AHJ Radar · Free preview
Preview your building
Type the address, answer a few questions about the building, and see which authorities have jurisdiction over it, which published requirements are listed for a building like it (with the official citation for each), and what is dated inside the next twelve months. Information for your own research; nothing is stored unless you ask us to email you.
1. Where is the building?
Is this the address? Pick the one that matches, or correct the address and look it up again.
Not the right place? Pick the state and county yourself
With the state and county only, the preview shows the federal and state layers and any county overlay we have on file. It cannot tell which city enforces the code at that address.
The address is sent to the U.S. Census Bureau's geocoder through our server to find the state, county and city. We do not keep it.
Who has authority: federal, then state, then local
What is dated in the next twelve months, for a building like this
What changed, in this building\u2019s scope
Two sources: items on the radar with a recorded before and after (an adopted edition, a moved date, a new filing), and the changes to this state\u2019s record since it reached its current form, both limited to the layers over this address and to the facts you entered.
The requirements listed for a building like this
How recently our monitor read this state's official pages
Email me when something here changes
The Monday issue for your state, one rule explained on Thursdays, and a heads-up the day an authority with jurisdiction here publishes something a building team may need to check. Never more than three emails a week. One click to leave. We can miss things; the official source always governs.
We send a confirmation first and nothing else until you confirm. We keep your state and county with the address line removed. Privacy · Terms
AHJ Radar™ is a trademark of Mason Mathews Facility Assurance, LLC. Official sources read daily since September 2026; every entry names its source. Content and compilations © 2026 Mason Mathews Facility Assurance, LLC, for personal and internal use under the Terms of Use; no redistribution or resale.
Information only. This preview lists requirements by rule and jurisdiction from the facts you entered; it is not legal, engineering or inspection advice, not a statement that any building is or is not in compliance, and not a complete list of everything that applies. Confirm every requirement and date with your authority having jurisdiction and your licensed professionals. Mason Mathews Facility Assurance, LLC · Terms of Use · Privacy · state records · Citation Decoder · how our monitor reads sources.