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Contra Costa County · Construction Inspector & Materials Tester
Construction Inspector & Materials Tester prevailing wage in Contra Costa County, California
$101.99an hour, base wage + fringe benefits · Group 1
$65.89 base wage + $36.10 fringe benefits
Contra Costa County uses the same construction inspector or materials tester rates as 45 other counties. See all of them on one page.
On California public works in Contra Costa County, a Group 1 construction inspector or materials tester must be paid at least $101.99 an hour in total: $65.89 in wages plus $36.10 in employer payments to health, pension, training and other funds. Daily overtime is $134.935 and Sunday and holiday work is $167.88. DIR puts 5 job titles in Group 1, asnt level ii-iii and dsa masonry among them.
DIR general determination NC-63-3-9-2026-1, issued August 22, 2026. Expires June 30, 2027. Checked against dir.ca.gov on October 24, 2026.
DIR lists 4 construction inspector or materials tester rates for Contra Costa County, from $85.01 to $101.99 an hour. See all of them.
Base wage and fringe benefits: $65.89 + $36.10
The basic hourly rate is the taxable wage. The other lines, the fringe benefits DIR calls employer payments, are what DIR expects the employer to pay into health, pension and other plans for each hour worked. An employer can pay part of that as extra wages instead, as long as the total per hour stays at $101.99 or more.
| Basic hourly rate (taxable wage) | $65.89 |
| Health and welfare (footnote b) | $13.88 |
| Pension | $14.82 |
| Vacation and holiday | $5.89 |
| Training | $1.24 |
| Other payments | $0.27 |
| Total straight-time hourly rate | $101.99 |
Straight time covers an 8-hour day.
When does this rate change?
- A project pays the rates in effect on its bid advertisement date for the life of the job, plus any increase DIR set in advance (DIR FAQ).
- DIR issues new determinations on February 22 and August 22, and they take effect 10 days later. This rate is from determination NC-63-3-9-2026-1, issued August 22, 2026; DIR's expiration date for it is June 30, 2027.
Scheduled increases
DIR has already set these increases. Work on or after each date is paid the higher rate. DIR often leaves part of an increase "to be allocated to wages and/or employer payments" and confirms the split when it comes due, and it can reduce a scheduled increase in a later notice, so check DIR's increase page before you pay it.
| Takes effect | Increase per hour | Total after increase |
|---|---|---|
| July 1, 2027 | +$4.00 | $105.99 |
| July 1, 2028 | +$4.00 | $109.99 |
| July 1, 2029 | +$4.00 | $113.99 |
The double asterisk after DIR's expiration date means the next rate is already set. If the work runs past that date you have to pay the new rate, and DIR says to build it into contracts signed now (DIR FAQ, Q8).
Source: DIR increase PDF
Construction Inspector & Materials Tester Group 1 job titles
Work DIR classifies in Group 1, copied as printed. The other groups and their rates are in the table below.
- ASNT Level II-III
- DSA Masonry
- DSA Shotcrete
- Lead Inspector
- NDT Level Two
Source: Group 1, page 3
Every construction inspector or materials tester rate in Contra Costa County
As DIR lists them. The highlighted row is the one this page leads with.
- Group 1$101.99
- Group 2$99.99
- Group 3$91.80
- Group 4$85.01
| Classification | Base wage | Fringe benefits | Total rate | Daily OT | Determination |
|---|---|---|---|---|---|
| Group 1 | $65.89 | $36.10 | $101.99 | $134.935 | NC-63-3-9-2026-1 |
Group 25 jobs in this group
| $63.89 | $36.10 | $99.99 | $131.935 | NC-63-3-9-2026-1 |
Group 34 jobs in this group
| $55.70 | $36.10 | $91.80 | $119.65 | NC-63-3-9-2026-1 |
Group 46 jobs in this group
| $48.91 | $36.10 | $85.01 | $109.465 | NC-63-3-9-2026-1 |
Davis-Bacon construction inspector or materials tester rate in Contra Costa County
Federally funded or assisted construction here uses the U.S. Department of Labor's wage determinations. When a California awarding body runs a federally funded or assisted project, DIR's rates must be paid where they are higher than the Davis-Bacon rates (DIR public works FAQ).
The federal determinations for Contra Costa County list no construction inspector or materials tester classification.
Davis-Bacon rates from SAM.gov, read October 25, 2026. Our federal totals are base plus fringe; DOL prints no total. California Davis-Bacon changes
How Contra Costa County compares
The main construction inspector or materials tester rate in every county that has one, and how the pay splits here and in the nearest counties. All bars use the same scale.
Every county in California
Base wage and fringe benefits, nearby
- Contra Costa Countybase $65.89$101.99
- Alameda Countybase $65.89$101.99
- Solano Countybase $65.89$101.99
- Mono Countybase $65.18$104.53
Construction Inspector & Materials Tester rates in nearby counties
Current DIR rates. You pay the rate for the county where the work is done, even if your shop is somewhere else.
DIR's construction inspector or materials tester rates for Contra Costa County are the same as in 45 other counties: Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Del Norte, El Dorado and 37 more. The closest county with a different rate is Mono County, at $104.53.
| County | Classification | Base wage | Total rate | vs Contra Costa County |
|---|---|---|---|---|
| Contra Costa County | Group 1 | $65.89 | $101.99 | |
| Alameda County | Group 1 | $65.89 | $101.99 | same |
| Solano County | Group 1 | $65.89 | $101.99 | same |
| San Francisco County | Group 1 | $65.89 | $101.99 | same |
| San Joaquin County | Group 1 | $65.89 | $101.99 | same |
| San Mateo County | Group 1 | $65.89 | $101.99 | same |
| Marin County | Group 1 | $65.89 | $101.99 | same |
California construction inspector or materials tester prevailing wage by county, with a map
Footnotes on this rate
DIR's footnotes, in DIR's words. Several change the rate itself: zone pay, a percentage added to the total, or which overtime hours get which rate.
- a For classifications within each group, see page 3.
- b Amount shall be paid for all hours worked up to 173 hours per month.
- c Rate applies to the first 4 daily overtime hours, Monday through Friday, and the first 8 hours on Saturday. All other overtime is paid at the Sunday/Holiday overtime rate.
DIR's other marks: # means an apprenticeable craft, * means in effect until superseded, ** means the next rate is already set.
More from DIR on this rate
- Holidays (DIR PDF)
- Scope of work: which tasks this rate covers
- Travel and subsistence
- Apprentice rates: DIR publishes these separately, by program. Look them up on DIR.
Are you being paid this rate?
Add your hourly wage to what your employer pays into health, pension and other plans for you, and compare it with $101.99. Plan payments only count if the money goes into the plan; your pay stub won't show them, but plan statements will. The training amount goes to the California Apprenticeship Council or an apprenticeship program, not to you. Check a week of pay.
Contractors on most public works jobs file certified payroll with the state, and anyone can look it up in DIR's CPR public search. If your total comes up short, you can file a public works complaint with the California Labor Commissioner.
Source
California Department of Industrial Relations, general prevailing wage determination NC-63-3-9-2026-1, page 1: www.dir.ca.gov/oprl/2026-2/PWD/Determinations/Northern/NC-063-3-9.pdf
Each figure is copied from DIR's file and checked by a second, separate reader. How we check · How to read a determination · Download Contra Costa County as CSV · Report an error