63/100CR Score
Ranked #1 because of its Google rating and review volume: 4.9★ from 507 Google reviews, the most in Janesville.
Based on 8 of 10 factors; credentials and recency not yet collected.
Best Pool Builders in Janesville, WI (2026)
41 pool builders ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Janesville: Wolter Pools & Spas, CR Score 63/100; 4.9★ from 507 Google reviews; open Saturdays until 3 PM.
- 20
Best for emergencies (open 24/7): Gator's Pool Service LLC, posts 24/7 hours; ranked #20 of 41.
- 3
Most-reviewed: Bachmann Pools, Spas & Saunas, 285 Google reviews at 4.7★, the most of 41 ranked after Wolter Pools & Spas; ranked #3.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
41 Janesville pool builders are ranked here by CR Score, from ten published factors. 1 is open 24/7, 23 open Saturdays and 5 open Sundays, based on posted hours. The median Google rating is 4.7★ across 41 rated businesses.
Top 10 pool builders in Janesville at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Wolter Pools & Spas | 63 | 4.9★ (507) | Beloit, 9 mi away | Sat | Overall |
| 2 | Nelson's HomeTowne Recreation | 61 | 4.2★ (220) | Janesville | Sat · Sun | — |
| 3 | Bachmann Pools, Spas & Saunas | 59 | 4.7★ (285) | Madison, 30 mi away | Sat · Sun | Most reviews |
| 4 | Oasis Pool Water | 57 | 5.0★ (18) | South Beloit, 14 mi away | Sat · Sun · Evenings | — |
| 5 | Sonco Pools & Spas | 57 | 4.7★ (131) | Machesney Park, 24 mi away | Sat | — |
| 6 | Patio Pleasures Pools & Spas | 56 | 4.8★ (181) | Madison, 35 mi away | Sat | — |
| 7 | Rockford Pool & Spa | 56 | 4.6★ (126) | Loves Park, 24 mi away | Sat | — |
| 8 | Patio Pleasures Pools & Spas | 56 | 4.8★ (183) | Sun Prairie, 36 mi away | Sat | — |
| 9 | Waterman Inc | 55 | 4.8★ (102) | Oconomowoc, 38 mi away | Sat | — |
| 10 | Bob's Pool Builders Inc. | 55 | 5.0★ (41) | Oconomowoc, 32 mi away | — | — |
The 41 best pool builders in Janesville, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Based in Janesville
61/100CR ScoreRanked #2 because of its Google rating and trade focus: 4.2★ from 220 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Madison, 30 mi away
59/100CR ScoreRanked #3 because of its Google rating and trade focus: 4.7★ from 285 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in South Beloit, 14 mi away
57/100CR ScoreRanked #4 because of its Google rating and trade focus: 5.0★ from 18 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Machesney Park, 24 mi away
57/100CR ScoreRanked #5 because of its Google rating and trade focus: 4.7★ from 131 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Madison, 35 mi away
56/100CR ScoreRanked #6 because of its Google rating and trade focus: 4.8★ from 181 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Loves Park, 24 mi away
56/100CR ScoreRanked #7 because of its Google rating and trade focus: 4.6★ from 126 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sun Prairie, 36 mi away
56/100CR ScoreRanked #8 because of its Google rating and trade focus: 4.8★ from 183 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#9 Waterman Inc
Based in Oconomowoc, 38 mi away
55/100CR ScoreRanked #9 because of its Google rating and trade focus: 4.8★ from 102 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Oconomowoc, 32 mi away
55/100CR ScoreRanked #10 because of its Google rating and trade focus: 5.0★ from 41 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Oregon, 24 mi away
54/100CR ScoreRanked #11 because of its Google rating and trade focus: 4.0★ from 137 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#12 Hot Tub Tony'z
Based in Loves Park, 25 mi away
