9 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Seaside: Coast Heating & Cooling, LLC, CR Score 63/100; 4.9★ from 579 Google reviews.
Most-reviewed: Diamond Heating Inc, 112 Google reviews at 4.7★, the most of 9 ranked after Coast Heating & Cooling, LLC; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
9 Seaside HVAC contractors are ranked here by CR Score, from ten published factors. The median Google rating is 4.6★ across 9 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Best for |
|---|---|---|---|---|---|
| 1 | Coast Heating & Cooling, LLC | 63 | 4.9★ (579) | Seaside | Overall |
| 2 | Diamond Heating Inc | 59 | 4.7★ (112) | Seaside | Most reviews |
| 3 | White's Heating & Sheet Metal | 56 | 4.5★ (41) | Seaside | — |
| 4 | Dugan's Heating Solutions | 55 | 5.0★ (23) | Astoria, 14 mi away | — |
| 5 | Columbia Housewarmers | 53 | 4.3★ (50) | Astoria, 13 mi away | — |
| 6 | Precision Heating & Indoor Air Quality | 51 | 4.0★ (22) | Warrenton, 11 mi away | — |
| 7 | P & L Johnson Mechanical Inc | 51 | 3.9★ (48) | Astoria, 14 mi away | — |
| 8 | Coast Plumbing & Heating | 49 | 4.8★ (5) | Seaside | — |
| 9 | Burks Mechanical LLC Plumbing and Heating | 47 | 4.6★ (13) | Astoria, 15 mi away | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Ranked #1 because of its Google rating and review volume: 4.9★ from 579 Google reviews, the most in Seaside.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Seaside
Ranked #2 because of its Google rating and trade focus: 4.7★ from 112 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Seaside
Ranked #3 because of its Google rating and trade focus: 4.5★ from 41 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Astoria, 14 mi away
Ranked #4 because of its Google rating and trade focus: 5.0★ from 23 Google reviews, listed on Google as “HVAC contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Astoria, 13 mi away
Ranked #5 because of its Google rating and trade focus: 4.3★ from 50 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Warrenton, 11 mi away
Ranked #6 because of its Google rating and trade focus: 4.0★ from 22 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Astoria, 14 mi away
Ranked #7 because of its Google rating and trade focus: 3.9★ from 48 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Seaside
Ranked #8 because of its Google rating and trade focus: 4.8★ from 5 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Astoria, 15 mi away
Ranked #9 because of its Google rating and trade focus: 4.6★ from 13 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
National price ranges in USD, not adjusted for Seaside. 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 Oregon, Oregon Construction Contractors Board licenses Construction contractor license.
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
Oregon's HVAC demand peaks during summer heat waves and the first cold snaps. Spring and fall are the easiest times to book maintenance.
We scored 9 Seaside 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 Seaside 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 |