McDermott Plumbing

Company Facts

McDermott Plumbing at a Glance

By the numbers

Google rating

4.2out of 5

Customer reviews

18on Google

Rating and review count pulled from Google on September 4, 2026.

What We Like

• Backflow prevention testing and systems named as a core service, which many general plumbers do not offer
• Ohio plumbing licence number 47245 published openly on the company website
• Flat-rate pricing quoted before work begins, according to the company
• Broad residential and commercial list covering water lines, heaters, drains, gas lines and leak detection
• Owner-led operation described as fifth-generation, with reviews naming the owner on site

Things to Consider

• Published hours are weekdays only, 7 AM to 5 PM, with no weekend or emergency cover listed
• 4.2 from 18 reviews on the Google Business Profile as of September 4, 2026 is a small sample
• No pricing figures are published, so confirm any diagnostic or trip fee before booking
• Likely too small for large-scale commercial mechanical projects

Google rating

4.2

Based on 18 Google reviews

Review data updated September 4, 2026

View on Google Maps →

Rating Distribution

• 5 stars72%
• 3 stars11%
• 2 stars11%
• 1 star6%

Landlords, property managers and homeowners around central Ohio all need the same handful of things from a plumber, and the service list here covers most of them. Water line repair and replacement, water heater work of both the repair and swap-out kind, drain cleaning, gas line work, backflow prevention systems, plus the smaller jobs that fill a working day: garbage disposals, sump pumps, hose bibs and outdoor lines, leak detection and diagnostics. The website's own summing up is blunt about the scope, saying that if water runs through it, they will take it on. Commercial and residential are both named, which for a company this size usually means small commercial, restaurants, offices, rental buildings, rather than large-scale mechanical contracting.

Backflow is worth pausing on because it is the thing McDermott Plumbing puts in its own page titles. Anything in Columbus with an irrigation system, a fire line, a boiler feed or certain commercial fixtures needs a testable backflow preventer, and the city requires those devices to be tested annually by a certified tester with the results filed. Plenty of general plumbers will not touch that paperwork. A company that lists backflow as a core service is a reasonable first call for a homeowner who has just had a letter about an irrigation assembly, or a property manager juggling several buildings on the same annual cycle.

The East 18th Avenue address puts the base in the University District, walking distance from the older housing stock in Weinland Park and the doubles and converted student rentals that ring campus. That part of the city is full of pre-war homes with galvanised supply lines going brittle, cast iron drains carrying decades of accumulated grease, and clay laterals under mature street trees. Suburban work in Dublin, Worthington, Bexley and Upper Arlington, all places named in the testimonials posted on the site, brings a different set of problems: failing pressure-reducing valves, 40-gallon heaters at the end of their life, sump systems that cannot keep up with a heavy spring on the clay soils common in Franklin County. A plumber who works across both worlds sees the whole range.

Pricing is presented as flat rate, with a total quoted before any work starts rather than an hourly clock. That is a claim from the company rather than something we can verify, and it is worth asking how the number is arrived at, whether a diagnostic or trip fee applies, and whether it is credited against the job if you go ahead. Ask too what the quote includes on a water heater: permit, disposal of the old unit, expansion tank, any code upgrades to venting or the T and P discharge line. Columbus requires permits and inspection on water heater replacements and on gas and water service work, and a licensed contractor should be pulling those. Ohio licence number 47245 is published on the site, which is easy enough to check against the state board.

Hours are the main practical limitation. Monday to Friday, 7 AM to 5 PM, with Saturday and Sunday shown as closed. Nothing in the profile suggests a 24-hour emergency line, so a burst supply line on a Sunday morning is probably a call to one of the larger Columbus outfits that staff overnight rotations at premium rates. If your job can wait until a weekday, that trade-off often works in your favour, because small shops without a dispatch centre tend to charge less for the same hour of labour.

The review picture is modest in size. A 4.2 rating from 18 reviews on the Google Business Profile, read on September 4, 2026, is a thin sample by the standards of high-volume competitors carrying hundreds of ratings, and it means a couple of poor experiences move the number noticeably. Read the individual reviews rather than the average. The testimonials on the company site, which are self-selected, lean heavily on the owner turning up personally, calling ahead and explaining the work, including one about a jammed garbage disposal that was freed in ten minutes rather than replaced.

As a shortlist entry, McDermott Plumbing suits people who want a named tradesman rather than a rotating crew, who value a fixed price agreed in advance, and who need backflow certification handled alongside ordinary plumbing. It suits large commercial projects and middle-of-the-night emergencies less well. Get the quote in writing, confirm the permit, and ask what warranty covers both parts and labour.

About This Business Profile

Last reviewed

September 2026

Profile last updated

September 17, 2026

Google review data updated

September 4, 2026

Reviewed by

Dana Whitfield, Senior editor, home services

Sources checked

Issuing authorities, Google Business Profile, Company website

Sponsorship status

No commercial relationship