Rules
Part of Prefab studio sheds: six quote comparison criteria
How to vet installers for prefab studio sheds
For prefab studio sheds, responsibility splits between factory, dealer and local installer. Here is how to verify each one before you pay a deposit.
What to take away
- For prefab studio sheds, the purchase usually involves three parties, not one. Find out who they are before signing.
- The dealer who sells the unit is often not the company that prepares your site.
- The installer's license is a public record. Check it against the state contractor licensing board's register before you sign anything.
- Deposit protection matters more here than in site built work, because money moves earlier.
- Ask who is present on delivery day and who has authority to stop the set.
Work out who you are actually contracting with
Ask directly: who manufactures the unit, who sells it, who prepares the foundation, who sets it, and who connects the utilities. Sometimes that is one company.
Who Is Responsible For What
- Manufacturer: builds the unit
- Dealer: sells the unit
- Site contractor: prepares the foundation
- Setting crew: sets the unit
- Utility provider: connects utilities
More often it is three or four, and the gaps between them are where problems land. Nobody answerable for the site as a whole is one of the standard ways these builds come apart.
Then verify each one separately. Match the legal entity name on the contract to the business registration and the license, because trading names and legal names frequently differ. The Small Business Administration's explanation of registering a business is a useful reminder that the registered entity is what you have a contract with, not the brand on the truck.
Licensing is where that verification actually happens, and it is a state matter rather than a federal one. Every state board keeps a public register, and California's Contractors State License Board is a clean example: its license lookup checks a contractor license or a home improvement salesperson registration. On your own state's register, read three things: whether the license is active, what classification or endorsement it carries, and whether any enforcement actions are recorded. A license limited to one trade does not cover a whole building, so the class has to match the work you are buying.
Checks worth doing on each party
Checks worth doing
| Party | What to verify |
|---|---|
| Manufacturer | How long in production, what approvals the unit carries, warranty terms |
| Dealer | Legal entity, deposit terms, what they do and do not arrange |
| Site contractor | License class, insurance, local references, permit responsibility |
| Setting crew | Who employs them, crane arrangements, insurance on the lift |
Ask the site contractor for a certificate of insurance sent by the insurer, naming your address and the dates of work. Then read what it covers. General liability responds to damage to your property and to injuries on the site; workers compensation covers the crew if they employ one. Ask to be named as an additional insured on the liability policy, which is what puts your address on the certificate instead of the contractor's. OSHA's help for employers pages set out the obligations an employer carries for the people on your property, and a contractor who cannot describe theirs is telling you something.
Ask about the bond as well. Many states require a licensed contractor to carry a surety bond, so it is worth knowing what it would pay and how a claim is filed against it.
Then ask what the unit is approved as, because a factory built shell arrives with paperwork a site built studio never has. A manufactured home carries a federal HUD certification label; a modular building is approved through a state program, often by a third-party inspection agency. A studio shed may be neither, in which case local code and your building department's inspection govern it.
References close the loop. Ask each party for three customers from the past year, ask whether the setting crew was their own employees or subcontracted, and ask how long the punch list stayed open and who paid for what was on it.
Verify Each Party Separately
- Manufacturerproduction years, approvals, warranty terms
- Dealerlegal entity, deposit terms, scope arranged
- Site contractorlicense class, insurance, references, permits
- Setting crewemployer, crane arrangements, lift insurance
Deposit and payment questions
Prefab payment schedules front load, because production starts before anything appears in your yard. That is legitimate, but it changes your exposure compared with the way money leaves your account on a site built job.
- What exactly does the deposit secure, and is it refundable at any stage?
- Can the deposit sit in escrow or be paid by credit card, so you have a route back if the company stops answering?
- What happens if the site is not ready when the unit is finished?
- Who pays storage if delivery is delayed by permit review?
- Is the balance due on delivery or on completion of the site work?
- What is held back until snagging is closed?
Delivery day questions
- Who confirms the access route, and when do they physically inspect it?
- Who is responsible for tree trimming, fence removal or utility line clearance?
- Who has authority to stop the set if conditions are wrong?
- What happens to the driveway, and who repairs damage?
- Who checks the unit for transport damage before the crane leaves?
That last one matters. Damage found after the crane has gone becomes a much slower conversation.
Close the seams in writing
Name one responsible party for the foundation interface, the module joints and every utility penetration. If each company handles its own part, ask who fixes water coming in where two parts meet. Ask for a signed lien waiver from each party as it is paid, and hold the final payment back until the punch list is closed.
The full comparison checklist runs through what to compare between suppliers: unit dimensions, foundation tolerance, delivery access, electrical provisions and warranty terms. The order of work for any shed based studio shows which site tasks must finish before a delivery date can be trusted, from the foundation and the utility trench to the access route and the inspection sign-off.
