Three things have to happen before a machine turns: the C-21 in California

Every other trade sells what it puts into a building. You sell what comes out of one, and California has a firm opinion about all three parts of that: what you are allowed to start, what is inside the structure before you touch it, and where every ton of it ends up.

That is the margin story in this classification. Price machine time and hope about the rest, and you lose money on jobs that looked simple. Price the permit lead time, the survey, the abatement standby and the diversion, and you win work at a number the other bidder thinks is crazy.

Demolition is a job Cal/OSHA permits before you start

California runs on Cal/OSHA and Title 8, not the federal standards, and Title 8 requires a Cal/OSHA permit for demolition. It is the same permit family that covers trenches 5 feet or deeper and work above 36 feet, so a demolition contractor who also digs and works at height is dealing with that desk on nearly every job.

This is not a form you fill in the morning you mobilize. It is a lead time sitting in front of your start date on every schedule you sign. Put it on the critical path at bid stage, in front of the client, and you have done something the low bidder has not: told the truth about when the site clears.

What is inside the building decides who touches it first

Before anything comes down, somebody has to know what is in it, and two answers change the entire job.

Asbestos work needs Division registration and trained workers. That is a standing state registration held by the business, on top of a license, so the abatement ahead of your demolition is either subcontracted to a registered abatement contractor or it does not happen legally. Build that relationship before a survey forces you to find one in a week. The C-22 asbestos abatement route covers the registration and HAZ hazardous substance removal covers contaminated ground.

Lead is the one people get wrong, because they read a federal fact sheet and stop reading. California lead limits are far stricter than the federal ones, which changes your exposure controls, your monitoring and your crew training on any painted structure of a certain age. Assume the California answer. Respirable crystalline silica comes with the same discipline: limits and a written control plan, on a trade that makes dust for a living.

At ten or more employees Prop 65 sits alongside all of it, with a 60 day notice mechanism and exposure at $2,500 a day, which makes your warning practice a business decision rather than a poster. Prop 65 for contractors has the shape of it.

CALGreen wants at least 65 percent of it diverted

CALGreen sets construction and demolition waste diversion at a minimum of 65 percent, inside a code structure of mandatory measures plus two voluntary tiers, and local jurisdictions hang the documentation on permit closeout. Your final paperwork on a teardown is a tally of where the material went.

Run it on a structure that generates 480 tons.

The 312 tons come out of concrete, metal, wood and clean gypsum, and each is a separate haul, a separate ticket and, on metal, sometimes a credit instead of a cost. Sort on site and keep the tickets and the number is knowable before you bid. Mix it into one box and hope, and unpriced risk sits on the biggest line in your estimate. That gap is arithmetic, not skill, which is why it is worth owning: put your real haul rates, gate fees and metal recovery into the markup and margin calculator once and you stop bidding tear-outs on feel. Title 24 and CALGreen for contractors has the code structure.

What the pre-start sequence really looks like

Twenty weeks pass between the first row and the day a machine turns, and only the last row is the work. Selling that timeline honestly at bid stage is how you stop being the contractor who is permanently late on somebody else's paperwork.

What the C-21 signs for, and where it stops

The classifications sit in the 16 CCR 832 family, and the rule under all of them is that work outside the classification you hold is not permitted (BPC). The C-21 covers demolition of structures and the moving of buildings: interior strip-out, structural removal, the cribbing, jacking and transport of a structure to a new site, and leaving the site as the contract calls for.

A general building contractor takes a prime contract only where at least two unrelated building trades or crafts are involved (BPC s.7057(a)). Demolition owners who expand usually take an A general engineering license rather than a B, because what grows out of this trade is site work, and C-12 earthwork and paving is the common second classification for the same reason.

The site rules that are line items, not overhead

Cave-in protection starts at 5 feet, a means of egress is required at 4 feet within 25 feet of lateral travel, and a Cal/OSHA permit covers any trench 5 feet or deeper. Fall protection applies above 7.5 feet. You keep a written Injury and Illness Prevention Program and produce it within 5 business days of a request, hold tailgate meetings at least every 10 working days, and report a death or serious injury within 8 hours.

On the ground itself, stormwater permit coverage begins at one acre of disturbance, with a SWPPP written by a QSD and implemented under a QSP, and fugitive dust is set by your local air district rather than the state. Cal/OSHA and the IIPP and the stormwater and SWPPP guide cover who holds which certification.

The four years, pointed at this trade

Four years of journey-level experience inside the last ten (16 CCR 825), certified by somebody with direct knowledge of it. Journey-level counts as journeyman, foreman, supervising employee or contractor, and education can offset up to three of the four years.

Demolition certifies unusually well, because the job is supervisory by nature. The certifier is normally the owner or superintendent of the outfit whose crews you ran, or the general whose teardowns you handled. What matters on the form is that you planned the sequence, handled shoring and the protection of adjacent structures, ran the material streams and dealt with the permit desk. The CSLB experience requirement covers who can sign and how certifications fail.

The exams and the money

Two exams: Law and Business, about 115 questions, and the C-21 trade exam, about 100 questions, both multiple choice and closed book at a PSI test center, calibrated per version rather than scored against a fixed percentage. The trade half is where a lifelong operator revises what the office always handled: structural sequencing and load paths during removal, shoring and bracing, hazardous material recognition, and the permit and notification obligations above. The exams guide has the study order.

Money: $450 for the original application, then $200 for a sole owner or $350 otherwise, biennial renewal, no continuing education. The bond is $25,000 (BPC s.7071.6), with an additional $100,000 employee and worker bond for an LLC (BPC s.7071.6.5). Workers compensation goes in before the first crew day, because the license is suspended by operation of law on the day cover lapses, with no warning and no grace. The bond and qualifier guide and workers comp cover both.

Where a California demolition contractor finds the next job

CEQAnet is the best lead source this trade has, because almost every redevelopment that needs a building gone files an environmental document first, months or years ahead of tender. Permits published by Los Angeles, San Francisco, San Diego and Sacramento show the same work once it is real, and Caltrans advertisements carry structure removal on state highway jobs.

The public lane is worth the administration. Prevailing wages apply on public works over $1,000, you and every listed subcontractor must be DIR registered to bid, registration renews on July 1, and certified payroll is filed electronically at least monthly. Agencies demolish continuously, and they pay. Where work is starting in California and prevailing wage for California contractors cover both sides.

The next thing to do

The order is fixed: prove the four years, file the application, sit two exams, post the bond, put workers comp in place, choose the entity, pay the license fee. Get the experience certification moving first, because it waits on other people. The full CSLB license sequence is the map and starting a construction business in California covers the entity choice.

On AEC Stack there is no monthly subscription. The platform fee is 2.5 percent of each invoice processed through the platform, so nothing costs you anything until a job pays.

Open a working demo business file, load your last teardown with the real tonnage and the real gate tickets, and find out whether the 65 percent was priced or absorbed.