San Diego Home Improvement Consumer Guide | Murray Lampert
What San Diego homeowners need to know before hiring a contractor: license verification, California payment law, permit requirements, contract essentials, and the questions to ask before signing anything.
By Gregg Cantor, President & CEO, Murray Lampert Design, Build, Remodel | CA Lic. #458038
Most homeowners hire a contractor only a few times in their lives. Contractors work with homeowners every day. That experience gap is where problems start. I’ve been in this business for more than 40 years, and I put this guide together because the questions that protect homeowners are the same ones that good contractors welcome. If a contractor doesn’t welcome them, that tells you something.
Originally published January 2026. Updated November 2026.
Table of Contents
- How to Verify a Contractor’s License, Insurance and Bonding
- What Insurance Should a Contractor Carry?
- California Law on Down Payments and Progress Payments
- What a Home Improvement Contract Must Include
- What Projects Require Permits in San Diego?
- Questions to Ask Before Hiring a Contractor
- Red Flags to Watch For
- How to Compare Bids Fairly
- What to Expect During Construction
- General Contractor vs. Design-Build Firm
- Frequently Asked Questions
How to Verify a Contractor’s License, Insurance and Bonding in California
California requires any contractor performing work valued at $1,000 or more (combined labor and materials), or any work that requires a building permit, to hold a valid license from the California Contractors State License Board (CSLB). For residential remodeling, look for a Class B (General Building Contractor) license or a relevant specialty C-class license. It’s easy to research contractors, but it’s very important to confirm if the registered officers are actually running the company and not an unlicensed individual using their credentials.
To verify a license:
- Go to cslb.ca.gov and use the free License Check tool
- Search by contractor name, business name, or license number
- Confirm the license status is Active (not suspended, expired, or revoked)
- Make sure they have no citations.
- Confirm the license classification matches the work being performed
- Confirm bond and workers’ compensation insurance are current
I’ve seen homeowners skip this step and regret it. Unlicensed work exposes you to liability, failed inspections, and no legal recourse if something goes wrong.
What Insurance Should a Contractor Carry?
Four types of insurance matter for homeowners.
General Liability Insurance covers property damage and bodily injury that occur during the project. Ask for a certificate of insurance and request to be named as an additional insured for the duration of the work. This ensures that if damage occurs to your home or a neighbor’s property, the contractor’s policy responds.
Professional Liability Insurance covers errors, omissions, or negligence in the design and planning phase of your project. General liability does not cover design mistakes. If a structural detail is wrong or a specification leads to a code violation, that falls under professional liability. This coverage matters most when you are working with a firm that provides both design and construction services under one contract. Ask whether the firm carries it and request a certificate. Not every remodeling contractor offers design services, and some outsource design to a third party. In true design-build, you should choose a firm that carries this coverage for your protection.
Workers’ Compensation Insurance covers injuries to workers on your property. If a worker is injured on your job and the contractor has no workers’ comp coverage, you may be held liable. California requires contractors with employees to carry it. You can verify current coverage through CSLB’s license check tool.
A sole proprietor with no employees may be legally exempt from workers’ comp. If a contractor claims this exemption, ask for it in writing and understand that you are accepting some risk.
Builder Risk (Course of Construction Insurance) covers the structure and materials while the project is under construction against losses from fire, theft, vandalism, and certain weather events. Clarify in writing who carries this coverage before work begins. On some projects the contractor carries it; on others the homeowner is expected to extend their homeowners policy or purchase a separate policy. If neither party has it and a fire or storm damages the partially completed work, the financial exposure falls on whoever lacks coverage. Check with your homeowners insurance carrier before signing a contract, many policies have limitations on coverage during active construction.
California Law on Down Payments and Progress Payments
Under California Business and Professions Code §7159.5, a contractor cannot require a down payment exceeding 10% of the total contract price or $1,000, whichever is less, before work begins.
