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ContractorsRanked

Best Plumbers in Defiance, OH (2026)

21 plumbers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →

The short answer

  1. 1

    Best overall in Defiance: BLUSHARK PLUMBING SERVICES, CR Score 91/100; 5.0★ from 66 Google reviews; open 24/7.

  2. 2

    Best for emergencies (open 24/7): Affordable Water Heaters, posts 24/7 hours; ranked #2 of 21.

  3. 3

    Most-reviewed: Ascend Mechanical/JMS Services, 340 Google reviews at 4.7★, the most of 21 ranked; ranked #3.

Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank

21 Defiance plumbers are ranked here by CR Score, from 8 published factors. 6 are open 24/7, 9 open Saturdays and 6 open Sundays, based on posted hours. The median Google rating is 4.5★ across 21 rated businesses.

Top 10 plumbers in Defiance at a glance

Top 10 plumbers in Defiance at a glance
RankBusinessCR ScoreGoogle ratingBased inHoursBest for
1BLUSHARK PLUMBING SERVICES915.0★ (66)Fox Lake, 6 mi away24/7Overall
2Affordable Water Heaters864.9★ (63)Farmington Hills, 22 mi away24/7Emergencies
3Ascend Mechanical/JMS Services834.7★ (340)Bryan, 17 mi away24/7Most reviews
4Mast Plumbing Co834.7★ (20)Defiance——
5Rsm Services835.0★ (99)Bryan, 16 mi away24/7—
6RSM Services835.0★ (181)Wauseon, 23 mi away24/7—
7Holbrook Plumbing & Drain Cleaning804.7★ (63)Defiance——
8Scott Wagner Plumbing & Heating784.8★ (146)Defiance——
9Moore Plumbing764.5★ (8)Napoleon, 14 mi away——
10Greenler Plumbing & Heating LLC755.0★ (6)Bryan, 19 mi away24/7—

The 21 best plumbers in Defiance, ranked

Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.

  4. #4 Mast Plumbing Co

    Based in Defiance

    83/100CR Score

    Ranked #4 because of its Google rating and trade focus: 4.7★ from 20 Google reviews, listed on Google as “Plumber”.

    Based on 5 of 8 factors; credentials, recency and availability not yet collected.

    • 4.7★ from 20 Google reviews
    Address
    416 E 2nd St, Defiance, OH 43512
    View profile for Mast Plumbing Co(419) 782-5416

  5. #5 Rsm Services

    Based in Bryan, 16 mi away

    83/100CR Score

    Ranked #5 because of its Google rating and availability: 5.0★ from 99 Google reviews, open 24/7.

    Based on 6 of 8 factors; credentials and recency not yet collected.

    • 5.0★ from 99 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1612 E High St, Bryan, OH 43506
    View profile for Rsm Services(419) 630-8774

  6. #6 RSM Services

    Based in Wauseon, 23 mi away

    83/100CR Score

    Ranked #6 because of its Google rating and availability: 5.0★ from 181 Google reviews, open 24/7.

    Based on 6 of 8 factors; credentials and recency not yet collected.

    • 5.0★ from 181 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1290 N Shoop Ave Suite 6, Wauseon, OH 43567
    View profile for RSM Services(419) 330-4422

  9. #9 Moore Plumbing

    Based in Napoleon, 14 mi away

    76/100CR Score

    Ranked #9 because of its Google rating and trade focus: 4.5★ from 8 Google reviews, listed on Google as “Plumber”.

    Based on 5 of 8 factors; credentials, recency and availability not yet collected.

    • 4.5★ from 8 Google reviews
    Address
    709 Appian Ave, Napoleon, OH 43545
    View profile for Moore Plumbing(419) 599-1993

  14. #14 Y2K Plumbing

    Based in Defiance

    73/100CR Score

    Ranked #14 because of its Google rating and trade focus: 3.2★ from 10 Google reviews, listed on Google as “Construction company”.

    Based on 6 of 8 factors; credentials and recency not yet collected.

    • 3.2★ from 10 Google reviews
    Hours
    Mon–Fri 8 AM–5 PM · Sat 9 AM–12 PM · Sun closed
    Address
    1128 Schultz St, Defiance, OH 43512
    View profile for Y2K Plumbing(419) 576-0475

  18. #18 RAK Plumbing and HVAC

    Based in Napoleon, 14 mi away

    70/100CR Score

    Ranked #18 because of its Google rating and trade focus: 3.7★ from 7 Google reviews, listed on Google as “HVAC contractor”.

    Based on 6 of 8 factors; credentials and recency not yet collected.

    • 3.7★ from 7 Google reviews
    Hours
    Mon–Fri 7 AM–5 PM · Sat 8 AM–12 PM · Sun closed
    Address
    211 Yeager St, Napoleon, OH 43545
    View profile for RAK Plumbing and HVAC(419) 351-3240

Also serving Defiance

10 more plumbers within 25 mi that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.

