CondominiumResidential
808 WILLIAMSON ST
MADISON, WI 53703
0.42 ac
Lot SizeThe size of the land the home sits on, from county records.
1925
Year BuiltThe year the home was originally built, according to county records.
Built 20064 floors114 units603–1,349 ft²
$18M
All units combinedThe sum of our current value estimates for every unit in the building — roughly what the whole building's homes are worth together.
$51K
Median unit valueThe middle unit value in this building by our estimate: half the units are worth more, half less.
$417
Median $/ft²The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.
+15.2%vs the Madison ZIP median sale $/ft² ($362)
Sales Performance
$525K
Median sale (12 mo)The middle sale price among this building's units that sold in the last 12 months, from recorded deeds.
+87.3%
1-yr changeHow the building's median sale price over the last 12 months compares with the 12 months before that.
14
Sales (12 mo)Units in this building that sold in the last 12 months, from recorded arms-length deeds.
12.3%
Turnover (12 mo)The share of units that changed hands in the last 12 months. Around 4–6% a year is typical; much higher can signal investor churn or a wave of exits.
This building's own appreciationThe building's own appreciation: for every unit that sold twice (held over a year), we compute its yearly price change between the two sales and take the middle value. This is the cleanest read on how this specific building performs, because it compares each unit to itself.
+5.2%per yeartypical hold 4.7 yrsfrom 108 same-unit resales
Median sale price (yearly, all time)Every recorded arms-length sale in the building since records begin, grouped by year: the bars count sales and the line tracks the median price paid.MedianSales
20062009201120142017202020222026
Sale price per ft² (yearly, all time)The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.$/ft²
20062009201120142017202020222026
207 arms-length sales on record for this building.
Unit Mix & Floor PlansThe building's recurring floor plans, found by grouping units with identical beds, baths and square footage in county records. Larger groups are the building's standard layouts; leftover units have one-off sizes.
Every unit: size vs estimated valueEvery unit in the building as one dot: across is its size, up is our current value estimate, and color is its bedroom count. Vertical columns of dots are recurring floor plans; the height spread within a column shows how much floor, view and condition move prices for the same layout.
1 bd2 bd
Studio
82 units$51K
1 bed
18 units$343K · $411/ft²
2 bed
14 units$515K · $422/ft²
Recurring floor plansThe building's recurring floor plans, found by grouping units with identical beds, baths and square footage in county records. Larger groups are the building's standard layouts; leftover units have one-off sizes.
1 bd · 1 ba · 991 ft²
3 units$401K · $404/ft²
2 bd · 2 ba · 1,229 ft²
3 units$527K · $429/ft²
1 bd · 1 ba · 603 ft²
2 units$253K · $419/ft²
1 bd · 1 ba · 806 ft²
2 units$353K · $438/ft²
2 bd · 1 ba · 831 ft²
2 units$397K · $477/ft²
1 bd · 1 ba · 865 ft²
2 units$347K · $401/ft²
1 bd · 1 ba · 944 ft²
2 units$366K · $388/ft²
2 bd · 2 ba · 1,258 ft²
2 units$520K · $413/ft²
One-off layouts
96 units
Value DistributionHow the building's units spread across value ranges by our current estimates. A wide spread usually means big differences in size, floor or view.
$46K–$63K
82 units
$251K–$303K
4 units
$318K–$372K
10 units
$391K–$426K
6 units
$469K–$505K
5 units
$524K–$581K
7 units
Value by Floor & LineAverage estimated price per square foot by floor range, using unit numbers to infer floors. Higher floors usually price higher — the gap shows how much the view is worth here.
Floor 1
$420/ft²4 units · +1%
Floor 2
$424/ft²10 units · +2%
Floor 3
$420/ft²10 units · +1%
Floor 4
$422/ft²8 units · +1%
Unit lines by $/ft²Condo units stacked vertically share a unit line — the last digits of the unit number (like 05 in 1205, 1305, 1405). Lines share a layout and exposure, so comparing estimated $/ft² by line shows which position in the building commands a premium.
