Construction Warning Signs: A San Francisco Homeowner's Reference Guide

Construction Warning Signs: A San Francisco Homeowner’s Reference Guide

Here’s a number that should get your attention: the Contractors State License Board receives more complaints about home improvement contractors than any other category of licensed trade in California, and San Francisco consistently ranks among the top five counties for volume. The pattern is predictable. A contractor shows up on time for the estimate, promises a start date within three weeks, collects a deposit, and then goes quiet. You’re not reading how to hire a construction contractor in San Francisco or a guide about spotting shady characters in stained t-shirts. The real warning signs in San Francisco’s remodeling market are buried in the paperwork: the bid that’s missing line items, the contract that skips lien waivers, the permit placard that never appears in the window. This guide walks you through what those red flags look like, where they hide, and what to do when you spot one before you’ve lost a deposit.

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Quick Answer

The clearest construction warning signs in San Francisco are documentary, not personal: a bid without line-item scope, a contract that skips lien waivers and payment-on-milestone terms, no posted permit placard, verbal change orders, and a refusal to put warranty callbacks in writing. Any one of these should pause the job. Two or more should end the conversation.

Table of Contents

• Bid Red Flags: What’s Missing That Should Disqualify a Contractor
• Contract Red Flags: Lien Waivers, Draw Schedules, and Not-to-Exceed Caps
• Job-Site Red Flags: Permits, Placards, and Worker’s Comp Certificates
• Communication Red Flags: Verbal Change Orders and Mismatched Invoices
• Post-Problem Red Flags: Warranty Callbacks and ‘Normal Settling’
• San Francisco-Specific Permit and Code Concerns
• Materials Red Flags: Allowances, Substitutions, and Unspecified Brands
• Common Mistakes to Avoid
• When to Call a Professional
• Frequently Asked Questions
• The Bottom Line

Bid Red Flags: What’s Missing That Should Disqualify a Contractor

Most homeowners evaluate a bid by looking at the bottom number. That’s backwards. The bottom number on a San Francisco remodeling bid is almost meaningless if it isn’t supported by a scope breakdown that tells you exactly what you’re buying. The bid is the first written artifact of the relationship, and it’s where the disciplined contractor separates from the one who’s going to surprise you later.

Here’s what we look for when we review a competing bid for a client, and what should make you put the pen down:

• No line-item scope. A bid that says “kitchen remodel: $68,000” without breaking out cabinetry, countertops, plumbing rough-in, electrical, tile, and finishes tells you nothing about what that number actually covers. When the scope is undocumented, the price can slide at the first change order. Every line item should have a dollar figure attached.
• Lump-sum labor. Labor is often the largest single cost in a San Francisco remodel, and it should be broken out by phase: demo, framing, rough-in, finish. A single labor number means you can’t verify whether the contractor is paying skilled trades or cutting corners with unlicensed day labor.
• No listed subcontractors. If the job requires plumbing, electrical, or structural work, the bid should name the subcontractors or state that the contractor is self-performing those trades. A blank space here is a common precursor to whoever-is-available hiring, which is how unlicensed workers end up on your property.
• Vague allowances. An “allowance” for cabinetry of $8,000 without a brand, a door style, or a finish attached is not an allowance. It’s a placeholder with an optimistic number. The moment you sit down at a design desk and pick something real, that placeholder gets replaced with a change order.
• No timeline in writing. A bid without a schedule is a suggestion, not a commitment. The schedule should include start date, milestone dates, and a substantial completion date. In San Francisco, where permitting alone can run 3 to 5 months on a full remodel, that timeline needs to account for the Department of Building Inspection’s review queue.
• No permit line item. A bid that doesn’t include a permit allowance or state that permits are the homeowner’s responsibility is a red flag the size of a stop sign. We’ll get to permits in a moment, but the bid is where the permit strategy should first appear in writing.

One bid we reviewed for a Noe Valley kitchen remodel listed “demo and haul: $14,000” with no breakdown of what was being demolished, how debris would be handled, or whether asbestos testing was included. That’s a three-line item, and it turned into a $9,000 change order when the wall turned out to be shear. A disciplined bid would have flagged the structural question before the contract was signed.

