On this page · 13 sections
- Chimney sweeps in Denver
- Denver's climate and what it does to chimneys
- Denver housing stock and common chimney types by neighborhood
- Denver rules: burn restrictions, permits, licensing and landmarks
- Estimated chimney costs in Denver (2026)
- Worked examples from Denver neighborhoods
- When to book a sweep in Denver
- How to find and vet a sweep in Denver
- Denver-specific tips
- Nearby areas served
- Denver chimney FAQ
- More Colorado city guides
- Sources
Denver's chimneys are older than Colorado's as a whole. The median home in the city was built in 1975, against a statewide median of 1988, and 16.9% of Denver's housing units date from 1939 or earlier (Census ACS estimates), more than double the state share. That pre-war brick stock fills Washington Park, Baker, Congress Park and Park Hill, where one chimney often serves a fireplace plus a furnace or water heater. Add 1950s ranches (12.3% of units) and a post-2000 boom (about 31% of units, mostly townhomes with factory-built gas fireplaces), and a Denver sweep can go from a 1905 Victorian to a 2019 row home in one afternoon.
Three local facts shape most chimney decisions here: Denver is inside the state's winter no-burn program with no elevation exemption, it is one of the most hail-prone big cities in the country, and it runs its own permits, contractor licensing and 56 historic districts. For statewide background, see our Colorado chimney guide.
Chimney sweeps in Denver
20 chimney companies based in Denver, plus 6 nearby that serve the area. Order reflects listing tier, verification and profile completeness (credentials, reviews, independent sources) — not an endorsement.
Denver, CO
Denver, CO
Denver, CO
Denver, CO
Also serving Denver
Wheat Ridge, CO
Denver's climate and what it does to chimneys
Denver's averages look mild: a January average high of 44.6 °F and low of 18.7 °F, about 49 inches of snow and only 14.48 inches of total precipitation a year. The problem is the swings. Chinook winds can push a January afternoon into the 50s, then an arctic front drops the city below zero; the average coldest night is about −11 °F and the record is −29 °F (1875). Meltwater in crown cracks refreezes nightly, and within a few winters the top brick courses loosen.
| Factor | Denver figure | What it does to a chimney |
|---|---|---|
| Elevation | 5,280 ft (city ranges 5,130–5,680 ft) | Air pressure about 83% of sea level, so draft is weaker; short ranch chimneys may smoke on startup |
| January average high / low | 44.6 °F / 18.7 °F | Near-daily freeze-thaw on sunny winter days |
| Average coldest night | about −11 °F | Clay liner tiles and exterior chimneys cycle through large temperature ranges |
| Annual snowfall | about 49 inches | Wet spring snow sits on crowns and behind wide chimneys |
| Hail | Among the 10 most hail-prone large U.S. cities | Dented chase covers that pond water; cracked crowns; torn cap mesh |
| Winter inversions | "Brown cloud" season November–March | Smoke stays near ground, leading to state Action Days |
Hail deserves special attention. The costliest storm in Colorado history, on May 8, 2017, hit the Denver metro and caused about $2.3 billion in insured losses (RMIIA). Flat chase covers on newer homes dent into water-holding bowls, and thin crowns on older homes chip. Both leak slowly, often showing up as a ceiling stain the next winter.
Denver housing stock and common chimney types by neighborhood
Denver has 78 official neighborhoods, and each building era left a different kind of chimney. The table below matches the most common types to verified neighborhood building periods.