Line ·01
$440/ft²4 units · +6%
Line ·02
$434/ft²4 units · +4%
Line ·05
$425/ft²3 units · +2%
Line ·03
$418/ft²4 units · +0%
Line ·08
$415/ft²3 units · +0%
Line ·06
$412/ft²3 units · -1%
Line ·07
$406/ft²3 units · -3%
Line ·04
$390/ft²4 units · -6%
Ownership & Financing
Owner-occupiedThe share of units where the owner lives in the unit, per county records. The rest are second homes or rentals.70%
Company-ownedUnits owned through an LLC, trust, or other company — a rough proxy for investor ownership.18%
Typical owner tenureThe middle number of years since each unit last changed hands — how long the current owners have been in place.5.1 yrs
Cash purchases (5 yrs)The share of purchases in the last 5 years with no mortgage recorded. High cash share is common in second-home and investor buildings.52%
Avg. loan-to-valueAverage current loan balance against unit value across the building. Low numbers mean owners hold lots of equity — a sign of financial stability.34%
Median owner equityThe middle dollar amount of equity (value minus loans) unit owners hold in this building.$62,184
Median tax billThe middle annual property tax bill among the building's units.$235
Pre-foreclosure noticesUnits with an active pre-foreclosure or foreclosure notice on file.0
Recent SalesThe latest recorded arms-length sales in the building, newest first.
Unit P124Aug 20, 2026$650,000Unit S183Aug 20, 2026$650,000Unit 207Aug 20, 2026$650,000$482/ft²Unit S164May 8, 2026$629,000Unit S170May 8, 2026$629,000Unit P122May 8, 2026$629,000Unit 402May 8, 2026$629,000$501/ft²Unit 304Apr 29, 2026$420,000$445/ft²Unit P120Apr 29, 2026$420,000Unit S185Apr 29, 2026$420,000
Values are TopHap estimates, not appraisals. Sales, ownership and tax figures come from recorded county documents via ATTOM and can lag by several weeks.
Climate Risk
Overall riskThe average of the five hazard scores below, on a 0 to 100 scale. Higher means greater projected risk over the coming decades.33
44
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
1
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
61
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
56
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
3
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.10 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
Scores 0–100; higher = greater projected risk.
Property Facts
Property TypeThe broad category the county puts this property in, such as residential or commercial.Condominium
CountyDane
Lot (acres)The size of the land the home sits on, from county records.0.41
HeatingThe type of heating system in the home.None
PoolWhether the property has a pool, and what kind, such as in-ground.No
Transaction History(3)
Sales and refinances filed with the county for this home. Not every transfer is a normal sale, so check the type before comparing prices.Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.
EMH
Lapham Elementary School
Elementary · Grades PK–2 · 0.5 mi
O'Keeffe Middle SchoolA
Middle · Grades 6–8 · 0.9 mi
East High SchoolA-
High · Grades 9–12 · 1.6 mi
District: Madison Metropolitan School District
Neighborhood · ZIP 53703These are comparison scores, not percentages. 100 equals the national average, so 150 means about 50% above average.
CrimeLocal crime compared with the rest of the country, where 100 is average. It reflects things like population density, income, and how crime gets reported.167
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.78
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.26
Index scale: 100 = US average (tick). Lower is better.
Homes occupiedThe share of homes here that someone lives in. The rest sit empty, including vacation and for-sale homes.96%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.39%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.35%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.8%
PopulationHow many people live in this area.40,725
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.21,930 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$49,802
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$85,168
Average tempThe average temperature here across a full year.46°F
Annual precipHow much rain and melted snow falls here in a typical year.34 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.54%
All UnitsEvery property record the county has at this street address, such as the units in a condo building. Prices shown are our estimates, not asking prices.
