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CondominiumResidential

1850 Folsom St

BOULDER, CO 80302
25 ft²
Lot SizeThe size of the land the home sits on, from county records.
1971
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
Built 197111 floors119 units675–1,904 ft²
$58M
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.
$460K
Median unit valueThe middle unit value in this building by our estimate: half the units are worth more, half less.
$430
Median $/ft²The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.

-25.2%vs the Boulder ZIP median sale $/ft² ($574)

Sales Performance

$453K
Median sale (12 mo)The middle sale price among this building's units that sold in the last 12 months, from recorded deeds.
+0.6%
1-yr changeHow the building's median sale price over the last 12 months compares with the 12 months before that.
6
Sales (12 mo)Units in this building that sold in the last 12 months, from recorded arms-length deeds.
5.0%
Turnover (12 mo)The share of units that changed hands in the last 12 months. Around 4–6% a year is typical; much higher can signal investor churn or a wave of exits.
This building's own appreciationThe building's own appreciation: for every unit that sold twice (held over a year), we compute its yearly price change between the two sales and take the middle value. This is the cleanest read on how this specific building performs, because it compares each unit to itself.
+4.8%per yeartypical hold 6.2 yrsfrom 82 same-unit resales
Median sale price (yearly, all time)Every recorded arms-length sale in the building since records begin, grouped by year: the bars count sales and the line tracks the median price paid.MedianSales
20022005200920122016201920232026
Sale price per ft² (yearly, all time)The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.$/ft²
20022005200920122016201920232026

186 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.
$258K$469K$679K$890K675 ft²921 ft²1,167 ft²1,412 ft²1,658 ft²1,904 ft²
1 bd2 bd3 bd
1 bed
48 units
2 bed
62 units
3 bed
9 units
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.
2 bd · 1.5 ba · 1,357 ft²
35 units
1 bd · 1 ba · 801 ft²
26 units
1 bd · 1 ba · 682 ft²
11 units
2 bd · 1.5 ba · 1,364 ft²
10 units
1 bd · 1 ba · 993 ft²
9 units
2 bd · 1 ba · 1,277 ft²
5 units
3 bd · 1 ba · 1,904 ft²
4 units
3 bd · 2 ba · 1,904 ft²
4 units
2 bd · 1.8 ba · 1,277 ft²
3 units
2 bd · 3.3 ba · 1,357 ft²
2 units
One-off layouts
10 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.

$258K–$336K
6 units
$348K–$415K
37 units
$432K–$492K
30 units
$495K–$573K
20 units
$574K–$650K
18 units
$660K–$674K
4 units
$750K–$783K
3 units
$890K–$890K
1 unit

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.

Floors 2–3
$423/ft²
Floors 4–5
$428/ft²
Floors 6–7
$427/ft²
Floors 8–9
$422/ft²
Floors 10–11
$443/ft²
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 ·02
$548/ft²
Line ·04
$513/ft²
Line ·03
$501/ft²
Line ·12
$485/ft²
Line ·01
$437/ft²
Line ·05
$427/ft²
Line ·08
$394/ft²
Line ·06
$379/ft²
Line ·11
$377/ft²
Line ·10
$377/ft²
Line ·07
$374/ft²
Line ·09
$342/ft²

Ownership & Financing

Owner-occupiedThe share of units where the owner lives in the unit, per county records. The rest are second homes or rentals.34%
Company-ownedUnits owned through an LLC, trust, or other company — a rough proxy for investor ownership.33%
Typical owner tenureThe middle number of years since each unit last changed hands — how long the current owners have been in place.10.6 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.62%
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.26%
Median owner equityThe middle dollar amount of equity (value minus loans) unit owners hold in this building.$518,057
Median tax billThe middle annual property tax bill among the building's units.$3,297
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 1005Sep 14, 2026$665,000Unit 512Aug 19, 2026$365,000Unit 212Aug 12, 2026$333,000Unit 503May 27, 2026$375,000Unit 1102Feb 2, 2026$555,000Unit 1007Jan 22, 2026$530,000Unit 812Sep 8, 2025$375,000Unit 1108Sep 3, 2025$650,000Unit 611Jul 24, 2025$525,000Unit 1012May 28, 2025$375,000

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

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.27 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.34%
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.1 percent flood zone

