Mold Testing in Philadelphia County, PA
PRO-LAB certified mold inspection across Philadelphia's neighborhoods, from Queen Village and Fishtown to Chestnut Hill and Mt. Airy. Air sampling, an outdoor control sample, and lab results in 2 to 3 days, starting from $275. Bob handles row homes, condos, and rentals personally. Call 610-348-6728 for a free estimate.
Philadelphia County, Pennsylvania
Mold Inspection & Testing across Philadelphia County
Written by Bob, owner and inspector, All Seasons Home Inspections ·
Mold testing in Philadelphia County starts at $275 and includes air sampling, an outdoor control sample, and PRO-LAB certified analysis returned in 2 to 3 days. Bob collects every sample personally across the city, from Queen Village to Chestnut Hill.
Philadelphia is the oldest housing stock All Seasons works in. Thirteen of the fifteen neighborhoods Bob covers here are predominantly pre-1920, and that single fact drives almost everything he finds. Lime plaster on wood lath, Wissahickon schist foundations, clay waste laterals, and party walls shared with the house next door are the standard construction, and each one behaves differently around water than anything built after the war.
The party wall is the detail that makes Philadelphia different from every suburban county. In a row home, your wall is also your neighbor's wall, which means their roof leak, their failed downspout, or their unvented basement becomes your mold problem. Bob samples a lot of Philadelphia homes where the moisture source is legitimately not on the property, and knowing that before you negotiate is worth considerably more than the test costs.
Who does your mold testing
Bob, owner and inspector
Every sample on every Philadelphia County job is collected by Bob personally. Not a technician, not a subcontractor, and not a different person each visit. He has been inspecting homes in Philadelphia County and the greater Philadelphia region since 2003, he is InterNACHI certified, and every sample he takes goes to a PRO-LAB certified laboratory. All Seasons does not perform mold removal or remediation, so there is no financial reason to find a bigger problem than you have.
Why is mold different in Philadelphia row homes?
A row home has two exterior walls instead of four, and the two long walls are shared. There is no way to dry a party wall from both sides, so moisture that enters it stays. When the neighboring property is vacant, poorly maintained, or has an open roof, that shared wall becomes a continuous moisture source into your house.
Flat roofs compound it. Most Philadelphia rows have low-slope roofs that drain to an internal or rear leader, and when that leader clogs the water does not run off the edge, it ponds. Bob regularly documents standing water on Philadelphia flat roofs during inspections, and ponding above a plaster ceiling is a mold problem on a timer.
Then there are the clay laterals. Cast iron and clay waste lines under Philadelphia basements are frequently at or past the end of their service life, and a cracked lateral wets the soil directly under the slab. That produces a persistent, low-level basement humidity that no dehumidifier solves because the source never stops.
Which Philadelphia neighborhoods does Bob test?
Bob covers Bella Vista, Brewerytown, Chestnut Hill, East Falls, Fairmount, Fishtown, Germantown, Graduate Hospital, Manayunk, Mt. Airy, Northeast Philadelphia, Northern Liberties, Queen Village, Roxborough, and Center City.
The rowhome neighborhoods, Fishtown, Northern Liberties, Queen Village, Bella Vista, Graduate Hospital, and Brewerytown, produce the party wall and flat roof pattern described above, often in houses that have been renovated once or twice with the moisture never addressed.
The northwest, Chestnut Hill, Mt. Airy, Germantown, East Falls, Roxborough, and Manayunk, is a different animal. Larger detached and twin stone houses on sloped lots near the Wissahickon and Schuylkill, with the moisture arriving through stone foundations and hillside grade rather than through a shared wall. Bob has documented active water infiltration on Germantown stone basement walls and mold in Chestnut Hill condo units on the same week.
What about mold in Philadelphia condos and apartments?
Condo and apartment testing is a large part of Bob's Philadelphia work, and it raises a question suburban testing rarely does: whose problem is this. When the moisture originates in the unit above, in a common riser, or in a building-owned mini-split, the answer determines who pays.
Bob documents the finding and the likely source in writing, which is what a condo board or a landlord actually responds to. He has traced Chestnut Hill unit issues to ceiling leaks from above, to closet corners with no ventilation, and to mold on the mini-split air handler itself.
If you are a renter, a written third-party report is usually the difference between a request that gets ignored and one that gets acted on.
What does mold testing cost in Philadelphia County?
Mold testing starts from $275. The cost tracks the number of areas that need sampling rather than the neighborhood or the size of the property. A single basement or a single condo unit with an outdoor control is the typical job.