If you’re working with a General Contractor in San Francisco, the bid is where you’ll first see The Garrison Standard in action: every price in writing, every line item documented, no numbers that move at the door. That’s not a marketing phrase. It’s a test you can run on the paperwork in front of you.

Contract Red Flags: Lien Waivers, Draw Schedules, and Not-to-Exceed Caps

By the time you’re signing a contract on a San Francisco remodel, you’ve already committed emotionally to the project. That’s exactly why the contract stage is where the most expensive mistakes get made. The contract is not a formality. It’s the document that determines whether you have any leverage when something goes wrong, which is why our general contractor maintenance checklist for San Francisco homeowners starts with contract provisions.

Here are the five contract provisions that should stop you from signing:

1. No lien waivers, or lien waivers that are not addressed at all. In California, subcontractors and suppliers can file a mechanic’s lien against your property if the general contractor doesn’t pay them, even if you’ve paid the general contractor in full. A proper contract addresses lien waivers from day one: every payment to the contractor is conditioned on the contractor providing signed lien waivers from everyone who has touched the job up to that point. If the contract doesn’t mention lien waivers, the contractor is either inexperienced or hoping you won’t ask.
2. Payment-on-start rather than payment-on-milestone. A contract that says “50% due at contract signing” without tying that payment to a specific deliverable is a gift, not a contract. A disciplined draw schedule ties every payment to a verifiable milestone: 10% on permit issuance, 20% on rough-in inspection passed, 25% on drywall and finish start, and hold a minimum of 5-10% as retainage until final inspection is signed and the punch list is complete. If the contractor asks for a big chunk before any work has been performed, the risk shifts entirely to you.
3. “Time and materials” language without a not-to-exceed cap. Some projects legitimately run on time and materials, especially older San Francisco homes where you don’t know what’s behind the lath and plaster until you open the wall. But a T&M contract without a written not-to-exceed cap is a blank check. The cap should be in the contract, in writing, with a change order mechanism for anything that exceeds it.
4. No dispute resolution clause. When a job goes sideways, you want the path to resolution established before the conflict starts. A contract that doesn’t address what happens in a dispute leaves you in court, and court in San Francisco is slow and expensive. Mediation and arbitration clauses are standard in disciplined contracts.
5. No written warranty terms. If the contract doesn’t state what’s covered, for how long, and what happens when something fails, you don’t have a warranty. A one-line “all work guaranteed” without terms is not a guarantee. It’s a sentence.

Bradford Remodeling puts every price and every guarantee in writing before a single tool comes out, and the contract is where that commitment lives. The 365-Day Done Right Promise is written into the contract: if the work fails inside the guarantee period, we return and correct it at no charge. That’s a specific, enforceable term, not a handshake.

Job-Site Red Flags: Permits, Placards, and Worker’s Comp Certificates

The job site tells you what the paperwork won’t. When you walk up to a San Francisco remodel, the first thing you should see is a posted permit placard. If you don’t see one, ask why. If the answer is vague, that’s your answer.

Here’s what a squared-away job site looks like in San Francisco, and the specific red flags that signal the opposite:

• No posted permit placard. In San Francisco, the Department of Building Inspection requires the permit placard to be posted on the job site and visible from the street. If work is underway and there’s no placard, one of two things is true: the contractor pulled the permit and hasn’t posted it, which is a violation, or the contractor never pulled the permit at all. Either one should stop the job. Unpermitted work on a San Francisco remodel becomes a disclosure problem when you sell, a red tag risk if an inspector drives by, and a coverage problem if your insurer finds out.
• Work starting before a permit is issued. This one’s shockingly common. A contractor says “we’ll start demo on Monday, the permit is in the queue.” Demo without a permit is the single most common cause of stop-work orders in San Francisco. The Department of Building Inspection has the authority to red-tag a site and require that all work stop until the permit is issued, which can add weeks to a timeline and thousands to the cost.
• Unlicensed day laborers without worker’s comp certificates. You can’t always tell by looking, but there’s one document that rules out the question entirely: a Certificate of Insurance naming the subcontractor and showing coverage for workers’ compensation. Every trade on your job site should be able to produce one. If they can’t, and someone gets hurt on your property, your homeowner’s insurance is the backup plan. That’s not a risk worth taking.
• No safety plan for trenching, scaffolding, or height work. San Francisco’s hills mean retaining walls, foundations, and sloped sites are part of life here. Any excavation, scaffolding, or roof-adjacent work should have a written safety plan and the crew should be following it. If you see a trench without shoring or a scaffold without guardrails, that’s a job-site red flag and an OSHA violation in progress.
• Site not secured at end of day. A disciplined crew covers materials, secures tools, and locks the site every evening. If the job site looks abandoned mid-week, with materials open to the weather and the door unlocked, it’s a signal about how the rest of the job will be run.

