Summit County land: flood, zoning and parcels
21,121 parcels
5.8% of Summit County’s 21,121 parcels are in a FEMA flood zone.
County roll 2026 · Map data Oct 26, 2026
- Acres on the roll390,594
- In a FEMA flood zone5.8%special flood hazard area
Property tax calendar
Colorado 2026 taxes: bills go out in January 2027; first half due March 1, 2027, second half June 15, 2027.
- First half
- March 1, 2027On the 2026 values; or pay the whole bill by April 30, 2027
- Second half
- June 15, 2027A late half accrues 1% interest a month
- Value protests
- To the assessor by June 8 (next working day when it falls on a weekend)Then to the county board of equalization
Free account: 25 parcel cards a day on the map, with watches and a saved search. Get started free
Around Summit County
Towns and census places in Summit County
- Breckenridge4,041 parcels
- Silverthorne2,943 parcels
- Frisco1,980 parcels
- Keystone1,023 parcels
- Blue River901 parcels
- Dillon569 parcels
- Copper Mountain299 parcels
- Heeney181 parcels
Flood zones and wetlands
Recorded flood claims in Summit County
Fewer than 10 insured flood claims were recorded in Summit County since 1978.
Land in Summit County by useLand use on the county roll
| Land class | Parcels | Share |
|---|---|---|
| Building on record | 17,292 | 82% |
| Institutional | 2,171 | 10% |
| Other or not coded | 1,469 | 7% |
| Farm and timber | 189 | 0.9% |
189 farm and timber parcels cover 22,820 acres. County tax roll 2026 (county file Mar 2026); land class read from the roll's land-use and building fields.
Typical lot sizeThe typical lot, from the roll
The median parcel in Summit County is 0.34 acre (21,092 parcels with a size).
Acres from the county roll, or from the parcel's own outline where the roll's figure is off by more than three times. Condominium units that share one point (each carrying the whole complex's acres) are left out of the lot sizes.
How Summit County is zonedThe most common districts
| Zoning district | Parcels | Share of zoned |
|---|---|---|
| Breckenridge | 4,042 | 19% |
| Silverthorne | 2,945 | 14% |
| R-2 | 2,089 | 9.9% |
| Frisco | 1,979 | 9.4% |
| Keystone | 1,033 | 4.9% |
| R-1 | 1,004 | 4.8% |
| Blue River | 901 | 4.3% |
| Dillon | 568 | 2.7% |
Zoning is on file for 100% of parcels in Summit County, across 133 districts. A district shown by its code alone has no published name on our map. The town or county zoning office has the final word on any parcel.
Land parcels in Summit CountyFarm and timber parcels to start with
- 105.0 acres of farm and timber land
- 99.7 acres of farm and timber land
- 850 Cataract Creek Rd (CR 1725) 89.5 acres
- 3120 Johnson Rd (CR 2401) 84.4 acres
- 78.9 acres of farm and timber land
- 77.8 acres of farm and timber land
- 77.5 acres of farm and timber land
- 2443 Upper Mesa Trl (CR 1822) 74.5 acres
Farm and timber parcels of an acre or more, each with its own page of public roll facts.
Questions about Summit County landAnswers from the public records
How many parcels are in Summit County, CO?
21,121 parcels on the 2026 Summit County tax roll (county file Mar 2026), covering 390,594 acres.
How much vacant land is in Summit County, CO?
Summit County's vacant-land class failed our aerial check (13 of 60 sampled lots were in use or doubtful: yards with sheds, a resort open-space tract, golf and highway strips, an excavation), so we don't call any parcel here vacant land.
What is the typical lot size in Summit County?
The median parcel is 0.34 acre, from 21,092 parcels with a recorded size.
How much of Summit County is in a flood zone?
5.8% of parcels are in a FEMA special flood hazard area (National Flood Hazard Layer, as of Oct 2026). Check each parcel's own flood line before you buy.
Are there wetlands in Summit County?
5.2% of parcels are a quarter or more wetland on the USFWS National Wetlands Inventory, a mapping guide, not a legal delineation.
What is Summit County zoned?
Zoning is on file for 100% of parcels. The most common districts: Breckenridge, Silverthorne, R-2.
Are there land prices for Summit County?
No land-price range is shown for Summit County yet. We have no sale-price file for Summit County yet.
Where does this data come from?
Parcels: State of Colorado public parcels (OIT) and county assessor layers. Flood: FEMA National Flood Hazard Layer. Wetlands: USFWS National Wetlands Inventory. Towns: U.S. Census places. Every figure is counted from those files on our map.
Sources & methodSources, dates and how these figures are built
Property tax due dates
Colorado Revised Statutes 39-10-104.5, 39-5-122 and 39-8-106. Checked Oct 13, 2026.
Recorded flood claims in Summit County
FEMA counts claims on buildings with NFIP flood insurance, so land without an insured building never shows here. Claims counted from 1978 to Sep 2026.
Source: OpenFEMA NFIP Redacted Claims v3, as of Sep 2026.
Land sale prices
We have no sale-price file for this county yet, and Colorado has no statewide sale-price file.
Sources
Parcels: State of Colorado public parcels (OIT) and county assessor layers (2026 roll, county file Mar 2026); flood: FEMA National Flood Hazard Layer (as of Oct 2026); wetlands: USFWS National Wetlands Inventory (as of Oct 2026); counted on our map built Oct 2026.
This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data.