Prefab Contract Terms
What to Confirm Before You Sign
A prefab contract should answer a very practical question:
What, exactly, is each company promising to provide in exchange for your money?
That sounds obvious. But prefab projects often involve more than one agreement: a factory purchase agreement, a dealer agreement, a local construction contract, an installation agreement, transportation, engineering, and sometimes separate site-work contracts.
The danger is not simply that you fail to read the contract.
The danger is that you read it, recognize all the words, and still do not realize that the project you think you are buying is different from the project the contract actually describes.
This article is not about reading every page more carefully.
It is about knowing what you need to confirm in what you are reading before you sign.
First: Confirm Who You Are Actually Contracting With
The company name on the website may not be the company named in the agreement.
Confirm:
The full legal name of the contracting entity.
The business address.
Who receives your money.
Whether the seller is the manufacturer, dealer, contractor, or another entity.
Which company owns the factory.
Which company is responsible for delivery.
Which company is responsible for installation.
Which company provides the warranty.
If site construction is being performed under a California contractor's license, confirm that the licensed entity is the entity actually contracting to perform that work.
Multiple companies can be perfectly legitimate.
What you do not want is to discover after a problem that the company whose salesperson made the promise is not the company that legally promised you anything.
Confirm What Legal Product You Are Buying
The agreement should identify the actual product clearly enough that you can connect it to the regulatory pathway you investigated before signing.
Is it:
California Factory-Built Housing?
HUD-code manufactured housing?
Panelized construction?
Site-built components?
A recreational vehicle or park model?
Another construction system?
For California Factory-Built Housing, HCD requires qualifying FBH units, components, and systems offered for sale to first users in California to bear an HCD insignia before shipment.
If the sales team has repeatedly described the product as California FBH, the contract should not suddenly become vague and call it merely a 'prefabricated structure.'
The legal identity of the product should not disappear when the sales conversation becomes a contract.
Confirm the Exact Model and Configuration
Make sure you can identify what is being manufactured.
Confirm:
Model name or number.
Square footage.
Number of modules or panels.
Floor plan.
Exterior configuration.
Major structural options.
Bedrooms and bathrooms.
Ceiling or roof options.
Window package.
Finish package.
Appliances and equipment.
Any custom modifications.
If plans, specifications, finish schedules, or option sheets define the product, determine whether those documents are actually incorporated into the agreement.
Do not assume the rendering is part of the contract.
Confirm What Is Included in the Price
Find the scope.
Then go line by line.
Does the stated price include:
Design and engineering?
Factory plans?
California approval documentation?
Local permit drawings?
Foundation engineering?
Foundation construction?
Transportation?
Oversize-load permits?
Pilot cars?
Crane?
Set crew?
Module connections?
Roof completion?
Exterior finish completion?
Interior marriage-line work?
Utility connections?
Stairs and landings?
Site cleanup?
Warranty service?
You are trying to determine whether the contract price is the price of the factory product, the installed building, or something closer to the completed project.
Those are very different numbers.
Confirm the Exclusions
This may be the most important section in the agreement.
Read every exclusion and translate it into a real project task.
Common exclusions can include:
Permits and agency fees.
Surveying.
Soils reports.
Civil engineering.
Grading.
Foundation.
Retaining walls.
Drainage.
Driveway and fire access.
Septic.
Sewer.
Well or water connection.
Electrical service upgrades.
Utility-company charges.
Transportation beyond a stated point.
Crane.
Site preparation.
Onsite finish work.
Landscaping.
Unforeseen site conditions.
For every excluded item, ask:
Who is doing this, and what is it likely to cost?
An exclusion is not necessarily bad.
An exclusion you did not budget for is.
Confirm What 'Turnkey' Means - If That Word Appears Anywhere
If the proposal, website, or salesperson uses the word turnkey, find out whether the contract defines it.
Does turnkey mean:
Factory product plus delivery?
Factory product plus installation?
Building complete but utilities excluded?
Permit through final inspection?
Actual move-in-ready project?
If the contract contains pages of exclusions, those exclusions define turnkey more accurately than the headline does.
Turnkey is marketing language until the contract turns it into a scope of work.
Confirm Who Handles Local Permitting
For California FBH, HCD confirms that factory approval does not eliminate local installation review. The approved factory plans must be submitted to the local agency, and installation is subject to local building-department inspection.
Your contract should make clear who handles the local side.
