What Larkspur Well Records Tell You Before You Buy

How deep are wells around Larkspur?

How much water do wells make near Larkspur?

Larkspur Well Depth Varies Across the Denver Basin

Depth is the first number to carry into a drilling conversation. Among local wells reporting total depth, the median is 418 feet. The middle half extends from 205 to 685 feet, so a bid near the median may be reasonable for one property but not another. The range is wide: 33% of wells are between 300 and 600 feet, and another 33% are deeper than 600 feet.

Only 14% are under 100 feet, while 20% fall from 100 to 300 feet. The deepest recorded well is 2,813 feet. Permits commonly identify Denver Basin aquifers, with 84% of named aquifer records in that basin. Fractured bedrock is also named often, which can make depth and production harder to predict.

What Larkspur Wells Commonly Produce

Of the local records that report a pump yield, the median is 11.0 gallons per minute, and the middle half is 9.0 to 15.0 gallons per minute. That is a workable planning range for many household wells, but it is not the same as guaranteed daily water availability. Storage, pump sizing and the well’s permitted use still matter.

The yield distribution is relatively favorable: 65% report 5 to 15 gallons per minute, and 29% report more than 15 gallons per minute. Another 6% fall from 1 to 5 gallons per minute. No reported wells are under 1 gallon per minute. Ask for the well construction report and pump test, not just a seller’s verbal estimate.

Water Levels Around Larkspur Do Not Show a Simple Decline

Only 99 wells report a static water level, so this part of the record is thinner than the depth and yield data. The median depth to water is 395 feet, with the middle half from 98 to 539 feet. A buyer should treat that spread as a warning that nearby wells can have very different pumping and installation requirements.

The decade series does not support a simple claim that the water table is steadily dropping. Median measured depth to water was 157 feet in the 1980s, 525 feet in the 1990s, 420 feet in the 2010s and 380 feet in the 2020s. Different locations, aquifers and measurement conditions may explain the movement, so use the nearest comparable wells when reviewing a property.

Larkspur’s Permit History Shows Long-Term Drilling Activity

Colorado DWR records contain 1,202 permitted wells within the Larkspur search area. Of those, 612 are recorded as constructed, 698 report a total depth and 419 report a pump yield. The records include permits from the 1950s through the newest permit year, 2025.

Permit activity was highest in the 1990s, with 240 permits, followed by 204 in the 1980s, 179 in the 2000s and 132 in the 2010s. The most active names in these records are Hier Drilling Co Inc, listed with Bruce A. Hier, Hier Drilling Co. with Peter J. Hier, and Fletcher Drilling with Thomas Fletcher. This is a record of past work, not a recommendation or guarantee of current availability.

A Median-Depth Larkspur Well Can Cost More Than the Hole

The local cost model uses Denver Basin sedimentary bedrock and a typical drilling rate of $50 to $70 per foot. At the local median depth of 418 feet, the drilled hole is modeled at about $20,900 to $29,300. That is only the drilling portion.

A finished well, including the pump, tank, trenching and electrical, is modeled at about $26,900 to $41,300. A quote should state the assumed depth, casing and grout, pump system, water storage, trench length, electrical work and site access. The middle-half depth range of 205 to 685 feet explains why two nearby lots can receive very different bids. If a driller prices only per foot, ask what is excluded before comparing proposals.

Environmental and Building Checks Near Larkspur Matter

Mapped sites within about 10 miles include 15 PFAS sampling or contamination sites, 30 historic mine features and 12 EPA Superfund or cleanup sites. These maps do not prove that a particular well is contaminated. They do justify checking the exact parcel, nearby land uses and available water-quality results.

Low yield is not the only concern. Confirm the well permit, construction report, static level, pump test and permitted use. Domestic and household wells make up 66% of the use mix, while stock accounts for 22%, irrigation 5% and monitoring 6%. A septic system, driveway and house site must also fit the lot’s setbacks, slope and access. Have the well and septic plans reviewed before committing to a building layout.

How to Evaluate a Larkspur Lot Before Closing

Start with the well record, not the listing description. Match the permit to the parcel, confirm whether the well is recorded as constructed, and obtain the original construction and pump documents. Compare nearby wells in Larkspur and surrounding Perry Park, Palmer Lake and Woodmoor, but give greater weight to wells in the same aquifer and similar terrain.

For a vacant lot, have a licensed driller review access, the proposed well location and a realistic depth range before you finalize a budget. Colorado DWR rules control the permit and use. An exempt household-use well is not permission for every possible use, and over-appropriated basins may require an augmentation plan. If the property is near mapped mine or cleanup features, include water testing in due diligence. The goal is to price both the likely well and the consequences if the first location or target depth does not work.

Well permits by decade near Larkspur

What a new well costs in Larkspur, CO

How this is built: the median permitted depth here times the per-foot range for this ground, plus the normal system costs. A lot at the 75th-percentile depth (685 ft) would run roughly $40,250–$59,950. See the full Colorado well cost guide.

Environmental sites mapped within about 10 miles

Counts come from EPA, USGS and state datasets layered on the Colorado Well Finder map. A count is not a verdict on any one well; it tells you what to test for.

Buying land near Larkspur? Know what it costs to build before you buy the dirt.

A listing photo can't tell you whether a lot is a dream or a money pit. Two parcels near Larkspur can carry the same asking price while one needs an $80,000 driveway and a $45,000 engineered septic the other doesn't. The well numbers on this page are the start of that answer. A Tri-Lakes Site Feasibility Report is the rest of it: a licensed general contractor, excavator and septic installer reads the parcel the way we would if we were about to build on it, and puts the real cost in writing before your money is committed.

Spend a little to know. Or gamble a lot to guess. Realtors sell the view and inspectors look at houses that already exist. We're the people who'd build it, so we catch what quietly turns a "great deal" into a budget disaster: bad access, buried rock, steep grade, soil that won't pass for a normal septic, water that's a fortune to reach. And if the lot is good, you've already got a builder ready to do the work, driveway to drywall.

• Instant Online Report, $99 — type the address and get a buildability read on the spot: parcel, terrain and slope, soil and septic outlook. Cheap enough to run on every lot you're shopping.
• Desktop Report, $500 — a contractor's from-the-desk feasibility read: Regulation 43 and county code, GIS parcel data, terrain, flood and drainage, soil and septic viability, setbacks and buildable envelope, nearby well depths from our 591,000-well database, the likely driveway route, and a preliminary site-development cost breakdown.
• On-Site Report, $2,000 — everything above, then boots and a drone on the actual ground: house pad and septic zone located, access and winter conditions checked, rock and soil observed in person, a 15 to 20 page written opinion you can hand a lender or seller. Credited toward your project if you build with us.

Under contract, comparing parcels, or a realtor with a rural listing whose buyers keep asking "what will it cost to build here?" This is the due-diligence step almost everyone skips, and the one that saves the most.

Common questions about wells in Larkspur

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