California carpet installation runs $4.50 to $9.00 per sq ft fully installed, the third most expensive state in the US after Hawaii and Alaska. The Bay Area and LA County run at the top of that range, driven by Carpenters Union labour rates; the Central Valley runs 20 to 25 percent cheaper. The CalRecycle carpet stewardship assessment adds another small line on every California carpet bill that does not exist in any other state.
California is the only US state with a mandatory consumer-paid carpet recycling assessment. The Carpet Stewardship Act (Assembly Bill 2398), signed in 2010 and operational from 2011, requires every retailer selling carpet in California to collect a per-square-yard fee on every transaction. The fee is set annually by CalRecycle in coordination with the carpet stewardship organisation (CARE, the Carpet America Recovery Effort), and funds carpet drop-off sites, mill recycling infrastructure, and outreach.
As of the current rate period the assessment sits in the $0.30 to $0.55 per square yard band, depending on carpet type. On a standard 1,000 sq ft (111 sq yd) job, that is $33 to $61 collected on top of the carpet price. The assessment must appear as a line item on every California carpet invoice; if it does not, the retailer is out of compliance and you should ask why. On large jobs (2,000+ sq ft) the assessment can add $60 to $120, still a small fraction of total cost but worth knowing the line item exists. The current rate schedule is published on the CalRecycle carpet program page.
California's building energy code includes CALGreen mandatory indoor-air-quality measures that apply to all new residential construction and to additions, conditioned-space remodels, and certain permit-pulled flooring upgrades. The relevant section requires installed carpet to meet the Carpet and Rug Institute's Green Label Plus low-VOC standard, or the FloorScore equivalent.
In practice this rarely constrains a homeowner doing a like-for-like recarpet because every major US carpet manufacturer (Mohawk, Shaw, Stainmaster, Karastan, Dream Weaver) already produces almost all their lines to Green Label Plus standard, including the budget polyesters. Where Title 24 becomes a real factor is on imported budget carpet (some discount-warehouse imports do not carry certification) and on recycled-content lines where some of the older recycled-fibre carpets pre-dated the standard. Ask your dealer to confirm the carpet you are pricing is Green Label Plus certified; for any mid-grade nylon from a US mill, the answer will almost certainly be yes.
Three California-specific cost lines beyond the CalRecycle assessment regularly appear on bills. Permit fees: in the City and County of San Francisco, certain multi-family flooring replacements require a building permit, which adds $200 to $500 to project cost; this is unusual outside of dense urban California but it does happen. Union pay-scale on prevailing-wage public-sector jobs (school district, municipal building, state contract) follows Davis-Bacon rates which California publishes quarterly and which can push install labour to $2.50 to $3.50 per sqft on those jobs. Earthquake-prep furniture handling: a few high-end installers in coastal California will include re-anchoring furniture to walls after carpet replacement as a line item ($50 to $150), driven by seismic-retrofit norms in older homes. None of these apply to most residential bedroom installs, but they appear often enough on whole-house bills to flag.