Confirm:
Who prepares the local permit package.
Who prepares the site plan.
Who prepares the foundation plans.
Who submits the application.
Who pays permit and agency fees.
Who communicates with the jurisdiction.
Who responds to plan-check corrections.
Who revises factory documents if necessary.
Who schedules inspections.
Who handles final sign-off.
'Permit assistance included' is not enough. Confirm what assistance means.
Confirm Whether Approval Is Promised, Assisted, or Entirely Your Risk
Look carefully at language involving permitting.
There is a major difference between:
We prepare permit documents.
We assist with permitting.
We submit permits.
We guarantee approval.
Owner is solely responsible for all governmental approvals.
A company may reasonably refuse to guarantee that a local agency will approve a project.
But you need to understand who bears the financial risk if it does not.
That becomes especially important when deposits become nonrefundable before local feasibility is established.
Confirm What Happens If the Project Cannot Be Permitted
This deserves its own section in your review.
What happens if:
The intended use is not allowed.
Setbacks or development standards prevent the project.
Fire access cannot be satisfied.
Septic cannot be approved.
The foundation becomes infeasible.
A required site improvement makes the project financially impractical.
The jurisdiction will not accept the proposed product or configuration.
Does the agreement allow cancellation?
Is any portion of the deposit refundable?
Are design or engineering costs retained?
Can the unit be transferred to another site?
Can you change models?
Do not wait until the permit fails to discover that the contract already assigned that entire risk to you.
Confirm the Deposit Amount and Exactly When It Becomes Nonrefundable
Do not stop at the amount of the deposit.
Confirm:
Who receives it.
What it pays for.
Whether it is refundable.
What portion becomes nonrefundable.
What event makes it nonrefundable.
Whether that event is tied to design, engineering, material ordering, production, or merely the passage of time.
What happens if the seller cancels.
What happens if the buyer cancels.
What happens if permitting fails.
A factory purchase agreement may legitimately have a very different deposit structure from a California home-improvement construction contract.
That distinction matters.
Do Not Confuse a Factory Purchase Agreement With a Home-Improvement Contract
A prefab project can involve separate legal agreements covering different things.
For applicable California home-improvement work, CSLB states that written contracts are required for projects over $500 and that the contractor down payment generally cannot exceed $1,000 or 10 percent of the contract price, whichever is less, subject to a rare blanket performance-and-payment-bond exception.
CSLB also says progress payments generally cannot exceed the value of work performed or materials delivered.
Those contractor rules do not mean that every factory purchase agreement has the same payment structure.
The important question is: Which agreement is this payment being made under, to whom, and for what?
Confirm the Entire Payment Schedule
Write the payment schedule out separately if necessary.
For every payment, identify:
Amount or percentage.
Triggering milestone.
Who receives it.
What work has been completed.
What materials have been produced or delivered.
Whether the payment is refundable.
Whether title or ownership to anything transfers.
What happens if the next stage never occurs.
Be especially cautious when payment milestones are based on vague events such as:
Engineering substantially complete.
Production preparation.
Materials allocated.
Unit ready for scheduling.
Ask what those terms objectively mean.
You should be able to tell what value exists after every major payment.
Confirm Whether the Price Is Actually Fixed
A quoted price and a fixed price are not necessarily the same thing.
Look for provisions allowing changes because of:
Material-price increases.
Labor increases.
Freight increases.
Fuel surcharges.
Code changes.
Tariffs.
Supplier substitutions.
Engineering changes.
Permit requirements.
Production delays.
Site conditions.
Some escalation clauses are reasonable, particularly when a project will not enter production for months.
But confirm:
What can increase.
How the increase is calculated.
Whether there is a cap.
Whether documentation must be provided.
Whether you can cancel if the increase exceeds a certain amount.
If the company calls the price fixed, the escalation language should agree.
Confirm the Allowances
An allowance is not a final price.
If the agreement includes allowances for:
Foundation.
Site work.
Transportation.
Crane.
Utilities.
Finishes.
Permitting.
Engineering.
confirm what assumptions created each allowance.
Ask what happens when the actual cost exceeds it.
Also ask what happens if the actual cost is lower.
A project with many large allowances may be impossible to compare fairly with a proposal that includes firm pricing.
Confirm Site Assumptions
Many prefab contracts price the building using assumptions about the property.
Find them.
They may include assumptions about:
Level building pad.
Normal soil.
No rock.
