Garage Conversion Contractor Warning Signs Every Homeowner Should Know

Garage Conversion Contractor Warning Signs Every Homeowner Should Know

The phrase “we’ll figure out the details as we go” has cost Los Angeles homeowners tens of thousands of dollars in garage conversion disputes. It sounds reasonable, almost collaborative, like the contractor is being flexible. It is not. It’s the verbal equivalent of signing a blank check. This guide translates the polite-sounding contractor phrases that precede a project going sideways, so you can spot trouble before a wall is open and your savings are gone. For more guides & resources, visit our blog. We’ll cover what a real license check looks like on the CSLB website, how the unpermitted work trap plays out in Los Angeles County, what a legitimate written contract must contain under California law, and three questions that expose whether a contractor actually does garage conversions or is figuring it out on your dime.

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Quick Answer

The biggest garage conversion contractor warning signs are verbal: “ballpark estimate,” “we can sort permits after we start,” and “depends on what we find.” Any contractor who won’t put a written, fixed price and a written scope of work in front of you before work begins is shifting risk onto you. A legitimate Garage Conversion Contractor holds a California B General Building license (or a C-5 Framing license for the framing scope), pulls permits before work starts, and gives you a contract that itemizes the full job, the payment schedule, and the warranty in writing.

Table of Contents

• Translating Contractor-Speak: The Phrases That Cost You Money
• How to Verify a Contractor’s License in California (and What B and C-5 Actually Mean)
• The Unpermitted Work Trap: What Skipping Permits Does to Your Title and Insurance in LA County
• What a Real Written Contract for a Garage Conversion Must Contain Under California Law
• Three Questions to Ask Every Contractor on the First Call
• Payment Schedule Red Flags: When a Down Payment Becomes a Warning Sign
• When a Contractor Refuses to Name the Products They Use
• Common Mistakes to Avoid
• When to Call a Professional
• Frequently Asked Questions
• The Bottom Line

Translating Contractor-Speak: The Phrases That Cost You Money

Most warning signs arrive dressed as reasonable, even helpful, statements. A contractor who says “we’ll work with you on the price as the job develops” sounds accommodating. What he’s really saying is that his initial number was too low to win the job and he intends to recover the difference through change orders once your garage is torn apart and you have no leverage. We’ve seen Los Angeles homeowners sign a one-page “proposal” for a 400-square-foot garage conversion, then receive a change order for foundation work, electrical upgrades, and drywall that doubled the price before insulation went in.

Here are the phrases that should make you pause, and what each one means in plain English:

• “Ballpark estimate” – This means the contractor has not done the detailed takeoff required to know what your job actually costs. A ballpark for a garage conversion in Los Angeles might sound like $80,000, but once the contractor does real math, that number tends to drift toward $120,000 or more. Ask when the fixed written price will be ready. If the answer is “after we open the walls,” that is not a price, that is an open tab.
• “Depends on what we find” – True for rot or hidden termite damage, which is why a good contract includes a contingency section with pre-agreed unit prices. But when this phrase applies to the entire scope, it means the contractor has not inspected the garage, has not measured the slab, and has not checked the electrical panel capacity. You are paying him to learn on your property.
• “We can sort permits after we start” – This is the single most expensive sentence in Los Angeles garage conversion work. Pulling permits after work has started in LA County means the work was unpermitted at the time it was done. If a building inspector sees it, you may be ordered to open walls or tear out work at your cost. More on this in the unpermitted section below.
• “We don’t really need a contract for something this size” – California law requires a written contract for home improvement work over $500. A garage conversion is never under that threshold. If a contractor resists putting terms in writing, he is not doing you a favor by saving paperwork. He is removing the document that protects you.
• “My usual subs will handle that” – Subcontractors are normal. What matters is who is licensed, who is paying them, and who is liable if they are injured on your property. A contractor who cannot name his electrician, his plumber, or his framing crew before you sign is hoping nothing goes wrong. You need names and license numbers in the contract.

Every one of these phrases shifts financial risk from the contractor to you. A contractor operating under The Kingswell Guarantee does the opposite: the written price comes before the work starts, and the written guarantee is in your hand before a single nail is driven. That is the standard to hold every contractor to, whether you hire us or not.

How to Verify a Contractor’s License in California (and What B and C-5 Actually Mean)

Checking a license takes five minutes and saves more money than any other single action in the garage conversion process. Go to the CSLB website at cslb.ca.gov, click “Check a License,” and enter the contractor’s name or license number. The page that comes up tells you the license classification, the issue date, the expiration date, whether workers’ compensation insurance is on file, and whether any disciplinary actions or complaints have been filed. Do not skip this step because the contractor “seems nice.” Nice is not a license.

