A kit includes hand-held sensors that are each configured to measure one or more of the healthy building parameters and a portable device that is configured to capture the measured current values of the one or more of the healthy building parameters that were measured using the hand-held sensors and to determine a healthy building score and one or more recommendations for improving the healthy building score of the building. The portable device is configured to output the healthy building score and the one or more recommendations for improving the healthy building score of the building via a user interface of the portable device.