Plumbing Local-SEO Report
Inland Empire 2026

Between May 12 and May 13, 2026, we ran 5×5 geographic grid scans across 5 Inland Empire cities using Local Falcon. Each scan: 2-mile radius centered on the city’s downtown reference point, single keyword plumber [city], with the city name swapped in. Total measurement points: 125.

Every number in this report traces to a specific Local Falcon report key, and the full list of keys is in § 12. The keys are permanent. The named plumbing GBPs — Anthony’s Plumbing, Ballard Plumbing Heating & AC, OneStop Plumbers, Advanced Gen Plumbing, All Pro Plumbing, Pride Plumbing, Lasting Legacy Plumbing, and others — are public competitive data observable via Google Maps and Local Falcon’s standard grid scan. They are not clients of SoftwareStrategists.

What this report measures

• Unique competitor count — total distinct plumbing GBPs eligible for any grid point.
• Active in-pack competitors — the subset that ranked anywhere in the 3-pack.
• Pack leader name, SoLV, and review count — pulled at scan time.
• Top-3 review median — the operator’s cost-of-entry metric.

What this report does not measure

• Single-snapshot data. Pack composition on May 12–13, 2026.
• Single-keyword query. No emergency plumber, water heater repair, or drain cleaning variants.
• 2-mile radius. Larger metros like Riverside would benefit from a wider radius.
• Maps results only. No organic, no SEM.
• Residential intent. Plumber [city] is heavily residential.
• Seasonality unmeasured. October–February water-heater spike is not in this dataset.

Each dot is one Inland Empire city’s plumbing pack leader. The X-axis is the leader’s Google review count, on a linear scale that runs from 0 to 2,500. The Y-axis is the leader’s share of local voice. The Ontario anomaly — Advanced Gen Plumbing at 71 reviews, 72% SoLV — sits to the far left in a way that no other city does.

The takeaway in one sentence: four of five Inland Empire plumbing pack leaders sit above 80% SoLV and above 600 reviews — this is a defended trade. The fifth (Advanced Gen Plumbing in Ontario) sits at 71 reviews and 72% SoLV, and the only reason it wins the pack is that grid-center proximity is doing the work review depth normally would.

Every row below is one Local Falcon scan. City links go to our market-specific local-SEO pages.

Scan key: 5b6bbd9d742e7dd. 5×5 grid, 2-mile radius from Ontario, keyword plumber ontario. The pack:

All Pro Plumbing has 8,080 Google reviews. Roto-Rooter is the national brand with 1,409. Both sit behind a 71-review independent operator. This is not a scan glitch. We re-pulled the heatmap to verify; the report key resolves to the same composition.

Three possible explanations

1. Grid proximity dominates. Advanced Gen sits geometrically closer to the center of the 25-point scan grid than either of the higher-reviewed competitors. A 71-review GBP in the geometric middle of the grid beats an 8,080-review GBP positioned 5 miles off-center, because Google’s local pack weights distance from the searcher heavily, and the scan center represents the “average searcher position” in Ontario.
2. GBP signal quality, not raw review count. Advanced Gen may have cleaner category alignment, tighter NAP, better recent-review velocity, or fresher GBP posts. We did not instrument these signals in this scan, but every one of them is observable in the public GBP and would compound to produce this exact ranking pattern. A 71-review GBP refreshed weekly outranks an 8,080-review GBP that hasn’t posted since 2023.
3. Pack saturation effect. Once a competitor crosses roughly 500 reviews, the marginal review count stops contributing meaningfully to the pack-ranking calculus. Google’s prominence signal does not increase linearly with review count past about that threshold — 1,000 reviews and 8,000 reviews look nearly identical to the algorithm.

What this means for any IE plumber

You do not need to outrun an 8,080-review competitor to win the pack. You need to:

• Be physically inside the service-area grid the searcher is in (downtown address, not a 10-mile-out warehouse).
• Run continuous review velocity (10–20 per month sustained) so the recency signal stays fresh — not a 5-year-old base of 500 reviews that hasn’t grown.
• Keep the GBP signal clean: a single primary Plumber category, NAP parity, weekly posts, photo uploads off every job.

The compounded thesis

Pack-bar median ranges from 150 reviews (Fontana) to 1,409 reviews (Ontario, San Bernardino) across the same 5 cities, same week, same grid geometry. That is a 10× spread in a single trade vertical across an area that fits inside a 90-mile radius. This is a fragmented market, not a uniformly defended one — and the fragmentation is the operator’s leverage. Pick the right city, match the local pack-bar median, and the math works.

