Comparisons
September 11, 2026
Not every contractor who shows up with a business card and a low bid is the right call. Here's what to watch before you sign anything.
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You’ve decided to add space to your home. Maybe it’s a bedroom, a bigger kitchen, or a full second-story expansion. Whatever the scope, you’ve started getting quotes — and now you’re staring at a list of names, prices, and promises that all start to sound the same.
Here’s the honest truth: most homeowners don’t know what to look for until something goes wrong. And by then, they’ve already signed a contract, handed over a deposit, and watched a crew show up twice before disappearing for three weeks. This page exists to help you avoid that. We’ll cover the real red flags — not the obvious ones, but the ones that actually predict problems.
The contractor market in San Diego County is crowded. Some of the companies you’ll find online have been doing this work for decades. Others got a truck wrap last month. From the outside, they can look identical — same professional website, same five-star reviews, same confident pitch.
What separates them isn’t how they present themselves. It’s what we do before the first nail goes in. How we handle the estimate, whether we pull permits, who actually shows up to do the work — these are the things that determine whether your project finishes on time and on budget, or turns into the story you tell at dinner parties for the wrong reasons.
California requires any contractor performing work totaling $1,000 or more in combined labor and materials to hold a valid license through the Contractors State License Board — the CSLB. For a home addition, which involves framing, electrical, plumbing, and exterior work all under one scope, that typically means a Class B General Contractor license. This is not a formality. It’s the legal floor for anyone doing this kind of work on your home.
The part most homeowners skip: you can verify any general contractor San Diego license at CSLB.ca.gov in about 30 seconds. You type in their name or license number and see whether they’re active, bonded, and in good standing. If a contractor hesitates when you ask for their license number, that hesitation is your answer.
The CSLB doesn’t just issue licenses — they enforce them. In San Diego County specifically, we’ve seen multiple undercover sting operations targeting unlicensed contractors. In 2018, 17 unlicensed contractors were cited in a single operation in Santee. In 2019, 26 individuals were referred to the San Diego County District Attorney for possible criminal prosecution following a sting in El Cajon. In 2022, an unlicensed contractor was caught offering an $11,245 bid during a Vista operation. These aren’t distant cautionary tales — they happened in cities that are likely within 20 miles of your home.
A license doesn’t guarantee quality, but the absence of one guarantees legal exposure for you. If an unlicensed contractor or one of their workers gets injured on your property and they don’t carry Workers’ Compensation insurance, you can be held liable as the de facto employer under California law. That’s not a technicality — it’s a real financial risk that has cost San Diego homeowners significantly.
Here’s a specific, legally grounded fact that most homeowners don’t know going into a contractor search: California law caps what a contractor can ask for upfront. Under Business and Professions Code §7159.5, a contractor may only request a deposit of the lesser of 10% of the total contract price or $1,000 — whichever is smaller — before work begins. On a $100,000 home addition, the maximum legal deposit is $1,000. Not $10,000. Not $20,000. One thousand dollars.
This matters because large upfront deposits are one of the most reliable predictors of contractor fraud. A real San Diego homeowner found this out the hard way when she hired a contractor advertised as “the No. 1 remodeling firm in San Diego” — based on radio ads — to build a two-story addition onto her 1940s home. She was asked for $30,000 before work started. She paid it. What followed was shoddy construction, water leaks, mold, and a string of failed inspections. Every major red flag that exists in this industry showed up in that one project.
After the initial deposit, any subsequent payments should be tied to completed work — not to future work, not to materials that haven’t arrived yet, not to a calendar date. A legitimate contractor will structure payments around milestones: foundation complete, framing complete, exterior closed in. If a contractor wants a large second payment before the first phase is finished, that’s the moment to slow down and ask questions.
The San Diego County District Attorney’s Consumer Protection Unit documents a spike in home improvement scam cases every spring — and home additions are consistently among the most problematic categories. Spring is when homeowners start planning projects, which is also when the opportunists show up. If you’re getting quotes between March and June, that context is worth keeping in mind.