There is no city surcharge. Bob is based in Wyncote, just over the county line, and reaches most Philadelphia neighborhoods in under 30 minutes.
What should I do before the inspection?
Do not clean or treat the area first. Wiping down visible growth or spraying bleach the night before changes what the air sample captures and hides the very thing you are paying to have measured.
Keep windows shut for a few hours beforehand where you can. In a Philadelphia row home with windows open onto a busy street, an air sample can end up measuring the block rather than the house.
Gather the building history if you have it, and in a row home that includes the neighbors. A vacant property next door, an open or tarped roof on the adjoining house, or a shared rear drain that backs up are all things Bob will look for, and knowing them in advance sharpens where he samples.
Mold Inspection & Testing in Philadelphia County from $275. Same inspector every time. Results in 2-3 days.
From the Field
From recent Philadelphia County inspections
Real findings Bob documented on Philadelphia County jobs. Your report gets this same level of photographic detail.
Every town Bob serves
Which Philadelphia County towns does Bob cover?
Bob personally handles mold testing in every Philadelphia County town listed here. Each has its own page with local detail on the housing stock and the moisture patterns that come with it.
- Mold testing in Philadelphia
- Mold testing in Chestnut Hill
- Mold testing in Germantown
- Mold testing in Manayunk
- Mold testing in Mt. Airy
- Mold testing in Northeast Philadelphia
- Mold testing in Roxborough
- Mold testing in Fishtown
- Mold testing in Northern Liberties
- Mold testing in Fairmount
- Mold testing in East Falls
- Mold testing in Bella Vista
- Mold testing in Graduate Hospital
- Mold testing in Queen Village
- Mold testing in Brewerytown
Looking for a different service in Philadelphia County? See air quality testing in Philadelphia County, or browse every area Bob serves.
Common questions
Philadelphia County mold testing questions
How much does mold testing cost in Philadelphia County?
Mold testing in Philadelphia County starts from $275, covering a walk-through, air sampling in one area, an outdoor control sample, and PRO-LAB certified lab analysis. More sampling areas cost more. There is no city surcharge.
How long does it take to get results?
Lab results come back in 2 to 3 days and Bob sends the written report the same day he receives them. Findings are in plain language with a repair cost range where one applies, and nothing gets buried in jargon.
Who performs the mold inspection?
Bob does, personally, in every Philadelphia neighborhood. The same inspector every time, with no rotating technicians and no subcontractors. The person who walked your basement is the person who writes your report.
My neighbor's house is causing my mold. Can testing prove that?
Testing plus documentation can establish that the moisture is entering through the shared party wall rather than originating in your house, which is usually the point in dispute. Bob writes down what he found and where the water is tracking from. That written record is what a neighbor, a landlord, or an insurer responds to.
Do you test condos and apartments in Philadelphia?
Yes, and it is a large share of the city work. Bob documents both the finding and the likely source, which matters in a condo or rental because the source determines who is responsible. A third-party written report is usually what moves a board or a landlord to act.
Should I test before buying a Philadelphia row home?
It is worth it on any pre-1920 row home, especially with a flat roof or a vacant neighbor. Bob separates immediate safety concerns from routine maintenance so you can negotiate, accept, or walk with accurate information rather than a guess.
Is the mold in my basement from the old clay drain line?
It often is. Cracked clay and cast iron laterals wet the soil directly under the slab and produce persistent basement humidity that a dehumidifier cannot fix because the source never stops. Bob checks for this pattern specifically in older Philadelphia housing.
Do you also remove the mold you find?
No. All Seasons tests and reports only. A company that both tests and remediates has a financial reason to find a bigger problem than you have. Keeping those separate is the whole point.
Sources and further reading
Where the Philadelphia County figures on this page come from
- EPA Map of Radon Zones, Pennsylvania sheet, which assigns each county its zone designation: epa.gov/radon/epa-map-radon-zones
- US EPA radon guidance and the 4 pCi/L action level: epa.gov/radon
- Pennsylvania DEP Radon Division, state testing and mitigation requirements: dep.pa.gov Radon Division
- US EPA guidance on mold and on when sampling is appropriate: epa.gov/mold/mold-testing-or-sampling
The EPA is explicit that zone designation does not tell you what any individual house will read, and recommends testing regardless of zone. Findings described on this page are from All Seasons inspections in Philadelphia County.
How do I schedule mold testing in Philadelphia County?
Same-week appointments are normally available throughout Philadelphia County. Call Bob directly and he will tell you what your situation actually needs.
Serving Philadelphia, Montgomery, Bucks, Chester & Delaware Counties. All major credit cards accepted.