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
StyleThe architectural style of the home, such as ranch or colonial.Condo/Apartment
CountyBOULDER
Lot (acres)The size of the land the home sits on, from county records.0.00
ConstructionThe main material the home's frame and walls are built from.Masonry/Concrete Masonry Units (Cmus)
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
CoolingThe type of cooling or air conditioning in the home.Central
GarageWhether the property has a garage, and details like whether it is attached to the home.Carport (Unspecified)
PoolWhether the property has a pool, and what kind, such as in-ground.No

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

E
Whittier International Elementary SchoolB
Elementary · Grades KG–5 · 0.4 mi
H
Boulder High SchoolC
High · Grades 9–12 · 0.7 mi
M
Casey Middle SchoolC+
Middle · Grades 6–8 · 1.0 mi

District: Boulder Valley School District Re-2

Neighborhood · ZIP 80302These 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.134
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.92
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.46

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.91%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.37%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.27%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.1%
PopulationHow many people live in this area.31,245
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.324 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$82,366
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$127,191
Average tempThe average temperature here across a full year.45°F
Annual precipHow much rain and melted snow falls here in a typical year.22 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.69%

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.

1850 Folsom St # 201
1 bd · 1 ba · 993 ft²
$450K
1850 Folsom St # 202
1 bd · 1 ba · 801 ft²
$449K
1850 Folsom St # 203
1 bd · 1 ba · 801 ft²
$444K
1850 Folsom St # 204
1 bd · 1 ba · 801 ft²
$450K
1850 Folsom St # 205
2 bd · 2 ba · 1,277 ft²
$490K
1850 Folsom St # 206
2 bd · 1.5 ba · 1,357 ft²
$533K
1850 Folsom St # 207
2 bd · 1.5 ba · 1,357 ft²
$414K
1850 Folsom St # 208
2 bd · 1.5 ba · 1,364 ft²
$393K
1850 Folsom St # 209
3 bd · 1 ba · 1,904 ft²
$783K
1850 Folsom St # 210
2 bd · 1.5 ba · 1,357 ft²
$588K
1850 Folsom St # 211
2 bd · 1.5 ba · 1,357 ft²
$588K
1850 Folsom St # 212
1 bd · 1 ba · 682 ft²
$330K
1850 Folsom St # 301
1 bd · 1 ba · 993 ft²
$391K
1850 Folsom St # 302
1 bd · 1 ba · 801 ft²
$412K
1850 Folsom St # 303
1 bd · 1 ba · 801 ft²
$382K
1850 Folsom St # 304
1 bd · 1 ba · 801 ft²
$444K
1850 Folsom St # 305
2 bd · 2 ba · 1,267 ft²
$640K
1850 Folsom St # 306
2 bd · 1.5 ba · 1,357 ft²
$480K
1850 Folsom St # 307
2 bd · 1.5 ba · 1,357 ft²
$450K
1850 Folsom St # 308
2 bd · 1.5 ba · 1,364 ft²
$457K
1850 Folsom St # 309
3 bd · 2 ba · 1,904 ft²
$674K
1850 Folsom St # 310
2 bd · 1.5 ba · 1,357 ft²
$403K
1850 Folsom St # 311
2 bd · 1.5 ba · 1,357 ft²
$534K
1850 Folsom St # 312
1 bd · 1 ba · 682 ft²
$258K
1850 Folsom St # 401
1 bd · 1 ba · 993 ft²
$405K
1850 Folsom St # 402
1 bd · 1 ba · 801 ft²
$480K
1850 Folsom St # 403
1 bd · 1 ba · 801 ft²
$390K
1850 Folsom St # 404
1 bd · 1 ba · 801 ft²
$440K
1850 Folsom St # 405
2 bd · 1 ba · 1,277 ft²
$411K
1850 Folsom St # 406
2 bd · 1.5 ba · 1,357 ft²
$479K
1850 Folsom St # 407
2 bd · 1.5 ba · 1,357 ft²
$571K
1850 Folsom St # 408
2 bd · 1.5 ba · 1,364 ft²
$450K
1850 Folsom St # 409
3 bd · 2 ba · 1,904 ft²
$594K
1850 Folsom St # 410
2 bd · 1.5 ba · 1,357 ft²
$573K
1850 Folsom St # 411
2 bd · 1.5 ba · 1,357 ft²
$479K
1850 Folsom St # 412
1 bd · 1 ba · 682 ft²
$297K
1850 Folsom St # 501
1 bd · 1 ba · 993 ft²
$452K
1850 Folsom St # 502
1 bd · 1 ba · 682 ft²
$381K
1850 Folsom St # 503
1 bd · 1 ba · 801 ft²
$361K
1850 Folsom St # 504
1 bd · 1 ba · 801 ft²
$382K
1850 Folsom St # 505
2 bd · 1.8 ba · 1,277 ft²
$491K
1850 Folsom St # 506
2 bd · 1.5 ba · 1,357 ft²
