California Home Repairs, Remodeling & Contractor Hiring Guide

California Projects Need Careful Planning

California uses a statewide code system, but your city or county building department still plays a major role in issuing permits, reviewing plans, performing inspections, and enforcing local requirements.

For many projects, homeowners may need to account for:

• Contractor licensing and proper license classification
• City or county permit requirements
• Plan review and inspections
• California Building Standards Code requirements, commonly called Title 24
• Energy-efficiency and CALGreen requirements
• Wildfire-zone or fire-hardening requirements
• Earthquake and structural safety considerations
• Coastal, hillside, floodplain, or historic-district restrictions
• HOA or condominium-association approval
• Utility requirements for solar, battery storage, EV chargers, or electrical upgrades
• Drainage, grading, retaining-wall, and stormwater requirements
• Accessibility requirements for certain multi-family or commercial projects
• Property-line, setback, zoning, and ADU rules

Start With Your Property

Before requesting estimates, identify the property conditions that could affect cost, design, permitting, or contractor selection. California homes range from older urban houses and hillside properties to coastal condos, wildfire-zone homes, suburban tract homes, rental properties, and rural properties with wells, septic systems, or detached structures.

A qualified contractor should look beyond the visible work. They should identify permit needs, existing conditions, code requirements, access issues, drainage concerns, structural questions, and other factors that could affect the final price or schedule.

California Contractors Must Be Licensed

California generally requires a valid contractor license for construction, alteration, home-improvement, or repair work when the combined value of labor and materials is $1,000 or more. A license is also generally required when the work requires a building permit, regardless of the project value.

Contractor licensing is administered by the California Contractors State License Board, commonly called the CSLB.

Licensed contractors are required to maintain a contractor bond, but a bond is not the same as general liability insurance. Ask the contractor for proof of general liability insurance and confirm workers’ compensation coverage when the contractor has employees. The CSLB license lookup can also help homeowners review the contractor’s licensing bond and workers’ compensation information.

Verify the License Before Signing

Before you sign a contract or pay a deposit, verify the contractor through the CSLB. Do not rely only on a truck decal, business card, online profile, or a license number printed on an estimate.

Use the CSLB’s license lookup tool to confirm that the license is active, the legal business name matches the contract, the contractor holds the appropriate classification for the work, and the available bond, workers’ compensation, and disciplinary information does not raise concerns.

A valid license number is not enough by itself. The contractor should also hold the right classification for the work. Electrical contractors, plumbers, HVAC companies, roofers, landscapers, solar installers, and general contractors may hold different license classifications depending on the project.

Get Clear Written Estimates

For a major repair, remodel, addition, outdoor improvement, or equipment installation, compare written estimates rather than relying on a verbal price.

A good estimate should make it easy to compare contractors on more than the total cost. It should explain:

• The scope of work
• Materials, brands, models, colors, and allowances
• Labor included in the price
• Demolition, disposal, cleanup, and site protection
• Permit and inspection responsibility
• Known exclusions
• Estimated start and completion dates
• Warranty details
• Payment schedule
• Who will complete the work, including subcontractors
• Conditions that could create additional charges

The lowest bid is not always the best value. A lower quote may leave out permits, cleanup, quality materials, warranty coverage, insurance, project management, or work another contractor included. Compare the scope line by line before making a decision.

California Home-Improvement Contract Rules

California generally requires a written home-improvement contract for projects with a combined labor-and-materials cost of more than $500. The contract and any changes to it should be written, legible, and easy to understand. Review the CSLB’s home-improvement contract guidance before signing.

A clear written contract is one of the best protections a homeowner has.

Your contract should include:

• Contractor name, business address, phone number, email address, and license number
• Property address
• Detailed description of the work
• Materials, equipment, brands, models, and allowances
• Total contract price
• Deposit amount
• Payment schedule
• Estimated start and completion dates
• Permit and inspection responsibilities
• Subcontractor responsibilities
• Warranty terms
• Change-order process
• Cleanup and debris-removal responsibilities
• Required notices and cancellation information

Down Payments and Progress Payments

For many home-improvement contracts, the down payment cannot exceed $1,000 or 10% of the total contract price, whichever is less, unless a specific legal exception applies. After the deposit, payments should be connected to work, materials, or equipment identified in the contract.

The payment schedule should use exact dollar amounts rather than vague language such as “pay as work progresses.”