Unranked plumbers serving Defiance
BusinessGoogle ratingDistance
Bergstedt Building LLC24 mi
Fitzenrider4.2★ (30)In Defiance
Fraas Heat AC & Plumbing5.0★ (1)In Defiance
Green's Handyman Services LLC5.0★ (1)In Defiance
Kime Plumbing & Heating5.0★ (1)In Defiance
Napoleon Excavating Llc.14 mi
Poynter Plumbing & Heating3.0★ (1)17 mi
Standard Plumbing & Heating14 mi
Starks Incopr5.0★ (1)In Defiance
Y2K General Contracting1.0★ (1)In Defiance

How much do plumbers cost in Defiance?

National price ranges in USD, not adjusted for Defiance. Each row names its basis and the month we checked it.

How much do plumbers cost in Defiance?
JobLowTypicalHighBasisChecked
Water heater replacement$882$1,348$1,826Per unit, installed (unit plus labor); typical range of customer-reported jobs. US national rangeOctober 2026

How to check a plumber's license in Ohio

In Ohio, Ohio Construction Industry Licensing Board licenses Commercial plumbing contractor licenses.

  1. Search the business name or license number on the Ohio Construction Industry Licensing Board license lookup.
  2. Check that the status is active and the name matches the contract or truck.
  3. Ask for proof of insurance before work starts.

No chip usually means we have not matched a state record yet. Check the lookup yourself before you hire.

Guide checked October 2026. How we verify licenses

How we ranked Defiance plumbers

We scored 21 Defiance plumbers on 8 factors, weighted as shown. A business is ranked when its trade is confirmed and it has 3 or more Google reviews or a claimed profile. Unknown factors are left out of the score, not counted as zero. Scores last refreshed October 22, 2026.

Paid placement never changes a rank or score. Featured businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.

Read the full method: formula, sources and exclusions

CR Score factors and weights
FactorWeightComputed fromIn Defiance data
Reputation35%Bayesian-adjusted Google star ratingMeasured
Credentials15%Active state license 0.6, bond 0.2, workers’ comp 0.2Not yet collected
Review volume10%log10(reviews + 1) against the list maximumMeasured
Recency10%Share of reviews from the last 12 monthsNot yet collected
Availability10%Weekly open hours, Saturday, Sunday, 24/7 or same-dayMeasured
Trade focus10%Google main category 1.0, business name 0.7, additional category 0.5Measured
Proximity5%1.0 when based in the city, falling to 0 at the trade’s radiusMeasured
Completeness5%Website, photos, description, hours, claimed profile (0.2 each)Measured

Plumbers in Defiance: frequently asked questions

Who is the best plumber in Defiance?

By CR Score, the highest-ranked plumber in Defiance, OH is BLUSHARK PLUMBING SERVICES with a CR Score of 91/100. It has 5.0★ from 66 Google reviews. It is open 24/7. Affordable Water Heaters (#2) and Ascend Mechanical/JMS Services (#3) follow. We ranked 21 plumbers on 8 factors, last updated October 22, 2026.

How many plumbers are there in Defiance?

ContractorsRanked ranks 21 plumbers serving Defiance, OH. 5 of them are based in Defiance; the rest serve it from nearby towns. Another 10 within 25 mi are listed but not ranked yet. Counts are as of October 2026.

Which plumbers in Defiance are open 24/7?

6 ranked plumbers in Defiance post 24/7 hours. The highest-ranked are BLUSHARK PLUMBING SERVICES (#1), Affordable Water Heaters (#2) and Ascend Mechanical/JMS Services (#3). Hours come from each business's Google listing as of October 2026, so call to confirm.

Which plumbers in Defiance work on weekends?

9 of 21 ranked plumbers post Saturday hours and 6 post Sunday hours. The highest-ranked open Saturdays are BLUSHARK PLUMBING SERVICES (#1), Affordable Water Heaters (#2) and Ascend Mechanical/JMS Services (#3). Posted hours are office hours; crews may book weekend jobs separately.

How do I check a plumber's license in Ohio?

In Ohio, Ohio Construction Industry Licensing Board handles licensing and covers Commercial plumbing contractor licenses. Search the business or license number at https://elicense.ohio.gov/oh_verifylicense.

How much does water heater replacement cost in Defiance?

Water heater replacement typically costs $882 to $1,826, with $1,348 typical (Per unit, installed (unit plus labor); typical range of customer-reported jobs. US national range). This is a national range, not adjusted for Defiance. Prices were last checked October 2026. Get at least two written quotes before you hire.

What Google rating do Defiance plumbers have?

The median Google rating among 21 rated plumbers in Defiance is 4.5★, with a median of 62 reviews. Ascend Mechanical/JMS Services has the most, 340 reviews, and ranks #3. We adjust ratings for review count, so a few five-star reviews cannot top the list.

How does ContractorsRanked rank plumbers?

Each plumber gets a 0–100 CR Score from 8 published factors, led by reputation (35%), credentials (15%), review volume (10%) and recency (10%). Factors we cannot measure are left out, not scored as zero. Only businesses with a confirmed trade and 3 or more reviews, or a claimed profile, are ranked.

Update log for Defiance

  1. October 2026: CR Scores recalculated for 21 plumbers serving Defiance.

More plumbers and Defiance pages