The classifications matter because not every California contractor license covers garage conversion work:

• B – General Building Contractor: This is the primary classification for a garage conversion. A B license authorizes the contractor to manage the full project: framing, drywall, windows, doors, and the coordination of subcontractors for electrical, plumbing, and mechanical work. If you hire one contractor to run the whole conversion, they should hold a B license.
• C-5 – Framing Contractor: This covers rough carpentry and framing only. A C-5 holder can legally frame your new walls and roof, but they cannot run the project, pull the building permit for the whole conversion, or contract for plumbing and electrical work. Some contractors will show you a C-5 license and tell you it’s “the same thing.” It is not.
• C-10 – Electrical Contractor: Needed for the electrical panel upgrade, new circuits, and wiring for the converted space. A B license holder can subcontract this work but cannot legally do it themselves without a C-10 or acting under a B license’s limited scope in certain conditions. Ask who will be doing the electrical work and get their license number.
• C-36 – Plumbing Contractor: If you are adding a bathroom or kitchenette to the garage, plumbing work is required. Again, subcontracted under the B license is standard, but the person doing the work must be licensed.

The CSLB page also shows whether the contractor has workers’ compensation insurance. If the answer is no and the contractor says “my guys are fine, they’re all independent,” walk away. If an uninsured worker is injured on your Los Angeles property, you can be liable, and your homeowners insurance may not cover it. Verify every contractor and every named subcontractor before you sign. In our experience running garage conversions across Los Angeles, the contractors who welcome a license check are the ones who finish projects. The ones who get defensive are telling you something.

The Unpermitted Work Trap: What Skipping Permits Does to Your Title and Insurance in LA County

Some contractors pitch skipping permits as a savings opportunity: “We can save you the permit fees and get this done faster if we don’t involve the city.” The permit fees on a garage conversion in Los Angeles are a few thousand dollars depending on scope. The cost of unpermitted work, when it is discovered, starts in the tens of thousands and climbs from there. This is not a savings play. It is a transfer of catastrophic risk onto you.

Here is what actually happens with unpermitted garage conversions in Los Angeles County:

1. Your property title gets flagged. When you sell the house, the seller’s disclosure asks whether all work was performed with permits. You now have to disclose an unpermitted garage conversion, which either scares off buyers or becomes a negotiation point that costs you more than the permit ever would. Many buyers’ lenders refuse to finance homes with unpermitted square footage.
2. Your insurance exposure changes. If an unpermitted garage conversion causes a fire or a water leak that damages the main house, your insurance company can deny the claim based on unpermitted work. The electrical wiring in a converted garage, if never inspected, is a common cause of claims that get denied.
3. LA County catches it through routine triggers. Aerial photography, property tax reassessments, neighbor complaints, and even smart meter data can flag a garage that has been converted without permits. When the Los Angeles Department of Building and Safety comes out, the inspector can demand that walls be opened, that work be removed, and that a retroactive permit be obtained, which costs more than the original permit would have.
4. The retroactive permit is more expensive, not less. You pay double permit fees in some cases, plus the cost of opening walls to expose framing, wiring, and plumbing for inspection, plus the cost of fixing anything that was not up to code. The savings of skipping permits evaporates and then some.

We have had homeowners come to us with partially completed garage conversions from other contractors that were never permitted. In those cases, the first job is often stopping further unpermitted work, documenting what exists, and working with the city to bring the project into compliance. It is slower and more expensive than doing it right in the first place. A real Los Angeles garage conversion contractor pulls permits before any physical work begins. Full stop.

What a Real Written Contract for a Garage Conversion Must Contain Under California Law

California Business and Professions Code Section 7159 governs home improvement contracts. A garage conversion is a home improvement contract, and the law is specific about what must appear in writing. A one-page estimate with a number at the bottom is not a contract. Here is what a legitimate written contract for a Los Angeles garage conversion must include:

