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Boulder 80305 is in Boulder County, CO, part of the Denver Metro. The typical home value in Boulder 80305 is $961,927 (Zillow Home Value Index, September 2026), up 0.9% from a year earlier. Homes that sold went under contract in a median 39 days, and 25% of listings took a price cut (Redfin Data Center, period ending Sep 30, 2026). On Lotvox's market-leverage reading of that data, with 2.6 months of supply, neither buyers nor sellers hold a clear edge. Lotvox scores all 6,277 homes in 80305 with county records every night with its Turnover Index; in a held-out test, the top fifth of scored homes accounted for 26.5% of the 34 sales that followed, against 20% by chance (scored Oct 25, 2026). Across Boulder County's 14 ZIPs with a Zillow value, the middle one is $708,304, so 80305 sits 36% above the county middle. Typical rent is $2,837 a month (Zillow Observed Rent Index, September 2026). Lotvox holds county assessor records for 6,870 properties in 80305.
Headline value data through September 2026. Each source below carries its own date.
Is 80305 a buyer's or seller's market?
By Lotvox's leverage reading of Redfin data through Sep 30, 2026, 80305 is a balanced market. Homes went under contract in a median 39 days with 2.6 months of supply.
What do homes in 80305 sell for?
The typical home value in 80305 is $961,927 (Zillow Home Value Index, September 2026), up 0.9% in a year. County records put the median at about $304 per square foot (computed Jul 26, 2026).
Who is likely to sell in 80305?
Lotvox's Turnover Index ranks every home in 80305 by how likely it is to sell, from county deed and parcel records, scored nightly. In a held-out test its top fifth held 26.5% of later sales, against 20% by chance.
How does 80305 compare to Boulder County?
80305's typical value of $961,927 compares with a middle value of $708,304 across Boulder County's 14 ZIPs. Both are Zillow Home Value Index figures for September 2026.
Where does this 80305 data come from?
Values and rents come from Zillow's research data, sales pace from the Redfin Data Center, and property counts and turnover from county assessor and deed records. Each number on this page carries its own date, and the method is published at lotvox.com/methodology.
Cite as: Lotvox ZIP market record, 80305 Boulder, CO, data through September 2026, https://lotvox.com/denver/zip/80305
Listings Flow Ladder — 80305
Faucet, basin and drain — new listings in, active inventory, closed sales out.as of Sep 30, 2026
the basin is fillingnet 3 listings/mo
Faucet — new listings
23/mo
97% of normal (24) · normal· baseline thin
Basin — active listings
52
108% of normal (48) · low· baseline thin
Months of supply
2.6 mo
derived — not published at this grain
Drain — closed sales
20/mo
107% of normal (19)· baseline thin
Net — faucet minus drain
+3/mo
filling
Reading
current
as of 2026-09-30
Compare against:2015-01-01 to 2019-12-31 · 5 same-month points
How plugged is the drain? Two definitions, both ours, deliberately not reconciled.
0%Absorption vs its own normal— 1 - (closed sales / active listings) / same-month median of that ratio
0%Closed sales vs its own normal— 1 - closed sales per month / same-month median closed sales per month
Closed sales over 24 months — two different numbers, deliberately not merged.
7/mofall in the monthly rate (25%)— peak 27/mo (2026-08-31) to 20/mo now
45transactions that did not happen— summed monthly shortfall vs the same-month normal, over 20 months below it (vs 2015-19 (COVID excluded))
rate_drop_from_peak is a change in the monthly rate; cumulative_shortfall_vs_normal counts transactions not transacted. They are different quantities and are not interchangeable.
2026-09-30
Redfin market data (county + ZIP), via Lotvox. As of 2026-09-30. Normal = same-month median of monthly rates, minimum 3 same-month points. Source window 3 months (flows shown per month). months_of_supply is not published at this grain (0 non-null rows measured); derived here as active listings / closed sales per month. A fresher supply-only read (16 new, 48 active, 2026-09-01, Realtor.com inventory (county + ZIP), via Lotvox) is available but is NOT used in the net — that source publishes no closed sales, so subtracting across it would mix two vintages.