| Area | Main building era | Typical house types | Typical chimney setup | Common problems |
|---|---|---|---|---|
| Baker (historic district) | 1873–1937; more than 80% developed by 1900 | Late Victorian brick, terrace rows, bungalows | Interior brick chimneys, some unlined coal-era flues | Missing liners, soft mortar decay, uncapped abandoned flues |
| Washington Park (east and west) | Mostly brick, 1900–1940 | Denver Squares, Craftsman bungalows, Tudor and Prairie-influenced homes | Brick chimney with fireplace flue plus furnace/water heater flue | Orphaned water heater flues, cracked tiles, crown cracks |
| Congress Park / 7th Avenue | Platted 1887–1888; includes the 7th Avenue Historic District, Denver's largest | Denver Squares, larger brick homes, some mansions on the parkway | Tall multi-flue brick chimneys | Several flues to clean and cap; district rules for rebuilds |
| Park Hill (South, North, Northeast) | Platted from 1887; heavy building in the early 20th century and after WWII | Brick bungalows, Denver Squares, Tudor Revival, post-war brick ranches in the north and northeast | Brick fireplaces, often with basement ash dumps | Failed dampers, spalled brick, animals in uncapped flues |
| Harvey Park and similar SW Denver tracts | About 4,000 homes built 1954–1957; most 1954–1965 | Mid-century ranches, including about 170 Cliff May designs | Low, wide brick chimneys; some serve only a furnace | Poor draft, flat crowns, orphaned flues |
| Central Park (former Stapleton airport) | Construction began 2001 | Single-family homes, row homes, townhomes, condos | Factory-built and direct-vent gas fireplaces | Hail-dented terminations, soot from mis-set gas input |
| Infill townhomes citywide (Highland, Sloan's Lake, Berkeley, RiNo) | 2010s–2020s | Three- and four-story "slot homes" and duplexes | Direct-vent gas fireplaces | Blocked vents, rarely serviced units |
A Denver Square is the local name for the American Foursquare, built from the mid-1890s to the late 1930s. Its chimney often rises near the center of the house, which keeps the flue warm and drafting well. Bungalows more often have a side-wall chimney that runs cold, collecting more creosote and more freeze-thaw damage.
The big shared risk in pre-1980 Denver houses is the orphaned gas flue: after a furnace upgrade to a high-efficiency model vented through PVC, the water heater is left alone in a large clay-tile flue it cannot keep warm. Exhaust moisture condenses, dissolves mortar and flakes tiles, which Denver sweeps often find piled in the basement cleanout. The fix is a properly sized liner; see our chimney liners guide.
Denver rules: burn restrictions, permits, licensing and landmarks
Action Days: when you can use a wood fireplace in Denver
All of the City and County of Denver sits inside the seven-county area where Colorado's Regulation No. 4 limits wood burning on high pollution days. The Colorado Department of Public Health and Environment (CDPHE) issues a forecast daily at 4 p.m. from October 31 through March 31, and restrictions apply November through March. On a declared Action Day you may not burn in an open fireplace or an uncertified stove or insert. Allowed: EPA Phase II–certified wood stoves and inserts, certified pellet stoves, Colorado-approved masonry heaters and gas appliances. The 7,000-foot exemption that helps foothill homes does not reach Denver, and a primary-heat exemption letter is rare in a city where most homes heat with gas. CDPHE's advisory line is 303-758-4848; its indoor burning line for questions and complaints is 303-692-3280.
Denver also has air-quality provisions in city code, and the Denver Department of Public Health and Environment (DDPHE) handles local questions. We could not access the current ordinance text, so before adding, converting or restoring a wood fireplace, ask DDPHE through Denver 311 whether city rules go beyond the state program. Under Regulation No. 4, new fireplaces in the program area must be gas, electric or fitted with a certified insert or device.
Permits and contractor licensing in Denver
Denver's building permits and contractor licenses come from Community Planning and Development (CPD). Denver issues its own contractor licenses and certificates, does not accept licenses from other jurisdictions, and requires a supervisor certificate before a contractor can hold a license. A suburban company's Aurora or Jefferson County license does not cover work inside Denver.
| Job | Permit typically needed in Denver? | Denver-specific notes |
|---|---|---|
| Sweep and Level 1 or 2 inspection | No | Keep the report; the Colorado seller disclosure asks when the chimney was last cleaned |
| New cap or chase cover | Usually no | In a landmark district, a visible change to the chimney top may need design review; ask first |
| Stainless liner for fireplace or gas appliance | Often yes; ask CPD | Relining is treated as an alteration in many jurisdictions |
| Wood or pellet insert or stove | Yes | Must be EPA-certified; this is the path to burning wood on Action Days |
| Gas insert or gas fireplace | Yes | Gas input must be set for 5,280 ft per the manufacturer |
| Rebuild above the roofline | Often yes | Historic districts may require matching brick and mortar |
| New masonry fireplace | Yes | New wood-burning open fireplaces are generally not allowed in the program area |
We could not verify every permit trigger in Denver's adopted code; confirm with CPD and get in writing who pulls the permit and books the final inspection.