Good payment practices include:

• Avoid paying the full project price upfront
• Use traceable payment methods
• Tie progress payments to completed project milestones
• Keep copies of invoices, receipts, and payment confirmations
• Do not make final payment until the agreed work is substantially complete and required inspections have passed
• Ask for documentation or lien releases when appropriate, especially on larger projects with subcontractors and suppliers

Put Changes in Writing

Unexpected conditions can come up on almost any project. A contractor may find damaged framing, outdated wiring, plumbing problems, termite damage, drainage issues, permit requirements, or material shortages that affect the work.

If the scope, price, materials, or schedule changes, get a written change order before the additional work begins. The change order should explain what is changing, why it is necessary, the added or reduced cost, and any effect on the project schedule or payment plan.

Understand Cancellation Rights

Many eligible home-improvement contracts signed at the homeowner’s residence include a three-business-day right to cancel. California provides longer cancellation periods in some situations, including five days when the contracting homeowner is age 65 or older and seven days for certain contracts related to damage from a declared disaster.

There are exceptions, including certain emergency service-and-repair situations where the homeowner requests immediate work and the contractor begins service right away. Read the cancellation notice in the contract carefully. If you choose to cancel, follow the written instructions and keep proof that you sent the cancellation notice. The CSLB explains these rules in its home-improvement contract warnings and exceptions.

Permits, Inspections, and Owner-Builder Concerns

Permits help make sure work is reviewed for safety, structural integrity, energy performance, plumbing, electrical, mechanical, fire, and other requirements. Depending on the project, your local building department may require plans, calculations, product documentation, inspections, or approvals from other agencies.

Projects that commonly require permits include:

• Additions and structural remodels
• ADUs and garage conversions
• Electrical panel upgrades, rewiring, and EV chargers
• HVAC replacement and major ductwork
• Water heater replacement, gas piping, sewer-line work, and major plumbing changes
• Solar and battery storage
• Roof replacement or structural roof repairs
• Windows and exterior-door replacements in some jurisdictions
• Decks, patios, retaining walls, fences, pools, spas, and outdoor structures
• Major landscaping, grading, drainage, or hardscaping work

Be Careful With Owner-Builder Permits

Be cautious if a contractor asks you to pull an owner-builder permit while they manage and perform the work.

An owner-builder permit can place significant responsibilities on the homeowner. Depending on the project and jurisdiction, it may make you responsible for permit compliance, inspections, jobsite safety, workers, taxes, and other obligations that would normally be handled by a licensed contractor.

Before agreeing, ask:

• Why is the contractor not pulling the permit?
• Who will be listed on the permit?
• Who will supervise the work?
• Who is responsible if the project fails inspection?
• Who is responsible for workers on the property?
• Will the contractor provide a written contract and proof of insurance?
• Will the work be completed under the contractor’s license?

Your city or county building department can explain the local permit process and help clarify whether the contractor or homeowner should be listed as the permit applicant.

California Permit Resources

The local building department is the best place to confirm whether a project needs a permit, whether plans are required, what inspections will take place, and whether the contractor needs local registration.

California Building Codes at a Glance

California’s statewide building-code system is commonly called Title 24, or the California Building Standards Code. It covers a wide range of structural, plumbing, electrical, mechanical, fire, energy, and green-building requirements.

The 2025 California Building Standards Code took effect on January 1, 2026. Local governments enforce the statewide code and may adopt additional requirements based on local conditions. Review the California Building Standards Commission’s code resources for current statewide information.

Building codes are technical documents. Homeowners do not need to become code experts before hiring a contractor, but knowing which code areas may apply can help you ask better questions about permits, inspections, safety, energy performance, and project scope.

Understand Mechanics Liens and Preliminary Notices

For larger projects, such as remodeling, roofing, flooring, solar, ADU construction, foundation work, additions, or multi-trade renovations, homeowners should understand how mechanics liens work.

Save every notice you receive. Keep a record of who is working on the project, what payments have been made, and which suppliers are involved. The CSLB offers a helpful guide to preventing mechanics liens that explains steps homeowners can take during construction.

Good practices include:

• Ask the contractor who will be working on the project
• Keep copies of all contracts, invoices, notices, permits, and payment records
• Use traceable payment methods
• Ask whether subcontractors and suppliers have been paid before making later payments
• Request appropriate lien releases as payments are made
• Do not make final payment until the project is complete and payment obligations are clear

California Projects With Extra Rules

Statewide contractor and contract rules are only part of the picture. Some projects involve additional permit, inspection, design, energy, zoning, or environmental requirements.

