64/100CR Score
Ranked #1 because of its Google rating and trade focus: 4.8★ from 8,326 Google reviews, listed on Google as “HVAC contractor”.
- 4.8★ from 8,326 Google reviews
- Hours
- Mon–Sun 8 AM–6 PM
- Address
- 3400 Sharp St, Hyattsville, MD 20785
Best HVAC Contractors in Walker Mill, MD (2026)
969 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Walker Mill: Michael & Son Services, CR Score 64/100; 4.8★ from 8,326 Google reviews; open 7 days a week.
- 2
Best for emergencies (open 24/7): United Air Temp, posts 24/7 hours; ranked #2 of 969.
- 4
Most-reviewed: Michael & Son Services, 15,537 Google reviews at 4.7★, the most of 969 ranked; ranked #4.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
969 Walker Mill HVAC contractors are ranked here by CR Score, from ten published factors. 306 are open 24/7, 634 open Saturdays and 437 open Sundays, based on posted hours. The median Google rating is 4.9★ across 969 rated businesses.
Top 10 HVAC contractors in Walker Mill at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Michael & Son Services | 64 | 4.8★ (8,326) | Hyattsville, 5 mi away | Sat · Sun | Overall |
| 2 | United Air Temp | 63 | 4.8★ (1,775) | Fort Washington, 6 mi away | 24/7 | Emergencies |
| 3 | Belair Engineering and Service Company, Inc. | 63 | 4.9★ (1,421) | Greater Upper Marlboro, 9 mi away | 24/7 | — |
| 4 | Michael & Son Services | 63 | 4.7★ (15,537) | Alexandria, 16 mi away | 24/7 | Most reviews |
| 5 | Len The Plumber Heating & Air, LLC | 62 | 4.6★ (8,136) | Silver Spring, 12 mi away | 24/7 | — |
| 6 | United Air Temp | 62 | 4.8★ (1,306) | Greenbelt, 8 mi away | 24/7 | — |
| 7 | John C. Flood | 62 | 4.8★ (4,976) | Alexandria, 16 mi away | 24/7 | — |
| 8 | CroppMetcalfe | 62 | 4.8★ (7,638) | Fairfax, 19 mi away | 24/7 | — |
| 9 | Krafft Service Corporation | 62 | 4.9★ (1,631) | Alexandria, 14 mi away | 24/7 | — |
| 10 | AZA heating, cooling, plumbing & construction | 62 | 5.0★ (959) | Alexandria, 14 mi away | 24/7 | — |
The 969 best HVAC contractors in Walker Mill, ranked
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.
Based in Fort Washington, 6 mi away
63/100CR ScoreRanked #2 because of its Google rating and trade focus: 4.8★ from 1,775 Google reviews, listed on Google as “HVAC contractor”.
- 4.8★ from 1,775 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 5620 St Barnabas Rd Ste 240, Fort Washington, MD 20744
Based in Greater Upper Marlboro, 9 mi away
63/100CR ScoreRanked #3 because of its Google rating and trade focus: 4.9★ from 1,421 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 1,421 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 15881 Commerce Ct, Upper Marlboro, MD 20774
Based in Alexandria, 16 mi away
63/100CR ScoreRanked #4 because of its Google rating and review volume: 4.7★ from 15,537 Google reviews, the most in Walker Mill.
- 4.7★ from 15,537 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 5740 General Washington Dr, Alexandria, VA 22312
Based in Silver Spring, 12 mi away
62/100CR ScoreRanked #5 because of its Google rating and trade focus: 4.6★ from 8,136 Google reviews, listed on Google as “HVAC contractor”.
- 4.6★ from 8,136 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 550 Forest Glen Rd, Silver Spring, MD 20901
Based in Greenbelt, 8 mi away
62/100CR ScoreRanked #6 because of its Google rating and trade focus: 4.8★ from 1,306 Google reviews, listed on Google as “HVAC contractor”.
- 4.8★ from 1,306 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 7255 Hanover Pkwy Ste A, Greenbelt, MD 20770
Based in Alexandria, 16 mi away
62/100CR ScoreRanked #7 because of its Google rating and trade focus: 4.8★ from 4,976 Google reviews, listed on Google as “HVAC contractor”.
- 4.8★ from 4,976 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 6430 General Green Way, Alexandria, VA 22312
Based in Fairfax, 19 mi away
62/100CR ScoreRanked #8 because of its Google rating and trade focus: 4.8★ from 7,638 Google reviews, listed on Google as “HVAC contractor”.
