Buying a car wash in the US: what to check before you pay

A car wash sells water, and the ground under it may hold fuel tanks. So before you pay a deposit, find out where the wash water goes and on what paper, and whether a tank on the site ever leaked. In California, a new operator at the same site, offering the same services, can in some circumstances be held responsible for wages the old operator did not pay.

General information, not legal, tax or environmental advice. Rules differ by state, city and utility. We read every source below on 29 October 2026.

In short: five checks before the deposit

Get the paper that lets the wash water into the sewer.
Find out whether a fuel tank on the site ever leaked.
If the land is in the deal, order an environmental study before you sign.
In California, check the registration, the bond and old unpaid wages.
Find out who has a claim on the equipment.

First ask the seller for the exact address of the site and the legal name of the company that runs the wash.

Step 1. Find out where the wash water goes, and on what paper

Each state and sewer utility has its own rules for wash water. Two examples:

Texas. The state environmental agency, TCEQ, tells car washes to get the local wastewater plant's approval to send wash water into the sewer, and to "retain a copy of your correspondence and any replies you receive". Where there is no sewer, "Discharging to a septic system is prohibited." Grit trap waste (the sand and dirt caught in a pit) may only be hauled by a TCEQ-registered transporter. A device that stops wash water flowing back into the drinking water pipe must be tested when installed "and at least annually thereafter" (TCEQ guide RG-434, revised June 2026).
Florida. A state general permit covers car washes that treat, dispose of or recycle their water. A wash outside it, and not exempt, needs an industrial wastewater permit or a connection to a treatment plant that can take its water (Rule 62-660.803).

Ask the seller for:

the letter or permit that allows the wash water into the sewer, or the permit for recycling it;
the grit trap pumping records, with the name of the hauler;
the last test reports for the backflow device;
any notice from the sewer utility or the state.

Ask the utility, in writing, whether a new owner must apply again.

Step 2. Find out whether a fuel tank on the site ever leaked

A tank that leaked can leave a cleanup bill tied to the site.

In Texas, see the TCEQ guide for buyers of sites with fuel tanks (RG-475a, revised December 2023):

The state tank database "may also show whether the facility is, or ever was, registered as an LPST site", that is, a leaking petroleum storage tank site. It does not replace old paper records.
"A buyer inherits the compliance history rating of the facility they purchase." A poor rating can mean refused permits. Look the site up in the Central Registry and the compliance history search.
Buyer and seller can agree on who pays for a cleanup, but "TCEQ will not be bound by any agreement between the parties".
Within 30 days of the sale, the buyer registers the tank in the buyer's own name.

In Florida, search the state's storage tank records by address. The state warns that its file of scanned documents "may not have every paper document available in electronic format".

In any state, two federal maps give a first look: EPA UST Finder shows underground tanks and leaks (state data as of 2018–2019), and EPA ECHO shows inspections and enforcement. An empty map is not proof that nothing leaked.

Step 3. If you buy the land: an environmental study before you sign

Ask an environmental professional for a Phase I study before you sign: a report on what the site was used for and what the records show. Under US federal law, a buyer of land who did such a study in the year before buying may be able to claim protection from paying for old pollution on it (EPA). If you only take over a lease, ask your attorney what a leak on the site would mean for you as the operator.

Step 4. In California: registration, a bond, and the old operator's wages

Registration. Car washing and polishing businesses must register with the Labor Commissioner, with four exceptions. One is a self-service or machine wash whose only employees work at the cash register or look after the equipment. The yearly fees are "$300 per location" (DIR). Look a registration up in the DIR search.
The bond. A $150,000 surety bond "must be continuously in place": an insurance company's promise to pay workers if the employer does not. A wash with a collective bargaining agreement (a union contract) does not need one (DIR document list).
The old operator's wages. Labor Code §2066 can make a "successor" pay the wages and penalties a previous car wash employer owed. One of four cases is a business that "uses substantially the same facilities or workforce to offer substantially the same services as the predecessor employer." The state's notice to buyers tells them to "conduct thorough due diligence" (DIR notice, August 2013).

Ask the seller for:

the registration number;
the bond, with the name of the insurance company;
the payroll records for the last three years, which California law requires a car wash to keep;
a written list of any wage claims, inspections or lawsuits, open or closed.

Ask your attorney about an indemnity in the contract: the seller's promise to pay you back if old wage debts reach you.

One Los Angeles case: the new operator had not even bought the business

A car wash on Sunset Boulevard in Los Angeles had not paid its workers minimum wage and overtime. The lender on the land foreclosed, that is, took the land for the unpaid loan, evicted the operator, and leased the same premises to a new company.