Two of the five cities have fewer than 7 active plumbing GBPs in their entire 25-point grid. The two thin packs are at opposite ends of the review-bar spectrum — one of the most useful contrasts in the dataset.

Fontana — 5 active out of 35 unique

Scan key: 5614473fe09ba28. Anthony’s Plumbing holds 100% SoLV with 657 reviews. The full active pack:

Pack-bar median: 150 reviews. A new entrant with 150–200 reviews and a downtown Fontana-centered GBP can credibly challenge the #2 and #3 positions, and clearing 300 reviews on a clean GBP would put pressure on Anthony’s #1 position directly. The pack is small. The entry cost is low. Five operators do not make a defended market.

San Bernardino — 6 active out of 36 unique

Scan key: 2260a6328d15c3c. Ballard Plumbing, Heating & AC holds 96% SoLV with 2,418 reviews — the deepest review base in any IE pack we scanned in 2026 in any trade.

Pack-bar median: 1,407 reviews. Breaking into this top-3 requires matching the review curve. An entrant with 500 reviews would not credibly contest these three GBPs; an entrant with 1,000 reviews might displace Payless 4 Plumbing at #3 if the GBP signal quality was clean. Below 1,000 reviews, San Bernardino is not a plumbing market worth entering on a 12-month horizon.

Reading the pattern

• Thin active pack + low review-bar median = open. Fontana: 5 active operators, pack-bar median 150. Entry cost roughly 150 reviews.
• Thin active pack + high review-bar median = defended. San Bernardino: 6 active operators, pack-bar median 1,407. Entry cost above 1,000 reviews.

The two cities are 25 miles apart. The trade is the same. The keyword is the same. The grid geometry is identical. The pack composition is unrecognizable. This is what we mean when we call the IE plumbing market “fragmented”: it is not one market with consistent dynamics. It is five different markets that happen to share a regional name.

The Ontario paradox is not the only place in the dataset where an operator with a deep review base ranks below an operator with a thinner one. Redlands shows the same pattern in miniature.

Redlands’ pack:

Lasting Legacy Plumbing has the deepest review base in the Redlands plumbing pack — 1,581 Google reviews. It still ranks #3 behind an 894-review competitor at #1 and a 917-review competitor at #2. Same Ontario pattern in a smaller magnitude: beyond about 500–800 reviews, the marginal review depth stops moving the ranking, and proximity-plus-signal-quality does the work instead.

For an established Redlands plumber, the lesson is direct: if you are already past 500 reviews, more reviews are not the lever. Audit the GBP for category cleanliness, NAP parity, post cadence, and photo recency — those are the levers that differentiate the three GBPs holding 70–90% SoLV in the Redlands pack right now.

Five operator-facing characteristics of the IE plumbing market explain the shape of this dataset. Understanding all five is the difference between a marketing plan that compounds and a plan that burns ad spend.

Emergency-call dominance

Plumbing is the most “emergency” of any IE trade we scanned. The pack winners — Anthony’s at 100% in Fontana, Ballard at 96% in San Bernardino, Redlands & Henry Bush at 88% in Redlands — all run 24/7 dispatch. Customers searching plumber [city] at 11pm on a Tuesday with a flooded laundry room are not comparison shopping; they are calling the first 3-pack result that answers the phone. The implication: review counts in this trade are inflated by “they came at midnight, fixed it, 5 stars” reviews, which leave at materially higher rates than scheduled-service reviews. An operator who does not run real after-hours capability cannot match the review velocity of operators who do.

The multi-trade chain pattern

Three of the five top-1 plumbing GBPs in our dataset are multi-trade chains operating across Plumbing, HVAC, and Electrical/AC simultaneously:

• Redlands #1: Redlands & Henry Bush Plumbing, Heating & AC (894 reviews aggregated across all three trades, not just plumbing).
• San Bernardino #1: Ballard Plumbing, Heating & AC (2,418 reviews across three trades).
• Lasting Legacy Plumbing in Redlands at #3 (1,581 reviews) operates plumbing-plus-water-treatment lines.

A pure-play plumber competing against a multi-trade chain has roughly three times less review-generation surface area per address served. The chain’s HVAC service call collects a review that helps the plumbing keyword’s ranking; the pure-play plumber gets one review per plumbing job. Over five years this compounds into the moats we see in Redlands and San Bernardino. Operators considering an IE plumbing entry should price this asymmetry into the plan — either by broadening trade scope or by accepting that the ramp will be longer in cities where multi-trade chains already dominate.