- 4.8★ from 7,638 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 8421 Hilltop Rd, Fairfax, VA 22031
Based in Alexandria, 14 mi away
62/100CR ScoreRanked #9 because of its Google rating and trade focus: 4.9★ from 1,631 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 1,631 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 5707A Edsall Rd, Alexandria, VA 22304
Based in Alexandria, 14 mi away
62/100CR ScoreRanked #10 because of its Google rating and trade focus: 5.0★ from 959 Google reviews, listed on Google as “HVAC contractor”.
- 5.0★ from 959 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 5800 Quantrell Ave #1510, Alexandria, VA 22312
Based in Crofton, 13 mi away
62/100CR ScoreRanked #11 because of its Google rating and trade focus: 4.9★ from 1,156 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 1,156 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 2142 Priest Bridge Court #6, Crofton, MD 21114
#12 Caffi Services
Based in Alexandria, 9 mi away
61/100CR ScoreRanked #12 because of its Google rating and trade focus: 4.9★ from 508 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 508 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1313 Powhatan St, Alexandria, VA 22314
Based in Cheverly, 3 mi away
61/100CR ScoreRanked #13 because of its Google rating and trade focus: 4.9★ from 166 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 166 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1712 62nd Ave, Cheverly, MD 20785
#14 GAC Services
Based in Gaithersburg, 24 mi away
61/100CR ScoreRanked #14 because of its Google rating and trade focus: 4.9★ from 6,908 Google reviews, listed on Google as “Heating contractor”.
- 4.9★ from 6,908 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 227 E Deer Park Dr, Gaithersburg, MD 20877
Based in Clarksburg, 6 mi away
61/100CR ScoreRanked #15 because of its Google rating and trade focus: 4.8★ from 302 Google reviews, listed on Google as “HVAC contractor”.
- 4.8★ from 302 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Largo, 3 mi away
61/100CR ScoreRanked #16 because of its Google rating and trade focus: 4.8★ from 176 Google reviews, listed on Google as “HVAC contractor”.
- 4.8★ from 176 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 9701 Apollo Dr Suite 100-16, Largo, MD 20774
Based in Silver Spring, 11 mi away
61/100CR ScoreRanked #17 because of its Google rating and trade focus: 5.0★ from 293 Google reviews, listed on Google as “HVAC contractor”.
- 5.0★ from 293 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 9407 New Hampshire Ave, Silver Spring, MD 20903
Based in Washington, D.C., 6 mi away
61/100CR ScoreRanked #18 because of its Google rating and trade focus: 4.9★ from 205 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 205 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 100 M St SE #600, Washington, DC 20003
Based in Fairfax, 18 mi away
61/100CR ScoreRanked #19 because of its Google rating and trade focus: 4.9★ from 1,794 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 1,794 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 2800 Juniper St #10, Fairfax, VA 22031
Based in Annapolis, 21 mi away
61/100CR ScoreRanked #20 because of its Google rating and trade focus: 4.9★ from 2,904 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 2,904 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1991 Moreland Pkwy, Annapolis, MD 21401
#21 GW Air Service
Based in St. Charles, 8 mi away
61/100CR ScoreRanked #21 because of its Google rating and trade focus: 4.9★ from 270 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 270 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Greater Upper Marlboro, 6 mi away
61/100CR ScoreRanked #22 because of its Google rating and trade focus: 5.0★ from 379 Google reviews, listed on Google as “HVAC contractor”.
- 5.0★ from 379 Google reviews
- Hours
- Mon–Fri 8 AM–6 PM · Sat–Sun 9 AM–4 PM
Based in Rockville, 20 mi away
61/100CR ScoreRanked #23 because of its Google rating and trade focus: 4.7★ from 5,985 Google reviews, listed on Google as “HVAC contractor”.
- 4.7★ from 5,985 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 685 Lofstrand Ln, Rockville, MD 20850
Based in Alexandria, 12 mi away
61/100CR ScoreRanked #24 because of its Google rating and trade focus: 4.9★ from 440 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 440 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 3045 Colvin St, Alexandria, VA 22314
Based in Rosaryville, 19 mi away
61/100CR ScoreRanked #25 because of its Google rating and trade focus: 5.0★ from 1,032 Google reviews, listed on Google as “HVAC contractor”.
- 5.0★ from 1,032 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 2003 Chaneyville Rd, Owings, MD 20736
HVAC contractors ranked #26 to #50
#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 969 ranked HVAC contractors here; the rest are on their profiles.