• ADUs and garage conversions: These can involve zoning, setbacks, utility connections, fire safety, plan review, parking rules, and local ADU standards.
• Solar and battery storage: Projects may require electrical permits, utility coordination, structural review, equipment documentation, and local approval.
• Electrical-panel upgrades, EV chargers, and generators: These commonly require electrical permits and may involve service upgrades, load calculations, trenching, utility coordination, or inspections.
• HVAC replacement: Heating and cooling work may require mechanical permits, energy-code compliance, duct testing, equipment sizing, condensate planning, and inspections.
• Roofing and exterior work: Local requirements may address reroofing, structural conditions, drainage, fire-resistant materials, and wildfire-zone rules.
• Fire-prone locations: Homes in wildfire-risk areas may face stricter requirements for roofing, vents, decks, siding, windows, defensible space, and exterior materials.
• Coastal, hillside, historic, or flood-prone homes: These properties may need additional review before construction begins.
• Pools, spas, fences, and outdoor structures: Projects may involve safety barriers, electrical bonding, drainage, setbacks, inspections, and permits.
• Landscaping and hardscaping: Larger projects may involve grading, drainage, retaining walls, irrigation, tree removal, stormwater control, or water-efficiency requirements.

For project-specific answers, contact the building department where the property is located before work begins. Local agencies can explain permit requirements, plans, inspections, zoning, setbacks, grading, and other rules that may apply to your property.

Common California Remodeling and Upgrade Ideas

California homeowners often plan projects that improve space, comfort, energy performance, resilience, or long-term property value. The right project depends on your property, location, budget, and local requirements.

ADUs and Garage Conversions

ADUs, backyard cottages, and garage conversions can create space for family members, guests, rental income, or a home office. These projects can also be complex. Before hiring a contractor, ask about zoning, setbacks, utility connections, parking, fire safety, permits, structural requirements, and local ADU rules.

Kitchen and Bathroom Remodeling

Kitchen and bathroom projects may involve plumbing, electrical work, ventilation, waterproofing, cabinets, fixtures, flooring, lighting, appliances, and structural changes. Ask the contractor how they will handle permits, plumbing and electrical inspections, material allowances, and any hidden conditions found after demolition.

Indoor-Outdoor Improvements

California’s climate makes patios, outdoor kitchens, shade structures, pools, decks, landscaping, hardscaping, and sliding-door upgrades popular. These projects can involve setbacks, drainage, grading, electrical work, gas lines, pool-safety requirements, and local zoning rules.

Energy-Efficiency and Electrification Upgrades

Energy-related projects may include solar panels, battery storage, heat pumps, insulation, energy-efficient windows, electric water heaters, EV chargers, panel upgrades, smart thermostats, and improved ventilation. These upgrades can improve comfort and reduce energy use, but they may also trigger permit, electrical, mechanical, or Title 24 requirements.

Fire-Resistant Exterior Improvements

In wildfire-prone areas, homeowners may consider fire-resistant roofing, ember-resistant vents, noncombustible siding, upgraded windows, defensible-space landscaping, and fire-resistant deck materials. Ask the contractor whether the proposed materials are appropriate for your local fire-risk conditions and whether permits or product approvals are needed.

California Solar Projects

Rooftop solar is one of the most common upgrades California homeowners consider. The city or county where the home is located issues the permit, and California law requires local governments to offer an expedited permitting process for eligible small residential rooftop systems. Many jurisdictions now use online or automated tools such as SolarAPP+. Systems that don’t qualify for automation still go through the local expedited or standard plan-review process.

How a Solar Project Moves Forward

1. Site assessment and design. The contractor evaluates the roof, shading, structure, main electrical panel, and electrical load, then prepares the site plan, roof layout, attachment details, equipment specs, and electrical diagrams.
2. Local permit application. Most rooftop systems need at least building and electrical approval. Battery storage, main-panel upgrades, roof work, ground mounts, carports, and historic or hillside homes may trigger additional review.
3. Automated or expedited review. Standard residential designs may qualify for SolarAPP+, which checks the design against code automatically.
4. Utility interconnection. For a grid-connected system, the contractor applies to the utility, such as PG&E, Southern California Edison, SDG&E, Liberty, PacifiCorp, or Bear Valley Electric Service. This review is separate from the local permit.
5. Installation and inspection. After installation, the building department inspects roof attachments, clearances, wiring, grounding, disconnects, panel connections, labeling, and smoke and carbon-monoxide alarms when applicable.
6. Permission to Operate. Once the final inspection and required documents are complete, the utility authorizes the system to run.

