Lyons, CO land: flood and parcels
1,052 parcels
20% of Lyons’s 1,052 parcels are in a FEMA flood zone.
County roll 2026 · Map data Oct 26, 2026
- Acres on the roll759
- In a FEMA flood zone20%special flood hazard area
Colorado 2026 taxes: bills go out in January 2027; first half due March 1, 2027, second half June 15, 2027.
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Our map has no zoning layer for Lyons yet. Ask the town's or Boulder County's planning office which zoning applies to a parcel.
Around Lyons
Flood zones and wetlands
Home value trend in Boulder County
Home values in Boulder County rose about 35% over 5 years and held about level in the last year (FHFA, 2025).
Development in Lyons
About 15 acres inside Lyons's limits turned from farmland, forest or other open land into developed land in 2020–2025 (1.6% of its land), and about 30 acres in 2015–2025.
Land in Lyons by useLand use on the county roll
| Land class | Parcels | Share |
|---|---|---|
| Building on record | 919 | 87% |
| Institutional | 101 | 9.6% |
| Other or not coded | 31 | 2.9% |
| Farm and timber | 1 | 0.1% |
1 farm and timber parcels cover 3 acres. County tax roll 2026 (county file Oct 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 Lyons is 0.22 acre (993 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.
Land parcels in LyonsFarm and timber parcels to start with
- 330 Bradford St 3.26 acres
Farm and timber parcels of an acre or more, each with its own page of public roll facts.
Nearby townsTowns around it
Questions about Lyons landAnswers from the public records
How many parcels are in Lyons, CO?
1,052 parcels on the 2026 Boulder County tax roll (county file Oct 2026) inside the Census Bureau's boundary for Lyons, which can differ from its own limits at the edges, covering 759 acres.
How much vacant land is in Lyons, CO?
Boulder County's vacant-land class failed our aerial check (17 of 60 sampled lots were in use or doubtful: park and HOA strips, parking islands, a pond, yards, road strips), so we don't call any parcel here vacant land.
What is the typical lot size in Lyons?
The median parcel is 0.22 acre, from 993 parcels with a recorded size.
How much of Lyons is in a flood zone?
20% 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 Lyons?
0.9% of parcels are a quarter or more wetland on the USFWS National Wetlands Inventory, a mapping guide, not a legal delineation.
What is Lyons zoned?
Our map has no zoning layer for Lyons yet. Ask the town's or Boulder County's planning office which zoning applies to a parcel.
Are there land prices for Lyons?
No land-price range is shown for Lyons yet. We print no land-price range for Boulder County yet. Some parcel cards here carry their own price range.
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.
More in Boulder CountyIts other towns
Sources & methodSources, dates and how these figures are built
Headline figures: source and date
Acres on the roll: County tax roll, 2026 roll, counted on our map built Oct 26, 2026.
In a FEMA flood zone: FEMA National Flood Hazard Layer, as of Oct 10, 2026; counted on our map built Oct 26, 2026.
Property tax due dates
Colorado Revised Statutes 39-10-104.5, 39-5-122 and 39-8-106. Checked Oct 13, 2026.
Flood zones and wetlands: source and date
FEMA flood zone (A or V): FEMA National Flood Hazard Layer, as of Oct 10, 2026; counted on our map built Oct 26, 2026.
Parcels at least 25% wetland: USFWS National Wetlands Inventory, as of Oct 1, 2026; counted on our map built Oct 26, 2026.
Home value trend in Boulder County
This tracks home values, not land values. Land buyers read it as a sign of demand nearby: where homes gain value, builders and buyers follow. A vacant lot can move differently.
How: the change in FHFA's annual county index from 2020 and 2024 to 2025, rounded. The index follows repeat sales and refinance appraisals of the same single-family homes with Fannie Mae or Freddie Mac mortgages. It is in today's dollars, not adjusted for inflation, and FHFA calls these local indexes developmental. Where FHFA's sample is too small it publishes no figure, and none prints here.
Source: FHFA House Price Index, all-transactions, annual county index, 2025, last updated March 31, 2026. Method: Bogin, Doerner and Larson, “Local House Price Dynamics: New Indices and Stylized Facts”, FHFA Working Paper 16-01.
FHFA publishes no index for Lyons itself; this is Boulder County's, which includes it.
Development in Lyons
Counted inside the Census place boundary of Lyons town. Counted from USGS Annual NLCD land cover (2015, 2020 and 2025; 30 m squares on a 240 m grid, so edges are approximate). A square counts when it was forest, shrub, grassland, pasture, cropland or wetland in the start year and developed in 2025 (NLCD's developed classes, from lawns and roads to dense buildings). A satellite land-cover map misses some changes and mislabels a few; read it as a guide.
Source: USGS Annual NLCD Collection 1.2, public domain, DOI 10.5066/P94UXNTS.
What Groundwork can price in Lyons
Price range for a home with its land, or for land (tested on past sales; final check due Jun 2027): 794 parcels.
The card's own words; a card whose range covers a home with its land says “home + land”. Figures are on the card, never on this page.
Land sale prices
We hold this county's recorded deeds, but its file does not mark which sales are arm's-length land sales, so this page prints no land price range yet.
Sources
Parcels: State of Colorado public parcels (OIT) and county assessor layers (2026 roll, county file Oct 2026); flood: FEMA National Flood Hazard Layer (as of Oct 2026); wetlands: USFWS National Wetlands Inventory (as of Oct 2026); town limits: U.S. Census Bureau TIGER/Line places; sales: the county's own file, through Sep 2026; counted on our map built Oct 2026.