Best Mold Testing Services in Dallas for Homes and Commercial Buildings

Dallas summers bring heat and heavy humidity, often pushing moisture levels past 60% for weeks at a time. This climate creates perfect conditions for mold growth inside homes and commercial buildings, especially after plumbing leaks, roof damage, or HVAC condensation problems. Texas law protects property owners by requiring all mold inspectors to hold an active TDLR Mold Assessment Consultant (MAC) license. The law also prevents the same person from testing and remediating on a single project. This makes checking credentials your most important first step. The Dallas market includes both testing-only specialists and full-service companies. You'll find small local operators and national environmental platforms with multi-discipline teams. This guide covers 5 top mold testing services in Dallas for homes and commercial buildings in 2026, verified through TDLR licensing records and confirmed service information.

How to Select Top Mold Testing Services in Dallas

We conducted this research in early 2026 using TDLR licensing records, published credentials, official company websites, and confirmed service data. Each company was evaluated against five criteria that matter most to property owners seeking mold testing services for Dallas homes and commercial buildings.

Selection Criteria:

• TDLR MAC licensing: Only companies whose inspectors hold an active Texas Department of Licensing and Regulation Mold Assessment Consultant (MAC) license were included, since this is the legal requirement for conducting mold inspections in Texas.

• Independent laboratory analysis: Companies sending samples to independently accredited or TDLR-licensed third-party laboratories were prioritized over those doing in-house analysis, because independent lab results are science-based and legally defensible.

• Residential and commercial coverage: Providers able to serve both residential and commercial properties were favored, since Dallas property owners often need testing across different building types.

• Post-remediation clearance testing: Companies offering clearance testing after remediation and the ability to issue a Certificate of Mold Damage Remediation (CMDR) were weighted higher, because clearance is required under Texas law for property sales following remediation within five years.

• Turnaround time and report quality: Providers delivering written reports with findings, photographs, lab results, and remediation protocols within clear timeframes were preferred, since actionable documentation is what makes a mold inspection practically useful.

List of Best Mold Testing Services in Dallas for Homes and Commercial Buildings

Here are the five Dallas mold testing services profiled in this guide:

1. Mold Testing and Removal
2. Mold Test DFW
3. O2 Mold Testing
4. GreenWorks Inspections
5. DCG Environmental

Best Mold Testing Services in Dallas for Homes and Commercial Buildings

1. Mold Testing and Removal

• Location: The company operates from 2031 John West Rd., Suite #119, Dallas, TX 75228, under its parent company 24/7 Water Damage Restoration since 2009.
• Certifications: The team holds IICRC Water Damage certification and NATEC Mold Technician credentials.
• Testing method: Air and surface samples are collected on site and sent to accredited third-party laboratories alongside thermal imaging and moisture detection.
• Full-cycle service: This company manages the complete process from mold inspection through HEPA containment removal to post-remediation clearance verification.
• Availability: 24/7 emergency response is available with same-day appointment scheduling for urgent mold situations in residential and commercial properties.

Company Overview: Operating since 2009 under parent company 24/7 Water Damage Restoration, this Dallas firm is headquartered at 2031 John West Rd., Suite #119, Dallas, TX 75228. The team brings IICRC water damage certification and NATEC mold technician credentials to every project. All collected samples go to accredited third-party labs for analysis. This is one of only a few Dallas providers handling testing, HEPA-filtered removal, and post-clearance verification under one roof. Property owners needing a single coordinated response around the clock will find this service model helpful.

Best For: Dallas homeowners and commercial property owners who need a single provider managing the full mold process (testing, HEPA removal, and post-clearance) available 24/7 with same-day scheduling.

Standout Feature: Full-cycle mold management from inspection through HEPA containment removal to post-remediation clearance, available 24 hours a day with same-day scheduling for urgent residential and commercial situations.

2. Mold Test DFW

• Licensing: All inspectors are TDLR-licensed Mold Assessment Consultants (MAC) carrying full liability insurance and meeting ongoing education requirements.
• Testing only: The company does not perform remediation, ensuring independent, conflict-free findings with no financial interest in recommending unnecessary work.
• Inspection scope: Visual inspection, moisture analysis, and both air and surface sampling are conducted; inspections typically take up to one hour for homes up to 3,200 sq ft.
• Real estate specialization: The company works directly with realtors and home inspectors, delivering written reports with remediation cost estimates for buyers and sellers.
• Services: Mold inspection, air and surface sampling, moisture intrusion assessment, remediation protocols, and post-remediation clearance testing for residential and commercial properties across the DFW Metroplex.

