Most Lewisville homeowners don’t think about mold removal cost until they’re already staring at a dark patch spreading across drywall or smelling something musty behind a cabinet. The number you get from a contractor depends on how much mold is present, where it’s growing, and what materials are affected. We’ve been handling mold remediation across Lewisville and the surrounding communities since 2009, and we’ll give you real numbers here so you know what to expect before you make a single call.
Get a straight answer on what your mold job will cost. No runaround, no fine print.
Key Takeaways
- Mold removal cost in Lewisville typically ranges from $500 for a small isolated area to over $10,000 for whole-house remediation.
- Where the mold is growing matters as much as how much there is. Crawl spaces, HVAC systems, and inside walls cost more to treat.
- Mold inspection and testing are separate costs, usually $200 to $600, and are worth doing before remediation begins.
- Homeowners insurance may cover remediation if the mold traces back to a covered water loss, but the fine print varies by policy.
- Catching mold early, before it spreads to structural materials, is the single biggest factor in keeping remediation costs down.
What Does Mold Removal Cost on Average in Lewisville?
The most common range Lewisville homeowners pay is $1,200 to $3,750 for professional mold remediation. That is the median band for a typical job. Small, isolated cleanups can start as low as $300, while whole-house contamination can climb well past $10,000. Scope drives the number more than anything else. A slow drip under a bathroom sink is a very different job than attic mold from a roof leak or whole-house contamination after a flood.
Professional mold remediation in Lewisville typically runs $10 to $25 per square foot for labor and materials. That figure covers containment, removal, treatment, and clearance testing. What you actually pay depends on where the mold is, how far it has spread, and whether structural materials like drywall or subfloor need to come out.
| Job Size | Typical Area | Cost Range | Timeline |
|---|---|---|---|
| Small | Single wall, cabinet, or bathroom | $300 to $1,500 | 1 day |
| Mid-Range | Subfloor, crawl space, or HVAC system | $1,500 to $5,000 | 2 to 4 days |
| Large | Attic, flood damage, or whole house | $10,000 to $30,000+ | 1 to 3 weeks |
Not sure which category your job falls into? Get a free on-site assessment and a clear scope before you commit to anything.
Small Jobs: Surface Mold on a Single Wall, Cabinet, or Bathroom
Small jobs run $300 to $1,500 and typically wrap up in a single day. The most common trigger we see in older Castle Hills and Old Town Lewisville homes is a slow drip under a kitchen or bathroom sink that goes unnoticed for weeks. Surface mold on tile grout, a cabinet interior, or a small section of drywall falls into this category. Catch it early and the cost stays manageable.
Mid-Range Jobs: Subfloor, Crawl Space, or HVAC Mold
Mid-range jobs run $1,500 to $5,000 and often require drywall removal to reach mold growing inside wall cavities or below flooring. Crawl space mold is especially common in pier-and-beam homes built before 1990 that lack modern vapor barriers. HVAC mold is another frequent mid-range job because spores spread through ductwork and affect multiple rooms at once.
Large Jobs: Attic Mold, Flood Damage, or Whole-House Contamination
Large jobs start around $10,000 and can exceed $30,000 for whole-house contamination. Attic mold from an undetected roof leak is one of the most expensive scenarios we handle. Flood-related mold often requires pack-out and content cleaning in addition to structural remediation, and some families need temporary relocation while work is completed. These are real costs that deserve a real estimate before any work begins.
Mold Remediation Cost by Room: Where It Hits Hardest in Lewisville Homes
Not all mold jobs cost the same, and the room matters as much as the square footage. The materials involved, how long moisture sat, and how accessible the affected area is all push the price up or down. Here is what you can expect room by room in a typical Lewisville home.
| Room / Area | Typical Cost Range |
|---|---|
| Bathroom or Kitchen | $500 to $2,500 |
| Attic | $1,500 to $9,000 |
| Crawl Space / Under-Floor | $500 to $4,000 |
| HVAC System and Air Ducts | $3,000 to $10,000+ |
Bathroom and Kitchen Mold
Bathroom and kitchen mold removal typically runs $500 to $2,500. The spread depends on whether the mold is limited to grout and caulk or has worked its way into drywall and subfloor. Failed caulk around tubs and sinks is the most common entry point we see. Water sits, grout cracks, and mold follows. If the drywall behind the tile is saturated, that material has to come out before remediation can start, which adds time and cost. This is where small plumbing leaks cause major mold problems in DFW homes more often than most homeowners realize, and bathrooms are where we see it first.
