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TRUSTED BY COLMA, CA HOMEOWNERS

  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon14
    Verified mold testing and remediation services reviews

Top-Rated Mold testing and remediation specialists in Colma - Updated Nov 2026

Avatar for Bio 911
Bio 911
4.9(
92
)
Mold & Toxic Material TestMold & Toxic Material Test - For Business

Serving Colma, CA and surrounding areas

Approved

In business since 2005

Free estimates

Emergency services offered

"Easy and fast communication. Business owner came out quickly per our request, and tested the air quality in an around our home, and did mold testing. He was speedy and kind; very informative of what he was doing and what he would be looking for. Gave us his thoughts and recommendations on what we saw visually, and then put the tests in to the laboratory same day. Results came back within 3 days. I highly recommend them for your mold and air testing needs!"
Mold under window
mold on concrete foundation
after treatment
after remediation
Hoarding cleanup

+18

Response time5 hrs
Response rate98%
1 neighbors recently requested a quote
Avatar for McCormick Home Builders, Inc.
McCormick Home Builders, Inc.
4.7(
42
)
Dry-rot, Water or Pest Damage - Major Repair

Serving Colma, CA and surrounding areas

Approved

In business since 2017

Free estimates

Customers say: True professional

"We hired McCormick Home Builders to remodel our living room, and we are beyond pleased with the result. The team was professional, worked efficiently, and Aris design ideas made a huge difference. The room feels so much brighter and more spacious. This was the best decision we made for our home, and we were already planning our next remodel with them."
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+1

Response time6 hrs
Recommended by17%of homeowners
Avatar for Quality Air Environmental Consulting, LLC
Quality Air Environmental Consulting, LLC
4.9(
10
)
Mold & Toxic Material Test - For Business

Serving Colma, CA and surrounding areas

Approved

In business since 2019

Free estimates

Customers say: Quality work

"Brad immediately called me back and was able to schedule an appointment within a few days. He was very knowledgeable about the potential of lead contamination in our old house. Great customer service and was very clean. I highly recommend!"
Asbestos Testing in skyscraper
Private Residence Floor Survey
Response time1 day
Recommended by100%of homeowners
Avatar for Ovation Restoration, LLC
Ovation Restoration, LLC
4.2(
102
)
Dry-rot, Water or Pest Damage - Major Repair

Serving Colma, CA and surrounding areas

Approved

In business since 1997

Free estimates

Emergency services offered

"We hired Ovation Restoration for a major home remodel, including adding a bathroom to the main floor, renovating three bathrooms, and installing a picture window in the family room. From start to finish, Ovation exceeded expectations with a clear, well-thought-out proposal, reasonable costs, and exceptional quality. The team, led by Juan and Chad, was professional, meticulous, and detail-oriented. Jessica ensured flawless material selection, ordering, and delivery with superb planning. Rick, the owner, provided excellent communication, accessibility, accountability, and flexibility, which made the process stress-free. The results were stunning and beyond our expectations. We’ve already recommended Ovation to friends—one has even signed a contract! We highly recommend Rick and the Ovation team for any remodeling project."
Breathtaking solid slab granite countertops
Walk-in shower with sliding glass door
Handicap accessible with style
New lighting
Antique white custom cabinets

+133

Response time10 hrs
Response rate96%
1 neighbors recently requested a quote
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Mold Testing and Remediation FAQs, answered by experts

In some cases, black stains on brick are caused by organic substances like algae and mold. However, it's more likely that the black spots you're noticing on your bricks come from carbon from vehicle exhaust or soot. Black stains can usually be removed by scrubbing the brick with a brush and masonry cleaner or power washing.

You can check your home's humidity in a few ways. A simple option is to use a hygrometer, which you can find at a hardware or big box store. Your smartphone may also have an app that can measure humidity. Modern thermostats, particularly smart thermostats, are also able to measure humidity levels.

Through air sampling devices and surface swabs in key areas of concern.

Pellet stoves burn compressed wood byproducts, making them very efficient and clean-burning. However, even efficient combustion still produces fine dust particles, which could have an effect on the health of vulnerable people in your household, such as infants and people with asthma. A wood stove pro can help determine whether the levels in your home are unsafe.

While a professional can always help, there are some common plumbing culprits you can check yourself to see if you can find the sewer gas smell. For example, you should check your water traps, sometimes called P-traps and S-traps, which are located under sink, shower, and laundry drains. The wax ring beneath the base of your toilet, which creates a watertight seal with the plumbing, could also have gone bad.

The Colma, CA homeowners’ guide to mold testing and remediation services

From average costs to expert advice, get all the answers you need to get your job done.