Castle Pines, CO — Douglas County

Furnace Replacement in Castle Pines

Replacing a furnace in Castle Pines means sizing for a 3°F winter design temperature, venting correctly at 6,559 feet, and pulling the right permit. We quote flat-rate, and the price we quote is the price you pay.

Licensed & insured • Family-owned since 2004 • Flat-rate pricing

✓ Upfront flat-rate pricing✓ Castle Pines permits handled✓ Carrier, Lennox & Trane✓ All major brands serviced
Furnace Replacement

Furnace Replacement for Castle Pines homes

Replacing a furnace in Castle Pines means sizing for a 3°F winter design temperature, venting correctly at 6,559 feet, and pulling the right permit. We quote flat-rate, and the price we quote is the price you pay.

You get a flat price in writing before any work, and we will tell you plainly when a repair is not worth doing.

See our main furnace replacement page for how we approach this work across the metro.

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Load calculation and sizing

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Altitude setup

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Venting and condensate

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Permit and inspection

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Haul-away of the old furnace

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Warranty registration

Castle Pines service(303) 627-3395Flat-rate • 7 days
Castle Pines, CO — local facts

Furnace Replacement in Castle Pines: what’s different here

Castle Pines has one of the highest shares of brand-new housing in the metro, and even the city says the electric provider depends on the address, so equipment and rebate choices start with an address check.

Altitude derate

Gas appliances are derated roughly 4% per 1,000 feet above 2,000 feet (the fuel gas code rule), so at 6,559 feet a furnace needs the correct orifices and manifold pressure to deliver its rating. We set it up for Castle Pines, not sea level.

Rebates in 2026

Black Hills Energy pays $260–$375 on a new 90%+ AFUE furnace for its gas customers. Xcel’s gas furnace rebates ended Jan. 1, 2026, and the federal 25C credit ended for anything installed after Dec. 31, 2025. If rebates matter, a cold-climate heat pump is where the money is.

Permit

Contractors need a City of Castle Pines Class G (Mechanical/HVAC) license before working in the city; no permits are issued to unlicensed contractors.

Hytek pricing

Furnace Replacement: $3,500 – $8,500 installed. Flat-rate, approved before work starts. Free estimates on replacements.

Elevation & climate

6,559 ft. Avg January low 18°F, avg July high 85.7°F, design temp 3°F, about 57.5 in of snow a year.

Homes

22.4% of Castle Pines homes were built in 2020 or later (median year built 2005).

Utilities

Electric: CORE Electric for most addresses; Xcel in Hidden Pointe. Gas: Xcel Energy or Black Hills Energy depending on address.

Permits

City of Castle Pines Building Department. Contractors need a City of Castle Pines Class G (Mechanical/HVAC) license before working in the city; no permits are issued to unlicensed contractors.

Rebates and programs for Castle Pines homeowners (2026)

  • CORE Cool Credits: CORE Electric members with central AC or a heat pump earn bill credits for letting an eligible smart thermostat take part in summer demand events. Source
  • Black Hills Energy 2026 gas rebates: For Black Hills gas customers: $260 (90% AFUE), $350 (95%) or $375 (97%) on a new furnace, up to $30 on a tune-up every 3 years, up to $100 on a smart thermostat. Source
  • Power Ahead Colorado: $1,500 off a new ENERGY STAR cold-climate heat pump (ducted or ductless) in an existing home. Needs pre-approval through a Power Ahead-badged contractor before work starts; stacks with utility and state incentives. Source
  • Colorado heat pump tax credit: $1,000 for air-source systems in 2026, claimed by a registered contractor who must pass at least a third to you as an invoice discount.

More Hytek services in Castle Pines

Castle Pines neighborhoods we serve

The Canyons, Hidden Pointe, Glen Oaks, Esperanza, Ventana, Amber Ridge — ZIP 80108

Furnace Replacement near Castle Pines

Furnace Replacement in Castle Pines: common questions

How much does furnace replacement cost in Castle Pines?

Our published range is $3,500 – $8,500 installed. Every Hytek job is quoted flat-rate and approved before work begins, so the price you agree to is the price you pay. Replacements get free in-home estimates; see the full HVAC cost guide for the other services.

Do I need a permit for HVAC work in Castle Pines?

Repairs generally do not. Replacing or installing a furnace, AC, heat pump or water heater does. Permits for Castle Pines addresses go through City of Castle Pines Building Department. Contractors need a City of Castle Pines Class G (Mechanical/HVAC) license before working in the city; no permits are issued to unlicensed contractors. We pull the permit and schedule the inspection.

What HVAC rebates are available in Castle Pines in 2026?

For heat pumps: either Xcel’s heat pump rebate or CORE’s thermostat credits, depending on which utility serves the address; the $1,500 Power Ahead Colorado rebate (pre-approval required); Colorado’s $1,000 air-source heat pump credit, at least a third of which the installer must pass to you as a line-item discount. Black Hills gas customers get $260–$375 on a new 90%+ furnace. Xcel’s gas furnace rebates ended Jan. 1, 2026, and the federal 25C credit does not apply to 2026 installs.

How long do furnaces last in Castle Pines?

Typically 15–20 years here. With a median home built in 2005, many Castle Pines houses are on their second or third furnace. Age alone is not a reason to replace; a cracked heat exchanger, repeated repairs over about $1,000, or a unit under 80% AFUE is.

Who provides gas and electricity in Castle Pines?

Electric: CORE Electric for most addresses; Xcel in Hidden Pointe. Gas: Xcel Energy or Black Hills Energy depending on address. That matters because rebates, operating costs and who you call about a gas leak all depend on the utility.

Does Hytek serve my part of Castle Pines?

Yes. We serve all of Castle Pines (ZIP 80108), including The Canyons, Hidden Pointe, Glen Oaks, Esperanza, Ventana. Call (303) 627-3395 or request service online.

Local data: U.S. Census Bureau (2025 population estimates; ACS 2020–2024 housing age), NOAA 1991–2020 climate normals, and city, county and utility program pages, checked September 2026. Rebates change; we confirm eligibility on your address when we quote.

Castle Pines, CO

Need furnace replacement in Castle Pines?

Flat-rate pricing, approved before work starts. Family-owned in Centennial since 2004.

Call (303) 627-3395
Or schedule online →

$100 furnace tune-up & safety checkup in Castle Pines

Before the first cold snap: our 20-point furnace checkup covers the heat exchanger, gas pressure, carbon monoxide output, igniter, flame sensor and filter, with a written report. Flat-rate, 60 to 90 minutes.

Book a furnace tune-upCall (303) 627-3395

More furnace help in Castle Pines: furnace repair in Castle Pines · furnace maintenance in Castle Pines · all furnace repair services.

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