833 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Ilchester: Horizon Services - Air Conditioning, Heating, Plumbing, & Electrical, CR Score 65/100; 4.8★ from 4,514 Google reviews; open 24/7.
Best for emergencies (open 24/7): Michael & Son Services, posts 24/7 hours; ranked #2 of 833.
Most-reviewed: Len The Plumber Heating & Air, LLC, 15,911 Google reviews at 4.7★, the most of 833 ranked; ranked #7.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
833 Ilchester HVAC contractors are ranked here by CR Score, from ten published factors. 246 are open 24/7, 503 open Saturdays and 365 open Sundays, based on posted hours. The median Google rating is 4.8★ across 833 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Horizon Services - Air Conditioning, Heating, Plumbing, & Electrical | 65 | 4.8★ (4,514) | Baltimore, 5 mi away | 24/7 | Overall |
| 2 | Michael & Son Services | 63 | 4.7★ (8,039) | Baltimore, 13 mi away | 24/7 | Emergencies |
| 3 | Complete Climate Services LLC | 62 | 5.0★ (786) | Baltimore, 10 mi away | 24/7 | — |
| 4 | Environmental Systems Associates | 62 | 4.9★ (658) | Columbia, 7 mi away | 24/7 | — |
| 5 | Beltway Air Conditioning, Heating & Plumbing | 62 | 4.9★ (2,167) | Hanover, 8 mi away | 24/7 | — |
| 6 | Boothe's Heating, Air, Plumbing, Drains & Electrical | 62 | 4.9★ (1,461) | Dundalk, 13 mi away | 24/7 | — |
| 7 | Len The Plumber Heating & Air, LLC | 62 | 4.7★ (15,911) | Arbutus, 5 mi away | 24/7 | Most reviews |
| 8 | Clarksville Heating & Air, LLC | 62 | 5.0★ (729) | Hanover, 5 mi away | Sat · Sun | — |
| 9 | Sila Heating, Air Conditioning & Plumbing | 62 | 4.9★ (275) | Arbutus, 4 mi away | 24/7 | — |
| 10 | Alpha Heating & Air Conditioning, LLC | 62 | 4.9★ (419) | Arbutus, 7 mi away | 24/7 | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Ranked #1 in Ilchester
Based in Baltimore, 5 mi away
Ranked #1 because of its Google rating and trade focus: 4.8★ from 4,514 Google reviews, listed on Google as “HVAC contractor”.
Based in Baltimore, 13 mi away
Ranked #2 because of its Google rating and trade focus: 4.7★ from 8,039 Google reviews, listed on Google as “HVAC contractor”.
Based in Baltimore, 10 mi away
Ranked #3 because of its Google rating and trade focus: 5.0★ from 786 Google reviews, listed on Google as “HVAC contractor”.
Based in Columbia, 7 mi away
Ranked #4 because of its Google rating and trade focus: 4.9★ from 658 Google reviews, listed on Google as “HVAC contractor”.
Based in Hanover, 8 mi away
Ranked #5 because of its Google rating and trade focus: 4.9★ from 2,167 Google reviews, listed on Google as “HVAC contractor”.
Based in Dundalk, 13 mi away
Ranked #6 because of its Google rating and trade focus: 4.9★ from 1,461 Google reviews, listed on Google as “HVAC contractor”.
Based in Arbutus, 5 mi away
Ranked #7 because of its Google rating and review volume: 4.7★ from 15,911 Google reviews, the most in Ilchester.
Based in Hanover, 5 mi away
Ranked #8 because of its Google rating and trade focus: 5.0★ from 729 Google reviews, listed on Google as “HVAC contractor”.
Based in Arbutus, 4 mi away
Ranked #9 because of its Google rating and trade focus: 4.9★ from 275 Google reviews, listed on Google as “HVAC contractor”.
Based in Arbutus, 7 mi away
Ranked #10 because of its Google rating and trade focus: 4.9★ from 419 Google reviews, listed on Google as “HVAC contractor”.
Based in Eldersburg, 7 mi away
Ranked #11 because of its Google rating and trade focus: 5.0★ from 699 Google reviews, listed on Google as “HVAC contractor”.
Based in Gaithersburg, 24 mi away
Ranked #12 because of its Google rating and trade focus: 4.9★ from 6,908 Google reviews, listed on Google as “Heating contractor”.
Based in Columbia, 3 mi away
Ranked #13 because of its Google rating and trade focus: 4.8★ from 238 Google reviews, listed on Google as “HVAC contractor”.
Based in Arbutus, 6 mi away
Ranked #14 because of its Google rating and trade focus: 4.7★ from 472 Google reviews, listed on Google as “HVAC contractor”.