Standard foundation.
Easy truck access.
Standard crane reach.
Nearby utilities.
No retaining walls.
No unusual drainage.
No environmental constraints.
No special fire-access work.
If your property does not match those assumptions, the quoted price may not apply.
The site assumptions are part of the price whether or not they appear on the price page.
Confirm Who Is Responsible for the Foundation
The factory and foundation must physically match.
Confirm:
Who designs the foundation.
Who provides the manufacturer's loading and connection criteria.
Who coordinates the foundation drawings with the current factory drawings.
Who builds the foundation.
Who verifies dimensions before shipment.
Who verifies anchor locations.
Who pays if the factory and foundation do not match.
Do not accept a contractual gap where the manufacturer says 'foundation by others' and the contractor says 'per manufacturer's plans' without anyone clearly owning coordination.
Confirm Delivery - All the Way to the Actual Site
Delivery included can mean many things.
Confirm the exact delivery point.
Does the price include:
Factory-to-property transportation.
Oversize permits.
Pilot cars.
Route surveys.
Private-road travel.
Final driveway access.
Staging.
Waiting time.
Redelivery if the site is not ready.
Who determines whether the route is feasible?
Who verifies the final turn, gate, bridge, slope, overhead wires, and staging area?
'Delivered to site' should identify what the contract considers the site.
Confirm the Crane and Set
If the building requires a crane, determine whether it is included.
Confirm:
Who hires the crane.
Who determines crane size.
Who provides module weights.
Who confirms crane location.
Who confirms ground bearing conditions.
Who coordinates trucks and set sequence.
Who provides rigging.
Who pays standby time.
Who pays if a second mobilization is required.
A single bad assumption on set day can create a very expensive change.
Confirm When Risk of Loss Transfers
This is a contract term many buyers never think about.
What happens if the unit is damaged:
At the factory.
While stored.
During loading.
During transportation.
During crane operations.
After placement but before project completion.
At what point does the risk become yours?
Who insures the building at each stage?
Who files the claim?
Who pays the deductible?
You want the contract and the insurance coverage to meet each other without a gap.
Confirm Storage Terms
Your house may be completed before your site is ready.
Confirm:
How long the factory will store it.
Whether free storage is included.
When storage charges begin.
Where it will be stored.
How it will be weather-protected.
Who bears risk during storage.
Whether the manufacturer can force delivery.
What happens if you cannot accept delivery.
Storage terms matter particularly when permit, foundation, utility, or weather delays are possible.
Confirm the Production Schedule - and What It Actually Means
Does the agreement promise:
A design-start date?
A production-start date?
A production slot?
A factory-completion date?
A shipping date?
An installation date?
A final-completion date?
Those are not interchangeable.
Watch for broad language allowing the company to change the schedule for supply-chain problems, labor shortages, weather, governmental delays, transportation problems, or other causes.
Some flexibility is normal.
But determine whether the contract provides any remedy if delay becomes extreme.
Confirm What Happens If the Manufacturer Is Late
Ask the uncomfortable question before signing.
If the manufacturer misses the estimated completion date by:
30 days.
90 days.
Six months.
A year.
what happens?
Can you cancel?
Does your deposit remain locked in?
Does the contract provide credits or damages?
Can the company extend indefinitely under a force-majeure or permissible-delay clause?
You may accept a contract with broad delay protections.
Just understand what you are accepting.
Confirm What Happens If You Are Late
Contracts often treat owner delays differently from manufacturer delays.
Confirm what happens if you are late with:
Selections.
Permit approvals.
Foundation completion.
Site readiness.
Payments.
Utility work.
Delivery acceptance.
Possible consequences may include schedule loss, storage fees, remobilization, escalation, or cancellation.
Know the consequences before the schedule gets tight.
Confirm the Change-Order Process
Changes happen.
The contract should tell you how they become authorized.
For applicable California home-improvement work, CSLB requires changes to price or scope to be documented in a written change order signed before the changed work is performed.
For the overall prefab project, confirm:
Who can request a change.
Who can approve a change.
Whether verbal approvals count.
What markup applies.
How schedule impacts are calculated.
How credits are handled.
Whether the factory can make substitutions without approval.
Nobody should be able to create a large additional obligation for you through an undocumented conversation.
Confirm Material-Substitution Rights
Supply problems happen.
Find out whether the company can substitute:
Windows.
Siding.
Roofing.
Flooring.
