Not affiliated with, endorsed by, or sponsored by the Michigan Department of Licensing and Regulatory Affairs (LARA), its Bureau of Construction Codes, the Residential Builders' and Maintenance & Alteration Contractors' Board, or PSI Services LLC. Those names are used only to describe the examination this site prepares candidates for. All practice questions are original, written by us from Michigan statutes, administrative rules and the published exam content outline — they are not actual exam questions. This site is not a substitute for the official code books or PSI's Candidate Information Bulletin.

Michigan Residential Builder Licence Examination

Practice built from the law, not from someone's memory of a test.

Plumb Line Prep is being built for candidates sitting the Michigan Residential Builder licence examination. Every question is written from scratch against Michigan statutes, administrative rules and the published exam content outline, and every one carries the citation it rests on, with the code edition named.

Opening soon. The first free question set is being written to the published content outline. It is not open yet, and nothing on this page is a practice question.

Get told when it opens

What the exam actually is

Always confirm the current fee, appointment process and reference list in PSI's Candidate Information Bulletin for this examination, and the licence requirements with the Bureau directly. This site is preparation, not a substitute for either.

How the questions are written

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Frequently asked questions

Is this a question bank I can use right now?
Not yet. The first free question set is being written to the published exam content outline and is not open. Nothing on this site is a practice question today. Join the list and you will get one message when it opens.
Where do the questions come from?
They are written from scratch against Michigan statutes, the Michigan administrative rules that amend the residential code, and the published content outline for the examination. Each one carries the citation it rests on and the code edition it was written against. Nothing here is recalled from a real examination, and we do not accept exam recollections from anyone who has sat one.
Which edition of the residential code applies?
Michigan's residential code is currently the 2015 edition as Michigan amended it. The 2021 update has been paused in the courts, so a candidate studying today is examined against the 2015 code. That is why every question is tagged with the edition it was written against, and why a question is rewritten rather than quietly re-used when an edition changes.
What happens when the code book and the rule disagree?
It happens, and on at least one section it does. The state-designated code book is a printing frozen at its publication date, while the administrative rules keep moving, so the book can be stale as to the law. Where the two conflict and the state has issued no correction, we do not pick a side and key a question to it. That question is withheld until the conflict is resolved, and we say so rather than guessing.
Will this tell me whether I am ready to sit the exam?
Not today, and we will not pretend otherwise. A readiness estimate is only meaningful with enough answered questions behind it to support a confidence range, and we have none yet. When readiness analytics arrive they will show the basis and the sample size alongside the number.
Do you sell exam questions or answer keys?
No, and we would not. Material marketed as real examination content is exactly what we refuse to traffic in, on principle and because it is how candidates get their scores cancelled. Everything here is original work traceable to public law.