The Cost of Owning a Colorado Mountain Home Near Denver

How is property tax figured on a Colorado mountain home in 2026?

• Step 1: reduce the value. Subtract 10% of the first $700,000 of actual value. An $880,000 home becomes $810,000.
• Step 2: assess it. Multiply by 6.80% for local-government levies and 7.05% for school levies (2026).
• Step 3: apply mills. Multiply assessed value by the mill levy and divide by 1,000.
• Evergreen example. Jefferson County Tax District 4493 totals 91.3199 mills. On $880,000, the math lands between $5,030 (all at 6.80%) and $5,215 (all at 7.05%).
• Breckenridge example. Summit Tax Area 3 totals 58.061 mills (2025). On $1,187,000, the Zillow typical value, the math lands between $4,410 and $4,572.

Mill levies are 2025 figures and the split between school and local mills varies by district. Confirm the actual bill with the county assessor and treasurer or a tax professional.

What drives homeowners insurance cost on a mountain home?

• Wildfire risk score. Starting July 1, 2026, insurers send a yearly written risk score and list their mitigation discounts (HB25-1182).
• Mitigation. Insurers whose models ignore mitigation must discount documented mitigation work.
• Roof and Zone 1. A Class A roof and a clear 0-5 foot zone are the core of the state wildfire guidance.
• Last resort. The Colorado FAIR Plan requires proof of three declines and pays actual cash value.

Get a written quote from your insurer before the inspection deadline and confirm the premium with the insurer.

What do propane and electricity cost in the mountains?

• Propane. $2.302 a gallon, Colorado residential, week of March 30, 2026, the last heating-season value (EIA).
• CORE Electric. $0.1155 per kWh plus a $20 basic charge (2026).
• United Power. $0.1184 per kWh plus a $22 fixed charge (2026).
• Heat pump credit. Colorado 2026: $1,000 air-source, $2,000 ground-source, $250 heat pump water heater (Colorado Energy Office).

Ask the seller for 12 months of propane and electric bills.

What do septic and well upkeep cost?

• Septic at sale. Jefferson $100, Clear Creek $100, Gilpin $110, Summit $230, Boulder $500 (county fee schedules).
• Pumping. Every 3-5 years; inspect every 3 years (US EPA).
• Well water tests. Test yearly for coliform, nitrate/nitrite, TDS and pH; every 3-5 years for arsenic, uranium and lead (CDPHE).
• Well permit transfer. The DWR change-of-owner eForm has no fee.

What yearly upkeep does a mountain lot add?

• Plowing. Private roads and driveways are a private cost. Jefferson County does not plow private roads; Clear Creek, Gilpin, Larimer and Teller plow them only in life-threatening emergencies.
• Slash. Jefferson County slash collection: $24 per load, cards only. Summit County chipping is free June 1-July 24.
• Mitigation credit. The 2025-2027 state credit covers 100% of qualified contractor costs up to $1,000, income limit $129,200 (2025). Confirm with a tax professional.
• Wildfire Partners. Boulder County: first assessment free, re-certification $100.

What internet is available in the mountain towns?

• Evergreen. Xfinity cable covers 54.5% of addresses.
• Estes Park. Trailblazer fiber covers 89.5%.
• Woodland Park. TDS covers 92.8%.
• Everywhere. Starlink is available in every town.

Coverage: BroadbandNow, Sept. 24, 2026. Check service at the exact address before you remove contingencies.

What does radon testing and mitigation cost?

• Test. A professional test runs around $150 (CDPHE).
• Mitigation. $1,000-$2,000 (CDPHE).
• County results. Share of tests at or above 4 pCi/L, 2005-2025: Jefferson 50.3%, Clear Creek 37.3%, Park 49.0%, Gilpin 54.9%, Summit 46.1%; statewide 46.4%.
• Why test. CDPHE attributes about 500 lung cancer deaths a year in Colorado to radon.