$551K
1850 Folsom St # 507
2 bd · 1.5 ba · 1,357 ft²
$613K
1850 Folsom St # 508
2 bd · 1.5 ba · 1,364 ft²
$644K
1850 Folsom St # 509
3 bd · 1 ba · 1,904 ft²
$608K
1850 Folsom St # 510
2 bd · 1 ba · 1,357 ft²
$509K
1850 Folsom St # 511
2 bd · 1.5 ba · 1,357 ft²
$527K
1850 Folsom St # 512
1 bd · 1 ba · 682 ft²
$362K
1850 Folsom St # 601
1 bd · 1 ba · 993 ft²
$450K
1850 Folsom St # 602
1 bd · 1 ba · 801 ft²
$372K
1850 Folsom St # 603
1 bd · 1 ba · 801 ft²
$358K
1850 Folsom St # 604
1 bd · 1 ba · 801 ft²
$395K
1850 Folsom St # 605
2 bd · 1 ba · 1,277 ft²
$411K
1850 Folsom St # 606
2 bd · 1.5 ba · 1,357 ft²
$497K
1850 Folsom St # 607
2 bd · 1.5 ba · 1,357 ft²
$481K
1850 Folsom St # 608
2 bd · 1.5 ba · 1,364 ft²
$503K
1850 Folsom St # 609
3 bd · 2 ba · 1,904 ft²
$890K
1850 Folsom St # 610
2 bd · 1.5 ba · 1,357 ft²
$570K
1850 Folsom St # 611
2 bd · 1.5 ba · 1,357 ft²
$462K
1850 Folsom St # 612
1 bd · 1 ba · 682 ft²
$312K
1850 Folsom St # 701
1 bd · 1 ba · 993 ft²
$456K
1850 Folsom St # 702
1 bd · 1 ba · 801 ft²
$382K
1850 Folsom St # 703
1 bd · 1 ba · 675 ft²
$351K
1850 Folsom St # 704
1 bd · 1 ba · 801 ft²
$388K
1850 Folsom St # 705
2 bd · 1 ba · 1,277 ft²
$620K
1850 Folsom St # 706
2 bd · 1.5 ba · 1,357 ft²
$595K
1850 Folsom St # 707
2 bd · 1.5 ba · 1,357 ft²
$579K
1850 Folsom St # 708
2 bd · 1.5 ba · 1,364 ft²
$590K
1850 Folsom St # 709
3 bd · 1 ba · 1,904 ft²
$415K
1850 Folsom St # 710
2 bd · 1.5 ba · 1,357 ft²
$576K
1850 Folsom St # 711
2 bd · 1.5 ba · 1,357 ft²
$501K
1850 Folsom St # 712
1 bd · 1 ba · 682 ft²
$381K
1850 Folsom St # 801
1 bd · 1 ba · 993 ft²
$458K
1850 Folsom St # 802
1 bd · 1 ba · 801 ft²
$432K
1850 Folsom St # 803
1 bd · 1 ba · 801 ft²
$407K
1850 Folsom St # 804
1 bd · 1 ba · 801 ft²
$382K
1850 Folsom St # 805
2 bd · 1 ba · 1,277 ft²
$578K
1850 Folsom St # 806
2 bd · 1.5 ba · 1,357 ft²
$403K
1850 Folsom St # 807
2 bd · 1.5 ba · 1,357 ft²
$574K
1850 Folsom St # 808
2 bd · 1.5 ba · 1,364 ft²
$495K
1850 Folsom St # 809
3 bd · 1 ba · 1,904 ft²
$415K
1850 Folsom St # 810
2 bd · 1.5 ba · 1,357 ft²
$403K
1850 Folsom St # 811
2 bd · 1.5 ba · 1,357 ft²
$451K
1850 Folsom St # 812
1 bd · 1 ba · 682 ft²
$336K
1850 Folsom St # 901
2 bd · 2 ba · 1,794 ft²
$771K
1850 Folsom St # 903
1 bd · 1 ba · 801 ft²
$466K
1850 Folsom St # 904
1 bd · 1 ba · 801 ft²
$366K
1850 Folsom St # 905
2 bd · 1 ba · 1,277 ft²
$660K
1850 Folsom St # 906
2 bd · 1.5 ba · 1,203 ft²
$571K
1850 Folsom St # 907
2 bd · 1.5 ba · 1,357 ft²
$415K
1850 Folsom St # 908
2 bd · 1.5 ba · 1,364 ft²
$639K
1850 Folsom St # 909
3 bd · 2 ba · 1,904 ft²
$750K
1850 Folsom St # 910
2 bd · 1.5 ba · 1,357 ft²
$415K
1850 Folsom St # 911
2 bd · 3.3 ba · 1,357 ft²
$532K
1850 Folsom St # 912
1 bd · 1 ba · 682 ft²
$359K
1850 Folsom St # 1001
1 bd · 1 ba · 993 ft²
$381K
1850 Folsom St # 1002
1 bd · 1 ba · 801 ft²
$460K
1850 Folsom St # 1003
1 bd · 1 ba · 801 ft²
$410K
1850 Folsom St # 1004
1 bd · 1 ba · 801 ft²
$415K
1850 Folsom St # 1005
2 bd · 1.8 ba · 1,277 ft²
$665K
1850 Folsom St # 1006
2 bd · 1.5 ba · 1,357 ft²
$415K
1850 Folsom St # 1007
2 bd · 1.5 ba · 1,357 ft²
$492K
1850 Folsom St # 1008
2 bd · 1.5 ba · 1,364 ft²
$628K
1850 Folsom St # 1009
2 bd · 1.8 ba · 1,736 ft²
$673K
1850 Folsom St # 1010
2 bd · 1.8 ba · 1,357 ft²
$525K
1850 Folsom St # 1011
2 bd · 1.5 ba · 1,357 ft²
$542K
1850 Folsom St # 1012
1 bd · 1 ba · 682 ft²
$324K
1850 Folsom St # 1101
1 bd · 1 ba · 993 ft²
$464K
1850 Folsom St # 1102
1 bd · 1 ba · 801 ft²
$520K
1850 Folsom St # 1103
1 bd · 1 ba · 801 ft²
$383K
1850 Folsom St # 1104
1 bd · 1.8 ba · 801 ft²
$448K
1850 Folsom St # 1105
2 bd · 1.8 ba · 1,277 ft²
$484K
1850 Folsom St # 1106
2 bd · 1.5 ba · 1,357 ft²
$548K
1850 Folsom St # 1107
2 bd · 1.5 ba · 1,357 ft²
$485K
1850 Folsom St # 1108
2 bd · 1.5 ba · 1,364 ft²
$582K
1850 Folsom St # 1109
3 bd · 3.5 ba · 1,904 ft²
$650K
1850 Folsom St # 1110
2 bd · 3.3 ba · 1,357 ft²
$550K
1850 Folsom St # 1111
2 bd · 1.5 ba · 1,357 ft²
$506K
1850 Folsom St # 1112
1 bd · 1 ba · 682 ft²
$348K