Company Overview: Mold Test DFW covers the Dallas-Fort Worth Metroplex with TDLR-licensed, fully insured inspectors who complete ongoing education requirements. The company does not perform remediation, so its assessments remain fully independent. Inspections include visual review, moisture analysis, and collection of air and surface samples. Standard home inspections (up to 3,200 sq ft) take about an hour. The company has built a reputation in real estate circles, working directly with agents and home inspectors to produce written reports that include remediation cost estimates.

Best For: Dallas-Fort Worth homebuyers, sellers, realtors, and home inspectors who need fast, conflict-free mold assessments with written reports and remediation cost estimates to support property transactions.

Standout Feature: A real estate-oriented testing approach with TDLR-licensed inspectors who coordinate directly with realtors and home inspectors, delivering written reports with remediation cost estimates to streamline pre-sale and pre-purchase decisions.

3. O2 Mold Testing

• Founded: O2 Mold Testing was established in 2005 in Reston, VA, and now operates nationally including Dallas-Fort Worth; it is operated by Green Cleaning Systems, Inc.
• Credentials: The team includes Certified Microbial Investigators (CMI), Indoor Air Quality Association (IAQA) members, IICRC-certified Building Moisture Inspectors (BMI), and ACAC-accredited professionals.
• Dallas location: The Dallas operation dispatches from Hi Line Dr, Dallas, TX 75207, and covers DFW including Frisco, Irving, Garland, Plano, McKinney, Allen, and surrounding communities.
• Services: Air sampling, surface sampling, moisture and leak detection, visual mold inspection, mold remediation protocol writing, and post-remediation clearance testing; testing only (remediation by certified third-party contractors).
• Turnaround: Standard results are available within 5 business days; rush service returns results in 24-48 hours (additional fee applies for up to 5 samples: $150; more than 5 samples: $225).

Company Overview: O2 Mold Testing started in 2005 in Reston, VA and now operates a national network including Dallas-Fort Worth under Green Cleaning Systems, Inc. The Dallas team dispatches from Hi Line Dr, Dallas, TX 75207. Credentials include CMI, IAQA, IICRC BMI, and ACAC designations. All samples go to independent laboratories. Remediation is performed separately by certified contractors to prevent conflicts of interest. Standard results arrive within 5 business days. Rush results are available in 24-48 hours.

Best For: Dallas residential and commercial property owners who need a nationally credentialed, testing-only mold inspection service with flexible turnaround options including rush results in 24-48 hours.

Standout Feature: A national network of CMI, IAQA, IICRC, and ACAC-credentialed specialists with a rush service option returning results in 24-48 hours, one of the fastest standard turnaround options available from a credentialed mold testing provider in the DFW area.

4. GreenWorks Inspections

• Founded: GreenWorks was founded in 2009 in Dallas as a woman-owned small business; address: 3626 N Hall St, Suite 610, Dallas, TX 75219; A+ BBB rating; Inc. 5000 Fastest Growing Private Company award recipient.
• Scale: The company has 175+ accredited inspectors and conducts 2,400+ monthly inspections across Texas, serving Dallas, Ellis, Kaufman, and Rockwall Counties.
• Credentials: All inspectors are InterNACHI- and ASHI-certified and TDLR-compliant; the company includes licensed Mold Assessment Consultants (MAC) on the team.
• Mold services: Full-scope mold testing includes sample collection, certified laboratory analysis (results within 3 business days), mold protocol writing, clearance inspections, and CMDR issuance.
• Additional testing: Environmental testing also covers asbestos, radon, lead-based paint, indoor air quality, and water quality, making GreenWorks a multi-discipline environmental testing option.

Company Overview: GreenWorks Inspections launched in Dallas in 2009 as a woman-owned business, now operating from 3626 N Hall St, Suite 610 with over 175 accredited inspectors completing more than 2,400 monthly inspections. The company holds an A+ BBB rating and earned a spot on the Inc. 5000 Fastest Growing Private Companies list. Mold services include testing, protocol writing, clearance inspections, and CMDR issuance, with lab results within 3 business days. The multi-discipline team also handles asbestos, radon, lead, IAQ, and water quality testing.