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Most of the risk in hiring a contractor for an addition can be identified before a single tool touches your property. The estimate phase — how we communicate, what we put in writing, and what we’re willing to explain — tells you almost everything you need to know about how the project itself will go.
A contractor who gives you a vague ballpark figure and pressures you to sign quickly is showing you exactly how they’ll handle a change order, a delay, or a dispute. A contractor who gives you a detailed, line-itemized estimate and walks you through it is showing you something different. Pay attention to which one you’re dealing with.
This is a question a lot of homeowners forget to ask, and it matters more than almost anything else on the list. When you hire a general contractor for a home addition, you’re often not hiring the people who will actually build it. Many GCs function as project managers who subcontract each phase — framing to one crew, electrical to another, exterior work to a third. That’s a legal and common practice when those subcontractors are properly licensed for their specific trades.
The problem is when those subcontractors aren’t licensed — or when the homeowner has no idea who they are until they show up at the front door. An unlicensed electrical subcontractor isn’t a specialist. They’re a liability. If they’re injured on your property, the same Workers’ Comp exposure applies. And if their work fails inspection, you’re the one dealing with the consequences.
The cleaner version of this is a contractor who uses direct employee crews — people who work for the company, not independent workers brought in job by job. It means the person you talked to in the estimate phase is accountable for the people doing the work. It means there’s no gap between what was promised and who shows up. When a contractor tells you they use no subcontractors and their crew works one project at a time, that’s a meaningful operational commitment — not just a marketing line. It means your project gets consistent attention from a team that’s actually invested in finishing it well, because their next job depends on this one going right.
In San Diego County’s competitive market, where a home addition can run anywhere from $40,000 to well over $300,000 based on permit records from the City of San Diego Development Services, the accountability structure of the crew doing the work is not a minor detail.
Permits are not optional for a home addition in San Diego County. Any project that adds square footage to a home requires a permit, a plan check, and inspections at multiple stages of construction. This is true regardless of the size of the addition. There is no threshold below which you can skip the permit process for structural work.
The reason this matters beyond legal compliance: unpermitted additions are a financial time bomb. When you go to sell your home, a buyer’s inspector will flag unpermitted work. Lenders may refuse to finance a home with unpermitted square footage. In some cases, the city can require the work to be demolished or brought up to code at the current owner’s expense — meaning your expense, even if you didn’t build it. In a market where San Diego County homes are valued at $900,000 to $1.2 million in many neighborhoods, that exposure is significant.
A contractor who handles permits and includes permit costs in the estimate — as a named line item, not buried in a lump-sum figure — is telling you something important about how they operate. It means there are no surprises after you’ve signed. It also means they’re willing to stand behind the work publicly, because permitted work is inspected work. A contractor who suggests pulling permits later, or who quotes you a lower number and then mentions permits separately after you’ve agreed, is showing you a pattern that tends to repeat throughout the project.
San Diego’s construction costs already run 25 to 30 percent higher than the national average. Coastal communities like Pacific Beach, La Jolla, and Encinitas can run even higher due to marine-grade material requirements and the specific demands of building near salt air and UV exposure. In that environment, a contractor who specs materials without accounting for San Diego’s coastal climate conditions is setting you up for premature failure — peeling paint, failing caulk lines, rust, and water intrusion — within a few years of completion. It’s worth asking directly: what materials are you specifying, and why are they right for this location?
The red flags covered here aren’t rare edge cases. They show up regularly in San Diego County — in sting operations, in DA complaints, in the stories homeowners tell after the fact. The good news is that most of them are visible before you sign anything, if you know what to look for.
Verify the license at CSLB.ca.gov. Ask who specifically will be doing the work. Read the deposit terms before you hand over anything. Make sure permits are included in the estimate — not as an afterthought, but as a line item. And pay attention to how a contractor communicates in the estimate phase, because that’s exactly how they’ll communicate once your walls are open.
If you’re planning a home addition in San Diego County and want to talk through your project with a contractor who handles permits, uses a direct crew, and will give you a detailed estimate with no hidden costs, reach out to us at MRH Pro Construction & Painting. We’ve been doing exterior remodeling work in this county for 16 years, and we’re straightforward about what we do and how we do it.
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