Data by ATTOM. Valuations are automated estimates, not appraisals. Photos from Google Street View and may not depict the current property state.

About 1850 Folsom St

How many units are in 1850 Folsom St, Boulder, CO?

1850 Folsom St, Boulder, CO has 119 residential units across 11 floors, built in 1971, according to county assessor records.

What is a unit at 1850 Folsom St, Boulder, CO worth?

The median TopHap Estimate across the 119 units at 1850 Folsom St, Boulder, CO is $459,708. That works out to $430 per square foot. Units run from 675 to 1,904 square feet. Estimates are modelled from recorded sales and assessments, not appraisals.

Is 1850 Folsom St, Boulder, CO expensive for Boulder?

Units at 1850 Folsom St, Boulder, CO carry a median of $430 per square foot, 25% below the Boulder median of $574 per square foot.

How often do units sell at 1850 Folsom St, Boulder, CO?

6 units at 1850 Folsom St, Boulder, CO sold in the last 12 months, out of 186 recorded arms-length sales all time. That is a turnover rate of 5.0% of the building per year. The median sale over that period was $453K.

Have units at 1850 Folsom St, Boulder, CO appreciated?

Across 82 repeat sales of the same unit, 1850 Folsom St, Boulder, CO returned a median 4.8% 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 6.2 years.

What floor plans does 1850 Folsom St, Boulder, CO have?

The most common plan at 1850 Folsom St, Boulder, CO is a 2-bedroom of 1,357 square feet, repeated 35 times, with a median estimate of $501,149. TopHap identifies 10 recurring plans in the building.

More homes on Folsom St

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Assigned schools

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