This is not a negotiating position. It is the law. I’ve seen contractors ask for 30, 40, even 50 percent upfront. That is a red flag regardless of what reason they give you.
Any contractor requesting more than the legal limit upfront, or asking for large lump sums before the work they cover has been completed, is not operating the way a professional firm should.
Progress payments (payments tied to specific construction milestones) are normal and appropriate. What to avoid:
- Payments that run ahead of completed work
- Cash-only requests with no written receipt
- Pressure to pay quickly to “lock in” materials or pricing
- Large final payments withheld until after move-in, which leaves the homeowner with no leverage if punch-list items are left incomplete
Keep a record of every payment and match it to a documented milestone in the contract.
What a Home Improvement Contract Must Include
California law (B&P Code §7159) sets minimum requirements for home improvement contracts. Any written contract for residential work exceeding $500 must include:
- Contractor’s name, address, and license number
- Owner’s name and property address
- A description of the work to be performed
- A list of materials (or reference to specifications)
- Total contract price
- Payment schedule tied to milestones, not to calendar dates
- Estimated start and substantial completion dates
- Notice of the homeowner’s right to cancel within three business days, or five business days for homeowners 65 and older (for contracts signed at your home)
- A statement that the contractor will obtain all required permits
What a thorough contract also includes, beyond the legal minimum:
- A detailed, room-by-room or system-by-system scope of work
- A written change order process describing how changes are requested, priced, and approved before any work deviating from the original scope proceeds
- A lien release process documenting that subcontractors and material suppliers have been paid, protecting you from mechanic’s liens filed against your property
- Warranty terms for both labor and materials, with specific durations
- A process for resolving disputes
Vague contracts are the single most common cause of construction disputes. I’ve seen it play out too many times. If a contractor resists putting the details in writing, that resistance is telling you something important.
What Projects Require Permits in San Diego?
Most structural, electrical, mechanical, and plumbing work requires a permit. Common projects that trigger permit requirements include:
- Kitchen and bathroom remodels involving plumbing or electrical changes
- Room additions and accessory dwelling units (ADUs)
- Structural modifications, including opening, relocating, or removing walls
- Roof replacements (verify with the City based on scope)
- Electrical panel upgrades
- HVAC system replacement or new installations
- Water heater replacements (in most cases)
- Window replacements involving structural changes
Why permits matter to you as a homeowner:
- Work done without permits may need to be demolished and rebuilt to pass inspection when you sell the property
- Unpermitted work may not be covered by homeowner’s insurance
- Permits ensure inspections by a licensed third party, not just the contractor’s own assessment
The City of San Diego Development Services Department handles residential permits. You can look up permit history for any property at sandiego.gov/development-services.
A contractor who suggests skipping permits to save money is transferring risk and cost to you. Full stop.
Questions to Ask Before Hiring a Contractor
These are the questions worth asking before you sign anything. Good contractors have good answers. The ones who don’t are showing you who they are.
On licensing and insurance:
- Verify who the owner of the company is and make sure they are licensed.
- Do you carry general liability and workers’ compensation insurance? Can I receive a certificate of insurance naming me as an additional insured?
- Can I verify your license number on the CSLB website before we proceed?
On scope and contract:
- Will you provide a detailed written scope of work before I sign anything?
- How do you handle changes once construction begins? Is there a written change order process, and does work stop until a change order is approved?
- Who is responsible for pulling permits, and what happens if an inspection fails or requires corrective work?
On subcontractors:
- Will you use subcontractors? Which trades, and are they licensed?
- How do you ensure subcontractors and suppliers are paid so I am not exposed to mechanic’s liens?
On the project:
- Who is my single point of contact during construction?
- How often will I receive updates, and through what channel?
- Will there be a construction schedule published?
On the company:
- How long has your company been operating in San Diego?
- Can you provide references from projects comparable in scope and complexity to mine?
