101 electricians ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Groton: Calkins Electric, CR Score 93/100; 4.8★ from 173 Google reviews; open 24/7.
Best for emergencies (open 24/7): Biagiarelli Electric LLC, posts 24/7 hours; ranked #2 of 101.
Most-reviewed: Walter Electric LLC, 329 Google reviews at 4.9★, the most of 101 ranked; ranked #10.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
101 Groton electricians are ranked here by CR Score, from 8 published factors. 18 are open 24/7, 33 open Saturdays and 22 open Sundays, based on posted hours. The median Google rating is 4.9★ across 101 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Calkins Electric | 93 | 4.8★ (173) | Waterford, 3 mi away | 24/7 | Overall |
| 2 | Biagiarelli Electric LLC | 90 | 4.9★ (49) | Madison, 4 mi away | 24/7 | Emergencies |
| 3 | Shoreline Electric Services | 90 | 4.9★ (181) | Guilford, 18 mi away | 24/7 | — |
| 4 | Klein Electric LLC | 90 | 5.0★ (42) | Ledyard, 8 mi away | 24/7 | — |
| 5 | Generators On Demand LLC | 89 | 4.8★ (78) | Old Saybrook, 12 mi away | 24/7 | — |
| 6 | PURE ENERGY LLC | 88 | 4.8★ (23) | Groton | 24/7 | — |
| 7 | Sked Electric, LLC | 86 | 4.9★ (136) | Madison, 18 mi away | — | — |
| 8 | Jamco Electric | 86 | 4.7★ (12) | Madison, 7 mi away | 24/7 | — |
| 9 | Deer Electric LLC | 86 | 5.0★ (9) | Waterford, 8 mi away | 24/7 | — |
| 10 | Walter Electric LLC | 85 | 4.9★ (329) | New London, 1 mi away | — | Most reviews |
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 availability: 4.8★ from 173 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Madison, 4 mi away
Ranked #2 because of its Google rating and availability: 4.9★ from 49 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Guilford, 18 mi away
Ranked #3 because of its Google rating and availability: 4.9★ from 181 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Ledyard, 8 mi away
Ranked #4 because of its Google rating and availability: 5.0★ from 42 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Old Saybrook, 12 mi away
Ranked #5 because of its Google rating and availability: 4.8★ from 78 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Groton
Ranked #6 because of its Google rating and availability: 4.8★ from 23 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Madison, 18 mi away
Ranked #7 because of its Google rating and trade focus: 4.9★ from 136 Google reviews, listed on Google as “Electrician”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Madison, 7 mi away
Ranked #8 because of its Google rating and availability: 4.7★ from 12 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Waterford, 8 mi away
Ranked #9 because of its Google rating and availability: 5.0★ from 9 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in New London, 1 mi away
Ranked #10 because of its Google rating and review volume: 4.9★ from 329 Google reviews, the most Google reviews on this list (329).
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Groton
Ranked #11 because of its Google rating and trade focus: 4.7★ from 11 Google reviews, listed on Google as “Electrical installation service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Ledyard, 7 mi away
Ranked #12 because of its Google rating and availability: 3.9★ from 7 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Conning Towers-Nautilus Park, 1 mi away
Ranked #13 because of its Google rating and trade focus: 5.0★ from 7 Google reviews, listed on Google as “Electrician”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Conning Towers-Nautilus Park, 5 mi away
Ranked #14 because of its Google rating and trade focus: 4.9★ from 11 Google reviews, listed on Google as “Electrician”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Norwich, 14 mi away
Ranked #15 because of its Google rating and trade focus: 4.9★ from 30 Google reviews, listed on Google as “Electrician”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Ledyard, 10 mi away
Ranked #16 because of its Google rating and trade focus: 4.9★ from 31 Google reviews, listed on Google as “Electrician”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Groton
Ranked #17 because of its Google rating and trade focus: 5.0★ from 15 Google reviews, listed on Google as “Electrician”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Groton
Ranked #18 because of its Google rating and trade focus: 5.0★ from 10 Google reviews, listed on Google as “Electrician”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Hopkinton, 15 mi away
Ranked #19 because of its Google rating and availability: 4.0★ from 16 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Groton
Ranked #20 because of its Google rating and trade focus: 4.2★ from 5 Google reviews, listed on Google as “Electrician”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Ledyard, 9 mi away
Ranked #21 because of its Google rating and trade focus: 4.1★ from 17 Google reviews, listed on Google as “Electrician”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Westerly, 14 mi away
Ranked #22 because of its Google rating and trade focus: 5.0★ from 9 Google reviews, listed on Google as “Electrician”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Ledyard, 9 mi away
Ranked #23 because of its Google rating and trade focus: 4.3★ from 10 Google reviews, listed on Google as “Electrical installation service”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Plainfield, 8 mi away
Ranked #24 because of its Google rating and trade focus: 5.0★ from 7 Google reviews, listed on Google as “Electrician”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Ledyard, 20 mi away
Ranked #25 because of its Google rating and availability: 5.0★ from 5 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile. We publish the top 50 of 101 ranked electricians here; the rest are on their profiles.
20 more electricians within 25 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 |
|---|---|---|
| Andersen Electric | 5.0★ (1) | In Groton |
| Atkisson Electric Co | 5.0★ (6) | 22 mi |
| Dan Terry Plumbing LLC | 4.1★ (24) | In Groton |
| E Brian’s Electric | 5.0★ (1) | In Groton |
| Ed's Electric | 2.5★ (2) | 5 mi |
| Goldstar Handyman Services | 5.0★ (1) | In Groton |
| I Gotta Guy | 5.0★ (11) | In Groton |
| J&J Plumbing and Heating LLC | 5.0★ (19) | In Groton |
| JDM Electric | 5.0★ (2) | In Groton |
| Macrino Electric | 3.0★ (2) | 3 mi |
| Marchal Handyman LLC | 4.9★ (14) | In Groton |
| Marino Electric Inc | 2.0★ (4) | 25 mi |
| Millovitsch Electric | 5.0★ (4) | 18 mi |
| Moonlight Plumbing LLC | 4.9★ (126) | In Groton |
| R J Electric | 5.0★ (3) | 20 mi |
| Satti's Family Trees | 5.0★ (271) | In Groton |
| Shore Electric LLC | 5.0★ (4) | 24 mi |
| Shoreline Electric | 3.6★ (7) | 25 mi |
| SLS HEATING LLC- 24 HOUR EMERGENCY SERVICE | 3.4★ (62) | In Groton |
| Tyler Electrical Services | 3.7★ (3) | 23 mi |
National price ranges in USD, not adjusted for Groton. Each row names its basis and the month we checked it.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Electrical panel upgrade | $518 | $1,347 | $2,193 | Per panel, installed; typical range of customer-reported jobs. US national range | October 2026 |
In Connecticut, Connecticut Department of Consumer Protection licenses Electrical wiring and equipment work.
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 101 Groton electricians 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 Groton 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 |