Should you buy here?
buyer-timing lens
17affordability /100
Buyer leverage is balanced; weigh payment burden and the 3-lens valuation before bidding.
Payment burden
52.5%
severe
Days on market
39
daily
Price cuts
25.0%
of active
Valuation
+4.1%
vs assessor
Days on market and price cuts: Redfin Data Center, rolling 90 days.
Rent: Zillow Observed Rent Index (ZORI). Ownership cost: Zillow Home Value Index (ZHVI), 20% down, 30-year loan at the current mortgage rate, plus 1.2% of the price a year.
Rent to price — the investor's question first
28.3×
price to annual rent
Lower is friendlier to a buy-to-let case. This is a ratio of published medians, not a yield on any particular property.
Price: Zillow Home Value Index (ZHVI). Annual rent: 12 months of Zillow Observed Rent Index (ZORI).
Verdict grades housing conditions; buyer-timing, investor cash-flow, supply-tightness and county macro scores answer different questions — each in its own section.
Buyer / seller
buyer-timing lens
Balanced Market
Needs 42.9% correction for affordability
DOM: 60d (rising) · Market Dynamics rolling median · hourly
Score Components
Payment Burden (25%)100
Valuation Gap (25%)10
Supply & Demand (20%)40
Buy vs Rent (15%)100
Cancellation Rate (10%)0
Days on Market (5%)60
Balanced market in 80305. List price is roughly fair — focus on condition and value. Payment burden: 50.1% of median income. A 30% price correction needed to reach 30% affordability threshold. Median days on market: 60. Renting is approximately 135% cheaper than buying (price-to-rent ratio: 28.2).
Balanced market conditions. Prices roughly aligned with fundamentals — similar to stable periods in 2014-2015.
COOLINGBALANCED
Market is cooling with expanding inventory. Conditions are balanced between buyers and sellers.
Turnover Index · Live in this ZIPBacktest: 26.5% of later sellers were already in the top 20% (random = 20%, 34 held-out sales) · 6,277 parcels scored nightly
Median price: Zillow Home Value Index (ZHVI). Median rent: Zillow Observed Rent Index (ZORI). Days on market and active listings: Redfin Data Center, rolling 90 days.
Valuation
3 lenses, different anchors
vs assessor
+4.1%
Market vs assessed value — a tax-roll lag, not a deal signal.
Avg assessor$1,001,300
county CAMA · properties_v
vs income
—
Fair-value model not available for this market.
fair_value_scores · 10-state coverage
vs county comps
+62.3%
County-wide market — the widest, slowest signal.
Boulder+62.3%
Lotvox comps · mv_valuation_gap
Read together: Above county comps but sustainable on local incomes.
in 5,799 · out 7,485 · Boulder County, CO (parent county of this ZIP)
active inventory
as of 2026-07-01 · IRS SOI county-to-county migration flows 2022-2023 + Redfin inventory history
Price bands
mix-shift
Price Bands — the median behind the median
A single median rises whenever expensive homes become a bigger share of what sells, even if no tier got more expensive. These are the tiers underneath it, computed from recorded arms-length deed transactions in Boulder.
Aggregate median +1.9% YoY in Boulder, CO (county), but the under-$500k tier is -1.2% — the rise is mix shift, not appreciation. Over the same year the under-$500k share of sales moved from 22.2% to 21.6% (-0.6pp) and the $1M+ share from 28.2% to 29.2% (+1.1pp).
Current tiers · 12 months to Aug 25floor 10 sales/tier
2 tiers had too few sales in this ZIP and are shown at county or metro level — see the stamp on each row.