Landmark districts and masonry repairs
Denver City Council has designated 56 historic districts by ordinance, including Baker, Potter Highlands, Country Club, Swallow Hill, Wyman, the Curtis Park districts, Clements, Witter-Cofield, Montclair and the 7th Avenue district through Congress Park. In a local district, visible exterior changes such as rebuilding, shortening or removing a chimney generally go through landmark design review in CPD before a permit. Hire a mason who can match historic brick and uses mortar softer than the brick; hard Portland-cement mortar makes old soft brick spall.
Carbon monoxide alarms and fire department guidance
Colorado law requires CO alarms within 15 feet of each sleeping room in homes with a fuel-fired appliance, fireplace or attached garage at sale, during permitted appliance work and, for rentals, at each change of tenancy. That rental rule matters in a city where 51.2% of occupied homes are rented. For a chimney fire (a roar in the flue, flames or sparks from the top), get out and call 911; the Denver Fire Department responds.
Estimated chimney costs in Denver (2026)
These are estimated ranges based on 2026 national surveys (HomeGuide, Angi) adjusted to the Front Range figures on our state page. Denver lands mid-to-upper range because of labor costs, multi-flue chimneys and tall two-story brick stacks. Get two written quotes for repairs.
| Service | National range | Denver estimate | What pushes a Denver quote up |
|---|---|---|---|
| Wood fireplace sweep with Level 1 | $130–$380 | $175–$400 | Two-story brick chimneys, steep roofs |
| Gas fireplace service | $80–$150 | $100–$200 | Disassembling sealed direct-vent units |
| Factory-built (prefab) fireplace sweep | $90–$175 | $125–$250 | Chase access on three-story townhomes |
| Additional flue (furnace or water heater) | 2 flues $250–$400 total | add about $75–$150 per flue | Common in pre-1980 houses with shared chimneys |
| Level 2 camera inspection | $250–$600 | $275–$600 | Multiple flues; written report for a sale |
| Chimney cap | $75–$850 | $150–$850 | Multi-flue stainless caps on older brick chimneys |
| Chase cover (prefab) | — | $300–$1,200 | Custom stainless sizes after hail |
| Crown repair / rebuild | $150–$700 / $1,000–$3,000 | $200–$800 / $1,100–$3,200 | Tall chimneys, historic brick matching |
| Tuckpointing | $500–$2,500 | $550–$2,600 | Lime mortar matching in landmark districts |
| Stainless liner (fireplace) | $1,500–$5,000+ | $1,800–$5,500 | Breaking out tiles; insulated liners |
| Water heater liner (orphaned flue) | — | about $1,000–$1,800 | Chimney height, basement access |
| Damper replacement | $160–$520 | $200–$575 | Top-sealing damper upgrade |
| Full rebuild above roofline | $4,000–$15,000 | $4,500–$15,000+ | Landmark review; brick matching |
For what drives these prices, see chimney sweep cost and chimney repair cost.
Worked examples from Denver neighborhoods
These are illustrative scenarios based on common Denver situations, not real customers. Costs are estimates within the ranges above.
When to book a sweep in Denver
- March–May: best for wood fireplaces; creosote comes off easily after the season and schedules are open. Hail season starts mid-April.
- June–August: masonry, crown and liner work, while mortar can cure above freezing.
- September–October: peak demand; Denver sweeps often book weeks out. Pair gas fireplace service with the furnace tune-up.
- November–March: Action Day season. Call right away after smoke spillage, a CO alarm or a chimney fire.
How to find and vet a sweep in Denver
- Search the CSIA "Find a Pro" tool and the National Chimney Sweep Guild directory; check recent reviews and the BBB.
- Verify the technician's CSIA or NFI certification number.
- For liners, stoves, inserts, gas fireplaces and rebuilds, confirm a current Denver contractor license with CPD; suburban licenses do not transfer.
