Post-construction cleaning insurance: what one California contractor's subcontract form asks a cleaner to carry

The client is a builder or a remodeler, and the job is the last one on the schedule: dust in every drawer, stickers on every window, paint on a floor you were told was protected. You already clean houses. This page rests on one document: a California builder's subcontractor insurance form, written for trades like grading, roofing and plumbing, where the cleaner signs the same form. It is one contractor's wording, so read it as a worked example, not a rulebook. Every page cited below was read on October 1, 2026.

What carriers say adding the work does to your policy

None of the carrier pages we read prices post-construction cleaning, so there is no published premium to quote. They do say the job changes the risk.

Simply Business's cleaning FAQ says cleaning post-construction sites, along with medical facilities and schools, will likely raise your premium because of the greater chance of accidents and liability claims, and it cites debris and dust. Moody, an independent agency that serves cleaning companies, says a business specializing in post-construction cleanups may deal with debris, unstable surfaces or working at heights, and that adding services like post-construction cleanup may bring risks the original policy didn't account for. ERGO NEXT lists post-construction cleaning crews among its examples of specialty cleaning that carries more risk from equipment, chemicals and higher-risk tasks.

The practical step is the one Moody implies. Tell your agent before you bid, not after the first certificate request. A policy rated for kitchens and bathrooms may not list the work, and the premium may change when it does.

One real subcontract, line by line

W. L. Butler Construction, a California general contractor, publishes its subcontractor insurance requirements as a PDF. The copy we read is marked Rev. 08/18, so treat it as a sample of how one contractor writes the page, not as a standard. Cleaning isn't one of the trades it names. The form is for every subcontractor and says the contractor may designate other trades for higher requirements.

Item	What the form asks	The question for your agent
General liability	$1,000,000 per occurrence, $2,000,000 general aggregate, on forms at least as broad as ISO CG 00 01; the aggregate must apply separately to the work under the subcontract	Can you issue a per-project aggregate?
Products and completed operations	$2,000,000 aggregate	Is that line on my declarations?
Additional insured	The contractor and the owner, on ISO CG 20 10 (11 85 edition), or CG 20 10 with CG 20 37 (10 01 editions), or equivalents, with completed operations included	Which of these forms do you issue?
Primary and non-contributory	Your policy pays first, theirs only after	Can you endorse that?
Waiver of subrogation	On general liability, auto and workers' comp	Is it blanket or per contract?
Workers' comp and employers' liability	As state law requires, with employers' liability of $1,000,000 for bodily injury	Do I have employees, or helpers I pay as contractors?
Auto	$1,000,000 for owned, hired and non-owned vehicles	Does my personal auto cover work driving?
Claims-made policies	Not allowed without the contractor's written consent	Is my general liability occurrence-based?
Insurer rating	A.M. Best A-VIII, unless the contractor approves	What is my carrier's rating?
Deductible	Over $25,000 needs approval	What is my deductible?
Cancellation	Certificates must give 30 days' written notice to the contractor	Do you give notice to certificate holders?

Two lines on that form have no homeowner equivalent.

The additional insured status that outlives your crew

The form says the additional insured provisions must include products and completed operations coverage, and must be maintained on every renewal through all applicable statute of limitation periods after the work is complete. On that wording, you can't let the policy lapse years after you wiped down the last window, because the contractor and the owner are still named on it.

Insureon's glossary explains the mechanism. An additional insured is anyone the policyholder adds to the policy, generally benefiting from it without managing it. A blanket endorsement can cover a group that isn't named one by one, and the certificate of insurance is how a client checks the status. It also says workers' comp can't carry an additional insured amendment, though you can add a waiver of subrogation, which acts similarly. The certificate of insurance guide shows how a condo HOA writes its own version of this request.

The form also says what happens if you don't comply: the contractor may buy the coverage and charge you for it, or terminate the subcontract. Its "Modified Occurrence" policies are refused outright, in its words, under any circumstances.

Your 1099 helpers become a tier under the form

Subcontractors under the form must require every tier below them to carry insurance in like form and amounts, with the same additional insured endorsement. On the form's wording, a house cleaner who sends a 1099 helper to finish a floor has created a tier. Moody makes the practical point from the carrier side: independent contractors aren't automatically covered under your workers' comp or liability, and depending on how they're classified they can be a significant source of exposure. The workers' comp guide lists state thresholds, and the janitorial insurance page covers the limits commercial clients write into their vendor policies.

Pollution liability, and when the form asks for it

The form's pollution liability requirement applies to two groups: subcontractors whose scope involves handling or transporting hazardous materials, and subcontractors in the listed trades such as grading, roofing and plumbing. The materials it names include asbestos, lead, silica and contaminated soil. The limits are $1,000,000 per incident and $2,000,000 aggregate.

Cleaning isn't one of the listed trades, and the form doesn't say whether sweeping up dust that might contain silica or lead counts as handling a hazardous material. The contractor can also designate other trades. The question to put to the superintendent is which category your scope falls in, in writing, before the certificate request arrives. The pressure washing page shows how a pollution exclusion can matter for runoff if your scope includes exterior work.

Licensing, and one federal rule to ask about

The only cleaning-specific state registration our cleaning business license page found is California's janitorial registration, which lets residential-only cleaners off. That page doesn't mention post-construction work.

EPA's lead page says anyone paid to perform work that disturbs painted surfaces in homes, childcare facilities and preschools built before 1978 must be certified, and their employees trained in lead-safe work practices. The page describes the rule in terms of disturbing paint, and says nothing about mopping or vacuuming. If your scope includes scraping or sanding anything painted in an older house, ask the contractor who holds the certification before you quote the job.

Questions to ask before you bid

• "What does the subcontract require, and can I see the insurance exhibit now?"
• "Do I need additional insured status on ongoing work, completed operations or both?"
• "How long must I keep the policy after final payment?"
• "Does anyone on my crew count as a subcontractor under your form?"
• "Will the contractor accept an occurrence-based general liability policy from my carrier?"

Ask the contractor for the exhibit in writing and forward it to your agent with the project address. The contracts guide shows the vendor documents other clients send a cleaner.