• A detailed description of the work – not “convert garage to ADU,” but the full scope: demolition of the existing garage door, installation of a new wall and windows at that opening, framing of a bathroom, rough plumbing, electrical panel upgrade from 100 to 200 amps, insulation, drywall, flooring, paint, and trim. If the scope is vague, the price is fictional.
• The total contract price – in a dollar amount, not a range. A range like “$80,000 to $110,000” is a forecast, not a price.
• The payment schedule – California limits the down payment on a home improvement contract to 10% of the total price or $1,000, whichever is less. If a contractor asks for 50% up front, that is a violation and a red flag.
• The approximate start date and estimated completion date – a “defined arrival window” is not optional. Every reasonable contract includes when work begins and approximately when it ends.
• The names and license numbers of all subcontractors – if the contractor will sub out electrical, plumbing, or HVAC work, those names and license numbers should be in the contract or provided as a written addendum before that work starts.
• A change order procedure – changes happen on every job. The contract must say that any change to the scope or price is documented in writing and signed by both parties before the change work begins. Verbal change orders are how $100,000 projects become $140,000 projects without anyone realizing what happened until the final invoice.
• A written warranty or guarantee – what is covered, for how long, and what the homeowner needs to do to trigger a repair. Lodgewick ADU Builders provides a written guarantee on every project and a free return visit if the work fails within the 365-day guarantee period. That guarantee is in writing before work starts, not mentioned verbally after the final check clears.

A contractor who hands you a two-paragraph “agreement” and calls it a contract is not doing business in a way that protects you. You want a document that reads like it was written by someone who has been through a dispute before, because that person writes contracts that prevent them.

Three Questions to Ask Every Contractor on the First Call

You can identify a contractor who actually does garage conversions versus one who is figuring it out on your dime with three questions on the first call. These questions do not require any construction knowledge. They just require noticing how the person answers.

1. “What’s your process for an attached garage conversion when the slab is lower than the house floor?” Any contractor who does garage conversions regularly in Los Angeles has dealt with this. The garage slab is almost always stepped down below the main house floor. A professional answer references raising the floor with sleepers or a concrete pour, or using a step-up transition, and describes the door threshold details. A contractor who hesitates, says “we’ll see when we get there,” or changes the subject is not experienced in this specific type of work.
2. “Will my electrical panel handle the new load, and what happens if it won’t?” A garage conversion with a bathroom or kitchenette almost always requires new circuits, and many older Los Angeles homes have 100-amp panels that cannot handle the added load. An experienced contractor answers with: “We’ll do a load calculation during the estimate, and if the panel needs an upgrade to 200 amps, we’ll include that in the written price.” A contractor who says “the electrician will figure that out” is admitting that a cost discovery is coming later, after the contract is signed.
3. “Can you show me a garage conversion you completed in the last 12 months, and can I talk to that homeowner?” A contractor who does this work regularly can name a recent project, give you the neighborhood, and often arrange a reference call. A contractor who gives you photos from five years ago and says “the clients moved” is not actively doing garage conversions. In our experience across Los Angeles, the contractors with current, verifiable references are the ones who finish on price and on schedule.

These questions are not gotchas. They are mirrors. They reflect back whether the person on the other end of the phone has done this specific work, recently, in this city, for homeowners like you.

Payment Schedule Red Flags: When a Down Payment Becomes a Warning Sign

The way a contractor structures payments tells you more about their financial position than their website does. A contractor asking for 40% or 50% before work starts is financing his last job with your deposit. That is how the cycle goes: he completes the job, collects the final payment, starts the next job, runs short, and needs the next homeowner’s deposit to keep the previous job moving. You do not want to be in that chain.

California law caps the down payment at 10% of the contract price or $1,000, whichever is less. After that, payments should be tied to completed milestones: demolition complete, framing inspected and passed, rough electrical and plumbing inspected, drywall complete, and final inspection passed. See our Home Addition Contractor Maintenance Schedule: What to Do and When for a full timeline. Each payment should reflect work that is actually done and verifiable. If a contractor wants 30% up front plus 30% “at framing” plus 30% “at drywall” with only 10% held until the end, the math tells you where the risk sits: you are paying almost everything before the job is finished, which means the contractor has no financial incentive to finish well. A contractor who holds a meaningful amount until the final inspection passes has skin in the game through the end of the project.

Also look at what happens if you change your mind. A contract that says any cancellation forfeits your entire deposit, even before work is scheduled, is predatory. A reasonable contract returns unused portions of the deposit and charges only for permits pulled, plans drawn, and materials already ordered for your specific job. Ask about cancellation before you sign, not after. It is one of the fastest ways to see what kind of business you are dealing with.