Best For: Dallas homeowners and commercial property owners who want a large, woman-owned, multi-discipline inspection company offering mold testing alongside asbestos, radon, and IAQ testing with A+ BBB credentials and 7-day availability.

Standout Feature: 175+ accredited inspectors conducting 2,400+ monthly inspections under an A+ BBB rating and an Inc. 5000 award, a Dallas-founded, woman-owned multi-discipline firm covering mold, asbestos, radon, and IAQ testing all under one roof.

5. DCG Environmental

• Founded: DCG Environmental was founded in 2016 by a husband-and-wife team; Dallas Division corporate office: 211 W Pleasant Run Rd, Suite 111, Lancaster, TX 75146; additional offices in Killeen and Houston.
• Team model: All inspectors are full-time salaried employees, not commission-based contractors, licensed under TDLR for mold, asbestos, and lead assessment.
• Turnaround: DCG is on-site within 24-48 hours of contact and delivers lab results within 24-36 hours of sample collection, with full written reports in 2-3 business days.
• Testing only: The company performs no remediation work, operating as a fully independent assessment firm with no financial interest in the outcome of its findings.
• Services: Mold inspection and air quality testing, asbestos survey and inspection, lead testing, VOC and allergen testing, LEED documentation support; residential, commercial, and industrial properties across Texas.

Company Overview: DCG Environmental was started in 2016 by a husband-and-wife team, with its Dallas Division office at 211 W Pleasant Run Rd, Suite 111, Lancaster, TX 75146. All inspectors are full-time salaried employees (not commission contractors) holding multi-discipline TDLR licenses across mold, asbestos, and lead. The company does no remediation and carries a 5.0/5 HomeAdvisor rating. They arrive on-site within 24-48 hours. Lab results come back within 24-36 hours of sampling. Full reports are ready in 2-3 business days.

Best For: Dallas contractors, developers, facility managers, and property owners who need a multi-discipline, fast-turnaround testing-only firm covering mold, asbestos, and lead under a single salaried, licensed team.

Standout Feature: Salaried, multi-licensed inspectors across three Texas offices with no commission contractors, no remediation upsell, on-site scheduling in 24-48 hours, and lab results within 24-36 hours of sample collection.

Factors to Consider When Choosing a Mold Testing Service in Dallas

Verify TDLR MAC Licensing Before Any Inspection

Conducting a mold inspection without an active TDLR Mold Assessment Consultant (MAC) license is illegal in Texas. Always verify the company's license status on the TDLR website before booking, since unlicensed reports are legally worthless and potentially fraudulent.

Ask Whether the Company Also Does Remediation

Companies offering both testing and remediation have a financial incentive to find problems. If an objective, unbiased result is your priority, a testing-only firm removes that conflict entirely.

Confirm Where Samples Are Sent

Some companies self-analyze samples rather than using independent accredited laboratories. Always ask where your samples are sent and confirm the lab is independently accredited, because in-house analysis is not legally defensible in Texas.

Clarify Report Turnaround and What the Report Includes

Report turnaround ranges from 24 hours to several days depending on the provider. Confirm in advance whether your written report will include lab results, photos, a remediation protocol, and the specific mold species identified.

Check Whether Clearance Testing and CMDR Issuance Are Available

If your property has already had mold remediated, confirm whether your chosen company can perform post-remediation clearance testing and issue a Certificate of Mold Damage Remediation (CMDR). Texas law requires you to disclose this document to buyers if selling within five years of remediation.

Final Thoughts

Before booking mold testing in Dallas, the single most important action you can take is confirming a valid TDLR MAC license on the TDLR website. This takes under two minutes and ensures the inspection is legally valid and the report is defensible. Ask every company upfront whether samples go to an independent laboratory, what the written report includes, and how long turnaround takes. The answers will quickly separate serious operators from those with minimal process. If you're buying, selling, or managing a commercial property, also confirm whether the company can issue a Certificate of Mold Damage Remediation. This is a legally significant document under Texas property disclosure law.