Here’s the part most guides skip: permit placards in San Francisco list the permit number, the work description, and the contractor’s name. You can look up that permit number on the Department of Building Inspection’s online portal and verify that the scope matches what’s actually happening. If the placard says “kitchen remodel” and the crew is dismantling a load-bearing wall, the scope has wandered off-permit. Curtis Lane, owner of Bradford Remodeling Co San Francisco home, has seen this play out too many times to count: a homeowner notices the placard mismatch, calls the inspector, and the job shuts down for six weeks while the variance gets filed.

Communication Red Flags: Verbal Change Orders and Mismatched Invoices

Change orders are where the money moves. A verbal change order is not a change order. It’s a conversation. And a conversation doesn’t hold up when the invoice arrives and the number is twice what you remember.

In a San Francisco remodel, change orders are inevitable. Older homes hide surprises: knob-and-tube wiring, galvanized supply lines, insufficient joist spans, dry rot in the sill plate. A disciplined contractor documents every one of those discoveries in writing, prices it, gets your signature, and moves on. An undisciplined contractor says “we’ll sort it out later” and hands you the bill at the draw meeting.

Here are the communication red flags to watch for, in order of how often we see them in San Francisco:

1. Verbal change orders. If the contractor doesn’t write it down, it didn’t happen. A proper change order includes: a description of the changed scope, the cost impact, the schedule impact, and a signature line. If the contractor won’t put a change in writing, the contractor is not planning to be held to it.
2. Invoices that don’t match the draw schedule. Your contract should have a draw schedule, and every invoice should reference the milestone it’s tied to. An invoice for “progress payment” without a milestone reference is a request for money on trust. In a six-figure San Francisco remodel, no one should be asked to fund the job on trust.
3. Reluctance to provide a written punch list. At the end of the job, the punch list is the final scope document. It’s where every outstanding item gets written down: the trim that’s not installed, the grout that’s cracking, the cabinet door that doesn’t close square. A contractor who won’t put the punch list in writing is a contractor who plans to not finish those items.
4. Not answering the phone. This one sounds simple, but it’s diagnostic. If the contractor doesn’t answer during the estimate phase, that’s a preview. Bradford maintains live-person phone coverage 24/7 because a homeowner who can’t reach their contractor mid-project is a homeowner in a holding pattern with a torn-up kitchen.

We’ve seen San Francisco homeowners show us text messages from contractors promising “we’ll make it right” with no paper trail behind the promise. That’s not communication. That’s a stall tactic. When the invoice doesn’t match the draw schedule, the disciplined response is a single sentence: “Show me the signed change order, and we’ll pay it.”

Post-Problem Red Flags: Warranty Callbacks and ‘Normal Settling’

The most revealing moment in any contractor relationship is what happens after the final check clears. That’s when you find out whether the warranty was a document or a decoration.

Here are the three post-problem red flags that should concern any San Francisco homeowner:

• Warranty callbacks that aren’t in writing. If you call about a crack in the new drywall and the contractor says “we’ll take care of it” without putting it in writing, you’re relying on a memory. A written warranty commitment includes: the date you reported the issue, the date the contractor acknowledged it, and the date the repair was scheduled. The 365-Day Done Right Promise at Bradford works this way: every callback is documented, scheduled, and corrected at no charge within the guarantee period.
• “That’s normal settling.” Some settling is normal. Most is not. Hairline cracks in new drywall within the first 60 days are common and generally benign. Cracks that appear six months after completion, that follow a consistent pattern, or that coincide with a door that suddenly doesn’t latch should not be dismissed as “settling.” In San Francisco’s seismic zones, foundation movement is a real thing, and it’s rarely something to wave off. A disciplined contractor investigates. An undisciplined one dismisses.
• Delaying final inspection sign-off. After substantial completion, the job isn’t done until the Department of Building Inspection signs off on the final inspection and your certificate of occupancy (where applicable) is in hand. A contractor who keeps finding reasons to delay final inspection is a contractor who knows something won’t pass. The fix is simple: the final payment is held in retainage until final inspection is signed. No signed final, no final check.

