The average cost of a plumbing inspection is $100 to $1,300, depending on the type:

• Visual inspection – A visual plumbing inspection costs $100 to $200 and includes only a visual assessment of the plumbing pipes, water lines, drains, fixtures, and water heaters.
• Camera or video inspection – A camera or video plumbing inspection costs $300 to $1,100. The plumber feeds a high-resolution camera on a narrow cable through the pipes and water lines to locate blockages or identify issues.
• Combination inspection – Plumbers charge $400 to $1,300 for a combined visual and camera inspection.

During a plumbing inspection, plumbers look for leaks, damage, or corrosion and make sure these fixtures are installed properly:

• Toilets
• Sinks
• Bathtubs and showers
• Faucets
• Pipes and fittings
• Appliances that use water
• Water heaters
• Main shut-off valve
• Sump pumps
• Outdoor hose bibs

Some plumbers also perform water pressure and water quality checks during the inspection.

A plumbing inspection typically takes 1 to 3 hours, depending on the size of your home and whether the plumber notices any issues along the way. Camera and combination inspections usually take longer than basic visual inspections because they're more thorough and require extra equipment.

Professionals recommend plumbing inspections every 1 to 2 years or before buying or selling a home. A standard home inspection costs $250 to $500+ but typically doesn't include a thorough evaluation of the plumbing.

You should also get an inspection if you notice:

• Ongoing water temperature fluctuations
• Strange sounds coming from your pipes
• Odors in drains. 

Regular inspections can help you catch issues before they escalate, which will prevent more costly repairs.

Before hiring a plumbing inspector near you, follow these steps:

• Get at least three inspection estimates to compare.
• Look for plumbing companies that have 5+ years of experience.
• Check out their company reviews on HomeGuide and Google.
• Verify their company's insurance, license, and bonds.
• Avoid the lowest quotes as quality may suffer.
• Get a written estimate, contract, and warranty before the inspection begins.
• Never pay in full before the inspection is done.

Ask these questions to find a high-quality inspector:

• How long have you been in business?
• Do you have any relevant plumbing certifications?
• Are you licensed, bonded, and insured?
• How long will this inspection take?
• Do you recommend a visual or camera inspection? Why?
• Will there be any cleanup afterward, and is it included in this estimate?
• What other fees should I expect?
• Do you offer a warranty or guarantee on this?