Also serving Walker Mill
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 |
|---|---|---|
| Barivo HVAC Repair Washington | 5.0★ (2) | 9 mi |
| Cora AC | 5.0★ (2) | 7 mi |
| Coreno HVAC Repair Washington | 5.0★ (2) | 9 mi |
| Cyprus Air Heating, Cooling and Fireplaces | 4.3★ (2,189) | 14 mi |
| DC HVAC, Heating and Air Conditioning | 5.0★ (2) | 7 mi |
| Heravo HVAC Repair Washington | 5.0★ (2) | 8 mi |
| Homestead Handymen HVAC/R, LLC | 5.0★ (2) | 9 mi |
| Horizon Mechanical Services LLC | 5.0★ (2) | 3 mi |
| JDL HVAC & Plumbing Services | 4.8★ (678) | 15 mi |
| Logan Mechanical LLC | 4.7★ (155) | 7 mi |
| McCarthy Services | 4.4★ (3,547) | 19 mi |
| R And R Climate Control Inc | 5.0★ (2) | 9 mi |
| S&W Controls, Inc. | 5.0★ (2) | 3 mi |
| T & T Plumbing And Heating | 5.0★ (2) | 6 mi |
| Teravo HVAC Repair Washington | 5.0★ (2) | 9 mi |
| Ultra Painting HVAC Pros | 5.0★ (2) | 8 mi |
| United Air Temp | 4.4★ (4,301) | 18 mi |
| United Service Company | 5.0★ (2) | 2 mi |
| Xavino HVAC Repair Washington | 5.0★ (2) | 9 mi |
| Zelavo HVAC Repair Washington | 5.0★ (2) | 9 mi |
How much do HVAC contractors cost in Walker Mill?
National price ranges in USD, not adjusted for Walker Mill. 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 |
How to check an HVAC contractor's license in Maryland
In Maryland, Maryland State Board of Heating, Ventilation, Air-Conditioning and Refrigeration Contractors licenses Heating, ventilation, air conditioning and refrigeration work.
- Check that the status is active and the name matches the contract or truck.
- Ask for proof of insurance before work starts.
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
When to hire an HVAC contractor in Maryland
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.
How we ranked Walker Mill HVAC contractors
We scored 969 Walker Mill 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 Walker Mill 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 |
HVAC contractors in Walker Mill: frequently asked questions
Who is the best HVAC contractor in Walker Mill?
By CR Score, the highest-ranked HVAC contractor in Walker Mill, MD is Michael & Son Services with a CR Score of 64/100. It has 4.8★ from 8,326 Google reviews. It is open 7 days a week. United Air Temp (#2) and Belair Engineering and Service Company, Inc. (#3) follow. We ranked 969 HVAC contractors on ten factors, last updated October 22, 2026.
How many HVAC contractors are there in Walker Mill?
ContractorsRanked ranks 969 HVAC contractors serving Walker Mill, MD. Another 20 within 25 mi are listed but not ranked yet. Counts are as of October 2026.
Which HVAC contractors in Walker Mill are open 24/7?
306 ranked HVAC contractors in Walker Mill post 24/7 hours. The highest-ranked are United Air Temp (#2), Belair Engineering and Service Company, Inc. (#3) and Michael & Son Services (#4). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which HVAC contractors in Walker Mill work on weekends?
634 of 969 ranked HVAC contractors post Saturday hours and 437 post Sunday hours. The highest-ranked open Saturdays are Michael & Son Services (#1), United Air Temp (#2) and Belair Engineering and Service Company, Inc. (#3). Posted hours are office hours; crews may book weekend jobs separately.
How do I check an HVAC contractor's license in Maryland?
In Maryland, Maryland State Board of Heating, Ventilation, Air-Conditioning and Refrigeration Contractors handles licensing and covers Heating, ventilation, air conditioning and refrigeration work.
How much does ac replacement cost in Walker Mill?
AC replacement typically costs $3,887 to $8,073, with $5,978 typical (Per system, installed (unit plus labor); typical range of customer-reported jobs. US national range). This is a national range, not adjusted for Walker Mill. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do Walker Mill HVAC contractors have?
The median Google rating among 969 rated HVAC contractors in Walker Mill is 4.9★, with a median of 23 reviews. Michael & Son Services has the most, 15,537 reviews, and ranks #4. We adjust ratings for review count, so a few five-star reviews cannot top the list.
When is the best time to hire an HVAC contractor in Walker Mill?
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.
Update log for Walker Mill
- October 2026: CR Scores recalculated for 969 hvac contractors serving Walker Mill.
- October 2026: 11 duplicate listings merged.
More HVAC contractors and Walker Mill pages
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- Window installers in Walker Mill645 ranked
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