How to Get an Unrestricted Construction Supervisor License in Massachusetts

If you want to pull permits and supervise construction in Massachusetts, you need a Construction Supervisor License (CSL). Here's the full path to the unrestricted license, start to finish.

What an unrestricted CSL lets you do

An unrestricted CSL lets you supervise construction, reconstruction, alteration, repair, removal, or demolition of any work regulated by the code for buildings containing less than 35,000 cubic feet of enclosed space, plus one- and two-family dwellings and accessory buildings of any size. It's the license most residential and small-commercial builders need.

1 Register with the state and prove your experience

Before anything else, you apply to the state to register — and this is where they verify your work history, much like signing off an apprenticeship. You must document three years (36 months) of full-time experience in building construction or design. It doesn't have to be continuous, but it must add up to 36 months of full-time work (40 hours/week) within the past 10 years.

The state has to see and approve this experience before you're eligible to take the exam. Back it up with documentation — pay stubs, tax records, letters from employers or supervisors, permits — and gather it early. No approved application, no exam.

2 Get your code books and set them up

The exam is based on the 10th edition of the Massachusetts State Building Code. You'll need the approved reference materials per PSI's candidate bulletin, because the exam is open book and you bring your own books.

This is the step most people underestimate. The exam is broad and time-pressured — and the "open book" format is only an advantage if your books are actually ready to use. Tab the major sections, highlight key numbers, and organize your references so you can find anything in seconds. That preparation is more valuable than re-reading the code from cover to cover.

3 Register with PSI and schedule your exam

As of January 1, 2025, the CSL exam is administered by PSI. You register through PSI, schedule at a test center, and pay the exam fee. Budget roughly $100 for the exam — confirm the current fee when you register, as it can change.

4 Pass the exam

The exam is 75 questions, 3 hours, open book, 70% to pass. Show up with your tabbed, highlighted reference books and acceptable photo ID. See our format and rules guide for exactly what to expect.

5 Mail in your pass slip to get licensed

Passing doesn't automatically hand you the license. You get a pass slip at the test center, and you have to mail it in with a photo and the license fee (confirm the current amount online). Once the state processes it, they issue your license digitally. After that, keep an eye on your renewal — it's handled online and comes with continuing-education requirements, so note your renewal date and don't let it lapse.

Where people actually get stuck

Steps 1, 3, and 5 are paperwork and fees. Step 4 — passing the exam — is where candidates get stuck, often more than once. The range of topics and time pressure trip up people who know their trade cold but haven't practiced outside it, or who walk in with disorganized books and spend half the exam hunting for answers.

The most efficient way through is to drill questions across every topic and let the data show you where your gaps are. CSL DRILL gives you 574 practice questions, a full timed simulator, weak-area tracking, and a book hint on every question — so you walk into that test center ready, and only have to do this once.

CSL DRILL is an independent study tool and is not affiliated with or endorsed by the Commonwealth of Massachusetts, the BBRS, or PSI. Requirements, fees, and processes change — always verify with Mass.gov and PSI before applying.