Cabinetry.
Fixtures.
Appliances.
HVAC equipment.
Structural materials.
Does the substitute have to be equal or better?
Who decides equivalency?
Does a visible or material change require your approval?
Does a substitution affecting approved plans require additional approval?
'Comparable product' can be a very broad phrase.
Confirm What Happens When the Building Department Requires a Change
Plan check and inspections can create revisions.
Confirm who pays when the jurisdiction requires:
A site-plan revision.
A foundation change.
A factory drawing revision.
Additional engineering.
A code-related product change.
A field correction.
Additional documentation.
Some changes may legitimately be outside the original scope.
But the contract should give you a framework for determining responsibility rather than simply saying all governmental requirements are the owner's cost.
Confirm Who Handles Inspection Corrections
For California FBH, the factory portion is approved through the HCD system, while installation is subject to local building-department inspection.
That creates a handoff.
Confirm who handles corrections involving:
Factory construction.
Foundation.
Installation.
Module connections.
Site utilities.
Local code requirements.
Damage or modification after installation.
HCD states that alterations to FBH after installation require local building-department approval.
That means 'we'll fix it in the field' may involve more than sending someone with tools.
Confirm the Warranty - Then Confirm Who Actually Performs the Work
Find the written warranty.
Confirm:
What is covered.
What is excluded.
How long coverage lasts.
When the warranty begins.
How a claim is submitted.
How quickly the company must respond, if stated.
Who inspects the problem.
Who performs repairs in your area.
Who pays travel.
Who pays removal or access costs.
Whether transportation or installation damage is covered separately.
Prefab projects can have separate factory, installer, contractor, appliance, roofing, window, and equipment warranties.
'Ten-year warranty' means very little until you know ten years of what, provided by whom.
Confirm Who Owns the Factory/Site Interface Problems
Some of the most difficult disputes occur where two scopes meet.
What happens if:
The foundation does not match the module.
A factory utility penetration is misplaced.
The roof connection leaks.
A module is damaged during set.
The onsite finish crew damages factory work.
A factory defect is discovered after installation.
Read the manufacturer agreement and contractor agreement together.
If each contract excludes responsibility for the same interface, you have found a gap.
Confirm Cancellation Rights and Termination
Do not assume you can simply cancel because construction has not started.
Confirm:
Your statutory cancellation rights, if applicable.
Any contractual cancellation period.
What happens to the deposit.
What costs the company can retain.
Whether custom materials become yours.
Whether engineering documents will be released.
Whether the manufacturer can terminate.
What happens if either party materially breaches the agreement.
For applicable California home-improvement contracts, CSLB notes that cancellation rights and required notices are part of the statutory contract framework.
A factory purchase agreement may have different cancellation provisions.
Know which agreement you are signing.
Confirm What Happens if the Company Fails
This is uncomfortable and important.
What does the contract say if the company:
Stops production.
Closes the factory.
Files bankruptcy.
Loses its contractor.
Cannot obtain materials.
Cannot deliver your unit.
Terminates its relationship with the installer.
Does the agreement say anything about ownership of work in progress or materials purchased for your unit?
Will plans and engineering be released?
Can another manufacturer or contractor finish the project?
The contract cannot eliminate business risk.
It can tell you how much of that risk you are accepting.
Confirm Dispute Resolution
Find the section usually nobody wants to read.
Does the contract require:
Informal dispute resolution.
Mediation.
Binding arbitration.
Court litigation.
A particular county or state as the venue.
Attorney-fee shifting.
Also look for limits on damages, warranty disclaimers, shortened claim periods, and provisions requiring notice within a specific time.
If a dispute clause is difficult to understand, this is a reasonable place to have a California attorney review it before signing.
The dispute section tells you where the contract expects you to go when cooperation ends.
Confirm That Sales Promises Made It Into the Contract
Before signing, make a list of the statements that caused you to choose this company.
Maybe you were told:
Permitting is included.
Delivery is included.
The deposit is refundable.
The price is fixed.
The unit will be completed by a certain date.
The company has local warranty service.
The foundation is included.
The project is turnkey.
The model is approved for California.
Now find those promises in the agreement or incorporated documents.
CSLB specifically advises homeowners to put verbal promises into the written home-improvement contract.
That is good advice beyond contractor agreements too.
If a promise matters enough to make you buy, it matters enough to put in writing.