- Get liability and workers' compensation certificates.
- In a landmark district, ask about their experience with design review and mortar matching.
- Require a written report with photos or video of every flue.
- After hail, avoid door-knockers who push you to sign over an insurance claim. See chimney sweep scams.
Denver-specific tips
- Count your flues. Ask for a per-flue price so the furnace and water heater flues are covered, not just the fireplace.
- Close unused flues properly. Cap an abandoned coal-era flue at the top and seal it at the bottom.
- Townhome HOAs in newer neighborhoods may own the roof and vent terminations; know who is responsible before hail season.
Nearby areas served
Denver sweeps commonly serve Aurora, Lakewood, Englewood, Glendale, Wheat Ridge, Edgewater, Arvada, Westminster, Commerce City, Cherry Hills Village, Greenwood Village and Centennial. Neighborhoods include Washington Park, Platt Park, Baker, Capitol Hill, Congress Park, Hilltop, Park Hill, Montclair, Highland, Berkeley, University Park, Harvey Park, Bear Valley and Central Park.
See also: Colorado chimney guide, Littleton chimney sweeps, Boulder chimney sweeps and Castle Rock chimney sweeps.
Denver chimney FAQ
12 answersCosts
How much does a chimney sweep cost in Denver?
Expect an estimated $175–$400 for a wood-burning fireplace sweep with a Level 1 inspection, based on 2026 national surveys ($130–$380) adjusted for Front Range labor. Gas fireplace service runs about $100–$200, and a prefab fireplace about $125–$250. Many older Denver houses have a second or third flue for the furnace or water heater, which typically adds $75–$150 per flue. Ask for a per-flue price and a written report with photos so you know exactly what was cleaned.
What does it cost to reline a chimney in Denver?
A stainless liner for a wood fireplace or insert typically runs an estimated $1,800–$5,500 in Denver, depending on height, diameter, whether old clay tiles must be broken out and whether the liner must be insulated. A smaller liner for an orphaned gas water heater flue is often $1,000–$1,800. Relining usually counts as an alteration, so confirm whether a Denver permit is needed and that the contractor holds a Denver license, since the city does not accept licenses from other jurisdictions.
Does insurance cover hail damage to my chimney in Denver?
Often yes, when the damage is sudden and documented. Dented chase covers, crushed caps and cracked crowns are usually added to a wind and hail roof claim. Photograph the chimney top soon after the storm, get a written sweep or roofer report, and file it with the roof claim. Insurers generally exclude rust and gradual leaks, so waiting until a ceiling stain appears next winter weakens the claim. Check whether your hail deductible is a percentage of dwelling coverage.
Burn rules
Can I use my fireplace on a no-burn day in Denver?
Not if it is an open wood fireplace or an uncertified stove or insert. All of Denver is in the Regulation No. 4 program area, and at 5,280 feet no part of the city qualifies for the 7,000-foot exemption. On CDPHE Action Days, allowed devices are EPA Phase II–certified wood stoves and inserts, certified pellet stoves, Colorado-approved masonry heaters and gas fireplaces. Forecasts come out at 4 p.m. daily from October 31 to March 31; the advisory line is 303-758-4848.
What happens if I burn wood on an Action Day in Denver?
CDPHE says state penalties can reach $15,000 per day, though typical fines run about $100–$300 and the focus is compliance. To ask about a situation or report smoke, call CDPHE's indoor burning line at 303-692-3280 or contact DDPHE through Denver 311. The simplest way to stay compliant is to check the 4 p.m. forecast on the CDPHE air quality site or advisory line (303-758-4848) before you light a fire.
Can I build a new wood-burning fireplace in Denver?
Generally not an open one. Regulation No. 4 requires new fireplaces in the Denver-metro program area to be gas, electric, or fitted with a certified insert or device meeting wood stove emission standards, which covers additions and major remodels. For a wood fire in new construction, plan on an EPA-certified insert or stove installed under a Denver permit by a Denver-licensed contractor. Ask DDPHE and CPD before design work starts.
Older homes and local rules
Do I need permission to repair a chimney in a Denver historic district?
