Renovation Standards

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Renovation Standards

January 22, 2026
mike@standardsmichigan.com

The key standards distinguishing building renovations (alterations, repairs, or rehabilitation) from new building construction primarily come from the model code stacks of the International Code Council, the National Fire Protection Association, ASHRAE International, Institute of Electrical and Electronic Engineers and the embedded product standards by ASTM International, Underwriters Laboratories and others we track routinely.

There are others, notably the FEMA “50 percent” rule informed by National Flood Insurance Program regulation applying to buildings in flood-prone areas. It governs renovation, repair, and improvement projects by defining “substantial improvement” or “substantial damage” as any work where costs equal or exceed 50% of the structure’s pre-improvement (or pre-damage) market value (excluding land value).

The “50 percent” rule does not exist in the Americans with Disabilities Act (ADA) regulations in the same way as FEMA’s flood-related 50% threshold for substantial improvement/damage. Instead, ADA alterations (under Title III for public accommodations and commercial facilities, and Title II for public entities) use a 20% disproportionate cost threshold for certain requirements.  
 
 
Sustainability objectives also shape the
scope of building renovation projects by expanding beyond basic repairs or cosmetic updates to encompass holistic, long-term performance improvements across environmental, economic, and social dimensions.  

 
 
Today at the usual hour we will scan stabilized standards and track changes in process where possible.  Use the login credentials at the upper right of our home page.

 

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