CALIFORNIA CONTRACTOR RESOURCE CENTER
California home improvement contract resource center
A source-linked California contractor library for home improvement contracts. Start with the requirements overview, then use the focused guides for payments, notices, change orders, signatures, plans, insurance and other workflow questions.
Last reviewed: September 26, 2026
Start with the California contract framework
Think of this page as the index. If you'd rather read the main California home improvement contract requirements in one place, start with the requirements guide.
For a California home improvement agreement above the $500 line, §7159 is one of the main statutes a contractor should open first. The dollar threshold counts the entire bargain, with labor, services and materials added together. From there, the section drives key contract, payment, notice and change-order checkpoints.
That is only the starting point. The type of contract, the customer's situation or another statute can all change the paperwork, so confirm which rules govern the actual job.
The contract workflow at a glance
Put the agreement in writing
California requires a written contract for home improvement projects over $500. The contract and any changes to it must be in writing.
Define scope, materials, price and dates
Spell out the project, the significant materials and equipment, the contract price, and approximate start and completion dates.
Structure down payment and progress payments
As a general rule, a down payment may not exceed $1,000 or 10% of the contract price, whichever is less, and statutory exceptions can apply. When progress payments are used, a detailed payment schedule is required.
Document changes before changed work begins
Before any changed work gets done, the change order has to be in writing and signed.
California contractor guides
2026 California Home Improvement Contract Source Map
21 major California home improvement contract checkpoints, each lined up with its statute, CSLB guidance, scope notes and a related contractor guide.
California Home Improvement Contract Software
How ContractBuilderAI takes your project details into a guided California contract workflow, with AI-assisted drafting, review checkpoints, e-signature and an audit trail.
California Change Order Software
Our workflow for change orders that stay tied to the project. Draft the change, check price and schedule effects, send it for signature and keep the executed PDF. The legal background is in the change order requirements guide below.
California Business & Professions Code §7159 Guide
Written for contractors: the statute behind California home improvement contract content, payments, notices, change orders and cancellation provisions.
California Home Improvement Contract Requirements
An overview of B&P §7159: required contract information, down payments and the progress payment schedule, required notices and written change orders.
California Home Improvement Contract Checklist
A 15-point check to go through before signing, from project details, price and payment stages to notices, change orders, signatures and final checks.
California Home Improvement Contract Template Guide
What goes into a California home improvement agreement, and why a static template only gets you partway.
California Home Improvement Contract Example
A fictional kitchen-remodel agreement, used to show how scope, price, payment stages, notices, changes and signatures fit together.
California Contract Start & Completion Dates
How §7159 handles substantial commencement, approximate start dates, approximate completion dates and later schedule changes.
California Home Improvement Salesperson Requirements
If a registered HIS is part of the sale, here's how registration, contractor association, contract information and verification fit into the California workflow.
California Contractor License Information
Which contractor name, business address and license number belong in the agreement, and how to check them against the CSLB record.
California Contract Insurance Disclosures
Where commercial general liability and workers' compensation insurance notices go in the home improvement contract, plus status selection, attachments and verification.
California Plans & Specifications in Home Improvement Contracts
Project descriptions, significant materials, plans, specifications and other incorporated documents: how they fit into the contract, and how to handle version control and later revisions.
When California Home Improvement Contracts Must Be in Writing
The over-$500 aggregate threshold, signatures, buyer-copy delivery, written changes, Service and Repair contracts and electronic signatures, all placed in the pre-work contract workflow.
California Service and Repair Contract Requirements
The four §7159.10 qualifying conditions, what the contract has to include, payment timing, and why missing the classification puts you back under the ordinary contract rules.
California Contractor Down Payment Limit
Working out the general $1,000-or-10% rule, what special-order materials do not change, and where the statutory exception comes in.
California Contractor Progress Payment Rules
Matching each dollar amount in the schedule to a project phase, work performed or materials delivered.
California Contractor Change Order Requirements
Documenting scope changes, price adjustments and any effect on progress payments or completion dates.
California Mechanics Lien Warning
Why home improvement contracts carry this warning, and where CSLB's mechanics-lien guidance lives.
California Contract Cancellation Rights
California has separate three-day, five-day and seven-day cancellation frameworks. This guide covers why, and why Service and Repair contracts need their own analysis.
Open CSLB's home improvement contract guidance ↗
A useful second check on the contract topics and contractor obligations summarized here, straight from CSLB's consumer guidance.
Read §7159 on California Legislative Information ↗
Skip the summary and read the current code section when you need the controlling statutory text.
How ContractBuilderAI fits
ContractBuilderAI is a guided workflow. It helps contractors gather project details, draft scope and materials, lay out payment schedules, work through review checkpoints, collect e-signatures and keep an audit trail.
Reviewing the contract and confirming which requirements apply to the project is still up to the contractor.
Official sources
- Contractors State License Board — What Is a Home Improvement Contract?
- California Legislature — Business and Professions Code §7159
- Contractors State License Board — Contracts and Binding Agreements
Curious how we keep primary sources, agency guidance, product claims and editorial explanation apart? It's laid out in our research & editorial standards.
Building California contracts should not start from a blank page.
ContractBuilderAI is opening a California private beta on November 1, 2026 for licensed home improvement contractors.
Apply for the California beta →