About Hackettstown
Hackettstown is a town in Warren County, incorporated in 1853 and named for early landowner Samuel Hackett; it was once called Helms' Mills.
The town is home to the U.S. headquarters of Mars, Inc.
Census estimates for 2020 to 2024 put the median year built of housing in Hackettstown at 1967, with about 23% of housing units built before 1940.
Utility gas heats about 68% of occupied homes in Hackettstown, fuel oil about 17% and electricity about 11%.
We serve Hackettstown homes in ZIP code 07840.
What This Means for Your Hackettstown Chimney
Older homes, older flues
Where homes date from before the 1940s, chimneys often have clay tile flues, soft lime mortar or no liner at all, and decades of freeze and thaw open the joints. A yearly inspection catches cracked tiles and failing mortar while the fix is still small. Read: What Is a Clay Flue Liner?
Oil heat and the chimney
Where a home heats with oil, the boiler sends soot and acidic exhaust up the masonry chimney all winter, so the flue needs regular cleaning, and an unlined or oversized flue often needs a stainless steel liner sized to the boiler. Read: How Often Should an Oil Boiler Chimney Be Cleaned?
Gas boilers and water heaters
Gas appliances burn cleaner than oil, but their exhaust is wet. In an old masonry flue that water condenses, breaks down mortar and flue tiles, and shows up as white staining or crumbling brick. A liner made for gas protects the chimney. Read: Does a Gas Water Heater Need a Chimney Liner?
For the bigger picture, read our local guide: Chimney Care in Warren County, NJ: What Local Homeowners Should Know
Why Hackettstown Homeowners Call Us
- Family-owned, with our own crew and 15+ years of experience
- Licensed & insured
- Free written estimates before any work
- Upfront pricing, no hidden fees
Chimney Services in Hackettstown
- Chimney Sweeping in HackettstownCreosote out, draft back, ready for the next fire.Learn more
- Chimney Inspection in HackettstownKnow it is safe before you light it.Learn more
- Chimney Repair in HackettstownCracks, loose brick and failed mortar, fixed.Learn more
- Chimney Rebuild in HackettstownDown to sound masonry, built back right.Learn more
- Caps & Crowns in HackettstownKeep rain, birds and animals out.Learn more
- Chimney Liners in HackettstownSized for your fireplace, stove or boiler.Learn more
- Masonry & Tuckpointing in HackettstownFresh mortar joints that keep water out.Learn more
- Leak Repair in HackettstownWe trace the water and fix the cause.Learn more
- Fireplace Repair in HackettstownFirebox, damper and draft problems solved.Learn more
- Dryer Vent Cleaning in HackettstownLint out, faster and safer drying.Learn more
Nearby Areas We Serve in Warren County
By the numbers
What Hackettstown’s Weather and Homes Mean for Your Chimney
- 1967
- Median year Hackettstown homes were built
- 19.5%
- Of Hackettstown homes built before 1940
- 135
- Nights a year at or below freezing
- 18°F
- Average January low
- 23.3 in
- Snow in an average year
- 48.2 in
- Rain and melted snow a year
Half of the homes in Hackettstown were built before 1967, and 19.5% date from before 1940, so a good share of chimneys here were built to older standards, with clay tile liners and crowns that are now decades old. With about 135 freezing nights a year in Warren County, water that gets into a crack freezes and widens it again and again, which is why we check the crown and flashing on every visit.
Sources: NOAA 1991-2020 U.S. Climate Normals, Belvidere Brg station; U.S. Census Bureau, American Community Survey 2023 5-year estimates (Hackettstown town, Warren County, New Jersey). NOAA data · Census data

Limited time offer
$500 OFF
Any chimney service. Mention it when you call or book online.

Simple from the first call
How It Works
- Your callCall, text or book online
Tell us what you see or smell. A real person from our team answers and sets a time that suits you.
- The visitFree chimney inspection
Our own crew arrives in a marked Pro 1 van, covers the floor and inspects the chimney from the firebox to the cap, free of charge.
- The estimateFree written estimate
We walk you through what we found, in plain words, and put any repair in writing before work starts.
- The workThe job, done right
We do the work, clean up the roof, the yard and the room, and walk you through the finished job.
Book before the holidays. Fireplaces get their heaviest use from Thanksgiving to New Year. A free inspection now catches nests, creosote and cracked flue tiles before the first big fire and the family gatherings.
Book My Free InspectionFree Estimate in Hackettstown
Leave your details and our local team calls you back to set a time.