Regulations

California Requires You to Divert 65% of It

Most states leave diversion to good intentions. California puts a number on it, attaches it to your building permit, and asks you to document it.

⭐ A number, not a suggestion

In most of the country, recycling your construction debris is good practice. Somebody encourages it, nobody measures it, and the job finishes either way.

That single number changes what a dumpster is for on a permitted Santa Ana job. It stops being a convenience you hire because carrying rubble to a truck is miserable, and becomes part of how you demonstrate compliance to the people who signed your permit.

It also changes who carries the risk. The diversion obligation sits with the project, which in practice means the permit holder — the owner or the contractor — not the company that dropped off the box. So it is worth understanding before the first wall comes down.

What CALGreen actually says

The requirement is a floor, not a target: at least 65% of the non-hazardous construction and demolition waste generated by the project has to be diverted from landfill, by recycling or by salvage for reuse. Where a local ordinance is stricter than the state floor, the stricter rule is the one that applies.

Two words in that sentence do a lot of work.

Non-hazardous matters because the hazardous fraction is excluded from the calculation and handled on an entirely separate route. Paint, solvent, adhesive, treated material and anything with asbestos in it are not part of your 65% — they are their own problem, with their own disposal path.

Salvage for reuse matters because diversion is not only about crushing and sorting. Doors, cabinets, fixtures, timber and roofing material that leave the site to be used again count. On a period renovation in one of Santa Ana's historic districts, salvage is often the easiest diversion there is.

⚠️ Which jobs it reaches

This is the part people get wrong in both directions — some assume it applies to everything they do at home, others assume it only applies to large commercial work.

The honest answer is that it is tied to the permit. If you are pulling a building permit for new construction, an addition, or a substantial alteration or demolition, you are in scope and your enforcing agency will tell you exactly what it wants. If you are clearing a garage, swapping a bathroom vanity or taking out a dead hedge, you are not.

⚠️ Where people get caught is the job that grows. A kitchen refresh that turns into moving a wall, or a reroof that turns into a structural repair, can cross from unpermitted into permitted work — and the diversion documentation starts from the beginning of the job, not from the day the scope changed.

If you are not sure which side of the line you are on, the building counter is the place to ask, and it is a cheaper question before the work than after.

⭐ What a waste management plan has to do

Where a plan is required, the shape of it is consistent: identify the materials the job will generate, say where each stream is going, and then show what actually happened.

In practice that means three things.

An estimate up front of what the job will produce, by material — concrete and masonry, timber, metal, drywall, roofing, cardboard, mixed.

A named destination for each stream. This is where the facility matters: material taken to a facility that sorts and recovers counts toward diversion in a way that material tipped straight into a landfill does not.

Evidence at the end. Weight tickets and facility receipts. This is the part that gets forgotten, and it is the only part that proves anything. A job with excellent intentions and no tickets has documented nothing.

How a container either helps or hurts you

A roll-off can be the easiest way to hit 65%, or the reason you miss it. The difference is where it goes and what is in it.

A container taken to a facility that sorts mixed C&D and recovers the recyclable fraction produces a documented diversion rate. A container of genuinely clean single material — concrete only, metal only, clean timber only — produces a very high one, because almost all of it is recoverable.

A container of thoroughly mixed debris with food waste, packaging, a mattress and half a can of paint in it produces a poor one, and may be rejected outright.

So the useful question to ask a hauler on a permitted job is not what the container costs. It is where the material goes and whether you will get the documentation. We will tell you plainly, because on this kind of job it is the thing that matters.

⚠️ The mixed-load problem

Separation is the single biggest lever on a diversion rate, and it is worth being concrete about why.

Concrete, block, brick and masonry are almost entirely recoverable when clean. They are also the heaviest thing on most sites, so separating them improves both your diversion rate and your weight position at the same time. On a driveway or patio tear-out this is the easy win.

Metal is essentially 100% recoverable and has its own value. It should never be in the general container.

Clean timber is recoverable. Timber mixed with drywall dust, insulation and packaging is much less so.

Cardboard is a surprising proportion of a new-build or fit-out by volume, and it is easy. Flatten it and keep it separate.

⚠️ And the reverse: a single contaminating item can downgrade an entire load. Hazardous material in a C&D container is the obvious case, but food waste, soil and general household rubbish all pull a construction load toward the landfill fraction.

Keeping the paperwork straight

A simple discipline covers almost every job.

Photograph the container when it is loaded, before it leaves. Keep every weight ticket in one place as it arrives rather than hunting for them at the end. Note which stream each ticket belongs to while you still remember. If the job runs to several containers, keep them in date order.

None of that is difficult, and all of it is miserable to reconstruct three months later when someone asks for the diversion report. The jobs that struggle with this are never the ones that kept the tickets.

What to ask before the job starts

Four questions settle it. Does this job need a waste management plan, and who at the enforcing agency confirms that. Which facility will the material go to. Will you receive weight tickets for every haul. And is it worth separating any stream on this particular job, or is mixed-and-sorted the better route.

Tell us at the booking that the job is permitted and needs documentation. It changes what we recommend — sometimes toward separate containers, sometimes toward one mixed load to the right facility — and it is much easier to plan at the start than to retrofit at the end.