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Inspecting For Safety. Inside and Out.

We specialize in commercial and residential inspections in relation to environmental hygiene. Concern for or discovery of an environmental related issue can be a stressful experience and often leaves a individual with many questions. Our priority is to offer a comprehensive consultation that provides our clients with a clear picture of what their specific situation means and how it should be addressed. With locations in Madison and Chicago, Keystone serves clients throughout Wisconsin and Illinois.


Priding itself on professional, low-cost, fast turn-around service, Keystone provides Phase I Environmental Site Assessments (ESAs), asbestos, mold, lead-based paint and other environmental hygiene related inspections for our clients.


All inspections are performed by an experienced and knowledgeable licensed professional who is careful to address your needs. 


For more information about Keystone's services, please select your appropriate interest below.

Considering purchasing a home or building?
Ensure future savings by having your potential home or building inspected for unseen environmental factors.



Keystone is dedicated to the principles that make great businesses great. Strong experience, ethical integrity, and maximum cost effectiveness are our top priorities. 

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