Based in Owings Mills, 12 mi away
Ranked #15 because of its Google rating and trade focus: 4.8★ from 931 Google reviews, listed on Google as “HVAC contractor”.
Based in Arbutus, 6 mi away
Ranked #16 because of its Google rating and trade focus: 4.9★ from 217 Google reviews, listed on Google as “HVAC contractor”.
Based in Arbutus, 4 mi away
Ranked #17 because of its Google rating and trade focus: 4.9★ from 142 Google reviews, listed on Google as “HVAC contractor”.
Based in Glen Burnie, 8 mi away
Ranked #18 because of its Google rating and trade focus: 4.9★ from 998 Google reviews, listed on Google as “HVAC contractor”.
Based in Columbia, 6 mi away
Ranked #19 because of its Google rating and trade focus: 5.0★ from 389 Google reviews, listed on Google as “HVAC contractor”.
Based in Laurel, 10 mi away
Ranked #20 because of its Google rating and trade focus: 4.4★ from 3,510 Google reviews, listed on Google as “HVAC contractor”.
Based in Ellicott City, 3 mi away
Ranked #21 because of its Google rating and trade focus: 4.9★ from 330 Google reviews, listed on Google as “HVAC contractor”.
Based in Ellicott City, 3 mi away
Ranked #22 because of its Google rating and trade focus: 4.8★ from 494 Google reviews, listed on Google as “HVAC contractor”.
Based in Baltimore, 9 mi away
Ranked #23 because of its Google rating and trade focus: 4.8★ from 354 Google reviews, listed on Google as “HVAC contractor”.
Based in Severn, 9 mi away
Ranked #24 because of its Google rating and trade focus: 4.8★ from 336 Google reviews, listed on Google as “HVAC contractor”.
Based in Annapolis, 22 mi away
Ranked #25 because of its Google rating and trade focus: 4.9★ from 2,904 Google reviews, listed on Google as “HVAC contractor”.
#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 833 ranked HVAC contractors here; the rest are on their profiles.
20 more HVAC contractors 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 |
|---|---|---|
| A-Gas Rapid Recovery - Baltimore | 5.0★ (2) | 12 mi |
| A.J. Michaels | 4.5★ (309) | 11 mi |
| Around the Clock Plumbing & Heating | 5.0★ (2) | 5 mi |
| Barstow & Sons Heating and Cooling | 4.9★ (1,127) | 23 mi |
| Beltway Air Conditioning, Heating & Plumbing | 4.9★ (90) | 5 mi |
| Bill Myers Inc | 4.5★ (2) | 12 mi |
| Capitol Boiler Works | 1.0★ (2) | 5 mi |
| Davis Plumbing & Heating Inc | 5.0★ (2) | 12 mi |
| DJE Plumbing and Heating | 5.0★ (2) | 13 mi |
| Elite Heating And Cooling | 3.0★ (2) | 15 mi |
| F.H. Furr Plumbing, Heating, Air Conditioning & Electrical | 4.8★ (1,788) | 8 mi |
| garagedoorsrepairellicottcitymd | 5.0★ (2) | 3 mi |
| JC & JC HVAC | 4.7★ (503) | 15 mi |
| Meleney Equipment Inc | 5.0★ (2) | 8 mi |
| One Call Services | 5.0★ (2) | 15 mi |
| Palmer Heating and Cooling | 5.0★ (2) | 5 mi |
| Reliability Home Services | 4.7★ (539) | 16 mi |
| Scardina Plumbing-Heating Inc | 5.0★ (2) | 9 mi |
| Shielded Edge Property Solutions | 5.0★ (2) | 5 mi |
| Wenbrooke Services - Electrical, Plumbing, Heating, and Air | 5.0★ (49) | 6 mi |
National price ranges in USD, not adjusted for Ilchester. Each row names its basis and the month we checked it.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| AC replacement | $3,887 | $5,978 | $8,073 | Per system, installed (unit plus labor); typical range of customer-reported jobs. US national range | October 2026 |
| Furnace replacement | $2,823 | $4,814 | $6,896 | Per system, installed; typical range of customer-reported jobs. US national range | October 2026 |
In Maryland, Maryland State Board of Heating, Ventilation, Air-Conditioning and Refrigeration Contractors licenses Heating, ventilation, air conditioning and refrigeration 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
HVAC demand peaks in summer for cooling and in winter for heating. Spring and fall are the easiest times to book maintenance or a replacement.
We scored 833 Ilchester HVAC contractors 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 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 Ilchester 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 |