Attic Mold
Attic mold removal costs $1,500 to $9,000, and that range reflects how fast attic mold spreads. Local summers push attic temperatures past 140 degrees. When roof ventilation fails or a shingle lets moisture in, that heat and humidity become a perfect mold environment. Treating attic mold often means fogging, wire-brushing or sanding roof decking, and applying an encapsulant to the wood. If the decking is compromised, you may also need a licensed Lewisville roofer before remediation is complete. Attic jobs cost more because the scope is larger and access is harder.
Crawl Space and Under-Floor Mold
Crawl space mold removal runs $500 to $4,000. Pier-and-beam homes in ZIP codes 75057 and 75067 are frequent candidates. The clay-heavy soil in this part of the region retains moisture and wicks it upward into crawl spaces during wet seasons. Without a proper vapor barrier, that moisture reaches the floor joists and subfloor. Once wood framing starts growing mold, structural damage is not far behind. The older homes around the Timber Creek corridor were largely built before vapor barriers were standard, and a common scenario we run into there is a crawl space with no ground cover at all, where standing moisture after spring rains feeds mold along the joists. Learn more about foundation moisture and clay soil in North Texas and how it contributes to under-floor mold.
HVAC System and Air Duct Mold
HVAC and air duct mold remediation is the most expensive category, often $3,000 to $10,000 or more. The reason is simple. Every time your system runs, it pushes air through every room in the house. If mold is growing inside the ducts or on the air handler coil, your family breathes those spores around the clock. Remediation requires isolating the system, cleaning or replacing duct sections, and treating the source of moisture that allowed mold to establish in the first place. This is not a job where cutting corners makes sense. Our Lewisville mold remediation services address the HVAC system as part of a full-scope assessment, not as an afterthought.
What Drives Mold Remediation Costs Up in Lewisville Homes?
Two jobs can look identical on paper, same room, same square footage, and come in at completely different prices. That gap usually traces back to four things: how long the moisture sat, what species of mold grew, what materials it got into, and whether testing was part of the scope. Understanding these factors helps you ask the right questions before you get a quote.
How Long the Moisture Was There
Time is the single biggest cost driver in any mold job. A slow leak caught within 48 hours is typically a contained cleanup. That same leak ignored for three weeks can mean full drywall removal, subfloor replacement, and framing repairs. Mold doubles its colony size fast in local humidity, especially in older pier-and-beam homes where crawl spaces trap moisture year-round.
Waiting also turns a surface problem into a structural one. Once mold penetrates drywall paper and reaches wood framing, you are no longer cleaning, you are rebuilding. That is where costs jump from hundreds to thousands. If you suspect a slow leak, read after the plumber leaves: the crucial next step in water damage mitigation before assuming the problem is solved.
Type of Mold Identified
Not all mold costs the same to remove. Cladosporium and Penicillium are the most common species in local homes and typically respond to standard remediation protocols. Stachybotrys chartarum, black mold, is a different story. It requires negative air pressure containment, full personal protective equipment, and more aggressive removal procedures. Those extra steps add real money to the final invoice.
Black mold also tends to grow deeper into porous materials, which means more demolition. If a lab test confirms Stachybotrys, expect the remediation cost to run toward the higher end of any estimate range you receive.
Structural Materials Affected
Mold on tile or metal can usually be cleaned in place. Mold inside drywall, insulation, or wood framing cannot. Porous materials must be physically cut out and replaced, that is demolition labor, disposal fees, and reconstruction costs stacked on top of the remediation itself. Pre-1990 homes in Denton County often have older drywall and minimal vapor barriers, which makes them more likely to need full material removal once mold takes hold.
Our remediation process always starts with a scope assessment so you know exactly what materials are affected before work begins.
