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Insulation Contractors · Seattle, WA/Updated June 13, 2026

The 10 Best Insulation Contractors in Seattle, WA

Insulation is key to energy efficiency in Seattle. Our list highlights the best local contractors to keep your home comfortable and cost-effective.

Editorially independent15 companies evaluated
cover story
★ Editor's ChoiceInsulation Co
96Score
Latest update · June 13, 2026: Initial ranking published. 15 Seattle-metro insulation contractors businesses evaluated, top 10 ranked by Vetted Score.

In a city like Seattle, where damp weather can lead to higher heating costs, proper insulation is essential for maintaining a comfortable home. With 15 providers evaluated, our ranked list reveals the strongest options based on real customer experiences.

We focused on businesses with proven track records, analyzing thousands of reviews to find contractors who deliver reliable service. The top-rated Insulation Co leads the pack with an impressive 5-star rating based on 288 reviews, setting a high standard in a competitive field.

15insulation contractors evaluated in Seattle
4.95average rating across the field
1.7Kcustomer reviews analyzed

Cityvetted analysis of public Google review data, updated June 13, 2026.

How much does insulation contractors cost in Seattle? See the price breakdown →

Our top picks

At a glance · three categories
★ Editor's Choice
96Score

Insulation Co

★★★★★5.0(288 reviews)

With a perfect rating of 5 stars from 288 reviews, Insulation Co is a clear leader in Seattle's insulation market.

Read full review
Best Value
94Score

Energy Saver Solutions Inc - HVAC & Insulation W Seattle holds a solid 5-star rating from 186 reviews.

Read full review
Best for Quick Service
93Score

With a 5-star rating from 161 reviews, Energy Saver Solutions Inc - HVAC & Insulation SW Seattle is known for their prompt and reliable service.

Read full review

All 10, compared

Data as of June 13, 2026
BusinessVetted ScoreGoogle ratingReviewsBest for
1
Insulation Co
Insulation Co
Editor's Choice
96Score
5.0★★★★★
288Comprehensive insulation projects
2
94Score
5.0★★★★★
186Energy efficiency improvements
3
93Score
5.0★★★★★
161Quick insulation services
4
91Score
4.9★★★★★
255Attic insulation and pest removal
5
90Score
5.0★★★★★
122Insulation upgrades and energy audits
6
89Score
4.9★★★★★
204Detailed insulation projects
7
87Score
5.0★★★★★
101Residential insulation needs
8
86Score
4.9★★★★★
109Retrofitting older homes
9
85Score
4.9★★★★★
88Energy-efficient insulation
10
82Score
5.0★★★★★
54Specialized insulation options
Methodology

How we evaluated all 15 insulation contractors.

To create our rankings, we examined the performance of each insulation contractor in Seattle, considering both customer ratings and the number of reviews. We ensure that no business pays for placement, making our rankings trustworthy and unbiased.

This list is updated monthly to reflect the latest customer feedback and changes in the local market. Our commitment is to provide you with the most accurate information to help you make informed decisions.

The Vetted Score: six weighted factors

Customer sentiment25%
Rating quality20%
Review volume & velocity20%
Website trust signals15%
Service breadth10%
Business longevity10%

Sentiment is measured by AI analysis of review text, recency-weighted, with verified-pattern checks to discount suspicious review bursts.

Full reviews

The rankings · in order
1
★ Editor's Choice

Insulation Co

★★★★★5.0(288 reviews)
96Score

With a perfect rating of 5 stars from 288 reviews, Insulation Co is a clear leader in Seattle's insulation market. Customers frequently praise their professionalism and efficiency, making them an excellent choice for comprehensive insulation projects. However, their popularity may mean longer wait times for service during peak seasons. A review base that deep is hard to game, and the score barely moves across it, which is the clearest consistency signal we track. Most of what reviewers hire it for is comprehensive insulation projects. It serves Seattle and surrounding areas, with $1,500 to $4,000 pricing, and the honest trade-offs are potentially longer wait times during busy periods.

Pros

  • Highly rated by numerous customers
  • Efficient service
  • Professional staff

Cons

  • Potentially longer wait times during busy periods
Best forComprehensive insulation projects
Service areaSeattle and surrounding areas
Typical pricing$1,500 to $4,000
2
Best Value

Energy Saver Solutions Inc - HVAC & Insulation W Seattle

★★★★★5.0(186 reviews)
94Score

Energy Saver Solutions Inc - HVAC & Insulation W Seattle holds a solid 5-star rating from 186 reviews. Reviewers commend their excellent customer service and value for money. This company is particularly recommended for those looking to improve energy efficiency at a reasonable price. A minor drawback is their limited service area compared to larger competitors.

