZIP values were read from BNBCalc’s republication and should be cross-checked in HUD’s lookup for formal voucher use.

Listing $/sq ft	$199	+2.29%	+4.22%
Days on market	44 days	−11.11%	−3.03%
Sale-to-list	~100%	—	—
Redfin sale price	$306,813	—	+4.90%

Existing home sales	−8.3% YoY
State median	$362,000 · +7.10%
Inventory	4.4 months
South Central sales	−0.9% YoY

September 2026 market snapshot Rock County residential real estate

The market in one read

Key facts for September 2026

For-sale market

Three measures of price

County indicators

Janesville vs. Beloit

Rental performance

Active rental inventory

Economic & financing context

30-year fixed mortgage rate

Wisconsin’s latest read

How to read this report

Source directory

Own a Property in Rock County?

Past reports

City rent profiles

Janesville

Beloit

Milton

Edgerton

Janesville vs. Beloit by bedroom

Median asking rent by ZIP

HUD Fair Market Rents

FY2026 Small Area FMRs by ZIP

Velocity, vacancy & concessions

Open data gaps

Not available as of October 13