Testing and Clearance Inspection Fees
Testing is a separate line item from remediation. Air quality testing in the local market typically runs $200 to $600 depending on the number of samples. Post-remediation clearance testing, which confirms the mold count is back to normal levels, adds another $150 to $300. These are not optional if you want documentation for an insurance claim or a future home sale.
Our team handles both the remediation and the inspection coordination, so you are not managing multiple contractors. For background on how mold starts before it becomes a visible problem, see why small plumbing leaks cause major mold problems in DFW.
Worried about insurance coverage? Let’s walk through your policy together before you file, so you know exactly what your adjuster should owe.
Does Homeowners Insurance Cover Mold Removal in Lewisville?
The short answer is: sometimes. Whether your policy pays for mold remediation cost depends almost entirely on what caused the mold in the first place. Texas homeowners policies are written around one key phrase: sudden and accidental. If the moisture source qualifies, you likely have coverage. If it doesn’t, you’re paying out of pocket.
When Insurance Pays for Mold Remediation
Standard Texas homeowners policies typically cover mold remediation when it results directly from a covered peril. A burst pipe, a failed water heater, or storm-driven water intrusion through a damaged roof are common examples. The mold has to be a direct consequence of that event, not something that developed over months. If you’ve had ceiling water stains or noticed a musty smell after a pipe failure, your adjuster will want to trace the mold back to that specific incident.
If your home near the FM 407 corridor or the Lewisville Lake drainage area flooded during a heavy spring rain event, that’s a different story. Ground flooding requires a separate flood insurance policy, typically through FEMA’s National Flood Insurance Program. Your standard homeowners policy won’t touch it. If you’ve dealt with rising water, our flood cleanup page covers what that process actually looks like.
When Insurance Does Not Pay
Slow leaks are the most common reason claims get denied. If an adjuster determines the moisture source was a gradual drip you could have caught and fixed, the policy treats it as a maintenance failure, not a covered event. Hidden drips create major mold damage precisely because homeowners don’t notice them until the damage is extensive. By then, the insurer often argues the homeowner had reasonable opportunity to act.
How to Document Your Claim
Before any work begins, photograph the mold and the moisture source from multiple angles. Write down the date you first noticed the problem. Get a written scope of work and an itemized estimate from your contractor. Our IICRC-certified team provides documentation in the format insurance adjusters expect, including moisture readings, affected area measurements, and cause-of-loss notes. That paperwork matters. Understanding what your policy actually covers before you file is also worth your time. Our guide on actual cash value vs replacement cost for Lewisville homeowners explains how your payout method affects what you actually recover.
Not sure if your mold damage is covered? Call us at (214) 731-4624 and we’ll walk you through what your policy likely owes you before you file a single form.
Why Lewisville Homes Are Especially Vulnerable to Mold
If your home seems to collect moisture problems no matter what you do, the ground beneath it is a big part of the reason. Lewisville sits on some of the most expansive clay soil in the region. That clay swells when it rains and shrinks when it dries out. The constant movement stresses your foundation slab, opens micro-gaps along walls and floor edges, and gives moisture a direct path inside. Older neighborhoods built in the 1980s and early 1990s, including areas near Old Town and the Timber Creek corridor, often have no modern vapor barriers to stop what comes in next.
Clay Soil, Humidity, and Foundation Movement
Spring storms dump rain fast. Summer heat pulls moisture back out of the ground just as quickly. That cycle repeats every year in ZIP codes 75057 and 75067, and your foundation takes the stress each time. Pier-and-beam homes have crawl spaces that trap humid air with nowhere to go. Slab homes get moisture wicking up through hairline cracks. Either way, the conditions are almost ideal for mold growth. Our article on foundation moisture and clay soil in North Texas covers the mechanics in detail if you want to understand what’s happening under your floor.
Local humidity between April and September sits high enough that any dark, damp cavity behind drywall or under subfloor can grow visible mold within 24 to 72 hours of a moisture event. That is not an exaggeration. It is what we see on job sites across the area.
Flood Events and Sewage Backups Near Lewisville Lake
Homes near Lewisville Lake and the low-lying drainage corridors along Valley Ridge Boulevard and the FM 407 corridor face a separate risk. During heavy spring rain, those corridors back up fast. Floodwater carries bacteria, sediment, and organic material into crawl spaces and wall cavities. Sewage backups are even worse. Mold can establish itself within 24 to 48 hours of either event.
