Service area
Philadelphia Water Damage, Flooded Basement and Mold Restoration
Onyx works out of Philadelphia 19123 and handles water damage, flooded basements, mold, fire and storm losses for homes, apartment buildings and commercial properties across the city.
- IICRC certified
- 24/7 emergency response
- Insured
- 17 years in restoration
- Free estimates
- Works with your insurance
Philadelphia properties include rowhomes, twins, apartment buildings, older detached homes and commercial spaces. Water can move through basements, party walls, plaster, flooring and roof assemblies where surface drying does not reach it.
Onyx is based in the city. The crew handles mitigation, documentation and rebuild work, with equipment selected for the property's access and affected materials.
Areas we cover in Philadelphia
- Northern Liberties
- Fishtown
- Kensington
- Port Richmond
- South Philadelphia
- Germantown
- Manayunk
- Roxborough
- Northeast Philadelphia
- West Philadelphia
Northern Liberties, Fishtown and the river wards
Onyx is based in the 19123 ZIP code, so Northern Liberties, Fishtown, Kensington and Port Richmond are close to home. The housing here mixes older brick rowhomes, rowhomes with newly finished basements, new construction and apartments in converted industrial buildings.
Each brings its own water problems. Older rowhomes take water through stone or brick foundation walls and aging drain lines. Finished basements hide wet drywall, carpet and framing behind clean surfaces. Newer buildings and roof decks see leaks at windows, flashing and roof penetrations, and in a multi-unit building one leak can reach the units below.
Neighborhoods we serve
Onyx serves properties across the city. Common building types and loss concerns include:
- South Philadelphia: rowhome basements, sewer backups, older supply plumbing
- Fishtown, Kensington, Northern Liberties and Port Richmond: renovated rowhomes with finished basements and new construction with roof and window leaks
- Germantown: large older twins and singles with plaster, slate roofs and stone basements
- Manayunk and Roxborough: Schuylkill flooding and hillside water intrusion
- Northeast and West Philadelphia: twins and singles, apartment buildings, small commercial
The rowhome basement problem
Most Philadelphia water calls start in a basement. Rain overwhelms the sump or the drain, the sewer line backs up, or the water heater lets go. Because the basement shares walls with the neighbors, water that sits there is their problem too. Because it is below grade, it does not dry on its own, and by August a damp basement is a mold basement.
We extract, remove what is saturated, dry to the meter and, if you want, rebuild with materials that will handle the next storm.
Water damage restoration in Philadelphia
Burst pipes, water heater failures, roof and ceiling leaks. We extract the water, open what is saturated and dry the structure to the meter, then document it for your adjuster.
Flooded basement cleanup in Philadelphia
Heavy rain, sump pump failures and sewer backups. We pump out the basement, remove soaked materials, clean and sanitize where sewage was involved, and dry what stays.
Mold remediation in Philadelphia
Below-grade basements, party walls and bathrooms that stay damp grow mold. We find the moisture source, contain the area, remove the growth and dry the space so it does not come back.
Other services in Philadelphia
Every Onyx service is available across the city.
- Sewage backup cleanup
- Fire and smoke damage restoration
- Emergency response, board-up and roof tarping
- Storm and wind damage repair
- Rebuild and remodeling after a loss
- Commercial restoration for warehouses, stores, offices and venues
How it goes
What happens after you call.
Call
Describe what happened and where. We give you an arrival window and what to do until then.
Assess and document
Meter, photograph, write the scope. Your claim file starts on the first visit.
Mitigate and dry
Extraction, containment, demo and drying equipment sized to the space.
Rebuild
The same crew puts it back and matches the old finishes.
Proof
On the job






Onyx vehicles and crews on Philadelphia streets and residential jobs.
Google reviews
What customers say
5.0 from 7 Google reviews · Verified
★★★★★
Used Onyx to clean out mother in laws house after she passed. This was by [no] means a simple clear out. They did an absolutely amazing job! Job was finished when promised. I can’t say enough good things about the owner Jose and his team. Would definitely recommend this company.
★★★★★
Great experience with this mitigation company! Professional, reliable, and got the job done quickly. The team was friendly, respectful, and kept everything handled from start to finish. Highly recommend!
★★★★★
Overall, great experience with Onyx. I’ve used Jose as a lead on multiple multi-housing projects and have always found his pricing to be competitive. He gets the job done, is honest and trustworthy and knows how to lead a team. 10/10!
FAQ
Questions we get on this work
Do you serve all of Philadelphia?
Yes. Every neighborhood in the city. The list above is where we see the most calls, not a limit.
Do you work in rowhomes with tight access?
Yes. Tell us about narrow stairs, doorways or other access limits when you call so the crew can plan the equipment and work path.
Do you handle Philadelphia apartment buildings and landlords?
Yes. Multi-unit losses are handled unit by unit with one point of contact for the owner or manager, and documentation for each unit.
Do you work with my insurance?
We document the loss and work with your adjuster. Coverage decisions are your insurer's.
How fast can you get here?
Call and we will give you a real window based on where you are and what is happening. We do not print a minutes claim we cannot always keep.
Next step
Philadelphia-based. Call the local crew.
Free estimate. Insured. 17 years in restoration. (267) 353-7953.
Call (267) 353-7953Not an emergency? Request a callback online and Onyx will call to confirm a time.