54/100CR ScoreRanked #12 because of its Google rating and trade focus: 4.1★ from 106 Google reviews, listed on Google as “Swimming pool repair service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Oconomowoc, 38 mi away
54/100CR ScoreRanked #13 because of its Google rating and trade focus: 4.9★ from 113 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Rockford, 31 mi away
54/100CR ScoreRanked #14 because of its Google rating and trade focus: 4.9★ from 29 Google reviews, listed on Google as “Swimming pool repair service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
#15 The Spa Shop
Based in Belvidere, 32 mi away
53/100CR ScoreRanked #15 because of its Google rating and trade focus: 4.9★ from 73 Google reviews, listed on Google as “Swimming pool repair service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#16 New Wave Pools,
Based in Sun Prairie, 34 mi away
53/100CR ScoreRanked #16 because of its Google rating and trade focus: 4.1★ from 39 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Janesville
52/100CR ScoreRanked #17 because of its Google rating and trade focus: 4.5★ from 6 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Roscoe, 18 mi away
52/100CR ScoreRanked #18 because of its Google rating and trade focus: 4.2★ from 20 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#19 Poolside Pros
Based in Loves Park, 25 mi away
52/100CR ScoreRanked #19 because of its Google rating and trade focus: 4.0★ from 85 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Machesney Park, 24 mi away
52/100CR ScoreRanked #20 because of its Google rating and trade focus: 3.2★ from 10 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Waukesha, 38 mi away
52/100CR ScoreRanked #21 because of its Google rating and trade focus: 4.4★ from 65 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Madison, 33 mi away
51/100CR ScoreRanked #22 because of its Google rating and trade focus: 5.0★ from 14 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Janesville
51/100CR ScoreRanked #23 because of its Google rating and review volume: 4.9★ from 40 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Rockford, 31 mi away
51/100CR ScoreRanked #24 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “Swimming pool contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Cottage Grove, 17 mi away
50/100CR ScoreRanked #25 because of its Google rating and review volume: 4.9★ from 108 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
All 41 pool builders
#1 to #25 are shown in full above. Here are #26 to #41, in CR Score order; each links to its profile.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | Pool Boy Fiberglass Pools | 50 | 3.3★ (3) | 15 mi |
| 27 | Elite Pools and Spas | 50 | 4.0★ (56) | 37 mi |
| 28 | Stateline Pool & Spa | 50 | 5.0★ (10) | 37 mi |
| 29 | Pooltopia and Spas | 50 | 5.0★ (8) | 22 mi |
| 30 | Crystal Clear Pool Service, inc | 50 | 5.0★ (7) | 30 mi |
| 31 | Water Works Pool & Spa Service | 49 | 4.4★ (27) | 34 mi |
| 32 | Farwell Pools & Spas | 49 | 3.9★ (27) | 28 mi |
| 33 | Lake Geneva Pool And Spa | 49 | 4.4★ (29) | 38 mi |
| 34 | Malibu Pools | 48 | 4.3★ (12) | 39 mi |
| 35 | Sunrise Pool Builders, Inc. | 47 | 3.0★ (10) | 31 mi |
| 36 | Nierman Landscape & Design | 47 | 5.0★ (33) | 36 mi |
| 37 | Capitol Pools, LLC | 47 | 4.3★ (6) | 35 mi |
| 38 | ISR of Madison, LLC | 45 | 5.0★ (4) | 38 mi |
| 39 | Olson Toon Landscaping Inc. | 43 | 4.0★ (101) | 38 mi |
| 40 | Crimson Valley Landscaping | 43 | 3.8★ (21) | 29 mi |
| 41 | Pinnacle Masonry | 40 | 5.0★ (4) | 36 mi |
Also serving Janesville
13 more pool builders within 40 mi that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.
