Philadelphia · independent homeowner’s guide
Chimney repair in Philadelphia, explained in plain English
Leak around the stack, a home inspector’s note, a new furnace that needs a liner, or a quote you can’t make sense of? Start with what’s going on at your house. Our guides explain the parts, the warning signs, what’s urgent, what things cost and what to ask, with every rule and price linked to its source.
Up front: We’re an independent guide, not a contractor. If you want help, we’ll pass your request to one local chimney contractor. If we don’t have one for your job yet, we’ll tell you. They may pay us for that referral; you never pay us anything. How this works.
Optional · free · no obligation
Want a local pro to take a look?
We’re an independent guide, not a contractor. If you want help, we’ll pass your request to one local chimney contractor. If we don’t have one for your job yet, we’ll tell you. They may pay us for that referral; you never pay us anything. Who gets this: one independent Philadelphia chimney contractor, not a call list. We send them your name, phone, ZIP and what you write here, and they call or text you about this request only. If we don’t have a contractor for your job yet, we’ll tell you instead of passing it on. They may pay us for the referral. We don’t sell your details to lead brokers.
Start here
What’s going on with your chimney?
Pick the one that sounds like you. Each one leads to a plain-English guide you can read without giving us anything.
“I’m a brand-new homeowner and I’ve never dealt with a chimney.”
Start with the parts, the warning signs, and what’s urgent versus what can wait. No jargon, no pressure.
Read the first-timer’s guide →“My home inspector flagged my chimney.”
A general home inspection usually looks from outside. Here’s which chimney inspection level to ask for, and how to use the result.
What to do with the flag →“Water is leaking around my chimney.”
Most leaks come from the crown, cap, flashing or open mortar joints. Water that gets into old brick and mortar can freeze in winter and widen small cracks.
Find the likely source →“I bought an old rowhome and want to use the fireplace.”
If it hasn’t been used in years, get it swept and inspected before the first fire. On a rowhome the chimney may sit on the party wall you share with a neighbor.
Before your first fire →“I’m replacing my gas furnace or water heater.”
In a lot of Philly houses the old brick chimney is the furnace and water heater vent. A new appliance is the moment to check the flue liner.
Flues and liners →“I got a quote and I don’t know if it’s fair.”
Published price ranges, the City fees that can show up on a quote, and the line items a fair quote should spell out.
Check your quote →“A builder next door is going higher than my roof.”
Philadelphia has a specific rule for this, and the builder may have to pay to extend your chimney.
Know the rule →Guides by type of work
Four kinds of chimney work, explained
Chimney liners & relining
Stainless steel, clay and cast-in-place liners, and when a flue needs one.
02Inspections & sweeping
Level I, II and III inspections, annual sweeps, and pre-purchase checks.
03Crowns, caps, flashing & masonry
Leaks, cracked crowns, loose brick and rebuilding the stack above the roof.
04Furnace & water heater flues
Gas appliances venting into an old brick chimney, and what changes when you replace one.
Why it matters in a rowhouse city
Your chimney may be venting the furnace, not a fireplace
If your house has gas or oil heat, the chimney may be carrying exhaust from the furnace, boiler or water heater in the basement. That exhaust includes carbon monoxide, which is why the City’s chimney clearance rules exist: L&I says clearances are meant to “avoid any backdraft that may increase levels of carbon monoxide.”
The City’s Rowhouse Manual recommends you “hire a chimney sweep to clean and inspect chimneys once a year,” and check for cracking at flashing and chimney caps.
- 10 ftNew construction that rises above your roof within 10 feet of your chimney or vent triggers the City’s extension rules.
- 60 daysMinimum notice the builder must give you before work starts, with an offer to extend your chimney.
- $69L&I fee per heating apparatus connected to a flue or chimney in a one- or two-family home, if permitted separately.
Costs
What chimney work costs
There’s no City price list. These are published national ranges; a contractor has to inspect the flue to quote. Full cost guide.
| Job | Range | Source |
|---|---|---|
| Stainless steel liner, installed | $900–$3,800 | HomeGuide |
| Chimney sweep (includes a Level 1 inspection) | $150–$375 (avg. $275) | HomeGuide |
| Level 2 inspection (up to 2 flues) | $250–$600 | HomeGuide |
| Crown repair (minor) / full crown replacement | $200–$700 / up to $3,000 | HomeGuide |
| Flashing repair | $300–$1,800 | HomeGuide |
City rules
Permits and rules in brief
- Mechanical permit. L&I issues Mechanical Permits for devices regulated by the Philadelphia Mechanical and Fuel Gas Codes, and says a licensed contractor must perform the work. Some mechanical work qualifies for an EZ permit with no plans.
- Construction next door. If a new building rises above your roof within 10 feet of your chimney or vent, the builder must offer to extend it, with notice at least 60 days before work.
- Carbon monoxide alarms. Homes with fuel-burning appliances or an attached garage need CO alarms under the Fire Code, as L&I explains in Code Interpretation 0801.
- Historic properties. On the Philadelphia Register, masonry repair, flashing and mechanical vents need Historical Commission review. It’s free, and staff approve most applications.
Guides
Start here
Areas we have guides for: Fishtown, Northern Liberties, Mount Airy, Germantown, Society Hill, Passyunk Square, and the rest of the city.
References
- L&I: Chimney & vent clearance information sheet, Rev. 4.2025 (PDF)
- City of Philadelphia: Philadelphia Rowhouse Manual (PDF)
- L&I: Regulations concerning chimney and vent clearance on properties adjoining construction sites (PDF)
- City of Philadelphia: Get a Mechanical Permit
- L&I: Code Interpretation No. 0801, Carbon monoxide alarms (PDF)
- Philadelphia Historical Commission: Get approval for work to a historic property
- Philadelphia Historical Commission: permit log, October 2024 (PDF)
- HomeGuide: Chimney liner cost
- HomeGuide: Chimney sweep cost
- HomeGuide: Chimney inspection cost
- HomeGuide: Chimney repair cost
- PGW (Philadelphia Gas Works): emergency line on pgworks.com
Checked October 30, 2026. Codes, fees, programs and prices change; confirm with the source. Cost figures are published ranges, not quotes.
Optional · free · no obligation
Request a quote
We’re an independent guide, not a contractor. If you want help, we’ll pass your request to one local chimney contractor. If we don’t have one for your job yet, we’ll tell you. They may pay us for that referral; you never pay us anything. Who gets this: one independent Philadelphia chimney contractor, not a call list. We send them your name, phone, ZIP and what you write here, and they call or text you about this request only. If we don’t have a contractor for your job yet, we’ll tell you instead of passing it on. They may pay us for the referral. We don’t sell your details to lead brokers.
Have a chimney question you want a pro to look at?
Tell us your ZIP code, what the chimney serves and what you’re seeing. We’ll pass it to one independent Philadelphia chimney contractor, who contacts you to set up an inspection and a written quote. If we don’t have one for your job yet, we’ll tell you.
- You send the form
- We pass it to one local contractor, or tell you if we don’t have one yet
- They call or text you
Philly Chimney Repair is an independent guide, not a chimney contractor. If you ask for help, we’ll pass your request to one independent Philadelphia chimney contractor, who inspects, quotes and does the work. If we don’t have one for your job yet, we’ll tell you. That contractor may pay us for the referral. We are not affiliated with the City of Philadelphia, L&I or PGW. Disclosure.