California construction law governs how building projects are contracted, licensed, built, paid for, and fought over. It is not one body of law but several stacked on top of each other: the Contractors State License Law, the Right to Repair Act for residential defects, the mechanics lien statutes, prevailing wage rules on public works, Cal/OSHA, and Title 24 building standards. Bay Legal, P.C. represents owners, contractors, subcontractors, suppliers, and developers across California on contracts, defects, licensing, payment, and litigation.
Definition: Construction law is the set of California statutes, regulations, and contract rules governing the planning, building, payment, and defect liability of construction projects.
Jayson and Ashley have helped me tremendously with a construction dispute in which my previous general contractor demanded an unreasonable payment. Jayson quickly identified the key issues in the case and guided me through the entire process, advising me on the specific evidence needed to effectively challenge both the contractor and their attorney.
This review reflects one client’s experience. Results depend on the facts and law of each individual case and do not guarantee or predict a similar outcome in your matter.
What does construction law cover in California?
Five areas account for most matters:
- Contracts. Prime contracts, subcontracts, design agreements, surety bonds, and indemnity provisions. Scope, payment milestones, change order procedure, and risk allocation are all decided here, before anyone breaks ground.
- Licensing. Whether a contractor holds a valid CSLB licence, and what follows when they do not.
- Defects. Claims over workmanship, materials, and design, governed on residential work by the Right to Repair Act.
- Payment. Non-payment, retention disputes, stop notices, bond claims, and mechanics liens.
- Compliance. Cal/OSHA, prevailing wage on public works, Title 24 building standards, and environmental review.
Which California statutes govern a construction project?
Which rules apply depends on the project and on your role in it. The core California framework:
| Statute or code | What it governs | Who it affects most |
|---|---|---|
| Contractors State License Law — Bus. & Prof. Code § 7000 et seq. | Licensing, bonding, and discipline through the CSLB | Every contractor performing covered work |
| Right to Repair Act — Civ. Code § 895 et seq. (SB 800) | Residential construction defect standards and pre-litigation procedure | Builders and homeowners |
| Mechanics lien law — Civ. Code § 8400 et seq. | Securing payment against the improved property | Contractors, subcontractors, suppliers |
| Prevailing wage — Lab. Code § 1770 et seq. | Minimum wage and fringe rates on public works | Public works contractors |
| Cal/OSHA | Workplace safety, often stricter than federal OSHA | All employers on site |
| Title 24 | California Building Standards Code | Designers, builders, inspectors |
| Public Contract Code | Public bidding and procurement | Public works bidders |
| CEQA | Environmental review of projects | Developers and public agencies |
Federally funded work adds another layer: Davis-Bacon prevailing wages, the Miller Act bonding requirements, the Prompt Payment Act, and the Federal Acquisition Regulation. Projects touching federal money are a different compliance exercise from private work, and the difference should be settled at the contracting stage.
What happens if a contractor is not licensed?
This is the most consequential rule in California construction law, and the one that surprises people most. Under Business and Professions Code section 7031, a contractor who was not duly licensed at all times during performance cannot sue to recover compensation for the work — regardless of the quality of the work, and regardless of whether the owner knew about the licensing status.
The rule runs further than that. An owner may affirmatively recover compensation already paid to an unlicensed contractor. A contractor who built well, on time, and to specification can end up returning the entire contract price. Substantial compliance is available in narrow circumstances, and the exceptions are strict.
The practical consequences on both sides: verify licence status through the CSLB before signing anything, and if you are a contractor, treat continuous licensure as an existential business requirement rather than a paperwork item. A lapse of weeks during a job is enough.
How do construction defect claims work under the Right to Repair Act?
For residential construction, the Right to Repair Act — SB 800, codified at Civil Code section 895 and following — sets both the standards a home must meet and the procedure for claiming it does not. It is a pre-litigation process, not an optional one. A homeowner must give the builder notice and an opportunity to inspect and repair before filing suit, and a builder who fails to respond within the statutory timelines loses the protection of the process.
