How to Compare Contractor Bids Without Getting Burned
So why is there a quarter-million-dollar spread?
Tabel Construction
So why is there a quarter-million-dollar spread?
You asked three contractors to bid your kitchen remodel. One came back at $480,000. Another at $620,000. The third at $735,000. They all walked the same house, heard the same wish list, and shook your hand on the way out.
So why is there a quarter-million-dollar spread?
Here is the short answer: they are not bidding the same project. They might think they are. You might think they are. But somewhere in those numbers — in what is included, what is excluded, and what has been left intentionally vague — three very different promises are hiding behind three very different totals. Understanding which bid is actually complete is the decision that determines whether your remodel finishes on budget or costs you an extra $150,000 in change orders.
The standard advice is simple: get three bids and pick the middle one. That advice works fine when you are comparing quotes for a fence. It falls apart when you are staring at a $750,000 whole-house remodel on the Peninsula, and the three bids in front of you differ by $200,000 — because each contractor scoped the project differently, included different things, and made different assumptions about what you actually want.
One Hillsborough homeowner described it plainly: "I asked three contractors for an itemized bid. One refused, one gave me a one-page estimate, and one said that is not how we do it. How is this an industry?"
It is a fair question. And it points to the core problem: you cannot compare apples to apples when you do not know what somebody is bidding. A $500,000 bid that includes engineering, permits, and contingency is a fundamentally different number than a $420,000 bid that does not. But on paper, the second one looks like a better deal.
At the project scales common on the Peninsula — $500,000 to $2 million for a major remodel — a 15 to 20 percent budget overrun means $75,000 to $300,000 in unplanned costs. In Hillsborough, Atherton, Burlingame, and Los Altos Hills, those overruns do not come from bad luck. They come from bids that were never complete in the first place.
Before you can spot what is missing from a bid, you need to know what a thorough one looks like. A real, line-item bid for a major remodel should include:
A quick but important distinction. An estimate is an educated guess — a rough range based on limited information. A proposal is a detailed scope of work with pricing, typically presented before a contract is signed. A contract is a binding agreement with a fixed scope and price.
When a contractor hands you a one-page document with a round number at the bottom and calls it a bid, what you are actually holding is an estimate. And an estimate for a $600,000 remodel is not something you sign. It is something you question.
You will see the word "allowance" in many bids. An allowance is a placeholder — a budgeted amount for an item that has not been finalized yet. For example: "Tile allowance: $15,000" means the bid assumes you will spend $15,000 on tile, but the actual tile has not been selected.
Allowances are useful when they are transparent. They become a problem when a contractor sets artificially low allowances to make the total look smaller, knowing you will exceed them. If a bid shows a $5,000 allowance for all plumbing fixtures in a four-bathroom remodel, that is not an allowance — it is a trap.
A bid that names the tile supplier, the plumbing fixture model, and the lumber grade is a bid from someone who has actually priced the work. Specificity is the signal.
If you are already holding bids and want a second set of eyes, we are happy to walk through them with you — even if you are not planning to work with us. Reach out to Matt at (408) 448-1342 or info@tabelconstruction.com.
When one bid comes in significantly lower than the others, it rarely means that contractor found a way to do the same work for less money. It means they are bidding less work — and hoping you will not notice until after the contract is signed.
On a major Peninsula remodel, permits and engineering can run $15,000 to $50,000 or more — depending on the scope, the jurisdiction, and whether structural engineering or soils reports are required. In cities like Palo Alto, Menlo Park, and Hillsborough, permit timelines and fees are among the highest in the region. Low bids often exclude these entirely. The contractor may tell you "permits are the homeowner's responsibility" or simply not mention them at all. Either way, that cost does not disappear. It shows up later.
Demolition debris removal. Temporary fencing. Street use permits for dumpsters. Neighbor property protection. SWPPP compliance for erosion control. Tree protection during construction. None of this is glamorous, and none of it is optional on a properly run project. When it is missing from a bid, it is either going to be skipped (which creates problems) or added as a change order (which costs more than if it had been included from the start).
An honest bid for a remodel includes a contingency line — typically 10 to 15 percent of the project cost — to cover the things you cannot predict. What is behind the walls. What the original builder did that does not meet current code. What the soil does when you start excavating. On a $1 million remodel, that contingency is $100,000 to $150,000. A bid without it is not optimistic. It is incomplete.