We’ve walked into enough San Francisco remodel follow-ups to know the difference between a warranty call and a punch-out failure. A warranty call is “the cabinet hinge failed, please replace it.” A punch-out failure is “the cabinet was never aligned, you’ve been promising to fix it for six weeks.” One is normal. One is a red flag about how the job was run.

San Francisco-Specific Permit and Code Concerns

San Francisco’s building code is not the same as any other city’s, and the permitting process is not the same as any other county’s. If your contractor talks about San Francisco permits the way they’d talk about permits in Sacramento, that’s a red flag about local experience.

Here’s what a San Francisco remodel actually requires, and the specific warning signs that a contractor doesn’t know the territory:

The San Francisco Permit Landscape

San Francisco operates its own building department, the Department of Building Inspection (DBI), and it has its own building code based on the California Building Standards Code with local amendments. The city is notoriously strict on: seismic retrofit requirements for remodels that touch structural elements, energy code compliance for any project over a specific scope threshold, and planning review for any work that changes the exterior, the roofline, or the footprint. A full-home remodel in San Francisco can require three separate reviews: planning, building, and sometimes historic preservation if the property is in a designated district.

Warning Sign: Contractor Claims Permits “Aren’t Needed”

Any contractor who tells you a kitchen or bath remodel “doesn’t need a permit” in San Francisco is either lying or testing you. Kitchen remodels that move plumbing, electrical, or gas lines require permits. Bath remodels over a certain dollar threshold require permits. Adding a window, removing a wall, or changing any structural element requires permits. A contractor who claims otherwise is planning to keep the work off the books, which means it won’t be inspected, which means it becomes a disclosure problem the day you sell.

Warning Sign: Contractor Doesn’t Know the Soft-Story Ordinance

If your San Francisco home has a garage at ground level with living space above, it’s a soft-story building under the city’s mandatory seismic retrofit ordinance. The ordinance applies to buildings with permits applied for before a specific date and with specific structural characteristics. A contractor doing a full-home remodel on a soft-story property who doesn’t bring up the retrofit requirement is not a local contractor. The question should come up in the first site visit.

Warning Sign: Contractor Quotes Permitting Costs Without Knowing the Review Queue

DBI’s plan review timeline changes with the construction cycle. A contractor who confidently quotes “two weeks for permits” in San Francisco hasn’t pulled a permit here recently. The realistic timeline for a full kitchen or bath remodel is measured in months for plan review, and a home addition can run longer. A disciplined local contractor sets your schedule expectations with the actual DBI timeline in mind.

If you’re planning a Kitchen Remodeling in San Francisco project, the permit conversation should happen in the first meeting. Not “we’ll figure out permits later.”

Materials Red Flags: Allowances, Substitutions, and Unspecified Brands

Materials are where the money goes, and materials are where undisciplined contractors create their margin after the contract is signed. The materials section of your bid and contract tells you whether the contractor is specifying actual products or keeping the door open for whatever shows up at the supply house.

Here’s what to look for:

• “Or equal” substitutions. The phrase “KraftMaid cabinetry or equal” is a license to substitute. It means the contractor can show up with a no-name cabinet line and a price that was based on KraftMaid, and the difference lands in the contractor’s pocket. A disciplined bid names the brand and the product line, and substitutions require your written approval at the same or better specification.
• Allowances with no brand attached. An “allowance” is a place holder. It exists in the bid because you haven’t made a selection yet. That’s fine. But the allowance should be paired with a brand ceiling: “cabinetry allowance: $12,000, based on KraftMaid or Wellborn line, full-overlay doors.” That tells you what the number buys. A bare allowance with no brand attached gives the contractor room to price at a custom level and deliver at a stock level.
• Unspecified exterior products. San Francisco’s marine layer and wind-driven rain are unforgiving on exterior materials. A contractor who specifies “new siding” without saying James Hardie fiber cement, or “roofing” without naming GAF or CertainTeed, hasn’t done the material selection work. The climate in the Outer Sunset is not the climate in Noe Valley, and the manufacturer’s spec for wind-driven rain exposure matters. If the contractor can’t tell you which James Hardie product line is specified and why, that’s a materials red flag.
• No manufacturer warranty documentation. Name-brand materials come with manufacturer warranties, and those warranties should be in your hand at close-out. At Bradford, we work with a documented roster of brands: KraftMaid and Wellborn cabinetry, Cambria and Caesarstone surfaces, Kohler and Moen fixtures, GAF and James Hardie exterior products, Therma-Tru doors, and Belgard hardscaping, among others. Every one of those products comes with manufacturer specs and warranties that back our own guarantee. If your contractor can’t produce the manufacturer warranty documents at the end of the job, the brand was probably not installed.

San Francisco homeowners should also be aware of the modular and prefab conversation that’s increasingly common here. Plant Prefab and Boxabl are both in the conversation for accessory dwelling units and panelized additions, and Tuff Shed is a common choice for permitted backyard structures. If a contractor dismisses those options without explaining why, that’s not a red flag exactly, but it does suggest a contractor who isn’t current with what’s being built in the city. For context on when professional expertise matters more than cutting-edge methods, see our DIY vs Professional Construction: The San Francisco Homeowner’s Decision Guide.

Common Mistakes to Avoid

• Hiring on price alone. The lowest bid in San Francisco is usually low for a specific reason: the scope is thinner, the materials are unspecified, or the contractor is planning to find profit in change orders. Compare bids line-by-line, not by the bottom number.
• Signing a contract without reading the payment schedule. Your leverage in any remodel is the money you haven’t paid yet. A front-loaded payment schedule hands that leverage to the contractor on day one.
• Accepting verbal change orders. Write it down or it didn’t happen. This single habit prevents more disputes than any other.
• Letting the contractor pull permits in the wrong name. The permit should list the contractor’s license as the responsible party, not you as the owner-builder. If a contractor asks you to pull the permit as owner-builder while they do the work, they’re asking you to take on their liability.
• Not holding retainage. A final 5-10% held until final inspection passes and the punch list is complete is standard practice. If your contractor objects to retainage, that’s a red flag.
• Skipping the lien waiver at final payment. Your final check should be exchanged for signed lien waivers from every subcontractor and supplier who worked on the project. Without them, you can be forced to pay twice.

When to Call a Professional

Some warning signs are informational: you should know what they mean. Others are actionable: you should stop the job and get a second opinion. If you’re holding a bid with no line-item scope, a contract with no lien waiver language, or a job site with no permit placard, you’re past the point of self-education and into the territory where a professional review is worth the price. A Home Remodeling in San Francisco project is too expensive to run on trust. Bradford Remodeling Co San Francisco offers free estimates in San Francisco. Call (831) 610-5598 and Curtis Lane or a member of the team will walk through your existing bid or contract and tell you what’s missing.

Frequently Asked Questions


What’s the biggest red flag when hiring a contractor in San Francisco?
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Do I need a permit for a kitchen remodel in San Francisco?
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What is a reasonable down payment for a remodeling contractor?
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What does a lien waiver do in a San Francisco remodel?
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How do I verify a contractor’s license in California?
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Why does the permit placard matter on a San Francisco job site?
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The Bottom Line

Construction warning signs in San Francisco hide in the paperwork: the bid without line items, the contract without lien waivers, the job site without a permit placard, the change order delivered verbally. None of these are about personality or gut feeling. They’re all checkable, documentable, and enforceable. The disciplined contractor welcomes the checks. The undisciplined one dodges them. When you’re evaluating a remodel in San Francisco, run the paperwork test before you run the personality test. For more guides & resources on navigating the remodeling process, explore our blog. Ask for the line items, the lien waivers, the permit plan, and the written warranty. The answers will tell you everything you need to know.

Written by Curtis Lane, Owner at Bradford Remodeling Co San Francisco, serving San Francisco since 2004.