Confirm Which Documents Control When They Conflict
A prefab deal may include:
Main contract.
Proposal.
Specifications.
Plans.
Finish schedule.
Option sheet.
Warranty.
Terms and conditions.
Installation agreement.
Change orders.
Website representations or brochures.
The contract may contain an order of precedence or an entire agreement clause.
That can mean the signed contract overrides earlier emails, proposals, brochures, or conversations.
Confirm which documents are actually part of the agreement.
Do not assume the glossy specification sheet controls if the contract says otherwise.
Confirm Every Blank Is Filled In
Do not sign a contract with material blanks to be completed later.
Confirm:
Price.
Model.
Scope.
Payment schedule.
Dates where required.
Allowances.
Selections already made.
Included attachments.
Contractor information.
Permit responsibility.
Any negotiated changes.
If something is intentionally not yet known, the contract should explain how and when it will be determined.
Confirm the Attachments Are Actually Attached
If the agreement refers to:
Exhibit A.
Scope of Work.
Specifications.
Plan Set.
Finish Schedule.
Allowance Schedule.
Warranty.
Delivery Terms.
make sure you received them.
Then confirm they are the correct version.
An agreement incorporating a missing exhibit is not something I would casually sign.
Confirm the Contract Matches the Current Plans
Prefab projects evolve quickly.
Make sure the contract is not based on:
An earlier floor plan.
An old square footage.
A prior finish package.
A superseded engineering revision.
A different foundation assumption.
A different site address.
Put revision dates or plan identifiers into the agreement where appropriate.
The contract, plans, and price should describe the same project.
Confirm What You Still Have to Buy After Signing
Before you sign, create a second budget called:
NOT IN THIS CONTRACT.
Put everything excluded into it.
That may include:
Permit fees.
Survey.
Soils.
Foundation.
Grading.
Septic.
Well.
Utilities.
Fire-access improvements.
Transportation.
Crane.
Decks and stairs.
Driveway.
Landscaping.
Financing costs.
Consultants.
Contingency.
Then add the contract price and the excluded-work budget together.
That is much closer to the number you should be using to decide whether the project makes financial sense.
A Simple Contract Confirmation Checklist
Before signing, I would want to be able to say:
I know exactly which legal entity I am contracting with.
I know exactly what legal construction product I am buying.
The model, plans, specifications, and options are identified.
I know what the price includes.
I know what the price excludes.
I know what 'turnkey' means in this contract, if the word is used.
I know who handles local permitting.
I know what happens if the project cannot be permitted.
I know the deposit rules and when money becomes nonrefundable.
I understand every major payment milestone.
I know whether and how the price can increase.
I understand all allowances and site assumptions.
I know who designs and builds the foundation.
I know exactly where delivery ends.
I know who pays for crane and set.
I know when risk of loss transfers.
I understand storage charges and delay provisions.
I know how changes and substitutions are approved.
I know who pays for jurisdiction-required changes.
I know who handles inspection corrections.
I have the actual warranty.
I know who performs warranty work locally.
I know what happens at the factory/site handoff.
I understand cancellation and termination.
I understand the dispute-resolution provision.
Important sales promises are in writing.
Every referenced exhibit is attached.
The contract and current plans describe the same project.
I have budgeted the work that is not in this contract.
If you cannot confidently check one of those boxes, that does not automatically mean the deal is bad.
It means you found something to resolve before you sign.
The Bottom Line
A contract does not need to eliminate every construction risk.
It needs to tell you which risks you are accepting.
By the time you sign, you should know what you are buying, who is responsible for each part of the project, what is excluded, when your money becomes committed, how the price can change, what happens when the project is delayed, and what happens if the building cannot be permitted or installed as planned.
The goal is not to read the contract. The goal is to confirm that the contract describes the deal you actually intend to make.
Looking Ahead
Next: Prefab Warranties: What Is Actually Covered After the House Arrives?
We will look at factory warranties, installer warranties, contractor workmanship, transportation damage, appliances and equipment, module connections, response times, exclusions, and the very practical question of who actually comes to your property when something goes wrong.
If you are considering a California prefab, modular, manufactured, panelized, tiny-home, ADU, or SFR project, Buchanan Land Use Consulting can help evaluate the permitting and site-development side before you commit to the product.
Continue Reading
Previous: Factory Tour: What to Look for Before You Order a Prefab Home
Next: Prefab Warranties: What Is Actually Covered After the House Arrives?
