- California public agencies generally must award construction contracts above statutory thresholds by competitive bid to the lowest responsible bidder, though alternative methods exist for certain agencies and project types.
- School districts commonly prequalify bidders, and K-12 and community college construction often falls under the Division of the State Architect (DSA) review.
- Term and job-order contracts are a way for agencies to handle repeating HVAC work without rebidding every task.
- Maintenance and repair on public buildings is usually prevailing-wage work, which affects scheduling and price.
- Scheduling around the academic calendar is as important as the technical scope for school projects.
Competitive bidding basics
Public agencies in California are bound by the Public Contract Code, which sets bid thresholds, notice requirements, and award rules that vary by type of agency (cities, counties, school districts, and special districts have different statutes). Above the threshold, work is advertised, sealed bids are received on a date certain, and the contract goes to the lowest responsible, responsive bidder.
- Responsive means the bid conforms to the instructions: forms completed, addenda acknowledged, bond provided, subcontractors listed.
- Responsible means the contractor has the ability, license, experience, and integrity to perform.
- Below-threshold work may be handled by quotes, informal procedures, or term contracts; threshold amounts change periodically, so confirm current figures.
See commercial HVAC project delivery and bidding for the contractor-side view of bid packages and estimating.
Prequalification, licensing, and registration
- License: A valid California contractor license in the correct classification for the work.
- DIR registration: Required for public works bidders and subcontractors.
- Prequalification: School districts often require bidders (and sometimes subs) to submit standardized questionnaires covering experience, safety record, financial capacity, and past performance before they may bid. Projects above statutory dollar levels commonly trigger this requirement for K-12 districts.
- Safety: Experience modification rate (EMR) and OSHA history are routinely reviewed.
School projects: DSA, calendars, and occupied campuses
Construction on K-12 and community college campuses in California is generally overseen by the Division of the State Architect, which reviews structural, fire and life safety, and accessibility aspects. HVAC replacement can trigger DSA review depending on scope, particularly where equipment is mounted on structures or new penetrations and supports are involved. Districts engage architects and engineers who handle the submittal process, and the contractor's schedule must account for approval times.
- Calendar: Major shutdowns are usually limited to summer break and holiday recesses; equipment lead times must align.
- Occupied campuses: Student safety rules, background checks and fingerprinting for workers, and noise or dust restrictions.
- Inspector of record: DSA-approved projects use a district-hired inspector; their sign-off is part of closeout.
- Funding: Bond measures and state programs often fund modernization with specific requirements for labor standards.
- PLA: Some districts adopt project labor agreements for bond-funded work.
Our schools and public facilities page covers how we plan around campus schedules.
Alternatives to one-off bidding
| Method | How it works | Typical use |
|---|---|---|
| On-call / term contract | Contractors are selected for a period and perform assigned tasks at agreed rates | Recurring HVAC service and repairs |
| Job order contracting (JOC) | Unit-price book with a coefficient; each task order is priced from the book | Many small-to-medium projects, faster mobilization |
| Cooperative or piggyback purchasing | An agency uses a contract competitively awarded by another agency, where law allows | Equipment or service procurement |
| Design-build and CM at risk | Available to some agencies for certain projects under specific statutes | Complex or fast-track work |
| Emergency procurement | Streamlined process when there is a threat to health or safety | Critical failures such as loss of heating or cooling in occupied buildings |
Which alternatives are available depends on the type of agency and the project. Agencies should confirm with counsel; contractors should read the solicitation carefully.
Labor compliance on public maintenance and repair
Because maintenance of public facilities is generally covered by prevailing wage, HVAC service contracts for public buildings require registered contractors, certified payroll, and compliance with apprenticeship rules. Agencies often employ labor compliance programs or outside consultants to monitor. See the prevailing wage guide.
What this looks like in Orange County
Orange County's public buildings span county facilities in Santa Ana, city halls and civic centers, libraries, fire stations, public safety buildings, school districts large and small, community colleges, special districts, and transit and park facilities. Equipment ranges from rooftop packaged units on single-story buildings to chilled-water and boiler plants at larger campuses. Many of these assets are 15 to 30 years old, which puts replacement planning, refrigerant transitions, and Title 24 compliance on the agenda. See Title 24, permits, and HVAC replacement.
For contractors: winning and delivering public work
- Keep license, DIR registration, bonding, and insurance current and ready to submit.
- Read the bid instructions twice; most disqualifications are clerical.
- Attend mandatory pre-bid walks and ask questions in writing before the RFI deadline.
- Price labor with the right classifications and rates.
- Plan submittals and lead times against the district's calendar.
- Document everything: daily reports, photos, RFIs, and change requests.
Frequently asked questions
Are you set up for public agency and school work?
Yes. We are a UA Local 250 member, PLA and prevailing-wage ready, with certified payroll for public work.
Can our district pre-qualify you?
Yes. We complete district prequalification questionnaires and can provide references, licenses, insurance, and safety information.
Do you work with job order contracts or on-call agreements?
We are open to term and on-call arrangements for recurring HVAC and refrigeration service. Contact us about your procurement approach.
How do you handle school calendars?
We plan lead times and installation dates backward from the break periods, and coordinate access, safety, and noise restrictions with district staff.
Have a site this applies to?
Davinci Mechanical is the commercial and union division of Scottish Tom's Heating & Air. Send us the equipment list or the problem and we'll tell you what we'd check first.