12 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Healdsburg: Under The House., CR Score 59/100; 5.0★ from 62 Google reviews; open 7 days a week.
Best for emergencies (open 24/7): KC Home Services Plumbing, Heating & AC Repair, posts 24/7 hours; ranked #2 of 12.
Most-reviewed: KC Home Services Plumbing, Heating & AC Repair, 827 Google reviews at 4.9★, the most of 12 ranked; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
12 Healdsburg insulation contractors are ranked here by CR Score, from ten published factors. 1 is open 24/7, 6 open Saturdays and 3 open Sundays, based on posted hours. The median Google rating is 5.0★ across 12 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Under The House. | 59 | 5.0★ (62) | Santa Rosa, 13 mi away | Sat · Sun · Evenings | Overall |
| 2 | KC Home Services Plumbing, Heating & AC Repair | 58 | 4.9★ (827) | Santa Rosa, 16 mi away | 24/7 | Emergencies, Most reviews |
| 3 | Clean CrawlSpace Inc. | 54 | 5.0★ (57) | Santa Rosa, 17 mi away | — | — |
| 4 | Santa Rosa Spray Foam Insulation | 54 | 5.0★ (24) | Santa Rosa, 12 mi away | — | — |
| 5 | Sonoma Insulation Company | 53 | 5.0★ (6) | Larkfield-Wikiup, 11 mi away | Sat | — |
| 6 | Cal Spray Foam Insulation | 53 | 5.0★ (7) | Larkfield-Wikiup, 12 mi away | Sat | — |
| 7 | Insulation Solutions | 53 | 4.9★ (29) | Santa Rosa, 15 mi away | — | — |
| 8 | North Bay Insulation Inc | 53 | 4.0★ (6) | Santa Rosa, 12 mi away | — | — |
| 9 | MKM Insulation Contractor of Santa Rosa CA | 53 | 5.0★ (6) | Santa Rosa, 14 mi away | Sat · Evenings | — |
| 10 | Coast Building Products | 50 | 4.4★ (9) | Santa Rosa, 18 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 trade focus: 5.0★ from 62 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Santa Rosa, 16 mi away
Ranked #2 because of its Google rating and review volume: 4.9★ from 827 Google reviews, the most in Healdsburg.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Santa Rosa, 17 mi away
Ranked #3 because of its Google rating and trade focus: 5.0★ from 57 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Santa Rosa, 12 mi away
Ranked #4 because of its Google rating and trade focus: 5.0★ from 24 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Larkfield-Wikiup, 11 mi away
Ranked #5 because of its Google rating and trade focus: 5.0★ from 6 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Larkfield-Wikiup, 12 mi away
Ranked #6 because of its Google rating and trade focus: 5.0★ from 7 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Santa Rosa, 15 mi away
Ranked #7 because of its Google rating and trade focus: 4.9★ from 29 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Santa Rosa, 12 mi away
Ranked #8 because of its Google rating and trade focus: 4.0★ from 6 Google reviews, listed on Google as “Insulation contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Santa Rosa, 14 mi away
Ranked #9 because of its Google rating and trade focus: 5.0★ from 6 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Santa Rosa, 18 mi away
Ranked #10 because of its Google rating and trade focus: 4.4★ from 9 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Cotati, 21 mi away
Ranked #11 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Santa Rosa, 14 mi away
Ranked #12 because of its Google rating and trade focus: 3.8★ from 5 Google reviews, listed on Google as “Roofing contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
7 more insulation 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 |
|---|---|---|
| B & D Insulation | 5.0★ (1) | 17 mi |
| California State Insulation | 5.0★ (2) | 15 mi |
| Certified Specialists, Inc. | 5.0★ (2) | 17 mi |
| North Bay Insulation | 13 mi | |
| North Bay Pacific Insulators | 5.0★ (1) | 13 mi |
| Rohnert Park attic insulation | 1.0★ (1) | 21 mi |
| Valente's Handyman Service | 1.0★ (1) | 19 mi |
National price ranges in USD, not adjusted for Healdsburg. Each row names its basis and the month we checked it.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Attic insulation | $1,700 | $2,100 | $2,500 | Per attic: typical range of customer-reported jobs (about $1 to $3 per sq ft). US national range | October 2026 |
We scored 12 Healdsburg insulation 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 Healdsburg 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 |