Provider profile
TCB Enviro Corp
Provider snapshot
What this listing says
Northeast Florida homeowners from Jacksonville to Daytona Beach who want the owner — not a rotating crew — to personally handle their mold testing, remediation, and water damage restoration.
Best for
- Jacksonville, St. Augustine, and Ponte Vedra homeowners who want one person to handle testing through remediation and rebuild — Mark Mongon runs the entire process.
- Homeowners dealing with water damage and suspected mold who need fast turnaround — multiple reviewers report same-day or next-day inspections.
- Buyers in real estate transactions who need mold clearance on a tight inspection deadline — Lou G and others describe Mark accommodating weekend and rush schedules.
- Condo and rental property owners in Northeast Florida who need someone to explain findings in plain language and help navigate insurance claims.
- Commercial property owners — the company lists institutional clients including the U.S. Army Corps of Engineers and Flagler College.
About this company
TCB EnviroCorp is a family-owned mold and water damage company based in St. Augustine, Florida. Owner Mark Mongon personally handles every inspection and testing visit — you won't get handed off to a technician. The company holds three Florida licenses: mold assessor (MRSA55), mold remediator (MRSR789), and general contractor (CGC1519836). That combination means they can test for mold, remove it, and rebuild the damaged structure without subcontracting.
The standout detail is Mongon's background. He claims 35+ years in environmental industrial hygiene and construction project management, citing previous work on the World Trade Center, the Statue of Liberty, and Boston's Central Artery Tunnel. Previous institutional clients include the U.S. Army Corps of Engineers, U.S. National Park Service, U.S. Naval Command, Jacksonville Housing Authority, Flagler College, and Hilton Corporation. That resume is unusual for a small mold company in Northeast Florida. The website also mentions IICRC affiliation and lists thermal imaging, HEPA air scrubbers, moisture meters, and dehumidification among its equipment.
TCB EnviroCorp incorporated in 2009 and operates as a family business — reviews mention Mark's wife Jen as part of the operation. They advertise a $99 service call and apply the cost of mold testing toward remediation if the homeowner moves forward with the work. Hours are Monday through Friday 9am to 5pm, with weekend appointments available.
At 4.7 stars across 68 Google reviews with zero negative reviews in the recent 18-month window, the review profile is unusually clean. Nearly every review names Mark directly and describes a hands-on, educational experience rather than a transactional one.
Services
Service area
TCB EnviroCorp is headquartered in St. Augustine, Florida. They list service area pages for Jacksonville, Jacksonville Beach, St. Augustine, Ponte Vedra, Palm Coast, Middleburg, Daytona Beach, Gainesville, Orange Park, Nocatee, Palm Valley, St. Johns, and St. Augustine Beach. That covers a wide swath of Northeast Florida — roughly 150 miles from Gainesville to Daytona Beach — with a single-person operation based in St. Augustine.
Review consensus
Mark Mongon's name appears in the vast majority of reviews. Reviewers consistently describe three qualities: rapid responsiveness (same-day phone callbacks, next-day inspections), willingness to explain findings in detail without pressure to buy services, and honest pricing. Shane Gooden called Mark "communicative, transparent and fair." Austin Kanode, a Google Local Guide with 22 reviews, noted Mark "didn't try to sugar coat price and was fair and honest." Mercedes Emilia praised the urgency — Mark diagnosed her issue over the phone before arriving. Multiple reviewers describe Mark spending extended time on-site: Bradd Weinberg reported a 2+ hour inspection. Repeat business also shows up: Marcy Pryor returned for a second property. Several reviewers mention Mark helping with insurance navigation (Americode Tiktok 19, Faye Patin, Scott Stanley).
0 found across 68 total reviews at 4.7★. No negative reviews found in the 18-month recency window. Across 68 total reviews at 4.7 stars, there are no recent complaints to assess. The absence of recent negatives means there is no data on how TCB handles dissatisfied customers or what situations produce poor outcomes.
This is a true owner-operator business. Mark Mongon is named in nearly every single review — not as a manager or salesperson, but as the person who shows up, runs the equipment, writes the report, and takes the phone calls. That personal involvement likely explains the consistently positive feedback and the absence of the "great salesperson, bad field crew" split common in larger restoration companies. The tradeoff is scalability: this is one person doing everything.
Mark Mongon (owner, inspector, remediator — overwhelmingly positive across dozens of reviews). Rada (remediation crew — positive, mentioned by Matthew Norton for mold removal and repair). Jen (Mark's wife, operations — positive, mentioned by Dawn Fail for responsiveness and care).
Ask for Mark by name — he is the company. Confirm your testing report will come from an independent lab, not an in-house assessment, and get the written scope of work before agreeing to remediation. If your property is at the edge of their service area, verify response time for your specific city.
Keep in mind
- TCB EnviroCorp does both mold testing and mold remediation. That means the same company diagnosing the problem profits from fixing it. Ask for the lab report and consider getting a second opinion on the scope of work before committing to remediation.
- Mark Mongon personally handles every inspection, which is a strength — until scheduling conflicts arise. If he is booked, there is no backup inspector. Ask about current wait times before assuming same-day availability.
- The service area stretches from Gainesville to Daytona Beach, roughly 150 miles apart. Properties at the edges of that range may face longer response times or travel surcharges. Confirm logistics for your specific location.
- The company advertises a $99 service call and applies testing costs toward remediation. Clarify exactly what that $99 covers and whether additional testing fees apply before the visit.
- Weekend appointments are available only by arrangement — standard hours are weekday 9 to 5. If you have a weekend emergency, confirm availability and any after-hours pricing upfront.