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National Inspection Services


For more than 40 years, National Inspection Services has provided fast, thorough commercial property inspections and reports. We are known for our ability to handle all types of commercial real estate inspections. For example, we provide commercial property condition assessments, environmental site assessments, and all ancillary commercial inspections and reports, such as indoor air quality inspections, asbestos inspections, lead inspections, radon inspections, and mold inspections. Likewise, we provide environmental consulting and environmental contracting.

As our name implies, commercial real estate inspection services nationally as well as regionally and locally. Headquartered in Colorado, and we’re the leading Colorado commercial property inspection company. Above all, National Inspection Services serve commercial real estate buyers, owners, developers, investors, government agencies, and Fortune 500 companies.

If you are looking for someone to inspect your commercial property,  we are here to help. Contact us today.

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Environmental Specialists

Because so many of our clients have environmental services needs, National Inspection Services has developed expertise in a broad range of environmental due diligence, inspection, testing, monitoring, and mitigation services.

In addition to Phase I through III environmental site assessments, we offer many types of environmental consulting and contracting. National Inspection Services invite you to learn more about our environmental services and contact us about your unique needs. Further, we would be happy to give you a fast, customized quote.  And if we aren’t the right service provider for your particular situation, we’ll refer you to other trusted firms.

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Our Capabilities

We provide all levels and types of environmental inspections, property conditions assessments, and litigation support. Anywhere a commercial real estate transaction takes place, National Inspection Services is there. We provide peace of mind for those buying, selling, or holding commercial real estate by providing timely, comprehensive inspections and inspection reports.

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National Inspection Articles

Do You Need a Construction Expert Witness?

Do You Need a Construction Expert Witness? What do they do? Because construction claims are so complicated and require particular skills, the use of an expert witness is almost mandatory. Most states and the federal government allow an expert witness to testify if that testimony is [...]

When Power Can Kill

The Hazards of Electromagnetic Radiation Overhead power lines. Hair dryers. Electric blankets. What's got everyone so worked up about these seemingly innocuous modern conveniences? Electromagnetic radiation, that's what. Produced naturally by the earth and technologically by man, electromagnetic radiation is everywhere around us--and always has been. [...]

Buyer Beware

Buyer Beware by William J. Warren President, National Inspection Services In recent years, the flagging economy has forced many who earn their living through real estate to seek out any building-related work they can get—even if they are not qualified. Nowhere is this more apparent than [...]

New Guidelines Promote Environmental Responsibility

The struggle to define environmental due diligence from a legal perspective continues unabated in our nation's courts. Due diligence is defined by ASTM's Standard Practice for Environmental Site Assessments: Phase I Environmental Site Assessment Process as whether one has conducted "all appropriate inquiry into the previous [...]

Water Pollution Down Under

The causes of groundwater contamination What is groundwater? Groundwater is simply water that has percolated down through the soil from melting snow and rain. Where it collects underground is the zone of saturation, the top of which is the water table. The collection formation is called [...]

Every (Working) Breath You Take

The risks of office air pollution Did you know that air within homes and other buildings can be more seriously polluted than outdoor air even in large, industrialized cities? Other research indicates that people spend about 90% of their time indoors. So, for most people, poor [...]

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