Pros

  • Great customer service
  • Good value for money
  • Energy efficiency expertise

Cons

  • Limited service area
Best forEnergy efficiency improvements
Service areaWest Seattle
Typical pricing$1,200 to $3,500
3
Best for Quick Service

Energy Saver Solutions Inc - HVAC & Insulation SW Seattle

★★★★★5.0(161 reviews)
93Score

With a 5-star rating from 161 reviews, Energy Saver Solutions Inc - HVAC & Insulation SW Seattle is known for their prompt and reliable service. Customers appreciate their quick response times and effective solutions. However, some reviews note that their availability can be limited during peak times. That is a substantial body of feedback for a local operator, enough to trust the rating rather than credit a lucky streak. Most of what reviewers hire it for is quick insulation services. It serves Southwest Seattle, with $1,000 to $3,200 pricing, and the honest trade-offs are availability may be limited during busy periods.

Pros

  • Quick response times
  • Reliable service
  • Effective solutions

Cons

  • Availability may be limited during busy periods
Best forQuick insulation services
Service areaSouthwest Seattle
Typical pricing$1,000 to $3,200
4

Attic Doctor

★★★★★4.9(255 reviews)
91Score

Rated 4.9 stars from 255 reviews, Attic Doctor specializes in insulation and attic services. Customers appreciate their thorough assessments and knowledgeable staff. They are particularly well-regarded for attic insulation and pest removal. A downside is that they may not cover all areas of Seattle. A review base that deep is hard to game, and the score barely moves across it, which is the clearest consistency signal we track. Most of what reviewers hire it for is attic insulation and pest removal. It serves Seattle and nearby suburbs, with $1,000 to $3,000 pricing, and the honest trade-offs are limited coverage area.

Pros

  • Thorough assessments
  • Knowledgeable staff
  • Specialized in attic services

Cons

  • Limited coverage area
Best forAttic insulation and pest removal
Service areaSeattle and nearby suburbs
Typical pricing$1,000 to $3,000
5

Attic Star

★★★★★5.0(122 reviews)
90Score

Attic Star has a stellar 5-star rating from 122 reviews, highlighting their efficient insulation services and friendly technicians. They excel in insulation upgrades and energy audits. However, some customers have reported inconsistent scheduling, which may lead to delays. That is a substantial body of feedback for a local operator, enough to trust the rating rather than credit a lucky streak. Most of what reviewers hire it for is insulation upgrades and energy audits. It serves Seattle area, with $1,200 to $2,800 pricing, and the honest trade-offs are inconsistent scheduling.

Pros

  • Efficient service
  • Friendly technicians
  • Expertise in energy audits

Cons

  • Inconsistent scheduling
Best forInsulation upgrades and energy audits
Service areaSeattle area
Typical pricing$1,200 to $2,800
6

Super Attic Solutions

★★★★★4.9(204 reviews)
89Score

Super Attic Solutions rates 4.9 stars from 204 reviews, with customers praising their knowledgeable staff and quality workmanship. They are particularly recognized for their attention to detail in insulation projects. A drawback is their higher pricing compared to some competitors. A review base that deep is hard to game, and the score barely moves across it, which is the clearest consistency signal we track. Most of what reviewers hire it for is detailed insulation projects. It serves Seattle and surrounding areas, with $1,500 to $3,500 pricing, and the honest trade-offs are higher pricing than some competitors.

Pros

  • Knowledgeable staff
  • Quality workmanship
  • Attention to detail

Cons

  • Higher pricing than some competitors
Best forDetailed insulation projects
Service areaSeattle and surrounding areas
Typical pricing$1,500 to $3,500
7

Elevate Insulation

★★★★★5.0(101 reviews)
87Score

Elevate Insulation has a 5-star rating from 101 reviews, appreciated for their quick service and friendly staff. They are a good option for residential insulation needs. However, their limited review base means their long-term reliability is still somewhat unproven. That is a substantial body of feedback for a local operator, enough to trust the rating rather than credit a lucky streak. Most of what reviewers hire it for is residential insulation needs. It serves Seattle, with $1,000 to $2,500 pricing, and the honest trade-offs are limited review base.