- What warranty do you provide on labor and materials, and what is your process for addressing warranty claims?
Red Flags to Watch For
- Requests for a down payment above the 10%/$1,000 legal limit
- Pressure to sign quickly or “before the price goes up” before a written scope has been provided
- Scope of work that is verbal only, or a contract that is vague on materials and specifications
- No mention of permits, or a suggestion that permits can be skipped to save money or time
- Inability or unwillingness to provide proof of license, insurance, or references
- No physical business address, only a mobile number or P.O. box
- Bids that are significantly lower than others without a clear explanation
On bids: a substantially lower number usually reflects scope that has been omitted, not better efficiency. Ask what is not included before concluding it is a better deal.
How to Compare Bids Fairly
Price comparisons between contractor bids are only valid when the bids cover the same scope. In practice, they rarely do. This is one of the most common traps homeowners fall into.
Before comparing numbers:
- Confirm that each bid is based on an identical written scope of work
- Ask each contractor to separate labor, materials, and overhead
- Ask specifically what is not included in each bid
- Confirm that permits and inspections are included, or ask for a separate permit allowance
- Clarify how each contractor handles change orders once work begins
A lower number may represent less work, lower-quality materials, no provision for permits, or exclusions buried in fine print. Compare bids at the scope level before the price level.
What to Expect During Construction and What Good Communication Looks Like
Signing the contract is where accountability either begins or disappears. A well-run project keeps the homeowner informed at every step, documents decisions in writing, and handles the unexpected without drama.
Communication cadence
Before construction begins, ask your contractor how they will communicate with you and how often. A professional firm should be able to answer specifically: daily logs, weekly summaries, scheduled check-in calls, or a combination. A vague answer like “we’ll be in touch” is a warning sign. You should never have to chase your contractor for a project update.
Project management portals
Many contractors now use cloud-based project management platforms that give homeowners 24/7 visibility into schedules, budgets, photos, selections, and outstanding decisions. When they work as intended, these tools are genuinely valuable. They create a written record of approvals, change orders, and communications that protects both parties.
The thing to understand is this: a portal is only as good as the company managing it. A system that is not actively updated, where field photos are missing, where selections are not logged, or where change orders appear after the fact rather than before work proceeds, is not transparency. It is the appearance of transparency. Ask to see a current active project as a reference. Ask how change orders are handled in the system and whether they require homeowner approval before work begins. The answers will tell you more than the software.
What happens when something unexpected is found
In renovation work, surprises are normal. Old electrical wiring, substandard prior work, hidden water damage, structural conditions that differ from what the drawings showed. These come up. What separates good contractors from bad ones is not whether surprises occur, but how they are handled.
A professional process looks like this: work stops at the point of discovery, the homeowner is notified and shown the condition, options are explained, a written change order is prepared with cost and timeline impact, and the homeowner approves before work resumes. That process protects you and creates a clear record.
A problematic process looks like this: work continues without notification, costs are presented after the fact, or the discovery becomes leverage to renegotiate the contract. Ask your contractor directly how they handle unexpected field conditions before you sign, and look for a specific, process-oriented answer.
Decisions and approvals
During construction, dozens of decisions will arise, some minor, some significant. Material substitutions, schedule changes, subcontractor substitutions, scope clarifications. Each one should be documented. In a well-run project, nothing that changes the scope, cost, or appearance of your project happens without your written approval.
What Is the Difference Between a General Contractor and a Design-Build Firm?
A general contractor manages construction. Design (architectural drawings, permits, material specifications) is typically handled by separate professionals the homeowner retains independently, or not at all. This creates coordination gaps and accountability questions when something goes wrong. When the architect and the contractor are separate, everyone has someone to point to.
A design-build firm handles design and construction under one contract, with one point of accountability. Architectural designers, interior designers, project managers, and field crews work from the same set of documents and answer to the same organization.
