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Best HVAC Contractors in New Castle, DE (2026)

340 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →

The short answer

  1. 1

    Best overall in New Castle: Horizon Services - Air Conditioning, Heating, Plumbing, & Electrical, CR Score 66/100; 4.8★ from 9,075 Google reviews; open 24/7.

  2. 2

    Best for emergencies (open 24/7): Done Right Today, posts 24/7 hours; ranked #2 of 340.

  3. 10

    Most-reviewed: Sobieski Inc., 5,666 Google reviews at 4.7★, the most of 340 ranked after Horizon Services - Air Conditioning, Heating, Plumbing, & Electrical; ranked #10.

Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank

340 New Castle HVAC contractors are ranked here by CR Score, from ten published factors. 132 are open 24/7, 207 open Saturdays and 168 open Sundays, based on posted hours. The median Google rating is 4.8★ across 340 rated businesses.

Most of this list also appears on the HVAC contractors in Wilmington ranking. See HVAC contractors in Wilmington

Top 10 HVAC contractors in New Castle at a glance

Top 10 HVAC contractors in New Castle at a glance
RankBusinessCR ScoreGoogle ratingBased inHoursBest for
1Horizon Services - Air Conditioning, Heating, Plumbing, & Electrical664.8★ (9,075)Wilmington, 6 mi away24/7Overall
2Done Right Today665.0★ (2,228)Wilmington, 5 mi away24/7Emergencies
3LIAM Services665.0★ (979)New Castle24/7—
4F.H. Furr Plumbing, Heating, Air Conditioning & Electrical664.8★ (2,115)New Castle24/7—
5One Hour Heating & Air Conditioning® of Wilmington De664.9★ (3,009)Wilmington, 4 mi away24/7—
6Harris Plumbing, Heating, Air & Electrical654.8★ (1,753)New Castle24/7—
7Burns & McBride Home Comfort654.8★ (1,529)New Castle24/7—
8Maichle's Heating and Air Conditioning654.9★ (642)New Castle24/7—
9Aire Serv of Newark DE644.9★ (2,972)Newark, 11 mi away24/7—
10Sobieski Inc.644.7★ (5,666)Newark, 9 mi away24/7Most reviews

The 340 best HVAC contractors in New Castle, 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.

  2. #2 Done Right Today

    Based in Wilmington, 5 mi away

    66/100CR Score

    Ranked #2 because of its Google rating and trade focus: 5.0★ from 2,228 Google reviews, listed on Google as “HVAC contractor”.

    • 5.0★ from 2,228 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    19 Germay Dr, Wilmington, DE 19804
    View profile for Done Right Today(302) 433-6273

  3. #3 LIAM Services

    Based in New Castle

    66/100CR Score

    Ranked #3 because of its Google rating and trade focus: 5.0★ from 979 Google reviews, listed on Google as “HVAC contractor”.

    • 5.0★ from 979 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    292 Churchmans Rd, New Castle, DE 19720
    View profile for LIAM Services(302) 202-9742

  10. #10 Sobieski Inc.

    Based in Newark, 9 mi away

    64/100CR Score

    Ranked #10 because of its Google rating and trade focus: 4.7★ from 5,666 Google reviews, listed on Google as “HVAC contractor”.

    • 4.7★ from 5,666 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1325 Old Cooch's Bridge, Newark, DE 19713
    View profile for Sobieski Inc.(877) 707-1358

  13. #13 Boulden Brothers

    Based in Newark, 11 mi away

    63/100CR Score

    Ranked #13 because of its Google rating and trade focus: 4.8★ from 2,510 Google reviews, listed on Google as “Air conditioning repair service”.

    • 4.8★ from 2,510 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    107 Sandy Dr Building 700, Newark, DE 19713
    View profile for Boulden Brothers(302) 246-7878

  14. #14 Triton Services

    Based in Glasgow, 7 mi away

    63/100CR Score

    Ranked #14 because of its Google rating and trade focus: 5.0★ from 466 Google reviews, listed on Google as “HVAC contractor”.

    • 5.0★ from 466 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    600 Madison St, Delaware City, DE 19706
    View profile for Triton Services(302) 985-7656

  23. #23 Signature HVAC

    Based in West Chester, 23 mi away

    61/100CR Score

    Ranked #23 because of its Google rating and trade focus: 4.9★ from 3,053 Google reviews, listed on Google as “HVAC contractor”.