When a Contractor Refuses to Name the Products They Use

Ask a contractor what brand of windows they will install in your garage conversion. Ask what insulation they will use in the walls. Ask who manufactures the exterior siding. The answer you want is specific, because specific product names mean the contractor has standards, and standards mean the contractor can be held accountable. The answer you should fear is “whatever the supplier has” or “we’ll pick that out later.” That means the cheapest available option will be installed, and you will pay for it at whatever markup the contractor chooses.

This matters especially in Los Angeles because of the climate and the code. Garage conversions need insulation that meets Title 24 energy standards. They need windows with proper U-factors and solar heat gain coefficients for the Southern California climate. They need siding that survives the marine layer near the coast and the dry heat of the San Fernando Valley. Products like James Hardie fiber cement siding perform well in both conditions, which is why we specify it on many of our garage conversion projects.

For homeowners considering a prefab option, we work with established manufacturers like Abodu, Cover, and Dvele, which design units specifically for California building codes and ADU regulations. These are not the cheapest options, but they are known quantities with engineered specifications, which means fewer surprises during construction. A contractor who is willing to name the products he uses, from the framing lumber to the caulk, is telling you he is not afraid of accountability. A contractor who will not name products is telling you the same thing in reverse. We are a Garage Conversion Contractor in Los Angeles who puts product names in writing because that is what a written guarantee requires.

Common Mistakes to Avoid

• Not checking the CSLB license before the first meeting. The five-minute check saves you from weeks of heartbreak. A license number on a business card means nothing until you see it on cslb.ca.gov.
• Signing a “proposal” instead of a contract. In Los Angeles garage conversion disputes, the homeowner who signed a one-page proposal almost always loses the argument about what was included. A proposal is a conversation starter, not a legal document.
• Accepting a price that changes “based on what we find” without a written contingency clause. Contingencies are normal. Open-ended pricing is not. The difference is whether the contract states the unit price for discovered rot, for a panel upgrade, or for a slab repair before the work begins.
• Skipping the reference visit. Photos will not tell you whether the homeowner’s garage conversion leaked, whether the inspector passed it the first time, or whether the contractor returned calls after the final payment. A 15-minute phone call with a past client will.
• Paying too much up front. If the contractor needs 30% or more before work starts, he is using your money to pay for someone else’s job. The California 10% limit is not a suggestion.
• Letting the contractor pick the permit path. The decision to pull permits is yours, and there is only one correct answer for a garage conversion in Los Angeles: yes, permits are pulled before work begins. A contractor who splits the difference by “letting you decide” is offloading liability onto you.
• Not getting the warranty in writing. A verbal promise to “come back if anything’s wrong” evaporates. The 365-Day Done Right Promise is a written document because a verbal promise is worth exactly nothing in a dispute.

When to Call a Professional

Some garage conversion warning signs are not subtle. Walk away if a contractor asks for more than the 10% California down payment, refuses to pull permits, will not put a fixed price in writing, or cannot name his subcontractors. But the subtler signs matter too: the contractor who will not show you a recent project, the one who shrugs at your panel capacity question, the one who says the contract is “just a formality.” These are the projects that end up in disputes, and in Los Angeles, a garage conversion dispute often means a garage that sits half-finished for months while the contractor has moved on to the next job. If you are interviewing contractors and getting that feeling in your stomach that something is off, trust it and keep looking. Lodgewick ADU Builders offers free estimates in Los Angeles – call (254) 602-5618 and you will get a written price, a written scope of work, and a written guarantee before you commit to anything.

Frequently Asked Questions

The Bottom Line

Most garage conversion disasters in Los Angeles start with a phrase that sounded reasonable at the time. “We’ll figure it out as we go” is not a plan. It is an invoice waiting to happen. The contractors who do this work well put everything in writing before they start: the price, the scope, the schedule, the names of the subcontractors, and the guarantee. They hold a B license, pull permits before work begins, and can show you a recent garage conversion with a homeowner willing to vouch for them. If a contractor will not do those things, the warning sign is not subtle. It is the whole conversation. Our team at Lodgewick ADU Builders has been converting garages in Los Angeles since 2010 under The Kingswell Guarantee. We are ADU Builders in Los Angeles who put the written price, the defined arrival window, the clean job site, and the written guarantee in your hands before work starts. If you are considering a garage conversion and want a straight answer, call (254) 602-5618 for a free estimate. Russ will walk you through what a real, permitted, written-price project looks like.

Home Addition Contractor in Los Angeles services are also available if your project scope grows beyond the garage.

Written by Russ Delmar, Owner at Lodgewick ADU Builders, serving Los Angeles since 2010.