Owner-Builder Tools
Compare contractor bids apples to apples: normalize scope, labor, materials, warranty, and payment terms in one view
Last reviewed May 2026
Updated May 2026
| Bid A | Bid B | Bid C | |
|---|---|---|---|
| Identification | |||
| Contractor Label | |||
| Pricing and Scope | |||
| Total Bid Price ($) | |||
| Materials Included? |
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| Est. Materials Value ($) | |||
| Duration (weeks) | |||
| Insurance, License and Warranty | |||
| GL Insurance? |
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| Workers Comp? |
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| License Verified? |
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| Warranty (months) | |||
| Payment and Contract Terms | |||
| Payment Terms | |||
| References Available? |
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| Lien Waiver Included? |
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| Bid A | Bid B | Bid C | |
|---|---|---|---|
| Total Bid Price | -- | -- | -- |
| Materials Included | -- | -- | -- |
| Labor-Only Value | -- | -- | -- |
| Duration | -- | -- | -- |
| Effective Labor Rate | -- | -- | -- |
| Warranty | -- | -- | -- |
| GL Insurance | -- | -- | -- |
| Workers Comp | -- | -- | -- |
| License Verified | -- | -- | -- |
| Payment Risk | -- | -- | -- |
| Lien Waiver | -- | -- | -- |
Continue your owner-builder planning:
When you get three bids for the same framing job, you are almost never comparing the same thing. One contractor includes all materials and sheathing. Another prices labor only and expects you to supply materials. One has a two-year warranty. One has none. One wants 50% upfront. One wants 10% down.
The number on the bid sheet is not the price you are comparing. This tool separates each variable so you can see what you are actually looking at.
The most important normalization this tool performs is the effective labor rate: (Total Bid minus Estimated Materials Value) divided by Duration in Weeks. If Bid A is $38,000 with $14,000 in included materials over 6 weeks, the labor-only value is $24,000 and the effective labor rate is $4,000 per week. If Bid B is $31,500 labor-only over 5 weeks, the effective labor rate is $6,300 per week.
Bid B looks $6,500 cheaper. It is actually 57% more expensive on a per-week labor basis once you account for the fact that you still need to separately procure and deliver materials to the job site.
Workers compensation insurance is the single most financially dangerous gap in contractor vetting. In many states, if a contractor or their laborers are injured on your job site and the contractor does not carry workers comp coverage, you as the property owner may be liable for their medical costs and lost wages.
This is not a theoretical risk. Owner-builders who hire the cheapest bid without verifying insurance and then have a worker injured on site have faced significant liability exposure in states that hold property owners responsible for uninsured subcontractor injuries. The specific rules vary by state. Always request a current certificate of insurance (not a verbal confirmation) before work begins.
Mechanic's lien law exists in all 50 states. It allows contractors, subcontractors, and material suppliers to file a legal claim against your property if they are not paid. The dangerous scenario for an owner-builder: you pay your framing contractor in full. Your framing contractor does not pay the lumber yard. The lumber yard files a mechanic's lien against your property for the unpaid lumber bill.
A lien waiver on completion is a document the contractor signs certifying that they and their suppliers have been paid and waiving their right to file a lien. Requesting it at project close is standard practice in residential construction. A contractor who refuses to provide one is a yellow flag on its own.
For residential subcontract work above $20,000, a mobilization payment of 10% with the balance tied to completion or progress milestones is standard. A 50% upfront requirement from a contractor you have not worked with before is a yellow flag worth examining. If you accept those terms, tie them to a written milestone schedule and require progress documentation before each payment after the initial mobilization.
Compare bids on a normalized basis, not just the total price. Key variables to equalize: whether materials are included in the bid price, the project duration, insurance status (workers comp and general liability), payment terms, and warranty terms. Remove estimated materials cost from each bid to compute a labor-only figure. That effective labor rate is the most honest apples-to-apples number.
In many states, if you hire a contractor who does not carry workers compensation insurance and their worker is injured on your job site, you as the property owner may be held liable for the worker's medical costs and lost wages. Always verify that any subcontractor carries their own workers comp policy before signing a contract. Request a certificate of insurance, not just a verbal confirmation.
Mechanic's lien law exists in all 50 states. It allows contractors and material suppliers to file a legal claim against your property if they are not paid. Even if you pay your contractor in full, if that contractor does not pay their material suppliers, those suppliers can file a lien against your property. A lien waiver on completion is a document the contractor signs certifying that they and their suppliers have been paid and waiving their right to file a lien.
For residential subcontract work above $20,000, a 10% mobilization payment with the balance tied to completion or progress milestones is standard. A 50% upfront requirement from a contractor you have not worked with before is a yellow flag. Negotiate for milestone-based payments tied to inspection passes when possible.
Effective labor rate is the labor-only cost per week of project duration: (Total Bid minus Estimated Materials Value) divided by Duration in Weeks. It normalizes bids where one contractor includes materials and another does not. A bid that looks cheaper may actually have a higher effective labor rate when materials are accounted for.
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