The contractor who leaves out contingency is betting that when the surprises hit, they will recover the cost through change orders — which you will approve because you are mid-project and have no other option.
Running a major remodel takes daily on-site leadership. Someone needs to coordinate trades, manage the schedule, handle inspections, make real-time decisions, and communicate with you. That is a real cost. When it is not in the bid, one of two things is happening: either nobody is actually managing your project, or that cost will appear later as an unmarked line item.
Final grading. Landscape repair. Punch list completion. Final cleaning. Touch-up painting. Hardware installation. The last 10 percent of a project is the part the homeowner touches and sees every single day — and it is the part low-bid contractors treat as optional. They will get the big stuff done, collect the last payment, and disappear before the details are finished.
Every contractor horror story you have heard started the exact same way: "He seemed great at first."
Every one of these omissions is a change order waiting to happen. As Margie Tabel puts it: "Our goal is not to be the cheapest or the highest — it is to be the most accurate." The low bid is never actually low. It is the opening number before the change orders start.
You do not need a construction background to evaluate a bid. You need a method.
Line up the bids by category, not just by total. Create a simple spreadsheet. List every category — demo, framing, electrical, plumbing, HVAC, finishes, permits, contingency, project management — down the left side. Fill in each contractor's number for each category. Where one bid is blank and the others are not, you have found what was left out.
Look for the widest variance. If all three bids are within 10 percent on framing but one bid's electrical number is half the others, that is where the conversation needs to happen. The widest variance between bids almost always reveals what one contractor included and another did not.
Use the cost-per-square-foot shortcut carefully. Dividing the total bid by the project square footage gives you a rough benchmark. On the Peninsula in 2026, a major remodel typically runs $350 to $700+ per square foot depending on scope and finishes. Whole-home gut remodels in Atherton or Hillsborough often exceed $700 per square foot when you factor in premium finishes, structural work, and permit complexity. A bid at $400 per square foot with everything included is a better number than a bid at $350 per square foot that is missing permits, contingency, and project management.
When a bid is significantly lower, ask the right question. The question is not "how did they save money?" It is "what did they leave out?" A contractor who bids $150,000 less than two competitors either found a dramatically more efficient way to build your project — which is rare — or they are not bidding the same project.
Ask each contractor to explain the differences. Bring all three bids to each contractor and ask them to explain why their number differs from the others. The one who can do this confidently, line by line, understands the work at a granular level. The one who gets defensive or dismissive probably does not.
Tabel Construction's license number is B-831477 (General Building Contractor). When vetting any contractor, verify their license is active and in good standing at the California CSLB website. This step takes 90 seconds and is non-negotiable at this price point.
Once you have narrowed the field, these questions separate the contractors who priced the work from the ones who priced the pitch.
"Is this a fixed-price bid or an estimate subject to change?" This sounds basic. Ask it anyway. You would be surprised how many homeowners sign what they think is a fixed-price contract only to discover the fine print says "prices subject to adjustment based on site conditions."
"What is NOT included in this number?" The most revealing question you can ask. A good contractor answers this immediately and specifically. A contractor who hesitates or says "everything is included" — which is never true — is telling you something important.
"How do you handle change orders — what triggers one, and what is the approval process?" Change orders are a normal part of remodeling. What matters is the process. Is there a written change order with scope, cost, and timeline impact before work proceeds? Or does the contractor do the work and hand you a bill?
"What happens if we open a wall and find something unexpected?" Every experienced builder has encountered rotted framing, asbestos, outdated wiring, or plumbing that does not meet code. The question is not whether it will happen. It is how the contractor handles it — and whether the contingency in the bid covers it.
"Can you walk me through the bid line by line right now?" This is the ultimate test. A contractor who built the bid themselves can explain every number, every allowance, every assumption. A contractor who had a salesperson generate the bid, or who pulled numbers from a software template without actually pricing the work, cannot.
A builder with genuine trade mastery — someone who can tell you why framing costs differ between a flat-lot Burlingame home and a hillside lot in Portola Valley — is a builder whose bid you can trust.
Here is what the bid process looks like when it is done right — not as a sales pitch, but as a benchmark for what you should expect.
