Chimney inspections when buying a Philadelphia house

Which level to ask for

CSIA’s summary of the NFPA 211 standard describes Level I as the routine check for a chimney that will keep being used the same way. Level II adds accessible attics, crawl spaces and basements, may include a smoke or pressure test, and can include a video inspection of the flue. CSIA says a Level II is “also required upon the sale or transfer of a property,” as well as when you add a heating appliance, change fuel type, or after a malfunction or event likely to have damaged the chimney. Ask the sweep which level they’re doing and get it in writing.

What it costs

HomeGuide lists $100–$250 for Level I, $250–$600 for Level II with up to two flues, and $900–$5,000 for Level III.

What to look for in the report

• Liner condition: cracked or missing clay tiles, corrosion in metal liners
• Whether each appliance has its own properly sized flue
• Crown, cap and flashing condition
• Mortar and brick condition on the stack above the roof
• Any newer neighboring building that rises above the chimney (see our guide)

Using it in negotiation

A relining estimate is a concrete number to bring to the seller. HomeGuide puts typical relining with removal of an old liner at $1,200–$4,600. Get a written quote before your inspection contingency runs out.