Certified by the International Association of Certified Home Inspectors

NJ Home Inspector Lic #: 24GI00106300
NJDEP Radon Lic #: MET12854
NJDEP 7B Wood Destroying Insects Lic #: 57970B



William is co-owner of Keystone Home Inspections of NJ and has performed over 400 Home Inspections during his time as a licensed Home Inspector. He has a comprehensive and broad based knowledge of all aspects of a home and its systems. He has served as a field mentor for Home Inspector Trainees, taking them along on inspections and teaching them how to properly perform home inspections, according to the New Jersey Standards of Practice. Furthermore, William brings 10 years of experience as a professional Firefighter, along with a working knowledge of building construction and common safety hazards within a home. This real world experience gives William and Keystone Home Inspections of NJ the edge over lesser experienced Home Inspectors.

William provides a personal touch with every inspection. As a loving father, he will discuss with you your long-term plans for the home, whether or not you have young children or are planning on having a family so that he can take that into account as he methodically goes through your future home, taking extra care to point out and discuss potential safety defects.

William is presently a member in good standing with the National Association of Certified Home Inspectors (NACHI) and their local chapter, NJ NACHI.

William is also registered with the New Jersey Department of Environmental Protection as a Radon Measurement Technician and a Commercial Certified Pesticide Applicator, in the Category 7B, Wood Destroying Insects
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Certified by the International Association of Certified Home Inspectors

Home inspector in livingston

​Dan Ernst

Keystone Home Inspections of NJ is owned and operated by William Roth and Dan Ernst.   If you are looking for a home inspection, call today to schedule!


​​William Roth

NJ ​Home Inspector Lic#:24GI00143600

​NJDEP Radon Lic#: MET13473

​NJDEP 7B Wood Destroying Insects Lic#: 58086B



Dan is co-owner of Keystone Home Inspections of NJ and brings a wealth of knowledge into every Home Inspection he performs.  He has over 20 years of experience in just about every aspect of home maintenance and construction - working as a carpenter, an electrician, a painter, and a  landscape installer.  This experience provides insight as to how things in a home go together.  Dan has also been a firefighter for the last 25 years, 19 of those professionally.  This experience provides insight as to what happens in a home when things go wrong and what NOT to do!

This unique skill set is applied as Dan systematically inspects your property.  From beginning to end he will answer any questions and concerns you may have in regards to your soon to be home.  Emphasis is placed on Safety. 

Dan is trustworthy, dependable, and a dedicated husband and father.  He has graduated from Inspection 21 School, is a registered Radon Measurement Technician, and licensed Category 7B Wood Destroying Insect Applicator with the New Jersey Department of Environmental Protection.