808 Williamson St
1,232 ft²
808 Williamson St # P100
808 Williamson St Unit 101
1 bd · 1 ba · 787 ft²
808 Williamson St # P101
808 Williamson St # 102
1 bd · 1 ba · 686 ft²
808 Williamson St # P102
808 Williamson St Unit 103
1 bd · 1 ba · 1,006 ft²
808 Williamson St # P103
808 Williamson St Unit 104
2 bd · 2 ba · 1,176 ft²
808 Williamson St # P104
808 Williamson St # P105
808 Williamson St # P106
808 Williamson St # P107
808 Williamson St # P108
808 Williamson St # P109
808 Williamson St # P110
808 Williamson St # P111
808 Williamson St # P112
808 Williamson St # P113
808 Williamson St # P114
808 Williamson St # P115
808 Williamson St # P116
808 Williamson St # P117
808 Williamson St # P118
808 Williamson St # P119
808 Williamson St # P120
808 Williamson St # P121
808 Williamson St # P122
808 Williamson St # P123
808 Williamson St # P124
808 Williamson St # P125
808 Williamson St # P126
808 Williamson St # P127
808 Williamson St # P128
808 Williamson St # P129
808 Williamson St # P130
808 Williamson St # P131
808 Williamson St # P132
808 Williamson St # P133
808 Williamson St # P134
808 Williamson St # P135
808 Williamson St # P136
808 Williamson St # P137
808 Williamson St # P138
808 Williamson St # P139
808 Williamson St # P140
808 Williamson St # P141
808 Williamson St # P142
808 Williamson St # P143
808 Williamson St # P144
808 Williamson St # S150
808 Williamson St # S151
808 Williamson St # S152
808 Williamson St # S153
808 Williamson St # S154
808 Williamson St # S155
808 Williamson St # S156
808 Williamson St # S157
808 Williamson St # S158
808 Williamson St # S159
808 Williamson St # S160
808 Williamson St # S161
808 Williamson St # S162
808 Williamson St # S164
808 Williamson St # S165
808 Williamson St # S166
808 Williamson St # S167
808 Williamson St # S169
808 Williamson St # S170
808 Williamson St # S172
808 Williamson St # S173
808 Williamson St # S174
808 Williamson St # S175
808 Williamson St # S176
808 Williamson St # S177
808 Williamson St # S178
808 Williamson St # S180
808 Williamson St # S181
808 Williamson St # S183
808 Williamson St # S185
808 Williamson St # S186
808 Williamson St # S187
808 Williamson St # S188
808 Williamson St # S189
808 Williamson St # S190
808 Williamson St # S191
808 Williamson St # S192
808 Williamson St Unit 201
1 bd · 1 ba · 865 ft²
808 Williamson St Unit 202
1 bd · 1 ba · 806 ft²
808 Williamson St Unit 203
1 bd · 1 ba · 748 ft²
808 Williamson St Unit 204
1 bd · 1 ba · 944 ft²
808 Williamson St Unit 205
2 bd · 2 ba · 1,229 ft²
808 Williamson St Unit 206
1 bd · 1 ba · 991 ft²
808 Williamson St # 207
2 bd · 2 ba · 1,349 ft²
808 Williamson St Unit 208
2 bd · 2 ba · 1,258 ft²
808 Williamson St Unit 209
1 bd · 1 ba · 603 ft²
808 Williamson St Unit 210
2 bd · 1 ba · 831 ft²
808 Williamson St Unit 301
1 bd · 1 ba · 865 ft²
808 Williamson St Unit 302
1 bd · 1 ba · 806 ft²
808 Williamson St Unit 303
1 bd · 1 ba · 738 ft²
808 Williamson St Unit 304
1 bd · 1 ba · 944 ft²
808 Williamson St Unit 305
2 bd · 2 ba · 1,229 ft²
808 Williamson St Unit 306
1 bd · 1 ba · 991 ft²
808 Williamson St Unit 307
2 bd · 2 ba · 1,347 ft²
808 Williamson St Unit 308
2 bd · 2 ba · 1,258 ft²
808 Williamson St Unit 309
1 bd · 1 ba · 603 ft²
808 Williamson St Unit 310
2 bd · 1 ba · 831 ft²
808 Williamson St Unit 401
2 bd · 2 ba · 1,059 ft²
808 Williamson St # 402
2 bd · 2 ba · 1,255 ft²
808 Williamson St Unit 403
1 bd · 1 ba · 757 ft²
808 Williamson St Unit 404
1 bd · 1 ba · 850 ft²
808 Williamson St Unit 405
2 bd · 2 ba · 1,229 ft²
808 Williamson St Unit 406
1 bd · 1 ba · 991 ft²
808 Williamson St # 407
2 bd · 2 ba · 1,253 ft²
808 Williamson St Unit 408
2 bd · 2 ba · 1,164 ft²
Data by ATTOM. Valuations are automated estimates, not appraisals. Photos from Google Street View and may not depict the current property state.
About 808 Williamson St
How many units are in 808 Williamson St, Madison, WI?
808 Williamson St, Madison, WI has 114 residential units across 4 floors, built in 2006, according to county assessor records.
What is a unit at 808 Williamson St, Madison, WI worth?
The median TopHap Estimate across the 114 units at 808 Williamson St, Madison, WI is $51,100. That works out to $417 per square foot. Units run from 603 to 1,349 square feet. Estimates are modelled from recorded sales and assessments, not appraisals.
Is 808 Williamson St, Madison, WI expensive for Madison?
Units at 808 Williamson St, Madison, WI carry a median of $417 per square foot, 15% above the Madison median of $362 per square foot.