| Business | Google rating | Distance |
|---|---|---|
| All Service Specialists | 30 mi | |
| Aquapoolscapes Inc. | 39 mi | |
| Avatar Pools & Spa Inc | 30 mi | |
| Classic Pools, Inc. | 38 mi | |
| Clearview Pools Inc. | 5.0★ (2) | 14 mi |
| Horizon Pool Services | 5.0★ (1) | 37 mi |
| LuxeCare | 1.5★ (2) | 24 mi |
| Madison Pool Services LLC | 24 mi | |
| Midwest Pool UV Systems Inc | 38 mi | |
| Pools and Liners Plus | 22 mi | |
| Quality Pool & Spa Service LLC | 3.0★ (2) | 19 mi |
| Roenneburg Pool Services | In Janesville | |
| Schills Construction | 5.0★ (2) | 40 mi |
How we ranked Janesville pool builders
We scored 41 Janesville pool builders on ten 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. A business with no Google reviews scores zero on rating, review volume and recency. Other unknown factors are left out, not counted as zero. Scores last refreshed November 3, 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 Janesville data |
|---|---|---|---|
| Reputation | 25% | Google star rating, adjusted for how many reviews back it | Measured |
| Credentials | 15% | Active state license, bond and workers’ comp on file | Not yet collected |
| Review volume | 10% | Number of Google reviews, compared with the most-reviewed business on the list | Measured |
| Recency | 5% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 5% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | How clearly the business does this trade (its Google category and name) | Measured |
| Proximity | 5% | Based in the city scores highest, less the farther away it is | Measured |
| Claimed profile | 10% | The business has claimed its ContractorsRanked profile (free or paid earn the same) | Measured |
| Partnered | 5% | The business links to ContractorsRanked from its own website with our badge, checked periodically | Measured |
| ContractorsRanked reviews | 10% | Verified customer reviews collected by ContractorsRanked: their rating and how many there are | Measured |
Pool builders in Janesville: frequently asked questions
Who is the best pool builder in Janesville?
By CR Score, the highest-ranked pool builder in Janesville, WI is Wolter Pools & Spas with a CR Score of 63/100. It has 4.9★ from 507 Google reviews. It is open Saturdays until 3 PM. Nelson's HomeTowne Recreation (#2) and Bachmann Pools, Spas & Saunas (#3) follow. We ranked 41 pool builders on ten factors, last updated November 3, 2026.
How many pool builders are there in Janesville?
ContractorsRanked ranks 41 pool builders serving Janesville, WI. 3 of them are based in Janesville; the rest serve it from nearby towns. Another 13 within 40 mi are listed but not ranked yet. Counts are as of November 2026.
Which pool builders in Janesville are open 24/7?
1 ranked pool builder in Janesville posts 24/7 hours. The highest-ranked is Gator's Pool Service LLC (#20). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which pool builders in Janesville work on weekends?
23 of 41 ranked pool builders post Saturday hours and 5 post Sunday hours. The highest-ranked open Saturdays are Wolter Pools & Spas (#1), Nelson's HomeTowne Recreation (#2) and Bachmann Pools, Spas & Saunas (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Janesville pool builders have?
The median Google rating among 41 rated pool builders in Janesville is 4.7★, with a median of 33 reviews. Wolter Pools & Spas has the most, 507 reviews, and ranks #1. We adjust ratings for review count, so a few five-star reviews cannot top the list.
How does ContractorsRanked rank pool builders?
Each pool builder gets a 0–100 CR Score from ten published factors, led by reputation (25%), credentials (15%), review volume (10%) and trade focus (10%). A business with no Google reviews scores zero on rating, review volume and recency; other factors we cannot measure are left out. Only businesses with a confirmed trade and 3 or more reviews, or a claimed profile, are ranked.
Do pool builders outside Janesville count in this ranking?
Yes, if they are within 40 mi of the Janesville city center, our service radius for pool builders. Each listing shows where the business is based and how far away it is. Proximity is 5% of the CR Score, so a nearby business gets a small edge.
Can pool builders pay to rank higher on ContractorsRanked?
No. The CR Score never reads payment status, and this ranking has 0 paid placements. Up to 3 Featured businesses may appear above the list, labelled Featured and showing their honest rank.
Update log for Janesville
- November 2026: CR Scores recalculated for 41 pool builders serving Janesville.
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