8 plumbers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Shenandoah: John Gowing Plumbing & Heating, CR Score 81/100; 4.7★ from 18 Google reviews.
Most-reviewed: Wallin Plumbing & Heating, 32 Google reviews at 4.3★, the most of 8 ranked; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
8 Shenandoah plumbers are ranked here by CR Score, from 8 published factors. The median Google rating is 4.6★ across 8 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | John Gowing Plumbing & Heating | 81 | 4.7★ (18) | Shenandoah | — | Overall |
| 2 | Wallin Plumbing & Heating | 76 | 4.3★ (32) | Shenandoah | — | Most reviews |
| 3 | Rogers Plumbing Heating & AC | 73 | 3.5★ (27) | Red Oak, 18 mi away | — | — |
| 4 | Wallin Plumbing & Heating | 71 | 4.5★ (22) | Clarinda, 18 mi away | — | — |
| 5 | R & R Plumbing Heating & Air Conditioning | 70 | 3.5★ (18) | Red Oak, 19 mi away | — | — |
| 6 | Don's Johns & Septic Pumping | 68 | 5.0★ (8) | Shenandoah | — | — |
| 7 | Beery Construction-Excavating Contractor | 66 | 5.0★ (9) | Clarinda, 20 mi away | Evenings | — |
| 8 | Southwest Iowa Plumbing & Heating | 65 | 5.0★ (4) | Clarinda, 18 mi away | — | — |
Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.
Ranked #1 because of its Google rating and review volume: 4.7★ from 18 Google reviews, 18 Google reviews.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Shenandoah
Ranked #2 because of its Google rating and review volume: 4.3★ from 32 Google reviews, the most Google reviews on this list (32).
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Red Oak, 18 mi away
Ranked #3 because of its Google rating and review volume: 3.5★ from 27 Google reviews, 27 Google reviews.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Clarinda, 18 mi away
Ranked #4 because of its Google rating and review volume: 4.5★ from 22 Google reviews, 22 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Red Oak, 19 mi away
Ranked #5 because of its Google rating and trade focus: 3.5★ from 18 Google reviews, listed on Google as “Plumber”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Shenandoah
Ranked #6 because of its Google rating and review volume: 5.0★ from 8 Google reviews, 8 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Clarinda, 20 mi away
Ranked #7 because of its Google rating and review volume: 5.0★ from 9 Google reviews, 9 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Clarinda, 18 mi away
Ranked #8 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “HVAC contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
National price ranges in USD, not adjusted for Shenandoah. Each row names its basis and the month we checked it.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Water heater replacement | $882 | $1,348 | $1,826 | Per unit, installed (unit plus labor); typical range of customer-reported jobs. US national range | October 2026 |
In Iowa, Iowa Plumbing and Mechanical Systems Board (Department of Inspections, Appeals and Licensing) licenses Plumbing work: water supply, drain, waste and vent piping and fixtures.
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
We scored 8 Shenandoah 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.
| Factor | Weight | Computed from | In Shenandoah data |
|---|---|---|---|
| Reputation | 35% | Bayesian-adjusted Google star rating | Measured |
| Credentials | 15% | Active state license 0.6, bond 0.2, workers’ comp 0.2 | Not yet collected |
| Review volume | 10% | log10(reviews + 1) against the list maximum | Measured |
| Recency | 10% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 10% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | Google main category 1.0, business name 0.7, additional category 0.5 | Measured |
| Proximity | 5% | 1.0 when based in the city, falling to 0 at the trade’s radius | Measured |
| Completeness | 5% | Website, photos, description, hours, claimed profile (0.2 each) | Measured |