The Act specifies functionality standards across water intrusion, structural elements, soils, fire protection, plumbing, electrical, and other building components, with its own limitation periods attached to particular defect categories. Commercial construction sits outside the Act and is governed by contract and by ordinary tort and warranty principles.
How long do you have to bring a construction claim?
Two outer limits sit behind everything else. A patent defect — one apparent on reasonable inspection — carries a four-year limit under Code of Civil Procedure section 337.1. A latent defect, one not apparent on inspection, carries a ten-year limit under Code of Civil Procedure section 337.15, running from substantial completion. Ten years is an outer boundary, not a grace period: the ordinary limitation periods for breach of contract and negligence still run inside it, and they are shorter.
Mechanics lien deadlines are shorter still and unforgiving. A recorded lien must be enforced by lawsuit within 90 days under Civil Code section 8460, after which it expires. Preliminary notice deadlines run earlier again. Missing one of these does not weaken a claim — it ends it.
How are construction disputes resolved in California?
- Contract review. The dispute-resolution clause usually decides the forum before the dispute exists. Many construction contracts mandate arbitration.
- Documented demand. A written demand setting out the breach, the damages, and the contractual basis resolves a substantial share of disputes and builds the record if it does not.
- Statutory notices. Preliminary notices, stop notices, and mechanics liens have deadlines that run independently of negotiation. Preserve them while talking.
- Mediation. Frequently required by the contract before any filing.
- Arbitration or litigation. Filed in the Superior Court of the county where the project sits, or before the arbitral forum the contract names.
Venue follows the project. Bay Area work goes to San Francisco, Santa Clara, San Mateo, Alameda, or Contra Costa County Superior Court; Southern California projects to Los Angeles, Orange, or Ventura County. Bay Legal, P.C. serves San Francisco from its Palo Alto office.
I cannot imagine how we would have navigated through our conflict with our contractor, had it not been for Jayson. He was professional, compassionate, informative and responsive.
This review reflects one client’s experience. Results depend on the facts and law of each individual case and do not guarantee or predict a similar outcome in your matter.
Who needs a California construction attorney?
Owners and developers facing defective work, delay, or a contractor who has stopped. Contractors and subcontractors chasing payment, defending a defect claim, or facing a licensing problem. Suppliers securing payment through a lien. Design professionals facing a negligence claim. Public works bidders dealing with a bid protest or a prevailing wage audit.
The pattern worth noticing: almost everyone who calls a construction attorney does so after something has gone wrong, and almost every one of those matters would have been cheaper to prevent at the contracting stage.
Explore Bay Legal’s construction services
- Construction contracts — drafting, review, and negotiation
- Construction defect claims — residential and commercial
- Construction disputes — negotiation through litigation
- Contractor licensing issues — CSLB compliance and discipline
- Payment disputes — non-payment, retention, and bond claims
- Mechanics liens — recording, enforcing, and defending
Who handles construction matters at Bay Legal?
Construction is handled by the firm’s litigation group. Stephen Moses and Jason Rose both practise construction and real estate litigation. Kelsey J. Ibarrola handles construction matters including mechanics lien and arbitration work. Managing attorney Jayson R. Elliott and lead litigation attorney Evan Livingstone lead the group.
Bay Legal, P.C. serves clients statewide from offices in Palo Alto and Los Angeles, including construction projects across San Francisco and the wider Bay Area. The firm advises on construction law while working alongside your structural engineers, architects, and other technical advisors rather than replacing them.
Frequently Asked Questions
What does a California construction lawyer do?
Handles the legal side of building: drafting and negotiating contracts, advising on CSLB licensing and Cal/OSHA compliance, pursuing and defending defect claims, recovering payment through liens and bond claims, and litigating or arbitrating disputes. Most of the value sits at the contract stage, before anything has gone wrong.
What happens if my contractor is not licensed?
Under Business and Professions Code section 7031, an unlicensed contractor cannot sue to recover compensation for the work, no matter how well it was performed. An owner may also recover amounts already paid. Verify licence status with the CSLB before signing, and check that it remained continuously valid throughout the job.