    • 4.9★ from 3,053 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1330 Enterprise Dr, West Chester, PA 19380
    View profile for Signature HVAC(484) 473-6107

HVAC contractors ranked #26 to #26

#1 to #25 are shown in full above. Here are #26 to #26, in CR Score order; each links to its profile. We publish the top 26 of 340 ranked HVAC contractors here; the rest are on their profiles.

HVAC contractors in New Castle, ranks 26 to 26
RankBusinessCR ScoreGoogle ratingDistance
26Desmond Heating And Cooling Solutions614.8★ (304)9 mi

How much do HVAC contractors cost in New Castle?

National price ranges in USD, not adjusted for New Castle. Each row names its basis and the month we checked it.

How much do HVAC contractors cost in New Castle?
JobLowTypicalHighBasisChecked
AC replacement$3,887$5,978$8,073Per system, installed (unit plus labor); typical range of customer-reported jobs. US national rangeOctober 2026
Furnace replacement$2,823$4,814$6,896Per system, installed; typical range of customer-reported jobs. US national rangeOctober 2026

How to check an HVAC contractor's license in Delaware

In Delaware, Delaware Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners licenses Heating, ventilation, air conditioning and refrigeration work.

  1. Search the business name or license number on the Delaware Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners license lookup.
  2. Check that the status is active and the name matches the contract or truck.
  3. 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 Delaware

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 New Castle HVAC contractors

We scored 340 New Castle 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.

Read the full method: formula, sources and exclusions

CR Score factors and weights
FactorWeightComputed fromIn New Castle data
Reputation25%Google star rating, adjusted for how many reviews back itMeasured
Credentials15%Active state license, bond and workers’ comp on fileNot yet collected
Review volume10%Number of Google reviews, compared with the most-reviewed business on the listMeasured
Recency5%Share of reviews from the last 12 monthsNot yet collected
Availability5%Weekly open hours, Saturday, Sunday, 24/7 or same-dayMeasured
Trade focus10%How clearly the business does this trade (its Google category and name)Measured
Proximity5%Based in the city scores highest, less the farther away it isMeasured
Claimed profile10%The business has claimed its ContractorsRanked profile (free or paid earn the same)Measured
Partnered5%The business links to ContractorsRanked from its own website with our badge, checked periodicallyMeasured
ContractorsRanked reviews10%Verified customer reviews collected by ContractorsRanked: their rating and how many there areMeasured

HVAC contractors in New Castle: frequently asked questions

Who is the best HVAC contractor in New Castle?

By CR Score, the highest-ranked HVAC contractor in New Castle, DE is Horizon Services - Air Conditioning, Heating, Plumbing, & Electrical with a CR Score of 66/100. It has 4.8★ from 9,075 Google reviews. It is open 24/7. Done Right Today (#2) and LIAM Services (#3) follow. We ranked 340 HVAC contractors on ten factors, last updated October 22, 2026.

How many HVAC contractors are there in New Castle?

ContractorsRanked ranks 340 HVAC contractors serving New Castle, DE. 5 of them are based in New Castle; the rest serve it from nearby towns. Counts are as of October 2026.

Which HVAC contractors in New Castle are open 24/7?

132 ranked HVAC contractors in New Castle post 24/7 hours. The highest-ranked are Horizon Services - Air Conditioning, Heating, Plumbing, & Electrical (#1), Done Right Today (#2) and LIAM Services (#3). Hours come from each business's Google listing as of October 2026, so call to confirm.

Which HVAC contractors in New Castle work on weekends?

207 of 340 ranked HVAC contractors post Saturday hours and 168 post Sunday hours. The highest-ranked open Saturdays are Horizon Services - Air Conditioning, Heating, Plumbing, & Electrical (#1), Done Right Today (#2) and LIAM Services (#3). Posted hours are office hours; crews may book weekend jobs separately.

How do I check an HVAC contractor's license in Delaware?

In Delaware, Delaware Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners handles licensing and covers Heating, ventilation, air conditioning and refrigeration work. Search the business or license number at https://delpros.delaware.gov/OH_VerifyLicense.

How much does ac replacement cost in New Castle?

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 New Castle. Prices were last checked October 2026. Get at least two written quotes before you hire.

What Google rating do New Castle HVAC contractors have?

The median Google rating among 340 rated HVAC contractors in New Castle is 4.8★, with a median of 26 reviews. Horizon Services - Air Conditioning, Heating, Plumbing, & Electrical has the most, 9,075 reviews, and ranks #1. 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 New Castle?

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 New Castle

  1. October 2026: CR Scores recalculated for 340 hvac contractors serving New Castle.
  2. October 2026: 4 duplicate listings merged.

More HVAC contractors and New Castle pages

Other trades in New Castle