For complex residential projects like additions, whole-home remodels, and kitchen and bath renovations involving structural changes, the coordination advantage of design-build typically reduces change orders, delays, and disputes.
Neither model is right for every project. Understanding the difference helps you ask the right questions about how your project will be managed, and who is accountable when something does not go as planned.
Frequently Asked Questions
How do I verify a contractor is licensed in California?
Go to cslb.ca.gov and use the free License Check tool. Search by the contractor's name, business name, or license number. Confirm the license is Active, that the classification matches the work being done, and that bond and workers' compensation insurance are current. When meeting a contractor in person, ask to see their pocket license and a valid photo ID.
How much can a contractor legally ask for upfront in California?
Under California Business and Professions Code Section 7159.5, a contractor cannot require a down payment exceeding 10% of the total contract price or $1,000, whichever is less, before work begins. This is California law. Any contractor requesting more than this amount upfront should be treated as a red flag.
What must a home improvement contract include in California?
California B&P Code Section 7159 requires written contracts for any home improvement work over $500. Required elements include: contractor name, address, and license number; property owner information; description of work; materials list; total price; payment schedule tied to milestones; estimated start and completion dates; notice of the homeowner's three-day right to cancel (five business days for homeowners 65 and older); and a statement that the contractor will obtain required permits.
What projects require permits in San Diego?
Most structural, electrical, mechanical, and plumbing work requires a permit in San Diego. This includes kitchen and bathroom remodels involving plumbing or electrical changes, room additions, ADU construction, wall removal or relocation, electrical panel upgrades, HVAC replacements, and roof replacements. Work done without permits can create problems at resale and may not be covered by homeowner's insurance.
What are the biggest red flags when hiring a contractor in San Diego?
Key red flags include: requests for a down payment above the 10%/$1,000 legal limit; pressure to sign before a written scope of work has been provided; a vague or verbal-only contract; suggestions to skip permits; inability to provide proof of license, insurance, or references; no physical business address; and bids significantly lower than others without explanation. A substantially lower bid usually reflects omitted scope, not better pricing.
What is the difference between a general contractor and a design-build firm?
A general contractor manages construction but typically does not handle design. A design-build firm handles both design and construction under one contract, with one point of accountability. For complex residential projects like additions, whole-home remodels, and kitchen and bath renovations involving structural changes, the integrated approach of design-build reduces coordination gaps, change orders, and disputes.
How should a contractor communicate with me during a remodeling project?
A professional contractor should provide regular updates and give you a clear answer before work begins about how communication will work. Many firms now offer homeowner portals with 24/7 access to schedules, photos, budgets, and decisions. These tools are genuinely useful when actively managed. Ask to see an active project reference and ask how change orders are handled in the system before taking a portal at face value.
What happens when a contractor finds something unexpected during a remodel?
Surprises are normal in renovation work. What matters is how the contractor handles them. In a professional process: work stops, the homeowner is notified and shown the condition, options are explained, a written change order is prepared with cost and timeline impact, and the homeowner approves before work resumes. Red flags include work continuing without notification, costs presented after the fact, or discoveries used as leverage to renegotiate the contract.
What is a mechanic's lien and how do I protect myself?
A mechanic's lien allows subcontractors and material suppliers to file a claim against your property if they are not paid, even if you paid the general contractor in full. To protect yourself, require conditional lien waivers from all subcontractors and suppliers at each payment milestone, and unconditional lien waivers from all parties upon final payment. A well-run contractor will have a lien release process built into their payment workflow.
Ready to put this guide to work?
Murray Lampert has served San Diego homeowners since 1975 and welcomes every question in this guide. Tell us about your home and what you are hoping to accomplish.
Murray Lampert Design, Build, Remodel has served San Diego homeowners since 1975. CA Lic. #458038. A+ BBB rating since 1976. We specialize in fully permitted kitchen remodels, room additions, whole-home remodels, and ADU construction, all designed in-house by our architectural and interior design team.