Expect the installer to prepare and submit most permit and utility paperwork, and confirm that responsibility in the signed contract. In PG&E, SCE, and SDG&E territories, the solar provider must also collect your signed California Solar Consumer Protection Guide, the installation contract, and the CSLB Solar Energy System Disclosure Document as part of interconnection.

Who Can Install Solar

The California Public Utilities Commission advises homeowners to use a valid CSLB-licensed solar provider and installer. Three license classifications cover most residential solar work, depending on the scope.

Don’t assume the salesperson, marketing company, or financing company is the licensed installer. Before signing, confirm:

• The legal company named in the contract and its CSLB license number and classifications.
• The name and license number of the company that will actually install the system.
• Whether subcontractors will handle roofing, the electrical panel, or the battery.
• Who is responsible for permits, inspections, interconnection, and warranty service.

Bonds and Insurance for Solar Contractors

Every active CSLB license must be backed by a $25,000 contractor’s bond. A bond is not the same as liability insurance. It may cover certain qualifying claims, but it won’t necessarily protect against every type of property damage, injury, installation defect, or dispute. Before work starts, request and verify:

• Active CSLB license and bond status
• A general liability insurance certificate
• Workers’ compensation coverage, or a valid exemption if there are no employees
• Licenses and insurance for roofing, electrical, structural, or battery subcontractors
• Manufacturer-certified installer status, if it affects the equipment warranty

The CSLB license lookup shows bond and workers’ compensation status, so verify through the state database rather than relying only on a certificate from the salesperson.

Installing a Level 2 EV Charger in California

Home EV chargers are permitted through the local city or county building department. A new Level 2 charger, dedicated 240-volt circuit, new receptacle, hardwired charger, panel upgrade, or service change typically requires an electrical permit and inspection. Charger installations must comply with Article 625 of the California Electrical Code.

Who Can Install an EV Charger

The EV Charger Process

1. Hire and verify a C-10 contractor. Check the license through the CSLB.
2. Site assessment. The electrician reviews panel capacity, charger location and amperage, the conduit route, distance from the panel, and outdoor exposure.
3. Permit application. The contractor submits charger specs, panel photos, a load calculation, circuit details, and a site plan as required.
4. Installation. The contractor installs the dedicated circuit, breaker, wiring, conduit, receptacle or hardwired unit, and any electrical upgrades.
5. Final inspection. The inspector confirms the work meets the California Electrical Code, the approved plans, the manufacturer’s instructions, and local amendments.

Utility coordination is generally needed only for rate-plan enrollment, major service upgrades, a second meter, or solar and battery integration.

Before You Hire

Every C-10 contractor must hold an active CSLB license and maintain a contractor bond, but a bond is not general liability insurance. Verify:

• Active C-10 license and bond status
• Workers’ compensation coverage or a valid exemption
• A current general liability insurance certificate
• Experience with EV chargers, panel upgrades, and load calculations
• Who handles the permit and inspection
• Manufacturer-approved installation, if required for the warranty

California Contractor Hiring Checklist

• Verify the contractor’s active CSLB license.
• Confirm the license classification matches the work.
• Check that the legal business name matches the contract.
• Ask about general liability insurance and workers’ compensation coverage.
• Get detailed written estimates from more than one contractor for significant work.
• Compare scope, materials, permits, warranty, schedule, and exclusions—not just price.
• Confirm who will pull permits and schedule inspections.
• Avoid acting as an owner-builder unless you understand the responsibilities.
• Use a written contract for projects over $500.
• Confirm the deposit follows California’s legal limit.
• Make progress payments based on defined project milestones.
• Require written change orders before approving added work or costs.
• Understand cancellation rights before signing.
• Keep a complete project file with contracts, invoices, permits, inspections, notices, photos, and warranties.
• Ask about subcontractors, suppliers, and lien protections for larger projects.
• For solar, confirm the installer’s C-46, C-10, or B license and wait for utility Permission to Operate before turning the system on.
• Do not make final payment until agreed work is complete and required inspections are approved.

Frequently Asked Questions