How does the Right to Repair Act affect a defect claim?
For residential construction, SB 800 — Civil Code section 895 and following — sets both the standards a home must meet and a mandatory pre-litigation process. The homeowner must notify the builder and allow inspection and repair before suing. Builders who miss the statutory response deadlines lose the protection of that process.
How long do I have to bring a construction defect claim?
Four years for a patent defect, one apparent on reasonable inspection, and ten years for a latent defect, running from substantial completion, under Code of Civil Procedure sections 337.1 and 337.15. Those are outer limits. Ordinary contract and negligence limitation periods run inside them and are shorter.
Why does the mechanics lien law matter to contractors?
It provides security against the property itself rather than only a claim against whoever failed to pay. Civil Code section 8400 and following governs the process. The deadlines are strict: preliminary notice comes early, and a recorded lien must be enforced by lawsuit within 90 days under section 8460 or it expires.
What are the prevailing wage rules on public works?
On public works projects, Labor Code section 1770 and following requires workers to be paid at least the general prevailing rate for the locality, as determined by the Department of Industrial Relations, plus applicable fringe benefits. Non-compliance carries statutory penalties and can affect eligibility to bid on future work.
How does Cal/OSHA differ from federal OSHA?
California operates its own state plan with standards that frequently exceed the federal baseline, including specific requirements for heat illness prevention, wildfire smoke exposure, and fall protection. Contractors working across state lines should not assume federal compliance satisfies California requirements.
Should I involve an attorney before the project starts?
It is the cheapest point to involve one. Scope, payment milestones, change order procedure, delay damages, indemnity, and the dispute-resolution forum are all negotiable before signature and fixed afterward. A contract review costs a fraction of the dispute it prevents.
Does Bay Legal handle construction matters in San Francisco?
Yes. Bay Legal, P.C. serves San Francisco construction clients from its Palo Alto office, and matters over San Francisco projects are filed in San Francisco County Superior Court. The firm also handles construction work across Santa Clara, San Mateo, Alameda, and Contra Costa Counties in the north, and Los Angeles, Orange, and Ventura in the south.
Related Questions
What is a stop notice?
A statutory notice that freezes construction funds held by an owner or lender, giving an unpaid claimant a route to payment separate from a mechanics lien. It is often used alongside a lien rather than instead of one.
Does a change order have to be in writing?
The contract usually requires it, and unwritten change orders are among the most common sources of construction payment disputes. Verbal approval on site is not a substitute for the procedure the contract specifies.
Who is liable for a design defect?
It depends on the delivery method. Under a traditional design-bid-build contract, design responsibility generally sits with the architect or engineer. Under design-build, it consolidates with the contractor. The contract allocates it.
Can a homeowner file a mechanics lien?
No. The lien remedy is for those who furnished labour, services, equipment, or materials to improve the property — contractors, subcontractors, suppliers, and design professionals. A homeowner’s remedies against a contractor lie in contract and in defect claims.
What is retention, and when must it be released?
A percentage of each payment withheld until the work is complete, used as security for performance. California statute limits retention on public works and regulates release timing, and wrongful withholding can carry penalties.
Talk to a California construction attorney
Construction deadlines run whether or not anyone is negotiating, and lien and notice periods are among the shortest in California law. To discuss a contract, a defect, a licensing question, or an unpaid invoice with a Bay Legal attorney, call the office nearest you or email intake.
He patiently listened to me and clearly explained two paths that I could take regarding my dispute with a contractor. I have a feeling that I have found the right legal office for my current and future needs.
This review reflects one client’s experience. Results depend on the facts and law of each individual case and do not guarantee or predict a similar outcome in your matter.
Bay Legal, P.C. — serving California statewide
Northern California office
667 Lytton Ave Ste 3, Palo Alto, CA 94301
Southern California office
3211 Cahuenga Blvd W Ste 212, Los Angeles, CA 90068
Intake: intake@baylegal.com
Fax: (650) 963-0041
Website: https://baylegal.com