Pros

  • Quick service
  • Friendly staff
  • Good for residential needs

Cons

  • Limited review base
Best forResidential insulation needs
Service areaSeattle
Typical pricing$1,000 to $2,500
8

Cascade RetroFoam

★★★★★4.9(109 reviews)
86Score

Cascade RetroFoam earns a 4.9-star rating from 109 reviews. Customers appreciate their innovative foam insulation solutions and knowledgeable technicians. They are particularly suited for retrofitting older homes. However, some clients have noted longer installation times. That is a substantial body of feedback for a local operator, enough to trust the rating rather than credit a lucky streak. Most of what reviewers hire it for is retrofitting older homes. It serves Seattle and nearby areas, with $1,200 to $3,000 pricing, and the honest trade-offs are longer installation times.

Pros

  • Innovative foam solutions
  • Knowledgeable technicians
  • Good for retrofitting

Cons

  • Longer installation times
Best forRetrofitting older homes
Service areaSeattle and nearby areas
Typical pricing$1,200 to $3,000
9

USA Insulation of North Puget Sound

★★★★★4.9(88 reviews)
85Score

USA Insulation of North Puget Sound has a 4.9-star rating from 88 reviews. Reviewers commend their insulation products and customer service. They are particularly known for their focus on energy efficiency. A downside is their availability can be limited in certain neighborhoods. That is a substantial body of feedback for a local operator, enough to trust the rating rather than credit a lucky streak. Most of what reviewers hire it for is energy-efficient insulation. It serves North Puget Sound region, with $1,500 to $3,500 pricing, and the honest trade-offs are limited availability in some neighborhoods.

Pros

  • Quality insulation products
  • Good customer service
  • Focus on energy efficiency

Cons

  • Limited availability in some neighborhoods
Best forEnergy-efficient insulation
Service areaNorth Puget Sound region
Typical pricing$1,500 to $3,500
10

Specialty Insulation NW

★★★★★5.0(54 reviews)
82Score

Specialty Insulation NW holds a perfect 5-star rating from 54 reviews. Customers appreciate their tailored solutions and friendly service. They are best for those seeking specialized insulation options. However, their smaller review count may raise questions about their long-term reliability. The sample is modest but steady, with reviewers describing the same strengths instead of one-off praise. Most of what reviewers hire it for is specialized insulation options. It serves Seattle and surrounding areas, with $1,000 to $2,500 pricing, and the honest trade-offs are smaller review count.

Pros

  • Tailored insulation solutions
  • Friendly service
  • Specialized options

Cons

  • Smaller review count
Best forSpecialized insulation options
Service areaSeattle and surrounding areas
Typical pricing$1,000 to $2,500
Before you book

How to choose an insulation contractor in Seattle

Selecting the right insulation contractor can significantly affect your home's energy efficiency and comfort. Here are key factors to consider:

Check Customer Reviews

Look for contractors with a high number of positive reviews. A provider like Insulation Co, with 288 reviews, offers a wealth of feedback to assess their reliability.

Evaluate Experience and Expertise

Consider how long the contractor has been in business and their specific expertise in insulation types relevant to Seattle's climate.

Request Detailed Estimates

Get quotes from multiple providers to compare pricing and services. A detailed estimate helps ensure there are no hidden costs later.

What it costs

What insulation costs in Seattle

The cost of insulation services can vary widely based on materials and project scope. Here's what you can expect:

Basic Insulation (attics, crawl spaces)$1.50 to $3.50 per square foot, depending on material type.
Blown-in Insulation$2.00 to $4.00 per square foot, offering good coverage for irregular spaces.
Spray Foam Insulation$3.50 to $6.00 per square foot, providing superior air sealing and energy efficiency.
Full Home Insulation Package$1,500 to $5,000 for comprehensive services, depending on home size and insulation needs.

Frequently asked questions

How much does insulation installation cost in Seattle?

Prices for insulation installation in Seattle typically range from $1,500 to $3,500, depending on the size of your home and the type of insulation used.

What should I look for in an insulation contractor?

Look for contractors with strong customer reviews, a solid track record of projects, and transparency in pricing. The top-rated options in Seattle have proven their worth based on numerous reviews.

How often is this ranking updated?

We re-run the full analysis monthly with fresh review data. Last updated June 13, 2026.

Our verdict

For most Seattle homes: <strong>Insulation Co</strong>

Insulation Co leads the pack with a perfect 5-star rating on 288 reviews, demonstrating a consistent level of service that is hard to match. Following closely is Energy Saver Solutions Inc - HVAC & Insulation W Seattle, also at 5 stars but with fewer reviews at 186, indicating strong but slightly less proven reliability. Rounding out the top three is Energy Saver Solutions Inc - HVAC & Insulation SW Seattle, which maintains the same 5-star rating with 161 reviews, showcasing solid performance. For the best insulation service in Seattle, start with Insulation Co, but consider the other two for their strong track records as well.