How to Choose a Pressure Washing Company in Southern California

There are a lot of pressure washing companies in Southern California, and from the outside most of them look the same: a truck, a surface cleaner, and a few good photos. The difference shows up after the job, in whether the surface is evenly clean, whether anything was damaged, and whether the company stood behind the work. This guide covers what to check before you hire anyone, including us.

1. Check licensing and insurance

In California, any job worth $1,000 or more in labor and materials must be done by a contractor licensed by the Contractors State License Board (CSLB). If a company says it is licensed, ask for the license number and look it up on the CSLB website. The lookup shows whether the license is active and what bonds and workers’ compensation are on file.

Ask for proof of general liability insurance too. Pressure washing involves ladders, high-pressure water and work near windows, roofs, landscaping and cars. If something gets damaged, you want the company’s insurance to cover it, not your homeowner’s policy.

2. Ask how they will clean each surface

Good companies do not use one pressure setting for everything. Concrete driveways can usually take higher pressure and a surface cleaner. Stucco, painted siding, wood, pavers and roof tiles need a gentler approach, and some need soft washing (low pressure with a cleaning solution) instead. Too much pressure can etch concrete, strip paint, wash out paver joint sand, or force water behind siding and window frames.

A simple test: ask, “How will you clean my driveway, and how will you clean my walls?” If the answer is the same for both, keep looking. If you are considering doing it yourself, our guide to common pressure washing mistakes covers what goes wrong most often.

3. Ask what is included, in writing

Quotes that look similar can cover very different work. Before you compare prices, make sure each quote spells out:

• Which areas are included (driveway, walkways, patio, walls, steps, curbs)
• Whether stain treatment for oil, rust or efflorescence is included or extra
• Whether sealing or joint sand is part of the job or a separate service
• Who provides water, and what happens if a hose bib is not available
• What the company will do if you are not satisfied

Be realistic about stains. Old oil, rust and hard-water deposits can often be lightened a lot but not always removed completely. A company that promises every stain will disappear before seeing it is guessing.

4. Ask how they handle wash water

Many Southern California cities restrict letting dirty wash water run into the street and storm drains, especially water that carries oil, grease or cleaning chemicals. This matters most for commercial properties, but it is a fair question for any job. A professional company will be able to explain how it protects drains, plants and pets on your property.

5. Look at real work and real reviews

Ask for before-and-after photos of jobs similar to yours, ideally from your area. Read reviews on Google and Yelp, and pay attention to how the company responds to problems, not just how many five-star ratings it has. Reviews that mention specific details (the crew’s name, the surface, how the job went) are more useful than one-line ratings.

Be careful with “best company” lists, including ones published by pressure washing companies themselves. They are often marketing rather than independent rankings.

6. Ask about the walkthrough

Find out whether the company does a final walkthrough with you before leaving, and whether it takes before-and-after photos. A walkthrough is the easiest time to point out a spot that was missed, while the crew and equipment are still there.

7. Compare value, not just price

The lowest quote is not always the cheapest job. Missing insurance, rushed work or the wrong cleaning method can turn into repairs that cost more than the cleaning did. Compare what each quote includes, how the company answered your questions, and how comfortable you feel with them working on your property.

Questions to ask before you hire

• What is your CSLB license number, and can you send proof of insurance?
• How will you clean each surface on my property, and at what pressure?
• What exactly is included in this quote, and what would cost extra?
• How do you handle wash water and protect plants, drains and pets?
• Can I see photos of similar jobs nearby?
• Will we do a walkthrough together when you finish?

About this guide

This guide was written by Foothill Pressure Washing, a licensed exterior cleaning contractor in San Dimas (CSLB #1146426). We think these are the right questions to ask any company, including us. If you would like us to answer them for your property, see our residential services and commercial services, or request a free quote.