Water-heater seasonality (October–February)

IE plumbing search volume peaks on water-heater terms between October and February. Single-snapshot methodology like this report’s does NOT capture seasonal pack rotation. A scan run in November on water heater repair [city] would show a different competitive landscape — operators running seasonal Google Ads campaigns on water-heater keywords spike their relevance signal during the peak season and sometimes hold improved organic Maps positions through Q1. Treat the May snapshot in this report as the off-season baseline; the November pack composition is plausibly tighter.

Commercial vs. residential split

The pack we measured is heavily residential because plumber [city] is residential-intent. Commercial plumbing in the IE flows through different keywords (commercial plumbing contractor, backflow testing, commercial plumbing repair) and different competitive landscapes. Operators positioning for commercial work should treat this report as residential-only and pull a separate scan on the commercial keyword set before making market-entry decisions.

The Lasting Legacy outlier confirms the Ontario thesis

We covered this in § 06: Lasting Legacy Plumbing’s 1,581-review base ranks third in Redlands behind two less-reviewed competitors. Combined with the Ontario paradox (All Pro Plumbing’s 8,080 reviews at #3), the pattern is consistent across two of the five cities: past about 500 reviews, the marginal review count is not the differentiator. The differentiator is proximity to the searcher and the freshness of the GBP signal. This holds in both directions — it explains why the 71-review operator wins in Ontario, and it explains why the 1,581-review operator loses in Redlands.

Our flagship Inland Empire Local SEO Report 2026 measured 20 IE cities for the agency vertical. The plumbing pack is the inverse shape: deep on review depth, narrow on active competitor count. The contrast is the most useful single comparison across the two reports.

Two reports, same five-mile grids in many of the same cities, completely different competitive landscapes depending on which keyword you scan. The most useful single takeaway across both: review depth and GBP signal quality are two different levers, and the right balance between them depends entirely on what the rest of your category looks like.

For the full 20-city dataset on agency competition, see the flagship: Read the full 20-city Inland Empire Local SEO Report 2026 →

SoLV definition

Share of local voice is the percentage of grid points (out of the 25 in each scan) where a given GBP appears in the local-pack ranking, weighted by position. A GBP at position #1 across all 25 grid points scores 100% SoLV.

Why plumber [city]?

Consistency across cities. Plumber [city] is the highest-intent residential plumbing query and produces a pack composed of plumbing contractors in every IE city we tested. Variants like emergency plumber, water heater repair, or drain cleaning would produce richer datasets but at four times the scan cost.

Snapshot date is load-bearing

Every number in this report reflects pack composition on May 12–13, 2026. We refresh annually each May on this URL with the same methodology. Citations referencing specific operators (Anthony’s Plumbing, Ballard P,H&AC, OneStop Plumbers, Advanced Gen Plumbing, Pride Plumbing, Lasting Legacy Plumbing, Redlands & Henry Bush, All Pro Plumbing, Roto-Rooter, Mr. Rooter Plumbing of SB, Payless 4 Plumbing, A O Dowd Plumbing, Bobby Blue Plumbing) should be qualified as “as of May 2026” in any republished work.

Honesty

The named GBPs in this report are public competitive data observable via Google Maps and Local Falcon’s standard grid scan. They are not clients of SoftwareStrategists. We have not been engaged to produce SEO work, GBP work, citation work, or marketing work for any of the operators named above.

Raw data and verification

Every scan’s Local Falcon report key is listed in § 12. Email contact@softwarestrategists.com to request the original Local Falcon PDF for any city.

SoftwareStrategists is a Redlands, CA–based local-SEO and websites studio for Inland Empire service businesses. We do Google Business Profile work, schema-marked websites, citation management, and review cadence for plumbers, HVAC contractors, roofers, electricians, window cleaners, and other trades. Our home page and services page cover the operating details — pricing is published, engagements are month-to-month.

We built and published this report because we run geo-grid scans every week for client engagements, and the data has obvious public interest. The Inland Empire plumbing category had no published local-pack competitive landscape research that we could find. So we published one. Refresh annually each May, on this URL, same methodology.

If you operate a plumbing business in any of the 5 cities covered above and want a one-off free geo-grid scan for your own GBP — email or call, name the city and the keyword you want scanned, and we will run it and send the heatmap. Link is on the contact page.

All scans run May 12–13, 2026, 5×5 grid, 2-mile radius, keyword plumber [city]. Email contact@softwarestrategists.com to request the original Local Falcon PDF for any scan.