If your house is in one of Denver's 56 locally designated historic districts, such as Baker, Potter Highlands, Country Club or 7th Avenue, visible exterior changes like rebuilding, shortening or removing a chimney generally require landmark design review through Community Planning and Development before a permit. Routine sweeping, interior liners and like-for-like repointing are usually simpler. Ask CPD's landmark staff before you sign a contract, and hire a mason experienced with historic brick and softer lime-based mortars.
Why is there broken tile in my basement chimney cleanout?
In older Denver houses this usually means the clay flue liner is breaking down. The most common cause is an orphaned water heater: after a furnace upgrade, the water heater alone cannot keep a large masonry flue warm, so exhaust moisture condenses and attacks the tiles and mortar. Stop and have a Level 2 camera inspection ($275–$600). The typical fix is a properly sized liner for the remaining appliance, about $1,000–$1,800, plus a CO alarm check.
Why does my Denver fireplace smoke when I light it?
At 5,280 feet, air pressure is about 83% of sea level, so every chimney drafts a little less. Short chimneys on 1950s ranches, large fireplace openings, cold exterior chimneys, and tight homes with strong kitchen or bath fans make it worse. Start with a sweep to rule out blockage, then try warming the flue with rolled newspaper, cracking a window, a smoke guard ($150–$300) or glass doors. A taller flue or outside-air kit is the next step.
Hiring and safety
Do chimney sweeps need a license in Denver?
Colorado has no state chimney sweep license. Sweeping itself generally does not need a license, but Denver requires its own contractor license for permitted work such as installing stoves, inserts, gas fireplaces and liners, or rebuilding chimneys, and it does not accept licenses from other cities. Gas-line work also needs appropriate licensing. Look for CSIA or NFI certification as proof of training, and verify any Denver license with Community Planning and Development before the job.
How often should I have my chimney cleaned in Denver?
NFPA 211 calls for an annual inspection of every chimney, fireplace and vent, used or not. Most Denver fireplaces see occasional use, so a yearly sweep and inspection in spring or summer is typical. If you burn in a wood insert or stove several times a week, check creosote mid-winter and sweep whenever it reaches about 1/8 inch. Gas fireplaces and furnace or water heater flues should be checked yearly for blockages, corrosion and correct venting.
What should a Denver home buyer ask about the chimney?
Check Section F of the seller's disclosure for the fireplace type and the date it was last cleaned, then order a Level 2 inspection, which NFPA 211 recommends at a sale. In pre-1980 homes, have every flue camera-inspected, including the furnace and water heater flue. In historic districts, ask whether past chimney work was permitted. In townhomes, find out whether the HOA or the owner handles vent terminations.
More Colorado city guides
Sources
Facts, figures and rules on this page were checked against these sources. Prices are estimates based on 2026 national surveys adjusted for local costs.
- 1.Wikipedia, Denver (elevation, climate normals, hail ranking, neighborhoods)
- 2.Point2Homes, Denver demographics (ACS year built, median year built, tenure)
- 3.Census Reporter, Denver profile (ACS 2024 housing units, median value)
- 4.Wikipedia, Washington Park, Denver
- 5.Wikipedia, Park Hill, Denver
- 6.Wikipedia, Congress Park, Denver
- 7.Wikipedia, Baker, Denver
- 8.Wikipedia, Harvey Park, Denver
- 9.Wikipedia, Central Park, Denver
- 10.Wikipedia, American Foursquare (Denver Square)
- 11.Wikipedia, List of Denver landmarks (historic districts)
- 12.CDPHE, Indoor burning restrictions
- 13.CDPHE, Indoor burning frequently requested information
- 14.Colorado Air Quality Control Commission, Regulation Number 4 (5 CCR 1001-6)
- 15.U.S. EPA Burn Wise, Ordinances and regulations for wood-burning appliances
- 16.City and County of Denver, Contractor Licensing
- 17.Rocky Mountain Insurance Information Association, Hail
- 18.C.R.S. 38-45-104 (CO alarms, rentals)
- 19.Colorado Real Estate Commission, Seller's Property Disclosure (Residential)
- 20.CSIA, Homeowner resources
- 21.HomeGuide, Chimney sweep cost (2026)