It starts with a thorough site visit. Not a 20-minute walkthrough with a tape measure, but a detailed conversation about what you want, what the house needs, and what is realistic given the structure, the lot, and the jurisdiction. The builder asks questions you had not thought of — about how you use the space, what bothers you about the current layout, what you are not willing to compromise on.
Then comes a detailed scope of work, followed by a line-item proposal that breaks the project into every trade, every material category, every fee. Allowances are clearly labeled with realistic numbers. Contingency is included and explained. The timeline is phased and tied to specific milestones.
The proposal is presented in person — not emailed as a PDF with a "let me know if you have questions" note. The builder sits with you and walks through every line. If you have competing bids, the builder can explain the differences — not by bad-mouthing the competition, but by pointing to specific inclusions.
Peninsula homeowners who go through this process consistently say the same thing: it is the first time they actually understood what they were paying for. And that understanding — that clarity — is worth more than any discount.
The most expensive bid is sometimes the most accurate one. The cheapest bid almost never is.
Fourth-generation builders who have spent 20+ years on Peninsula projects, earning recognition like BuildZoom's Top 3% of California contractors and a 5.0/5.0 rating on Houzz, build bids to be read — because they have nothing to hide and everything to explain.
If you are planning a major remodel on the Peninsula — in Hillsborough, Atherton, Burlingame, Menlo Park, Los Altos, Woodside, Portola Valley, or a neighboring community — we are happy to walk through what you are looking at, even if you do not hire us. Bring your bids to a conversation and we will help you read them side by side.
Call or text Matt at (408) 448-1342, or reach Margie at info@tabelconstruction.com.
Already have a contractor shortlist? Read our companion post: What to Look For When Hiring a General Contractor for a Major Remodel — it covers the vetting questions that go beyond license checks and Google reviews.
Bids vary because contractors scope projects differently. One may include permits, engineering, contingency, and project management while another leaves those out entirely to make their number look more competitive. On a $750,000 remodel, a 20 percent difference in bids often reflects $150,000 in items that are simply missing — not a more efficient way of building. The only way to know is to compare bids line by line, not total to total.
A thorough bid for a major remodel should include: labor broken out by trade (framing, electrical, plumbing, HVAC, finish carpentry, painting, tile), materials by category with specific product selections or clearly labeled allowances, permits and plan check fees, engineering if required, subcontractor costs as visible line items, project management and supervision, a contingency of 10 to 15 percent, and a phased timeline with milestones. If any of these are missing, ask why.
In cities like Palo Alto, Menlo Park, Hillsborough, and Burlingame, permits and engineering for a major remodel typically run $15,000 to $50,000 or more depending on project scope, structural requirements, and jurisdiction. Hillside lots and projects requiring soils reports or structural engineering will sit at the higher end of that range. This cost is required by law — any bid that excludes it is understating the true project cost.
A change order is a written amendment to the original contract that documents a change in scope, cost, and timeline. Legitimate change orders cover genuine surprises — unexpected conditions behind walls, homeowner-initiated additions, or code compliance issues discovered during construction. Protect yourself by requiring written change orders with cost and timeline impact before any additional work begins, by ensuring your bid includes a realistic contingency line, and by hiring a builder whose initial bid was thorough enough to anticipate most foreseeable conditions.
Ask them to walk you through the bid line by line in person. A contractor who built the bid themselves can explain every number, every allowance, and every assumption without hesitation. Ask specifically: "What is not included in this number?" and "How did you arrive at the electrical cost?" A contractor who cannot answer in specifics did not price the work themselves. Also ask them to explain why their number differs from competing bids — a confident, knowledgeable builder can do this without being defensive.
Yes, directly. The pre-drywall walkthrough is the last checkpoint before everything behind your walls becomes invisible for decades. A builder who pauses construction to walk you through outlet placement, blocking locations, plumbing routing, and HVAC ductwork before closing the walls is giving you the opportunity to catch decisions that would cost thousands to change later. Blocking for a TV mount costs $15 in lumber before drywall. After drywall, it costs $500 to $2,000 per location. The walkthrough is a cost-control tool as much as a transparency tool.
Every project starts with an honest conversation. Tell us what you are building and we will give you a straight answer about scope, timeline, and budget.
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