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Building Code Reference

Got a CALGreen 4.408 correction?

Construction waste diversion

For builders in California, Greater Seattle, the Las Vegas area, the Denver area and Kansas City · CrossBeam Permits

What this code requires, how to fix it, and how cities and counties review it

What this code requires

CALGreen Section 4.408 requires residential construction projects to divert at least 65% of construction and demolition waste away from landfill — or keep total landfill disposal at or below 3.4 pounds per square foot of the project. Before the city approves your permit, you need a waste management plan on file showing how you'll hit that target. New single-family homes, additions, and remodels over a certain square footage all fall under this section.

How to fix it

  1. Calculate estimated waste weight and project area

    Divide the estimated weight of construction and demolition waste you will send to landfill by the building area in square feet. If that number is 3.4 lbs/sq ft or under (Section 4.408.4, low-rise), you meet the weight-based threshold. Most residential remodels and new builds exceed that, so most contractors use the 65% diversion path instead. Either way, run this math first — it tells you which standard you're actually targeting before you write the plan.

  2. List every material category with diversion method

    Your plan needs a line item for each material stream: concrete and masonry, wood framing and finish lumber, drywall (clean gypsum), metals (copper pipe, rebar, steel studs), cardboard and paper, and mixed C&D debris. For each, note whether it goes to a certified recycler, a transfer station, or a salvage facility. Don't bundle everything under one facility — plan-checkers want to see that you've thought through each stream.

  3. Identify your receiving facility by name and address

    Name the specific recycling facility or hauler for each material. In Orange County, local CalRecycle-certified C&D processors accept clean loads. Listing the facility's name and city is usually enough for plan check — you don't need to attach a contract at submittal, but you do need something more specific than 'local recycler.' Check your city's approved hauler list if one exists; some cities restrict which facilities qualify.

  4. Show the diversion percentage estimate in the plan

    State your estimated diversion percentage explicitly. A well-sorted job comfortably clears 65% — that is the floor, and good material separation typically lands well above it. Your plan should show the math: estimated total waste in tons or pounds, minus what you expect to recycle, divided by total. A simple table works. The goal is to show the plan-checker that 65% is achievable, not just claimed.

  5. Place the waste management plan note on the cover sheet or general notes

    The plan-checker has to be able to find it. Most cities want the waste management plan either as a dedicated sheet or as a clearly labeled note block on the general notes sheet. Burying it in the specifications binder doesn't count for plan check purposes. Label it 'CALGreen Section 4.408 Construction Waste Management Plan' so the reviewer doesn't have to hunt.

  6. Check for local ordinance requirements above the state minimum

    Some Orange County jurisdictions require a post-construction report confirming actual diversion. Anaheim's waste management program and Huntington Beach's construction recycling requirements both have documentation expectations at job closeout. If your city requires hauler receipts or facility weight tickets, note that you'll collect and submit them before final inspection. Addressing this upfront prevents a last-minute correction at final.

  7. Verify drywall and specialty materials are covered

    Drywall is the most commonly missed material. Clean drywall (not painted or water-damaged) is accepted by gypsum recyclers and counts toward your diversion percentage. Check that your plan explicitly lists gypsum board. Other materials to check: carpet and flooring, asphalt shingles if a re-roof is part of the project, and glass. Each additional material stream covered strengthens the plan and pads your diversion percentage.

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Why you got flagged

Plan-checkers flag CALGreen 4.408 most often because the waste management plan is missing entirely. The sheet set arrives, the plan-checker opens the notes and spec sheets, and there's no mention of waste diversion at all. Most contractors assume it's handled by the recycler at the end of the job — but the code requires the plan upfront, before approval, not after the dumpster haul.

The second scenario is an incomplete plan. A contractor submits a one-liner that says "all waste will be recycled per CALGreen." That doesn't cut it. The plan needs to name the specific materials being diverted (concrete, drywall, wood framing, metals), identify the receiving facility or recycler, and show the estimated diversion percentage or projected weight per square foot. A vague note gets kicked back.

Third flag: the plan was submitted but doesn't cover all regulated materials. Drywall is the one that trips people up most. A lot of waste management plans list lumber, concrete, and metal, then forget that clean drywall is separately recyclable and commonly accepted by gypsum recyclers in Southern California. If the plan omits it, the plan-checker can note the gap.

Finally, some corrections come from a local ordinance that's stricter than the state standard. Orange County cities like Anaheim and Huntington Beach sometimes require documentation from the hauler or facility confirming receipt of the diverted material. If your plan doesn't reference that documentation step, expect a note on the corrections letter.

The official code

CALGreen Section 4.408 — Construction Waste Reduction, Disposal and Recycling

Read the source →

Common questions

Does CALGreen 4.408 apply to small remodels and additions?
CALGreen Section 4.408 applies to all residential additions, alterations, and new construction that requires a building permit — but the practical threshold is the scope of the project generating significant C&D waste. Most cities apply it to any permitted project involving demolition or new framing. Check your city's local amendments, since some jurisdictions exempt projects below a certain square footage threshold or valuation. If the job involves tearing out drywall, pulling old framing, or pouring a new foundation, assume 4.408 applies and prepare the plan before you submit.
What's the difference between the 65% diversion and the 3.4 lbs/sq ft option?
CALGreen 4.408 gives you two ways to comply. The first is diverting at least 65% of your total C&D waste by weight away from landfill. The second is keeping total landfill disposal at or below 3.4 pounds per square foot of the project's floor area. Most projects use the 65% path because it's easier to document with recycling receipts. The weight-based path can work for smaller projects that generate very little waste per square foot, but you'd need precise weight data from your hauler to verify compliance.
Do I need a separate waste management plan sheet or can it be a note?
Either format works at most jurisdictions — a dedicated sheet or a labeled note block on your general notes page. What matters is that it's clearly labeled, easy to find, and covers the required content: materials, diversion methods, receiving facilities, and estimated percentages. Some cities have their own waste management plan form that they require you to fill out and submit. Check your city's building department website or call the plan check desk before you finalize your submittal.
What happens if I don't hit 65% diversion during construction?
The waste management plan is what gets you to permit approval — but some cities follow up at project closeout by requiring hauler receipts or facility weight tickets confirming actual diversion. If you came in under 65%, you may need to explain the shortfall or demonstrate you met the weight-based alternative. In practice, most plan check departments don't audit final diversion numbers unless a complaint triggers it. But if your city requires closeout documentation, any discrepancy can delay your final inspection.
Does painted or damaged drywall count toward diversion?
No. Gypsum recyclers generally accept only clean, uncontaminated drywall. Painted drywall, wet drywall, or drywall with joint compound still on it is typically rejected by gypsum recyclers and ends up in landfill. For your plan, only count clean drywall scraps toward your diversion total. If you're doing a full demo and most of the drywall is painted, adjust your diversion estimate accordingly and make sure you're covering other material streams to still hit the 65% target.
Can mixed C&D debris going to a transfer station count as diverted?
It depends on the facility. California has certified mixed C&D processors that sort incoming loads and report diversion rates. If you're hauling mixed debris to a certified facility that achieves at least 65% recovery on its end, many cities will count that toward your project's diversion compliance. Get the facility's current CalRecycle certification and diversion rate in writing. Some cities require you to attach that documentation to your waste management plan at submittal. Uncertified landfill-based transfer stations do not count toward diversion.

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