Speed is everything after a flood. Our team responds within 60 minutes, 24 hours a day, 365 days a year. A fast response to water intrusion is the single most effective way to keep a flood call from turning into a full remediation project. If your home took on water near the lake or a drainage corridor, do not wait to call.
DIY vs. Professional Mold Removal: What the Cost Difference Actually Means
You can save money doing some mold removal yourself. But the word “some” is doing a lot of work in that sentence. The EPA draws a hard line at 10 square feet. Below that threshold, on non-porous surfaces like tile grout or a small painted drywall patch, a proper N95 mask, gloves, eye protection, and an EPA-registered fungicide can get the job done. Beyond that line, DIY typically spreads spores rather than eliminates them.
What DIY Can and Cannot Handle
Surface mold on tile, glass, or metal responds reasonably well to DIY treatment if you catch it early. Bleach and a sponge is not the answer, though. Bleach kills surface mold but does not penetrate porous materials, and it leaves moisture behind that feeds regrowth.
Mold inside walls, under floors, or inside an HVAC system is a different problem entirely. Homes in the 75057 and 75067 ZIP codes with pier-and-beam construction are especially prone to under-floor mold in crawl spaces. Disturbing that growth without proper containment pushes spores through the whole house. That turns a $500 job into a $5,000 job fast. Once you understand how quickly a hidden drip escalates, the case for professional containment makes itself.
What Professional Mold Remediation Actually Includes
IICRC-certified remediation is not just cleaning. Our team seals off the affected area with plastic sheeting and runs negative air pressure so spores cannot migrate. We use HEPA air filtration, physically remove contaminated porous materials, apply antimicrobial treatment, and verify the work with post-remediation clearance testing.
We have been doing this work since 2009 out of our office at 824 Office Park Circle #100 in Lewisville. Customers consistently tell us they appreciated having the process explained clearly and seeing the right equipment used from the start. For full details on what the process covers, see our mold remediation service page.
Frequently Asked Questions
How much does mold removal cost in a small bathroom?
Most small bathroom jobs in the DFW area run between $500 and $2,000. If the mold is surface-level on tile grout or caulk, you’re toward the low end. If it has reached the subfloor or wall framing behind the shower, expect costs to climb and the timeline to stretch by a few days.
Does homeowners insurance in Texas cover mold remediation?
Texas policies typically cover mold that results from a sudden, covered water event like a burst pipe. They do not cover mold from slow leaks you ignored, ground flooding, or routine humidity. Read your declarations page carefully. Our post on what your declarations page actually tells you breaks this down in plain language.
How long does mold remediation take?
Small jobs take one to three days. Mid-range jobs with drywall removal run three to seven days. Large whole-house projects, including drywall replacement and clearance testing, can take two to four weeks.
What is the difference between mold removal and mold remediation?
“Mold removal” usually means wiping away visible mold without fixing the moisture source. It comes back. Full remediation follows the IICRC process: containment, material removal, treatment, drying, and verification testing to confirm the problem is actually gone.
Do I need a mold inspection before remediation starts?
If you can see mold and know the moisture source, a visual assessment by a certified technician is usually enough to start. If you smell mold but cannot find it, or a family member has unexplained respiratory symptoms, air quality testing runs $200 to $600 and is worth every dollar.
Will I get an upfront price before any work begins?
Yes. We provide a written, itemized estimate before any work starts. No surprise invoices. You know the full scope and cost before our crew touches anything.
If you found mold in your home and want a straight answer on what it will cost to fix it, call Regent Restoration at (214) 731-4624. Our team is at 824 Office Park Circle #100, Lewisville, TX 75057 and can be on-site within 60 minutes. We have been doing this work since 2009, and every estimate comes from an IICRC-certified technician who will give you a clear scope of work with no pressure and no fine print.
Ready to Get Started with Regent Restoration?
Call (214) 731-4624 to speak with our team directly. We’re ready to answer your questions, walk you through your options, and help you find the right solution for your needs. Whether you’re just starting to plan or ready to move forward, we’ll make the process simple and stress-free.
Reach out today and let’s talk about how we can help.