Tier
Median
$/sqft
Sales
Share
Source
Under $250k
$104k
$240
100
—
COUNTY · Boulder, CO
$250k–$500k
$415k
$409
737
—
COUNTY · Boulder, CO
$500k–$750k
$681k
$660
22
12.3%
ZIP
$750k–$1M
$875k
$731
65
36.3%
ZIP
$1M–$1.5M
$1.17M
$936
52
29.1%
ZIP
$1.5M–$2M
$1.68M
$1062
20
11.2%
ZIP
$2M+
$2.49M
$1173
17
9.5%
ZIP
All sales (the headline median)
$1000k
$798
179
100%
ZIP
ZIP-level history was too thin to draw the tiers; served at county level (Boulder, CO), by quarter.
Share of sales by tier (quarterly)
If the upper tiers widen over time, the headline median rises on composition alone.
Under $250k
$250k–$500k
$500k–$750k
$750k–$1M
$1M–$1.5M
$1.5M–$2M
$2M+
Median within each tier, against the headline median (quarterly)
The blue line is the single number NAR-style reporting quotes. The gold lines are what each tier actually did. Log scale — the tiers span an order of magnitude, and on a log axis equal slopes mean equal percentage moves, which is the comparison being made.
Under $250k
$250k–$500k
$500k–$750k
$750k–$1M
$1M–$1.5M
$1.5M–$2M
$2M+
All sales (headline)
National context — not local
NAR's aggregate existing-home median for the United States and the West census region. This is the figure the tiers above are a check on. It is national/regional and says nothing about 80305.
United States
West
Copyright, National Association of Realtors. Reprinted with permission. Retrieved from FRED, Federal Reserve Bank of St. Louis. FRED publishes a rolling 13-month window for these series.
Tiers computed from Lotvox parcel and deed substrate through Aug 25 (10 later months withheld as partially loaded). Sample floor 10 sales per tier; below it a figure is drawn from the county or metro and labelled, or left blank. Multi-parcel bulk deeds and duplicate records are excluded.
ZIP score grades housing; county score adds macro distress (jobs, debt, poverty). They answer different questions.
ZIP 80305→Boulder County, COPop: 329,996
12-Month Direction
-10Moderate Deterioration
Confidence
100%
DeterioratingStableImproving
BuildersLens Market Intelligence
Market Score
37· Weak
Market Score grades housing-market conditions (affordability, valuation, supply). The county Healthy/Moderate/Distressed badge measures economic distress (jobs, debt, poverty) — the two can read differently.
Payment Burden
52.5%
severe
Source: Freddie Mac PMMS (FRED MORTGAGE30US) 7.32% · Zillow ZHVI · Census income · Updated 2026-10-22
Price-to-rent
28.3x
favors renting
Source: Zillow ZHVI ÷ (Zillow ZORI × 12)
Valuation9
+62.3%
overvalued
Source: Lotvox comps · Updated 2026-05-15
Supply/Demand
2.6 mo
seller's market
Source: Redfin Data Center (ZIP): inventory ÷ monthly homes sold · Updated 2026-09-30
Insurance Risk
38/100
moderate
Source: FEMA/NFIP · Updated 2026-04
County distress indicators
ECONOMIC INDICATORS
Economic indicators are mixed relative to comparable U.S. counties.
Unemployment Rate
4.6%
CO 3.8%US 4.4%
Near national averages
Source: BLS LAUS · 2026-0855d ago
Poverty Rate
11.0%
CO 9.4%US 12.6%
Near national averages
Median Household Income
$102,772
CO $94,510US $82,006
Higher than most U.S. counties
Cost of Living (RPP)
112.5
CO 111.8US 100.3
Higher than many comparable counties
Home Value (ZHVI)$727,957
County data: Zillow Home Value Index (ZHVI), BLS, Census ACS, CDC, FBI UCR, Federal Reserve, USDA
Typical home value: Zillow Home Value Index (ZHVI); change is the 12-month change.
Owner stock, age of householder
Tenure by age of householder (ACS B25007) is not published below county. Any ZIP figure here is DERIVED from the county's age-specific owner rates applied to this ZIP's own age structure — never read directly.
Derived — this ZIP
10.8% in 2023
of owner-occupied homes have a householder 75 or older
