Chimney sweeps in Philadelphia: old houses, city permits and what to check
Updated · KeystoneProGuide editorial team
What should Philadelphia homeowners know about chimney sweeps?
That most homes here heat with gas, that a large share of them are old, and that one government, the city's, sets the rules for working on a chimney. Philadelphia issues its own permits and reviews masonry work on historic properties, and both its emergency managers and its gas utility tell residents to have chimneys looked after.
Why does a Philadelphia chimney matter even without a fireplace?
Because of what the houses are and how they are heated. The Census Bureau estimates that 39.9 percent of Philadelphia's 748,270 housing units were first built in 1939 or earlier, against 25.0 percent for Pennsylvania. Gas is the main heating fuel in 71.3 percent of the city's occupied homes, far above the state's 56.4 percent, and oil in only 2.7 percent.
So the question in Philadelphia is often about an old flue carrying the exhaust of a gas heater or water heater. The trade's certification body, CSIA, says that is a combination to watch: many gas appliances use chimneys that once served oil furnaces, modern gas furnaces put more water vapor into the flue, and clay liner tiles can flake off under those corrosive conditions and block it.
The city's own institutions say much the same. Philadelphia's gas utility tells customers to have their appliances, chimney and flue serviced regularly by a qualified technician. The Office of Emergency Management lists plugged or cracked chimneys among the sources of dangerous carbon monoxide levels.
Who may work on your chimney in Philadelphia?
A contractor who works only on existing one- or two-family dwellings does not need the city's contractor license, but must be registered with the state as a home improvement contractor. Where the job needs a permit, the city adds a condition: on such a house the work may be done by a licensed Philadelphia contractor, by an owner who lives in the building, or by a registered Pennsylvania home improvement contractor who holds a Philadelphia Commercial Activity License.
The Department of Licenses and Inspections has an online tool that lists every actively licensed contractor and any licensing violations. For questions, the city says to call 311.
When does chimney work need a city permit?
The city's permit pages do not name chimney sweeping, and the general rules suggest no permit is needed for it.
- Routine upkeep. A Mechanical Permit is not needed for ordinary repairs or maintenance to mechanical systems, and a Building Permit is often not needed for repairs related to regular maintenance.
- Repointing. The city lists pointing masonry among the jobs that often need no Building Permit, as long as the property is not on the historic register.
- Major repairs. A Building Permit is required for major repairs that are not part of regular maintenance, and for work that partially or fully demolishes a structure. Rebuilding a stack is the kind of job to ask L&I about first.
- Heating equipment. A Mechanical Permit is needed to install heating and venting equipment. The fee schedule has a line for a warm air heating apparatus connected to a flue or chimney: $69 for each one in a one- or two-family dwelling.
- Extending a chimney. L&I publishes a no-plans permit standard for chimney and vent extension. The standard itself is a separate document that was not read for this guide, so ask L&I when it applies.
What if your house is on the historic register?
Then the exemptions above fall away. For a property on the Philadelphia Register of Historic Places, the city requires the Historical Commission's review of masonry cleaning, pointing, repair, replacement, alteration or removal, and of roofing and flashing. L&I will refuse a permit application that lacks the commission's approval.
There is no charge for the review, it is requested as part of the building permit, and the city says the staff often approves applications without sending them to the full commission. The staff can be reached at preservation@phila.gov while a job is still being planned.
What does the city say about heating fires and carbon monoxide?
The Office of Emergency Management's winter guidance says home heating is the second-leading cause of fires, and that fifty percent of the carbon monoxide incidents reported to local fire departments occur between November and February, peaking in December. Its precautions include having heating equipment and chimneys cleaned and inspected each year by a professional.
What has gone wrong locally, and where do you complain?
In April 2025 the Pennsylvania Attorney General announced a lawsuit against a Philadelphia-based home improvement contractor over shoddy work and unreturned payments. The office said one consumer had paid a $500 deposit for chimney work that was never started. The suit, filed in the Philadelphia County Court of Common Pleas, alleges that the business did not abide by the state's home improvement law and that its contracts lacked essential items such as a notice of cancellation.
Complaints about a contractor go to the Attorney General's office, which gives 1-800-441-2555 in that release. What Pennsylvania requires of chimney sweeps sets out the contract terms you are owed, and how to choose a chimney sweep covers credentials. Businesses serving the city are on the Philadelphia chimney sweeps page.
Sources
- 2020-2024 ACS 5-Year Narrative Profile: Philadelphia County, Pennsylvania, U.S. Census Bureau
- 2020-2024 ACS 5-Year Narrative Profile: Pennsylvania, U.S. Census Bureau
- Avoiding Carbon Monoxide Hazards, Chimney Safety Institute of America (CSIA)
- Natural Gas Safety, Philadelphia Gas Works
- Carbon monoxide poisoning, City of Philadelphia
- Winter weather outlook 2025: What to know to be prepared, City of Philadelphia
- Find a licensed contractor and contractor information, City of Philadelphia
- Get permits without plans (EZ permits), City of Philadelphia
- Get a Mechanical Permit, City of Philadelphia
- Get a Building Permit, City of Philadelphia
- EZ permit standards (permits without plans), City of Philadelphia
- Get approval for work to a historic property, City of Philadelphia
- AG Sunday Files Lawsuit Against Philadelphia Home Improvement Contractor who Failed to Complete Work or Issue Refunds, Pennsylvania Office of Attorney General