The state sued the new company for the old operator's wages and penalties. The trial court held that it was a successor under §2066: it ran a wash at the same location with the same services. The two sides then agreed on a judgment of $120,000. On 16 May 2012 the Court of Appeal upheld the judgment, agreeing that "the fact of foreclosure is irrelevant". It added that a person starting a car wash business "may protect itself by the exercise of due diligence, indemnity agreements, or insurance" (People ex rel. Harris v. Sunset Car Wash, LLC, 205 Cal.App.4th 1433). One of the appeal judges disagreed; that judge wrote that the complaint had asked for $730,000.

So ask the Step 4 questions even when you do not buy from the old owner.

Step 5. Find out who has a claim on the equipment

Conveyors, brushes and pay stations may be leased, or pledged to a lender. Lenders record such claims in UCC records: public files kept by the state where the company was formed (UCC §9-307(e)). That may not be the state of the car wash. How to search is in our note on UCC lien searches. Ask the seller for a list of every loan and lease on the equipment.

Our count: the typical SBA loan to buy a car wash is $1.2 million

The SBA (U.S. Small Business Administration) backs bank loans to small firms. In its public 7(a) loan file (data as of 30 June 2026, fiscal years 2020–2025, cancelled loans left out), 258 of 1,437 loans to car washes (code 811192) paid for an existing wash: 18%, against 10.8% across all industries; the real share may be higher. Their median was $1,203,900, against $675,000 for an existing business in any industry. A loan is not the price and can include the land, but with that much borrowed, an old leak or wage debt leaves little room. The limits of the count are in our laundromat article.

What the extension shows

The PDF report from our free extension has lines for the papers behind the figures, the lease and the licences. "The extension does not guess: when the page is not clear, the line says “not stated”." If the licences line says "not stated", ask the seller which permits the wash holds, starting with the sewer approval. More in our due diligence guide.

Your next three steps

The extension. On a computer: Add to Chrome — free or Add to Edge — free. Reading on your phone? Open this page on your computer. "Open a business-for-sale listing and press “Download PDF”. You get a report on the 12 things a check of the business needs: what the listing says about each, and which ones it does not say."
Your account. "Saving a listing takes a My list account. In it, the listings you save from different sites sit in one place." Create my account.
The check. The €550 report shows, "from the public records, which debts can follow the business under the rules that apply where it is, and what decides whether the permit and lease pass to you". Start for €550. The €950 report also reads the seller's own papers, and adds "How much, by the documents, was left to the owner after costs." Start for €950. "Within 12 weeks of receiving the €550 report, pay the price difference for the €950 report: what you paid counts in full." Both are on our pricing page. We do not contact the seller. "You pay only if we take it on."

See a sample report Start my check

Sources

TCEQ RG-434, Environmental Rules for Car Washes (revised June 2026) (retrieved 29 October 2026)
TCEQ RG-475a, Buying or Selling Property with Petroleum Storage Tanks (revised December 2023) (retrieved 29 October 2026)
TCEQ, Central Registry (retrieved 29 October 2026)
TCEQ, Compliance History Search (retrieved 29 October 2026)
Florida Administrative Code, Rule 62-660.803, General Permit for Car Wash Systems (retrieved 29 October 2026)
Florida DEP, Storage Tank and Petroleum Contamination page, with links to Storage Tank/Contaminated Facility Search II and OCULUS (retrieved 29 October 2026)
EPA, UST Finder (last updated 19 January 2026) (retrieved 29 October 2026)
EPA, Enforcement and Compliance History Online (ECHO) (retrieved 29 October 2026)
EPA, Brownfields All Appropriate Inquiries (last updated 7 May 2026) (retrieved 29 October 2026)
California DIR, Labor Commissioner: Car Washing and Polishing (page dated April 2020) (retrieved 29 October 2026)
California DIR, Car Wash Registration Document Requirements (July 2019) (retrieved 29 October 2026)
California DIR, Notice to carwash applicants, Labor Code §2066 (August 2013) (retrieved 29 October 2026)
California DIR, Car Wash Registration Search (retrieved 29 October 2026)
People ex rel. Harris v. Sunset Car Wash, LLC (2012) 205 Cal.App.4th 1433, California Court of Appeal, No. B233915 (text read on CourtListener) (retrieved 29 October 2026)
Uniform Commercial Code §9-307 (location of debtor), Cornell Law School LII (retrieved 29 October 2026)
SBA, 7(a) & 504 FOIA loan data (as of 30 June 2026) (retrieved 29 October 2026)