How often do units sell at 808 Williamson St, Madison, WI?
14 units at 808 Williamson St, Madison, WI sold in the last 12 months, out of 207 recorded arms-length sales all time. That is a turnover rate of 12.3% of the building per year. The median sale over that period was $525K.
Have units at 808 Williamson St, Madison, WI appreciated?
Across 108 repeat sales of the same unit, 808 Williamson St, Madison, WI returned a median 5.2% per year. Because each pair is the same unit bought and sold, the figure is not distorted by which units traded. The median owner held for 4.7 years.
What floor plans does 808 Williamson St, Madison, WI have?
The most common plan at 808 Williamson St, Madison, WI is a 1-bedroom of 991 square feet, repeated 3 times, with a median estimate of $400,844. TopHap identifies 8 recurring plans in the building.
More homes on Williamson St
- 1037 Williamson St # 302$485K1 bd · 1.5 ba · 1,341 ft² · Sold $485K · Sep 2026
- 808 Williamson St # P124$63K0.41 ac · Sold $650K · Aug 2026
- 808 Williamson St # S183$63K0.41 ac · Sold $650K · Aug 2026
- 808 Williamson St # 207$581K2 bd · 2 ba · 1,349 ft² · Sold $650K · Aug 2026
- 1023 Williamson St # 1$345K1 bd · 1 ba · 769 ft² · Sold $345K · Jul 2026
- 808 Williamson St # S164$63K0.41 ac · Sold $629K · May 2026
- 808 Williamson St # S170$63K0.41 ac · Sold $629K · May 2026
- 808 Williamson St # P122$63K0.41 ac · Sold $629K · May 2026
- 808 Williamson St # 402$524K2 bd · 2 ba · 1,255 ft² · Sold $629K · May 2026
- 808 Williamson St # P125$46KCondominium · Sold $410K · Mar 2026
- 808 Williamson St # 406$401K1 bd · 1 ba · 991 ft² · Sold $410K · Mar 2026
- 808 Williamson St # S160$51KCondominium · Sold $410K · Mar 2026
Closest homes
- 808 Williamson St # P140$51K0 ft · Condominium · Sold $400K · Jul 2023
- 808 Williamson St Unit 205$527K0 ft · 2 bd · 2 ba · 1,229 ft² · Sold Apr 2022
- 808 Williamson St$63K0 ft · 0.41 ac · Sold $629K · May 2026
- 808 Williamson St # P112$51K0 ft · Condominium · Sold $296K · Mar 2008
- 802 Williamson St Apt 4$523K0 ft · 2 bd · 2 ba · 1,250 ft² · Sold Feb 2024
- 808 Williamson St Unit 403$318K0 ft · 1 bd · 1 ba · 757 ft² · Sold $190K · Jan 2017
- 808 Williamson St$302K0 ft · 1 bd · 1 ba · 686 ft² · Sold $155K · Dec 2024
- 804 Williamson St0 ft · 1,310 ft² · Sold $400K · Jul 2023
More homes in Madison 53703
- 825 E Mifflin St$340K1 bd · 1 ba · 811 ft² · Sold $350K · Sep 2026
- 1219 Rutledge St$550K2 bd · 1 ba · 1,319 ft² · Sold $540K · Sep 2026
- 932 Spaight St$999K8 bd · 5 ba · 4,426 ft² · Sold $865K · Sep 2026
- 641 E Dayton St$443K2 bd · 2 ba · 1,151 ft² · Sold $443K · Sep 2026
- 333 W Mifflin St$355K1 bd · 1 ba · 801 ft² · Sold $355K · Sep 2026
- 321 W Mifflin St$35K1.14 ac · Sold $355K · Sep 2026
- 403 W Wilson St$1.1M10 bd · 6 ba · 6,110 ft² · Sold $1.1M · Sep 2026
- 123 N Blount St$280K1 bd · 1 ba · 573 ft² · Sold $280K · Sep 2026
- 443 W Dayton St$805K9 bd · 3 ba · 3,486 ft² · Sold $425K · Sep 2026
- 614 W Doty St$325K1 bd · 1 ba · 700 ft² · Sold $325K · Sep 2026
- 618 W Doty St$33K1.3 ac · Sold $325K · Sep 2026
- 618 W Doty St$33K1.3 ac · Sold $325K · Sep 2026
Assigned schools
Explore the area
See this home in context
Open 808 Williamson St on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.
Open in map